Search

Your search keyword '"Lejk, Adam M."' showing total 28 results
Start Over Author "Lejk, Adam M."
28 results on '"Lejk, Adam M."'

1. Contracaecum osculatum and Pseudoterranova sp. in the liver of salmon (Salmo salar) from Polish marine waters

Author

Nadolna-Ałtyn Katarzyna, Pawlak Joanna, Podolska Magdalena, and Lejk Adam M.

Subjects
anisakidae, baltic sea, nematodes, Aquaculture. Fisheries. Angling, SH1-691
Abstract

Anisakidae nematodes, especially Contracaecum osculatum, Anisakis simplex, and Pseudoterranova decipiens, have dispersed throughout the Baltic Sea over the last decade. Despite the fact that salmon, Salmo salar, is a popular choice among consumers and therefore one of the most valuable Baltic fish species, information about the level of infection of salmon liver with these zoonotic nematodes is sparse. In 2020, a total of 120 salmon livers were inspected for the presence of parasites showing that 13% of salmon livers were infected with C. osculatum. Furthermore, a single Pseudoterranova sp. larva was detected in one salmon liver, representing a host-parasite system that has never previously been reported in the Baltic Sea.

Published
2023
Full Text
View/download PDF

3. A pan-Baltic assessment of temporal trends in coastal pike populations

Author

Olsson, Jens, Andersson, Matilda L., Bergström, Ulf, Arlinghaus, Robert, Audzijonyte, Asta, Berg, Soren, Briekmane, Laura, Dainys, Justas, Ravn, Henrik Dalby, Droll, Jan, Dziemian, Łukasz, Fey, Dariusz P., van Gemert, Rob, Greszkiewicz, Martyna, Grochowski, Adam, Jakubavičiūtė, Egle, Lozys, Linas, Lejk, Adam M., Mustamäki, Noora, Naddafi, Rahmat, Olin, Mikko, Saks, Lauri, Skov, Christian, Smoliński, Szymon, Svirgsden, Roland, Tiainen, Joni, and Östman, Örjan

Published
2023
Full Text
View/download PDF

5. Acoustic telemetry data on lake-migratory brown trout, Salmo trutta lacustris L., behavior in Lake Hańcza, northeastern Poland, within one year of release

Author

Mierzejewska Katarzyna, Dynowski Piotr, Stańczak Katarzyna, Stabiński Robert, Woźniak Małgorzata, Kozłowski Krzysztof, Lejk Adam M., and Kapusta Andrzej

Subjects
hatchery-reared fish, species restoration, fish telemetry, fish migration, Aquaculture. Fisheries. Angling, SH1-691
Abstract

The poor results of lake-migratory brown trout, Salmo trutta lacustris L., restoration in Lake Hańcza Nature Reserve prompted undertaking the current study that sought to verify if hatchery-reared fish age 2+ can survive the critical period of acclimation and remain in the lake. Thirty-one individuals were tagged with coded acoustic transmitters and observed for 317 days. This method helped to analyze: 1) the spatial behavior of tagged fish for one year following their release; 2) the possible differences in the behavior of fish released in various places habitually used for stocking. By the end of study, 6.5–12.9% of the tagged fish remained in the lake. The most interesting phenomenon the data indicated was the trout behavior in late spring and early summer, when the fish moved vigorously along the longitudinal axis of the lake continuously for several weeks. The reasons for the fish movements observed in Lake Hańcza were not clear. For this unique species/population it is important to determine whether such behavior is typical of this fish also in other water bodies and if it is only seen in hatchery-reared fish aged 2+ and 3+.

Published
2022
Full Text
View/download PDF

6. Interacting effects of density and temperature on growth of wild and hatchery young‐of‐the‐year anadromous brown trout (Salmo trutta L.).

