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A new policy in the Pantanal wetland, Brazil, aims to economically displace thousands of artisanal fishers from one‐third of the region. The legislation disregards several FAO Voluntary Guidelines for Securing Sustainability in Small‐Scale Fisheries' guiding principles (SSF guidelines). Considering that 2024 marks the 10th anniversary of these guidelines, this policy represents a significant setback for fish and fisheries worldwide. In this paper, we show that the legislation is part of long‐term agenda against small‐scale fishers in the Pantanal, aiming to use narratives around overfishing to justify physical and economic displacements—albeit no empirical evidence showing impact on fish stocks. We also show that, as in many other small‐scale fisheries worldwide, overfishing narratives are, in fact, used to open space for industrial activities and large infrastructure projects. The Pantanal is a telling story of that, since the new legislation will likely open space for the construction of over 50 small hydroelectric dams in the Pantanal and surrounding area. We argue that, first, it is urgent to abolish the new legislation and promote a pro‐fishers agenda in the Pantanal to protect the region. However, since this is not unique for the region, it is critical to implement international programmes that celebrate and support local fisheries worlwide and avoid physical and economic displacements. Stands out turning SSF guidelines into international agreements, implementing citizens science programmes and expanding the fisher's tenure rights through innovative mechanizes of ownership. By better protecting local small‐scale fishers in the Pantanal and worldwide we are more likely to guarantee a sustainable future for ecosystems and its peoples. [ABSTRACT FROM AUTHOR]

ABSTRACT Artisanal fishing significantly not only contributes to socioeconomic development of numerous countries but also exerts pressure on natural populations. The white shrimp (Penaeus schmitti) is a key species in Brazilian artisanal fisheries, yet it is currently classified as data‐deficient. Conducting comprehensive studies on its population dynamics is essential to establish reference points that guarantee sustainable fishing. Therefore, we estimated population parameters to assess status of the white shrimp stock captured by beach seining in Northeast Brazil. Monthly samples of white shrimp were collected using a beach trawl. Based on population parameters, the white shrimp population in the study area, the sex ratio was 1 male to 1.29 females, with females larger and heavier than males. Weight–length relationships revealed positive allometric growth for males, females, and grouped sexes, with no significant difference between sexes. Asymptotic length, t_achor, and growth performance index also did not differ between sexes; however, the growth coefficient was higher for females. Beach trawling in northeastern Brazil predominantly targeted adult white shrimp, with carapace length at first capture (Lc50) averaging 2.12 cm for females and 2.19 cm for males. Mortality and exploitation rates were below maximum sustainable levels, so the stock was classified as underexploited. Overall, beach‐seine fishing was less harmful to this stock (F = 1.42) than motorized fishing and can be considered a sustainable fishing activity for the white shrimp population. [ABSTRACT FROM AUTHOR]

AbstractMany coastal small-scale fishing (SSF) communities in low and middle-income countries are experiencing urbanisation due to global development and migration patterns. Scholars have documented how processes related to urbanisation present SSF communities with a unique series of opportunities and challenges. However, it is still poorly understood how SSF communities perceive and pursue resilience while adapting to these changing conditions. To address this gap, we conduct ethnographic research among the members of a fishing cooperative in Cancun, Mexico. We find that four factors related to Cancun’s pattern of development have incentivized local fishers to adopt a trans-sector perspective of livelihood resilience through which they view fishing as a lucrative but fleeting opportunity, with some actively planning a transition to non-fishing livelihoods. These four factors are the depletion of local fisheries, rising land values, the proliferation of non-fishing livelihood opportunities, and regional migration patterns. Whether local fishers ultimately prove resilient to the stresses of urbanisation depends partly upon the degree to which local governance and support systems align with this perspective. By contextualizing these findings within the broader literature on SSFs and urban development, we develop a heuristic to hypothesize to what extent these findings are generalizable beyond the study context. [ABSTRACT FROM AUTHOR]

Small-scale fisheries have been typically data-limited despite their economic importance for local communities. This is especially true in zones where fishing operations occur in remote areas under harsh weather conditions. Crab fishery in Chile is exclusively artisanal, and marble crab (Metacarcinus edwardsii) has the highest landing records. This species is found in most parts of the coast of Chile, but it is mainly caught in the south of the country (including Patagonia). Fishery management is data-limited, and monitoring has not established the spatial and temporal variability baseline necessary to determine its exploitation status. This fishery is currently evaluated annually under a scheme based on reporting biological and fishery information, primarily from the landing ports and secondarily from fishing grounds. In the present study, we collected data from fishing grounds on board artisanal fishing vessels around 45°S during an annual cycle to establish indicators based on catch per unit effort (above and below minimum legal size), size, sex ratio, and the relationship between weight and size. Our results showed that fishery and biological indicators respond more to seasonal patterns than to expected spatial heterogeneity related to different fishing grounds: proportional stock density (lowest in winter), sex ratio (biased toward males in winter), retained catch (highest in autumn), and released catch (highest in winter), while the average size of the largest 10% of the sample only showed differences between males and females. Additionally, released catch varied according to soak time, which indicates the effectiveness of escape rings incorporated in the traps. These results lead to recommendations related to the current monitoring program, which should include the selection of a limited number of fishing grounds standardized by season and the incorporation of information related to soak time and the presence of escape rings. Finally, this study highlights the importance of on-board scientific monitoring for any fisheries, even those of small scale. [ABSTRACT FROM AUTHOR]

Fishery resources overexploitation, together with bycatch and discards, have an impact on marine ecosystems. The adoption of technologically innovative gears is a possible solution to reduce the discard and to enhance the sustainability of fishery, mainly in artisanal fisheries that represent about 80% of the EU Mediterranean fleet. In the perspective of fishery sustainability, it is necessary to study and test alternative gears to the traditional ones, also with collaboration of fishers. In the present study, results of experimental fishing activities carried out in two Mediterranean areas with traditional and innovative gears of small-scale fishing are reported. Thirty-four hauls were carried out to compare the catch of two types of trammel nets: a traditional one and experimental guarding net. Additionally, 12 hauls were carried out to compare collapsible pots and traditional pots. No significant differences were recorded between trammel nets in terms of commercial catch and discard. However, interesting differences in discard composition were recorded, with higher Elasmobranchs presence in trammel nets, including species assessed as critically endangered and vulnerable. The use of trapula pots in place of traditional ones showed a lower discard of specific resources and an advantage for fishers in terms of space occupied on board. [ABSTRACT FROM AUTHOR]

Fishing is one of the main threats to sea turtles due to the risk of entanglement in lost nets, vessel collision and mortality due to incidental catches. In Brazil, most of the studies regarding fishing interactions with sea turtles are focused on pelagic longline fisheries in the South and Southeast regions. However, their main reproductive areas in Southwest Atlantic RMU occur in Northeast Brazil, which overlaps small-scale coastal gillnet fisheries. Here, we aimed to use ethnobiology and participatory approaches as simple and cost-effective methods to identify areas for sea turtle conservation where impacts from small-scale fisheries are most likely. Expert captains were trained to recording sea turtle sightings during navigations from the landing port to the fishing grounds, informing their folk nomenclatures. By interpolation of environmental data (chlorophyll and bathymetry) and ecological data, we predicted habitats of 3,459.96 km² for Caretta caretta, Chelonia mydas, and Eretmochelys imbricata and fishing zones of 1,087 km² for management in 20 m and 50 m depths. Our results contributes to ongoing discussions of bycatch mitigation for sea turtle species and identification of habitats. We highlights the importance of considering particularities of overlapped areas in marine spatial planning and co-management arrangements. [ABSTRACT FROM AUTHOR]

Small-scale fisheries have been typically data-limited despite their economic importance for local communities. This is especially true in zones where fishing operations occur in remote areas under harsh weather conditions. Crab fishery in Chile is exclusively artisanal, and marble crab (Metacarcinus edwardsii) has the highest landing records. This species is found in most parts of the coast of Chile, but it is mainly caught in the south of the country (including Patagonia). Fishery management is data-limited, and monitoring has not established the spatial and temporal variability baseline necessary to determine its exploitation status. This fishery is currently evaluated annually under a scheme based on reporting biological and fishery information, primarily from the landing ports and secondarily from fishing grounds. In the present study, we collected data from fishing grounds on board artisanal fishing vessels around 45°S during an annual cycle to establish indicators based on catch per unit effort (above and below minimum legal size), size, sex ratio, and the relationship between weight and size. Our results showed that fishery and biological indicators respond more to seasonal patterns than to expected spatial heterogeneity related to different fishing grounds: proportional stock density (lowest in winter), sex ratio (biased toward males in winter), retained catch (highest in autumn), and released catch (highest in winter), while the average size of the largest 10% of the sample only showed differences between males and females. Additionally, released catch varied according to soak time, which indicates the effectiveness of escape rings incorporated in the traps. These results lead to recommendations related to the current monitoring program, which should include the selection of a limited number of fishing grounds standardized by season and the incorporation of information related to soak time and the presence of escape rings. Finally, this study highlights the importance of on-board scientific monitoring for any fisheries, even those of small scale.

The clam fishery in northwestern Mexico encompasses the mangrove cockle Anadara tuberculosa. It is extracted manually, at low tides and between the roots of mangroves. Biological samplings were carried out in Estero Las Lajitas, Sinaloa, from May 2021 to April 2022. A total of 661 A. tuberculosa organisms were analyzed, of which 126 were males, were 363 females and 172 were undifferentiated, yielding a statistically different overall sex ratio between females and males (1♀:0.3♂) (X2 = 113.19; p < 0.05). The length–weight relationship showed a potential type (W = 0.0002L3.125) (95% CI 3.027–3.222 for b). To determine the growth of the species, five models were employed: von Bertalanffy, Gompertz, Logistic, Richards, and Gompertz using an oscillatory component (GO). The Akaike Corrected Information Index for Small Samples (AICC) was used. The GO model yielded the lowest AICC (L∞ = 80.98 mm 95% CI 77.59–84.36, k = 1.02 year−1 95% CI 0.89–1.16), a low growth oscillation intensity (C = 0.03), and slower growth in August (WP = 1.67). The Logistic and Gompertz models were used to calculate the size-at-maturity (L50%). Gompertz obtained the lowest AICC with L50% = 32.53 mm (95% CI 30.67–34.31). Considering the lack of biological information and the parameters generated in the present investigation, as regards A. tuberculosa on the coast of Sinaloa, Mexico, its dissemination is essential for the adequate management of the fishery. [ABSTRACT FROM AUTHOR]

Mounting evidence suggests that fishing can be a major driver of coral‐to‐macroalgae regime shifts on tropical reefs. In many small‐scale coral reef fisheries, fishers target herbivorous fishes, which can weaken coral resilience via reduced herbivory on macroalgae that then outcompete corals. Previous models that explored the effects of harvesting herbivores revealed hysteresis in the herbivory–benthic state relationship that results in bistability of coral‐ and macroalgae‐dominated states over some levels of fishing pressure, which has been supported by empirical evidence. However, past models have not accounted for the functional differences among herbivores or how fisher selectivity for different herbivore functional groups may alter the benthic dynamics and resilience. Here, we use a dynamic model that links differential fishing on two key herbivore functional groups to the outcome of competitive dynamics between coral and macroalgae. We show that reef state depends not only on the level of fishing but also on the types of herbivores targeted by fishers. Selectively fishing browsing herbivores that are capable of consuming mature macroalgae (e.g., unicornfish) increases precariousness of the coral state by moving the system close to the coral‐to‐macroalgae tipping point. By contrast, selectively harvesting grazing herbivores that are only capable of preventing macroalgae from becoming established (e.g., parrotfishes) can increase catch yields substantially more before the tipping point is reached. However, this lower precariousness with increasing fishing effort comes at the cost of increasing the range of fishing effort over which coral and macroalgae are bistable; increasing hysteresis makes a regime shift triggered by a disturbance more difficult or impractical to reverse. Our results suggest that management strategies for small‐scale coral reef fisheries should consider how functional differences among harvested herbivores coupled with fisher selectivity influence benthic dynamics in light of the trade‐off between tipping point precariousness and coral recovery dynamics following large disturbances. [ABSTRACT FROM AUTHOR]