Author

Lejk, Adam M., Smoliński, Szymon, Łaszewski, Maksym, and Radtke, Grzegorz

Abstract

Stocking can affect population density but may influence fish growth responses to changes in environmental conditions. In a multi‐year field experiment, we investigated the interactive effects of density and temperature on the growth of young‐of‐the‐year anadromous brown trout in streams stocked with wild‐origin hatchery‐reared brown trout. Fish origin was the predominant factor influencing growth rate, thereby highlighting the importance of discriminating between wild and hatchery‐reared individuals. Growth was positively related to temperature (degree‐days) and negatively related to density, with the growth response to temperature modulated by density. Temperature had a more pronounced effect on juvenile growth at low density than at high density. The reduced growth response to temperature caused by density could reduce population resilience and should be considered in management and conservation strategies. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

7. Daily deposition of growth increments in sagittae and lapilli of laboratory-reared larval northern pike (Esox lucius)

Author

Fey, Dariusz P., Lejk, Adam M., and Greszkiewicz, Martyna

Subjects
Northern pike -- Observations -- Physiological aspects, Otolith organs -- Observations, Fishery research, Fishes, Zoology and wildlife conservation
Abstract

Abstract--The daily deposition of growth increments within both sagittae and lapilli was validated for known-age laboratory-reared (18[degrees]C) larval northern pike (Esox lucius) (9-33 mm in standard length [SL]) sampled 1, [...]

Published
2018
Full Text
View/download PDF

11. Primeira avaliação dos impactos da pandemia COVID-19 sobre pesca recreativa marinha global

Author

Pita, Pablo, Ainsworth, Gillian B., Alba, Bernardino, Anderson, Antônio B., Antelo, Manel, Alós, Josep, Artetxe, Iñaki, Baudrier, Jérôme, Castro, José J., Chicharro, Belén, Erzini, K, Ferter, Keno, Freitas, Mafalda, García-de-la-Fuente, Laura, García-Charton, José A., Giménez-Casalduero, María, Grau, Antoni M., Diogo, Hugo, Gordoa, Ana, Henriques, Filipe, Hyder, Kieran, Jiménez-Alvarado, David, Karachle, Paraskevi K., Lloret, Josep, Laporta, Martin, Lejk, Adam M., Dedeu, Arnau L., Martín-Sosa, Pablo, Martínez, Lllibori, Mira, Antoni M., Morales-Nin, Beatriz, Mugerza, Estanis, Olesen, Hans J., Papadopoulos, Anastasios, Pontes, João, Pascual-Fernández, José J., Purroy, Ariadna, Ramires, Milena, Rangel, Mafalda, Reis-Filho, José Amorim, Sánchez-Lizaso, Jose L., Sandoval, Virginia, Sbragaglia, Valerio, Silva, Luis, Skov, Christian, Sola, Iván, Strehlow, Harry V., Torres, María A., Ustups, Didzis, van der Hammen, Tessa, Veiga, Pedro, Venerus, Leonardo A., Verleye, Thomas, Villasante, Sebastián, Weltersbach, Marc Simon, and Zarauz, Lucía

Subjects
Leisure activities, Expert knowledge, Fishery surveys, Virus outbreak, Fishers’ profiles
Abstract

In late 2019, an outbreak caused by a novel coronavirus started in China (Graham and Baric, 2020; Hu et al., 2020; Maxmen, 2021). A global pandemic was declared in March 2020, as COVID-19, the disease caused by the coronavirus (World Health Organization, 2020b), escalated outside China (World Health Organization, 2020a). In mid-2021, when vaccination campaigns began to show positive effects on the control of the disease in several countries (Kaur and Gupta, 2020), the COVID-19 pandemic caused millions of deaths and hundreds of millions of infections (Dong et al., 2020). To fight the pandemic, governments reacted with measures designed to contain the spread of the virus, especially through measures aimed to reduce social interactions, including lockdowns (Wilder-Smith and Freedman, 2020), travel restrictions (Chinazzi et al., 2020), and limiting people’s access to non-essential activities (Storr et al., 2021). Humanity suffered a notable impact as a result of the pandemic, including losses of jobs and an abrupt disruption in global demand of goods and services (Barua, 2020; McKibbin and Fernando, 2020; Nicola et al., 2020). The pandemic further degraded the quality of life of the most vulnerable people, particularly those with mental health problems (Brooks et al., 2020), victims of domestic violence (Usher et al., 2020), children (Singh et al., 2020), or indigenous populations (Lane, 2020). As a result, an increase in economic inequality and worldwide poverty is expected, especially in developing countries (World Bank, 2020), and a peak in the suicide rate (Kawohl and Nordt, 2020). On the other hand, global reduction of human activities has had some positive effects on the global environment, especially for air and water quality (Rutz et al., 2020), and noise reduction (Zambrano-Monserrate et al., 2020). Marine ecosystems for example experienced less impacts derived from commercial fishing due to disruptions in large markets such as the United States (White et al., 2021a) or the European Union (Prellezo and Carvahlo, 2020; Coll et al., 2021). info:eu-repo/semantics/publishedVersion