A commercial fishery for the Cape rock oyster Striostrea margaritacea along the north coast of KwaZulu-Natal, South Africa (western Indian Ocean), follows a 4-year rotational cycle, with each harvest year followed by 3 fallow years across four harvest zones. We analysed reported harvesting effort and catch information, and fishery-independent oyster size composition data collected over 18 years (Feb 2003-Feb 2020), to investigate the sustainability of rotational harvesting. Total harvesting effort and catches declined over the study period, but on average, the number of oysters collected per outing increased. Fewer outings in recent years were attributed to incomplete reporting and a progressive loss of access to harvest sites. Generalised linear mixed models were used to estimate trends in oyster mean size in relation to fishing method (divers and intertidal collectors), harvest zone, 4-year rotational cycles, and months spent in a zone. Oyster mean size increased from north to south along the coast. Oysters caught by divers on newly exploited deeper reefs were initially larger than those caught by intertidal collectors. Mean oyster size decreased monthly during 1-year harvest periods but recovered to pre-harvest size over 3 fallow years. The results confirmed that the current rotational harvest strategy is well-suited to oyster biology and is sustainable at the present level of effort. Improved reporting on harvesting effort and catch are required to verify longer-term spatiotemporal trends in this fishery. More effective stakeholder communication is needed to resolve potential user conflict [ABSTRACT FROM AUTHOR]

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Abstract Records of amputated teleost fish in the aquatic environment are becoming more frequent; however, it is difficult to find the causes of amputation when there is little evidence. For this reason, this study focused on describing the damage and causes of the amputations of two striped corvina Cynoscion reticulatus specimens collected from landing sites of a small-scale fishery in northwestern Mexico, and determining if the damaged organisms could survive in the environment. Specimens were sexed and whole-body radiographs of amputated specimens and of a normal specimen were taken. Morphometric measurements (TL, SL, MDF, BD, HL, and TW) of the amputees and of 54 normal specimens were recorded. The TL of amputees was estimated and compared to that of normal specimens; stomach contents were also analyzed. The first organism was male, it was missing 1 ½ vertebra and had an estimated TL of 36.64 cm; the second was a female, it was missing 3 ½ vertebrae, with an estimated TL of 38.59 cm; both had bite marks, skin regeneration, and scales in the affected area. Stomach analysis showed Engraulidae fish of the Anchoa genus in stomach contents. There were no significant differences in the measurements of the two amputated and 54 normal organisms (p>0.05). Based on this evidence, it was determined that amputated fish could survive, escape from predators, feed, and obtain energy to heal wounds; the amputations were attributed to the bottlenose dolphin Tursiops truncatus, a potential predator of croakers in the study area and other regions.

Fishing is one of the main threats to sea turtles due to the risk of entanglement in lost nets, vessel collision and mortality due to incidental catches. In Brazil, most of the studies regarding fishing interactions with sea turtles are focused on pelagic longline fisheries in the South and Southeast regions. However, their main reproductive areas in Southwest Atlantic RMU occur in Northeast Brazil, which overlaps small-scale coastal gillnet fisheries. Here, we aimed to use ethnobiology and participatory approaches as simple and cost-effective methods to identify areas for sea turtle conservation where impacts from small-scale fisheries are most likely. Expert captains were trained to recording sea turtle sightings during navigations from the landing port to the fishing grounds, informing their folk nomenclatures. By interpolation of environmental data (chlorophyll and bathymetry) and ecological data, we predicted habitats of 3,459.96 km² for Caretta caretta, Chelonia mydas, and Eretmochelys imbricata and fishing zones of 1,087 km² for management in 20 m and 50 m depths. Our results contributes to ongoing discussions of bycatch mitigation for sea turtle species and identification of habitats. We highlights the importance of considering particularities of overlapped areas in marine spatial planning and co-management arrangements.

Worldwide, fisheries have experienced change over time. An excess of exploitation for providing food has led to overfishing and the depletion of fish stocks. However, fishing communities are also part of the cultural heritage and contribute to the attractiveness of coastal areas to tourists. Our aim is to identify if ecosystem service assessments (ESA) can reflect the condition of fisheries and their economic and social aspects. We developed a tailored, expert-based ESA and applied it to two case studies in the eastern German Baltic Sea under different fishery management scenarios. The results show that reducing fishing pressure, actively restoring habitats, and improving their ecological status increase the provision of most ecosystem services. We discuss and conclude that ESAs allow for a holistic view on fisheries that goes beyond the economic importance of fisheries and shows both the interdependence between fisheries and healthy marine ecosystems, and their relevance for coastal communities. Such a holistic view is necessary for a sustainable approach to fisheries management. Our approach is easily transferable to other regions, and can be used to structure discussion on fisheries management scenarios, as well as to track and visualize societal changes. [ABSTRACT FROM AUTHOR]

Global catch rates of sharks and rays from artisanal fisheries are underreported, leading to a lack of data on population status. This forms a major barrier to developing effective management plans, such is the case in Central and West Africa. Over 3 years, we undertook the first systematic quantitative assessment of sharks and rays landed by an artisanal fishery in the Republic of the Congo. During 507 sampling days (mean 14 surveys per month), we recorded 73,268 individuals. These comprised 42 species, of which 81% are considered at an elevated risk of extinction. Landings were dominated by immature individuals, especially for species of conservation concern. Presence of species thought to have largely disappeared from the region such as the African wedgefish (Rhynchobatus luebberti) and smoothback angelshark (Squatina oculata) suggest Congolese waters are a potential stronghold for these species—warranting increased protection. We identified seasonality of catch within years, but not across years. Both inter‐ and intra‐annual trends varied by species, signifying annual fluctuations in catch of each species but consistent catch of all species year‐on‐year. Analysis showed increased catch between the short‐wet and the long‐wet, and the long‐dry seasons (January–February and August–September). Lowest catch was shown to occur during the short‐wet and the short‐dry seasons (October–December), which may provide an opportunity for seasonal closures or gear restrictions. [ABSTRACT FROM AUTHOR]

Small-scale fisheries are cornerstones of wealth, food, and tradition for people throughout the Pacific region. Yet, their governance is plagued by a lack of relevant data. Using data collected from household income and expenditure surveys carried out in 13 Pacific Island Countries and Territories over the last decade, we bring enhanced resolution to these fisheries by describing how households engage in small-scale fishing and accounting the income generated from these activities. We find most households do not actively participate in fishing, and most that do, fish only for subsistence. Over time, however, the rates at which households participate in fishing may be declining. Further, the total income generated through aquatic foods caught for subsistence is nearly double that of foods caught for sale, but on a per household basis fishing for commercial purposes is more lucrative. Differences point to important distinctions in how households engage with and generate income from commercial and subsistence fishing, including where activities are often conducted, and the types of aquatic foods targeted. These distinctions have implications for how livelihoods-focused policies and programmes can be developed to ensure aquatic food systems continue to support Pacific Island communities as the deadline for the Sustainable Development Goals approaches. [ABSTRACT FROM AUTHOR]

Fishery resources overexploitation, together with bycatch and discards, have an impact on marine ecosystems. The adoption of technologically innovative gears is a possible solution to reduce the discard and to enhance the sustainability of fishery, mainly in artisanal fisheries that represent about 80% of the EU Mediterranean fleet. In the perspective of fishery sustainability, it is necessary to study and test alternative gears to the traditional ones, also with collaboration of fishers. In the present study, results of experimental fishing activities carried out in two Mediterranean areas with traditional and innovative gears of small-scale fishing are reported. Thirty-four hauls were carried out to compare the catch of two types of trammel nets: a traditional one and experimental guarding net. Additionally, 12 hauls were carried out to compare collapsible pots and traditional pots. No significant differences were recorded between trammel nets in terms of commercial catch and discard. However, interesting differences in discard composition were recorded, with higher Elasmobranchs presence in trammel nets, including species assessed as critically endangered and vulnerable. The use of trapula pots in place of traditional ones showed a lower discard of specific resources and an advantage for fishers in terms of space occupied on board.

Bycatch is a major global threat to marine megafauna and occurs in nearly all fishing fleets, including small-scale fisheries that use gillnets. Gillnets represent a threat to endangered air-breathing megafauna, who incidentally entangle in bottom-set gillnets and suffocate after being attracted by bait that is secured on fishing gear. We here provide the first evidence that hawksbill turtles feed on trapped fish in gillnets, suggesting that potential prey items trapped in gillnets may act as additional bait, attracting carnivorous sea turtles towards this threat. This overlooked depredating behaviour potentially explains and increases the likelihood of critically endangered hawksbill turtle bycatch in gillnet fisheries, calling for technological and management solutions.

Longlining represents a cost-effective fishing modality for catching tuna, but its use is contentious due to the unintended catch of endangered, threatened, and protected (ETP) species. In 2000, longlining was banned in the Galapagos Marine Reserve, Ecuador. Since then, local small-scale fishers have contested this decision. In contrast, longlining ban supporters argue that this regulation is fundamental for conserving ETP species, despite scientific and anecdotal evidence indicating that its effective implementation is unfeasible. We conducted an online survey to investigate Galapagos residents’ perceptions concerning longlining, its ecological impact, and diverse potential management strategies. Our findings revealed misconceptions about longline fishing, which highlight the need for improved public awareness and education regarding longline fishing practices, their impact on ETP species, and possible solutions to this complex social-ecological problem. Our study also highlights Galapagos residents’ openness to find a solution that addresses both fishers’ livelihoods and the conservation of ETP species. Galapagos residents are receptive to implementing evidence-based solutions, including testing new bycatch mitigation methods and more selective fishing gears, enhancing monitoring and enforcement, and creating market-based incentives that encourage progressive and adaptive improvements in fishing practices. To solve the Galapagos longline controversy, we recommend a holistic, adaptive, and evidence-based approach that encourages stakeholders to engage in open dialogue, fosters cross-sector collaboration, and promotes research, communication, and educational initiatives. By raising awareness through comprehensive, rigorous, and unbiased scientific information, this ecosystem-based management approach aims to ensure the sustainable development of the small-scale tuna fishery, while conserving the Galapagos’ invaluable and unique marine biodiversity.

This paper aims to describe the situation of small-scale fisheries in Puerto Madero, Chiapas, at the beginning of COVID-19 outbreak (2020-2021). Methodologically, it adopts an ethnographic approach that draws on direct contact with local actors and emphasizes their own voices. The first two parts discuss the impacts of sanitary crisis on the Mexican fishing sector and the position adopted by the State, both at the federal level and in the state of Chiapas. The third section develops the case of Puerto Madero, based on empirical information obtained through on-site interviews and observations. It presents narratives that inform about changes in fishing work in the first two years of the pandemic: work incapacity due to coronavirus infection, temporary adoption of biosecurity measures in labor spaces, periodic cessation of work and modification of fishing dynamics. Finally, it reflects on adaptive capacity of small-scale fishery actors in critical times such as those experienced as a result of this global event. [ABSTRACT FROM AUTHOR]

Estuarine and coastal ecosystems act as important habitats for several elasmobranchs. However, little is known about the species, spatial and temporal distribution patterns, and variability in abundance of elasmobranchs occurring in estuaries along the Indian coast. Fishery surveys in Zuari, a tropical estuary on the Arabian Sea coast of India during 2018–2019, yielded 727 individuals of 18 elasmobranchs elasmobranch species from seven families in the small-scale fisheries. The size composition showed that juvenile and sub-adults' life stages dominated the catch. Most taxa were infrequent in the catch and the top five abundant species were Scoliodon laticaudus, Rhizoprionodon acutus, Chiloscyllium arabicum, Pastinachus sephen, Glaucostegus granulatus, and Himantura uarnak, which shared 70% of the total numerical records. The species richness and diversity of elasmobranchs were the highest in the lower reach with a salinity range (25–34 psu) and estuarine mouth width (3–5 km), whereas evenness was maximum in the upper reaches with a salinity range (20–25 psu) and estuarine mouth width (1–2 km). The numerical abundance and diversity of elasmobranchs were markedly high during dry saline phase (673) and very low counts (54) during the wet phase. Thus, a clear seasonal difference was evident in the distribution of elasmobranchs in Zuari estuary. The ecological guild of elasmobranchs in the Zuari estuarine environments can be broadly categorised into non-marine transients (five species) and others as euryhaline generalists (nine species) and estuarine generalists (four species). Spatial maps show the distribution of elasmobranch species in the estuary followed a strong salinity gradient and the lower reaches showed the highest abundance. The study highlighted the importance of conserving the estuaries of the Indian Ocean region which act as shark habitats and are being impacted by urbanisation and climate change, further provides insights into spatial estuarine use by elasmobranchs. [ABSTRACT FROM AUTHOR]

This study examines social, economic, and ecological adaptation strategies for small-scale Hilsa fishers in Bangladesh’s coastal areas in response to the impacts of climate change. The Hilsa fishery and the communities dependent on it are vulnerable to the adverse effects of climate change, making it imperative to adopt mechanisms to cope with its consequences. Using a mixed-method approach, including in-depth interviews, focus group discussions, and a review of secondary resources, this study explores adaptation policies, relevant factors, and aspects of the Hilsa fishing community’s response to climate change. The study finds that climate change poses a significant threat to biodiversity, potentially leading to changes in fish migration systems and declining fish stocks. The Hilsa fishers perceive that addressing climate change requires policies that combat poverty, preserve or restore biodiversity, and enhance ecosystem services simultaneously. The study identifies social adaptation strategies such as risk reduction, social relationships, and participation in adaptation planning. Economic adaptation strategies include alternative livelihood development, aquaculture, and access to credit. The study also suggests that effective ecological adaptation actions include developing climate change knowledge and fishers’ local ecological knowledge, establishing more effective sanctuaries, and developing networks among protected areas. The study concludes that formal adaptation policies should consider fishers’ interests and practices for adaptation, including their knowledge of social, economic, and ecological issues, to address the impacts of climate change on small-scale fishers and their communities.