Published
2021

12. First Assessment of the Impacts of the COVID-19 Pandemic on Global Marine Recreational Fisheries

Author

Pita, Pablo, primary, Ainsworth, Gillian B., additional, Alba, Bernardino, additional, Anderson, Antônio B., additional, Antelo, Manel, additional, Alós, Josep, additional, Artetxe, Iñaki, additional, Baudrier, Jérôme, additional, Castro, José J., additional, Chicharro, Belén, additional, Erzini, Karim, additional, Ferter, Keno, additional, Freitas, Mafalda, additional, García-de-la-Fuente, Laura, additional, García-Charton, José A., additional, Giménez-Casalduero, María, additional, Grau, Antoni M., additional, Diogo, Hugo, additional, Gordoa, Ana, additional, Henriques, Filipe, additional, Hyder, Kieran, additional, Jiménez-Alvarado, David, additional, Karachle, Paraskevi K., additional, Lloret, Josep, additional, Laporta, Martin, additional, Lejk, Adam M., additional, Dedeu, Arnau L., additional, Martín-Sosa, Pablo, additional, Martínez, Lllibori, additional, Mira, Antoni M., additional, Morales-Nin, Beatriz, additional, Mugerza, Estanis, additional, Olesen, Hans J., additional, Papadopoulos, Anastasios, additional, Pontes, João, additional, Pascual-Fernández, José J., additional, Purroy, Ariadna, additional, Ramires, Milena, additional, Rangel, Mafalda, additional, Reis-Filho, José Amorim, additional, Sánchez-Lizaso, Jose L., additional, Sandoval, Virginia, additional, Sbragaglia, Valerio, additional, Silva, Luis, additional, Skov, Christian, additional, Sola, Iván, additional, Strehlow, Harry V., additional, Torres, María A., additional, Ustups, Didzis, additional, van der Hammen, Tessa, additional, Veiga, Pedro, additional, Venerus, Leonardo A., additional, Verleye, Thomas, additional, Villasante, Sebastián, additional, Weltersbach, Marc Simon, additional, and Zarauz, Lucía, additional

Published
2021
Full Text
View/download PDF

13. Contracaecum osculatumand Pseudoterranovasp. in the liver of salmon (Salmo salar) from Polish marine waters

Author

Nadolna-Ałtyn, Katarzyna, Pawlak, Joanna, Podolska, Magdalena, and Lejk, Adam M.

Abstract

Anisakidae nematodes, especially Contracaecum osculatum, Anisakis simplex, and Pseudoterranova decipiens,have dispersed throughout the Baltic Sea over the last decade. Despite the fact that salmon, Salmo salar, is a popular choice among consumers and therefore one of the most valuable Baltic fish species, information about the level of infection of salmon liver with these zoonotic nematodes is sparse. In 2020, a total of 120 salmon livers were inspected for the presence of parasites showing that 13% of salmon livers were infected with C. osculatum. Furthermore, a single Pseudoterranovasp. larva was detected in one salmon liver, representing a host-parasite system that has never previously been reported in the Baltic Sea.