The clam fishery in northwestern Mexico encompasses the mangrove cockle Anadara tuberculosa. It is extracted manually, at low tides and between the roots of mangroves. Biological samplings were carried out in Estero Las Lajitas, Sinaloa, from May 2021 to April 2022. A total of 661 A. tuberculosa organisms were analyzed, of which 126 were males, were 363 females and 172 were undifferentiated, yielding a statistically different overall sex ratio between females and males (1♀:0.3♂) (X2 = 113.19; p < 0.05). The length–weight relationship showed a potential type (W = 0.0002L3.125) (95% CI 3.027–3.222 for b). To determine the growth of the species, five models were employed: von Bertalanffy, Gompertz, Logistic, Richards, and Gompertz using an oscillatory component (GO). The Akaike Corrected Information Index for Small Samples (AICC) was used. The GO model yielded the lowest AICC (L∞ = 80.98 mm 95% CI 77.59–84.36, k = 1.02 year−1 95% CI 0.89–1.16), a low growth oscillation intensity (C = 0.03), and slower growth in August (WP = 1.67). The Logistic and Gompertz models were used to calculate the size-at-maturity (L50%). Gompertz obtained the lowest AICC with L50% = 32.53 mm (95% CI 30.67–34.31). Considering the lack of biological information and the parameters generated in the present investigation, as regards A. tuberculosa on the coast of Sinaloa, Mexico, its dissemination is essential for the adequate management of the fishery.

This study presents some exotic fish diversity and catch per unit effort values of exotic fish from gillnet fishery along the southern Aegean Sea. Lessepsian puffer fish (Lagocephalus sceleratus), lionfish (Pterois miles), squirrelfish (Sargocentron rubrum), rabbitfish (Siganus sp.) and a blue crab (Portunus segnis) were caught in the Aegean Sea. Rabbitfish and blue crab sell in the fish markets. Seasonally, the average CPUE of exotic fish was calculated to be 0.7 ± 0.3 kg.1000 m-1 in autumn in catch. This value indicated that it was 72 times lesser than the total seasonal CPUE.

Fishers’ local ecological knowledge (LEK) can be used to reconstruct or supplement long-term trends in heavily exploited population or poorly assessed species with low biomass. We used historical memories of small-scale fishers to understand their perceptions of changes in catch trends in marine fisheries over the last 20 years. The study aimed at evaluating how fishers could provide consistent and reliable data on major fish species/groups comparable with official catch data and to explore the potential of increasing their participation in fishery management. We conducted focus group discussions (FGDs) and key informant interviews with experienced fishers and stakeholders, using a structured template related to the catch and effort data. Using FGD data, we systematically compared changes in fish catch rates and effort over time and space. Data were collected on major groups of species that had reasonable landing over time. Overall, the analysis revealed changes in catch rate, monthly landings per landing center, factors that likely influence the catch trends, and the spatial expansion of fisheries. Our study provides insight into species’ abundance over time. Fishers’ LEK shows declining catch rates for major species and groups, but monthly harvests at landing centers have increased over two decades because of increased fishing efforts. Small-scale fishers are catching more fish from deeper waters over time, indicating a geographical expansion and/or development of fisheries beyond traditionally exploited areas. Such expansions of nearshore fisheries may result from the overfishing of nearby areas. On the contrary, this could be viewed as a positive indication of the potential for growth and development of small-scale fisheries in the region, especially in the context of the blue economy. The agreement between official statistics and fishers’ data on species catch trends over time suggests that fishers have a good understanding of their fishing system. This indicates that fishers’ knowledge could be invaluable, especially in data-poor areas. LEK integration into policy and management is thus expected to facilitate the efficient management of small-scale fisheries.

Climate change is altering the functioning of ecosystems and species distribution worldwide, with negative impacts on human activities, including fisheries. The Adriatic Sea is an extremely productive area for fisheries, due to the strong outflow of nutrients from rivers and the periodic mixing of nutrients from the Mediterranean. However, the Adriatic Sea is also a semi-closed basin, where species do not have the ability to move to higher latitudes to avoid warming of the waters. Climate change acts on biodiversity in a variety of ways, such as causing changes in the trophic network—favoring the intake of thermophilic alien species, often in competition with local species—and altering the biological cycles of acclimatized marine species to temperate–cold climates. These problems become critical factors for the survival of species and for fisheries relying on these resources. Within this context, to have estimates of possible modifications of the nektonic community in the near future could be quite useful for preparing adaptation plans. In this paper, using Maximum Entropy models under RCP 4.5 and 8.5 scenarios, we estimated the future habitat suitability for a set of marine nektonic species of different thermal affinity (e.g., cold, temperate and warm species) within GSA17 (Northern and Central Adriatic Sea), among the most productive—and most exploited—areas of the Mediterranean Sea. This study shows how, at the current pace, climate change could modify marine ecosystems to the extent that future habitat suitability will decrease for nearly half of the species considered, with a decrease in landings from 13.5 to 86.9%, depending on the scenario. Only for the blue crab Callinectes sapidus has an increase in habitat suitability been observed. For most of the species considered, temperature was the most important variable to explain the probability of relative presence within the GSA17. On the other hand, GSA17 climatic conditions in the near future under the tested scenarios could become a suitable environment for tropical species, which could find here a suitable habitat, at least in terms of thermal features. Results of the present study can help the management of fishery resources and local markets in the near future, providing information to predict changes in the composition of the aquatic community and draw up management plans that take into account the effects of climate change. [ABSTRACT FROM AUTHOR]

Copyright of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Ürünleri Dergisi is the property of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Urunleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Catches of artisanal fishers using a variety of fishing gears were analyzed in the recently filled Soubré Reservoir in southwestern Côte d'Ivoire from August 2019 to July 2021. The length-weight relationship (LWR) and condition factor (K) were estimated for the 33 most abundant fish species. To estimate the parameters of these relationships, 8,194 specimens representing 14 families were used. Fish sizes ranged from 5.4 cm SL (8 g body weight) in Brycinus imberi (Peters, 1852) to 107.5 cm SL (14,500 g body weight) in Lates niloticus (Linnaeus, 1758). The allometric coefficient (b) of the LWR showed a range from 2.5 for Mormyrops anguilloides (Linnaeus, 1758) to 3.22 for B. imberi (Peters, 1852), with a mean value of 2.88. The median and modal values of b were 2.91 and 2.64, respectively. The r2 value ranged from 0.87 in Petrocephalus bovei to 0.99 in Heterotis niloticus (Linnaeus, 1758). The condition coefficient (K) ranged from 0.7±0.062 (Hepsetus odoe) to 4.14±0.52 (Coptodon zillii). The highest values of the coefficient K were found for three species of the family Cichlidae. Moreover, the value of K for 28 of the species sampled (84%) in Soubré Reservoir was greater than one (1), indicating the wellbeing of the majority of fishes in this water body. In addition, the study provides the first reference regarding the length-weight relationship for Hydrocynus forskahlii (Cuvier, 1819) living in this region. [ABSTRACT FROM AUTHOR]

Risk decisions by fishers are often accompanied by certain or uncertain externalities. However, the consideration of these externalities in their risk decisions has received little attention so far. In this study, we investigate how resource users incorporate certain or uncertain externalities into their risk decisions. We do this by conducting a lab-in-the-field experiment with Ugandan fishers at Lake Victoria. The fishers make a financially relevant risk decision with different levels of certainty about how a risky decision affects the income of a second fisher. In the treatments, a risky decision has either no impact, a possible positive or negative impact, a possible negative or no impact, or a certain negative impact on the other fisher's income. Our results show that fishers take significantly less risk when risky decisions have a certain negative effect on the income of another fisher than when they have no effect and the other fisher receives a fixed income. They also show that risk-taking only increases significantly compared to individual risk decisions when fishers know the other fisher's income but their risk decision has no impact on it. [ABSTRACT FROM AUTHOR]

Marine fish are good source of essential macro- and micronutrients and major food items in coastal areas in Bangladesh. However, there is no review that details the nutritional value of marine fish in Bangladesh. Therefore, this review focuses on the nutrient composition of marine fish in Bangladesh and how the marine fish can address common nutrient deficiencies among women and children. Nutrient composition data was collected through literature searching in databases and source, including PubMed, Web of Science, Google Scholar, ScienceDirect, WorldFish, and Bangladesh-based database Banglajol. Calculation was carried out to present how one serving marine fish could potentially meet the daily requirement of protein, iron, zinc, calcium, vitamin A, and docosahexaenoic acid (DHA) for pregnant and lactating women and children aged 6–23 months. A total of 97 entries covering nutrient composition analysis of 67 individual fish species were extracted from 12 articles published between 1993 and 2020. Included articles contained analysis of proximate composition, vitamins, minerals, fatty acids, and amino acid. Twelve minerals and nine vitamins were analyzed and reported. The average energy, protein, fat, and ash content per 100 g edible raw marine fish was 343.58 kJ, 16.76 g, 4.16 g, and 2.22 g, respectively. According to available data, marine fish are good sources of protein, zinc, calcium, and DHA. Pelagic small fish, which are mainly captured by artisanal small-scale fishers, had more nutritional value than other categories of fish. Furthermore, marine small fish were found more nutritious than commonly consumed freshwater fish types in Bangladesh, including major carps, introduced carps, and tilapia. Therefore, the study concludes that marine fish have high potential to address malnutrition in Bangladesh. There was scarcity of literature regarding the nutrient composition of marine fish in Bangladesh and in South Asia as a whole, so more comprehensive quality research in this area is recommended.

Saint-Pierre and Miquelon (SPM) is a French territory located in the North Atlantic. As in the province of Newfoundland and Labrador (Canada), the fishery of the Atlantic cod (Gadus morhua Linnaeus, 1758) was the raison d'être of this small archipelago of about 6,000 inhabitants. At its peak, the fishing sector employed on average 140 fishers and 300 persons. With the collapse of the Northern cod stocks and subsequent moratorium in the early 1990s, soon followed by the international court decision allocating a very small Exclusive Economic Zone to SPM, both the SPM's artisanal and industrial fishing fleets and fish processing plants were dismantled. Today, SPM lives mainly on a public sector employing about half of the labour force and funded from the French mainland. The background of the changes is presented, along with an argument for the development of a sustainable primary sector in SPM, which would be focused on fisheries, and the aquaculture production of high-value species, and the resulting export of high-end products. [ABSTRACT FROM AUTHOR]

The small-scale trammel net fisheries are essential to the economy and well-being of coastal communities in the Yellow Sea, China. However, these fisheries are low efficient and urgently demand technical innovations to improve catch rates. In this study, we conducted field experiments in three traditional fishing grounds (Rizhao, Yantai, and Weihai) to test whether the addition of different colored light-emitting diodes (LEDs) fishing lights in the trammel nets could improve the catch rates of seven commercial species. Results showed that the effects of LEDs on catch rates were species-specific. Green LEDs could significantly increase the catch per unit effort (CPUE) of black rockfish (Sebastes schlegelii), fat greenling (Hexagrammos otakii), marbled flounder (Pseudopleuronectes yokohamae), stone flounder (Platichthys bicoloratus), Asian paddle crab (Charybdis japonica), and mantis shrimp (Oratosquilla oratoria) by 40%-72% compared with unilluminated nets, while had no significant effect on the catch rates of swimming crab (Portunus trituberculatus). Red LEDs harvested 58%-86% higher CPUE of fat greenling, marbled flounder, stone flounder, mantis shrimp, and swimming crab while catching fewer black rockfish and Asian paddle crab. Blue and white LEDs exhibited similar performance, which could significantly capture more black rockfish, fat greenling, and mantis shrimp and did not affect the catch rates of other species. The effects of LEDs were also size-dependent for certain species, and the catch rates generally increased with the length classes. Taking economic benefits into consideration, the green and red LEDs provided the highest profitability for Rizhao, while green LEDs performed best in Weihai and Yantai. This study is the first investigation on how artificial lights affected the catch rates of trammel nets. The findings of our study illustrated that trammel nets equipped with LEDs could serve as a viable fishing strategy in small-scale trammel net fisheries.

Abstract Fishing for serra Spanish mackerel takes place along the Brazilian coast. Studies in northern and northeastern regions show that has socioeconomic importance although risk of overexploitation. This article provides an assessment of fisheries in the southeastern and southern regions, where there is a gap in knowledge. To build a regional perspective, fishing monitoring data from Santa Catarina, Rio de Janeiro, São Paulo and Paraná were used. For more detailed analyses, data from São Paulo and Paraná were chosen. In these two states, census data were collected on the species and quantities caught, fishing gear used and sales value. This fishery, mostly artisanal, has socioeconomic importance. Santa Catarina has the largest production. However, Rio de Janeiro has the most significant industrial fishery. São Paulo and Paraná produces approximately 110 t/year, mainly using drift gillnets and encircling gillnets with a mesh size of 10 to 12 cm between knots. The harvest period is during the cooler months, between May and August for São Paulo and between June and September for Paraná. The ANOVA test did not show any significant variations in CPUE, thus indicating stability. The results reinforce the need for adequate management.

The set-net fishery resources in Haizhou Bay, China have been over-exploited because of overfishing and environmental deterioration. To better understand the current situations and the development trends of fishery resources, the temporal change of biological characteristics and community compositions were analyzed from 2011 to 2018. Meanwhile, we evaluated the impact of the summer moratorium of marine fishing (SMMF) on the set-net fishery. Results show that the mean total length of the six principal species showed varying degrees of decreasing trends, while the changing patterns for the mean weight proportion of the six groups varied. For the whole communities, the similarities of the inter-annual community diversities and compositions were high. SMMF is meaningful to help reproductive success and support recruitment. Every year, the catch per unit efforts of the six principal species after SMMF were significantly higher than before SMMF except for Octopus ocellatus. The target groups showed a higher mean weight proportion after SMMF than before SMMF in eight years, while the non-target groups were converse. Therefore, the resources of the set-net fishery are changing in the study periods; and SMMF is an important factor influencing biological characteristics and community structure. Despite some challenges, SMMF is still one of the most appropriate policy tools to protect the set-net fishery resources under the reality of China. [ABSTRACT FROM AUTHOR]

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The COVID-19 pandemic and response has significantly disrupted fishery supply chains, creating shortages of essential foods and constraining livelihoods globally. Small-scale fisheries (SSFs) are responding to the pandemic in a variety of ways. Together, disruptions from and responses to COVID-19 illuminate existing vulnerabilities in the fish distribution paradigm and possible means of reducing system and actor sensitivity and exposure and increasing adaptive capacity. Integrating concepts from literature on supply chain disruptions, social-ecological systems, human wellbeing, vulnerability, and SSFs, we synthesize preliminary lessons from six case studies from Indonesia, the Philippines, Peru, Canada, and the United States. The SSF supply chains examined employ different distribution strategies and operate in different geographic, political, social, economic, and cultural contexts. Specifically, we ask (a) how resilient have different SSF supply chains been to COVID-19 impacts; (b) what do these initial outcomes indicate about the role of distribution strategies in determining the vulnerability of SSF supply chains to macroeconomic shocks; and (c) what key factors have shaped this vulnerability? Based on our findings, systemic changes that may reduce SSF vulnerability to future macroeconomic shocks include: diversification of distribution strategies, livelihoods, and products; development of local and domestic markets and distribution channels; reduced reliance on international markets; establishment of effective communication channels; and preparation for providing aid to directly assist supply chains and support consumer purchasing power. [ABSTRACT FROM AUTHOR]

Purpose: Common octopus is the fishing species with highest economic revenue in Portugal, and its consumption per capita is very high. The majority of catches come from the small-scale fleet with pots and traps. The aims were to assess main environmental impacts of common octopus' fishery with traps and pots in the Algarve region, where the most important fleet size and landings volume occurs, and to find if there are significant differences between both fishing gears. Methods: The assessment includes standard LCA impact categories, fishery-specific impact categories, and quantification of macroplastics and microplastics emitted to the environment. The functional unit selected was 1 kg of octopus and the study was a 'cradle to gate' system. The scope included fishing operations until the product is landed at the harbour. Primary data was obtained by face-to-face questionnaires from 22 vessels, with an average of 1005 pots and 1211 traps per vessel, and 372 pots and 234 traps lost annually to the environment. Plastic pots have a concrete block and traps are a metal framed covered by plastic netting. Each trap or pot is connected to the main line at regular intervals. Unlike traps, pots do not need bait. Results and discussion: Fuel contribution to global warming is very high and where the highest potential exists to lower down the carbon footprint. The fuel use intensity resulted in 0.9 L/kg of octopus. The bait used in traps is significant and raises further environmental costs related with fuel consumption. The use of traps represents more than two times the impacts found for pots in all the categories studied except ecotoxicity categories. Zinc use was the main contributor to ecotoxicity categories, but it has not been included in other fishery LCA studies. It was estimated that 12.2 g of plastics is lost to the environment per kg of octopus. The loss of macroplastics from fishing gears was the highest contributor. Conclusions: The carbon footprint obtained was 3.1 kg CO2 eq per kg of octopus, being lower compared to other seafood products, and less than half compared to octopus caught with trawling. Pots and traps are highly selective fishing gears, causing negligible disturbance to the seafloor. The stock is not assessed, but management measures exist and can be improved. A drawback exists related with gears lost to the environment. [ABSTRACT FROM AUTHOR]

A fishery encompasses various interconnected systems, including ecological, socioeconomic, and governing systems. Managing fisheries requires the simultaneous consideration of all these systems, making it a challenging endeavor. To address these challenges, fisheries bioeconomic models have emerged as a crucial tool. They are particularly valuable in the context of small-scale fisheries, which are often complex, overlooked and poorly understood. Thus, this paper presents a dynamic multispecies and multigear bioeconomic model that can illuminate the ecological, economic, and social dimensions of small-scale fisheries under different management scenarios. The model was applied to a small-scale fisheries system in Southern Brazil that has as a notable feature a cooperative fishing behavior between dolphins and fishers. Three scenarios were explored: the base scenario (status quo), the optimal management scenario, and the constrained optimal management scenario. The model outputs demonstrated a clear tradeoff between labour effort, species conservation, and economic rent. Shifting from the base to an optimal management scenario would result in a labour employment reduction within the system but concurrently yield higher stock levels, economic rent, and wages. These results illustrate how our model can explore critical management scenarios across the multiple dimensions of fisheries systems. In essence, this research offers a novel contribution in the form of a bioeconomic model tailored for small-scale fisheries involving multiple species. • Trade-off between labour effort, species conservation, and economic rent was found • Optimal management reduce labour employment but yield higher stock levels • Model can explore management scenarios across multiple dimensions of systems [ABSTRACT FROM AUTHOR]

In the last few decades, there has been growing scholarly interest about the implications of women's increased economic role on household decision-making dynamics. Contributing to these conversations, the current paper examines couples (wives and husbands) perceptions and attitudes towards women's decision-making power in the context of Ghana's small-scale fishery where both couples engage in the same economic activity, performing different, but complementary roles. The study involved interviews with 20 and 18 married female and male fisherfolk respectively, which was part of a larger study by the first author among fisherfolk in the south-western coast of Ghana. We show that accounts of perceived decision-making power of women varied by spouse. Using a gender lens, we show how both women and men discursively reproduced and challenged hegemonic gender discourses and relations in different contexts. We argue that exploring the gaps in couples' account of women's household decision-making power as well as their perceptions and attitudes towards such roles provides important ground to understanding the inconsistencies in the outcomes of programs targeted at women empowerment and gender equality. [ABSTRACT FROM AUTHOR]

A mangrove ecosystem encompasses two environments, a larger flooding area with a characteristic wetland forest, and a less flooded area, more saline with little or no vegetation cover, known as hypersaline tidal flats (apicuns). Cardisoma guanhumi is a non-abundant, semi-terrestrial crab that lives mainly in apicuns. This environment is smaller and less impacted in comparison with mangrove forests. This study aims to investigate the spatial relation between apicuns and mangroves as a habitat extent of C. guanhumi along the Brazilian coast and its implications on fishery management and conservation status of this species in Brazil. The study was based on apicum and mangrove extent maps of the Brazilian coast. The maps were analyzed based on variations in latitude and environmental and socio-political aspects. Along the Brazilian coast, we found 11,721 km2 of mangroves and 402 km2 of apicuns. The habitat of C. guanhumi varied greatly with latitude and is interdependent of mangrove ecosystem. This latitudinal gradient and the apicum-mangrove relation suggest the need for different management strategies of this fishery species along the Brazilian coast. Such strategies should be used to maintain the population of C. guanhumi in sizes that guarantee its conservation and recovery aiming to remove this species from the category of vulnerable in the Brazilian red list of threatened species. [ABSTRACT FROM AUTHOR]

Copyright of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Ürünleri Dergisi is the property of Ege Journal of Fisheries & Aquatic Sciences (EgeJFAS) / Su Urunleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In Cambodia, fishery co-management is an important process to transfer authority and ownership to the communities along the Tonle Sap Lake to manage fishery. This paper aims to determine why the co-management of small-scale fishery has not been implemented satisfactorily in the Tonle Sap Lake of Cambodia. The research was primarily based on a household survey among 404 households for quantitative data, equally divided between the Cham (202 households) and Khmer (202 households). Participatory process was also applied to collect qualitative data from key stakeholders. We found that limited interaction among the involved stakeholders, i.e., unequal distribution of authority and resources co-management, has impeded implementation. The engagement of fisherfolk was influenced by dependence on fishery, law enforcement, and events organized by the communities. While the Khmer had better opportunities to participate in planning at the provincial and district levels, the Cham were only engaged in local development activities initiated by their people. However, the latter evinced a higher rate of satisfaction due to their access to fishery resources and to a large quantity of fishing gear. In the future, efforts should be made to: (1) improve resource and authority sharing among all key stakeholders; (2) urgently resolve issues pertinent to capacity building, insufficient budgets for commune councils (CoCs) and community fishery (CFi); and (3) urge law enforcement regarding illegal fishing.

Artisanal fisheries are essential, but for most the status of the stock supporting the fishing activity remains unknown due to lack of data and difficult access to sampling. For example, the artisanal fishery of sea silverside Odontesthes (Austromenidia) regia, in the Los Lagos administrative region of Chile, requires a data-limited approach to determine its status because the fishery administration has not invested in its monitoring. The approach consisted of estimating the spawning potential ratio (SPR) from length-frequency data collected in 2019 using length-based spawning potential ratio (LBSPR) and biological reference points using the only-catch optimized method (OCOM) to catch data covering from 1960 to 2020. In addition, five age-structured sea silverside populations were simulated considering uncertainty in recruitment and utilizing life-history parameters estimated by FishLife. According to LBSPR, the SPR was 0.58 (95% confidence intervals: 0.5-0.7), suggesting a fully exploited fishery status. The OCOM result was inconsistent with the life-history parameters and was discarded as a valid sea silverside stock assessment. The age-structured population simulations indicated evidence of a reduction in the spawning stock biomass close to 75% of the unexploited condition in 1960. Thus, the underexploited status reached a probability close to 49.4%, and the fully exploited status was 41.2%. The framework for a data-limited stock-assessment approach and results obtained here for the sea silverside are starting essential steps that may be emulated in other artisanal data-limited fisheries.

Market‐based fisheries management systems give incentives to reduce the fleet size and employment, which increases earnings and contributes to resolve the tragedy of the commons. However, the often‐stated expectation that economies of scale cause the disappearance of small‐scale fishery is not observed in many cases. In this study, we investigate the effects on fleet structure in the period after introducing individual fishing quotas or individual fishing days with various degrees of transferability in selected fisheries in the seven Nordic countries. Despite observing economies of scale in most cases, it is found that the market‐based fisheries management often does not reduce the small‐scale fleet more than the fleet of large vessels. This is explained partly by small vessels targeting demersal species and large vessels pelagic species, and partly by the larger need of larger than small vessels to continuously utilize their capital stocks through fast adaptation to ensure return. A more important explanation is the regulation design, with limitations in sale of fishing rights and lease between vessel groups and regions and in the share of the total quota holdings of fishing rights by individuals and vessels. This is important for countries considering the introduction of market‐based fisheries management, since the Nordic experiences show that with proper regulation design, economic gains can be achieved with small‐scale fishing surviving even under economies of scale. [ABSTRACT FROM AUTHOR]