Published
2023
Full Text
View/download PDF

15. First Assessment of the Impacts of the COVID-19 Pandemic on Global Marine Recreational Fisheries

Author

Pita, Pablo, Ainsworth, Gillian B., Alba, Bernardino, Anderson, Antônio B., Antelo, Manel, Alós, Josep, Artetxe, Iñaki, Baudrier, Jerome, Castro, José J., Chicharro, Belén, Erzini, Karim, Ferter, Keno, Freitas, Mafalda, García-de-la-fuente, Laura, García-charton, José A., Giménez-casalduero, María, Grau, Antoni M., Diogo, Hugo, Gordoa, Ana, Henriques, Filipe, Hyder, Kieran, Jiménez-alvarado, David, Karachle, Paraskevi K., Lloret, Josep, Laporta, Martin, Lejk, Adam M., Dedeu, Arnau L., Martín-sosa, Pablo, Martínez, Lllibori, Mira, Antoni M., Morales-nin, Beatriz, Mugerza, Estanis, Olesen, Hans J., Papadopoulos, Anastasios, Pontes, João, Pascual-fernández, José J., Purroy, Ariadna, Ramires, Milena, Rangel, Mafalda, Reis-filho, José Amorim, Sánchez-lizaso, Jose L., Sandoval, Virginia, Sbragaglia, Valerio, Silva, Luis, Skov, Christian, Sola, Iván, Strehlow, Harry V., Torres, María A., Ustups, Didzis, Van Der Hammen, Tessa, Veiga, Pedro, Venerus, Leonardo A., Verleye, Thomas, Villasante, Sebastián, Weltersbach, Marc Simon, Zarauz, Lucía, Pita, Pablo, Ainsworth, Gillian B., Alba, Bernardino, Anderson, Antônio B., Antelo, Manel, Alós, Josep, Artetxe, Iñaki, Baudrier, Jerome, Castro, José J., Chicharro, Belén, Erzini, Karim, Ferter, Keno, Freitas, Mafalda, García-de-la-fuente, Laura, García-charton, José A., Giménez-casalduero, María, Grau, Antoni M., Diogo, Hugo, Gordoa, Ana, Henriques, Filipe, Hyder, Kieran, Jiménez-alvarado, David, Karachle, Paraskevi K., Lloret, Josep, Laporta, Martin, Lejk, Adam M., Dedeu, Arnau L., Martín-sosa, Pablo, Martínez, Lllibori, Mira, Antoni M., Morales-nin, Beatriz, Mugerza, Estanis, Olesen, Hans J., Papadopoulos, Anastasios, Pontes, João, Pascual-fernández, José J., Purroy, Ariadna, Ramires, Milena, Rangel, Mafalda, Reis-filho, José Amorim, Sánchez-lizaso, Jose L., Sandoval, Virginia, Sbragaglia, Valerio, Silva, Luis, Skov, Christian, Sola, Iván, Strehlow, Harry V., Torres, María A., Ustups, Didzis, Van Der Hammen, Tessa, Veiga, Pedro, Venerus, Leonardo A., Verleye, Thomas, Villasante, Sebastián, Weltersbach, Marc Simon, and Zarauz, Lucía

Abstract

This work is the result of an international research effort to determine the main impacts of the COVID-19 pandemic on marine recreational fishing. Changes were assessed on (1) access to fishing, derived from lockdowns and other mobility restrictions; (2) ecosystems, because of alterations in fishing intensity and human presence; (3) the blue economy, derived from alterations in the investments and expenses of the fishers; and (4) society, in relation to variations in fishers’ health and well-being. For this, a consultation with experts from 16 countries was carried out, as well as an international online survey aimed at recreational fishers, that included specific questions designed to capture fishers’ heterogeneity in relation to behavior, skills and know-how, and vital involvement. Fishers’ participation in the online survey (5,998 recreational fishers in 15 countries) was promoted through a marketing campaign. The sensitivity of the fishers’ clustering procedure, based on the captured heterogeneity, was evaluated by SIMPER analysis and by generalized linear models. Results from the expert consultation highlighted a worldwide reduction in marine recreational fishing activity. Lower human-driven pressures are expected to generate some benefits for marine ecosystems. However, experts also identified high negative impacts on the blue economy, as well as on fisher health and well-being because of the loss of recreational fishing opportunities. Most (98%) of the fishers who participated in the online survey were identified as advanced, showing a much higher degree of commitment to recreational fishing than basic fishers (2%). Advanced fishers were, in general, more pessimistic about the impacts of COVID-19, reporting higher reductions in physical activity and fish consumption, as well as poorer quality of night rest, foul mood, and raised more concerns about their health status. Controlled and safe access to marine recreational fisheries during pandemics would provide

Published
2021
Full Text
View/download PDF

16. First Assessment of the Impacts of the COVID-19 Pandemic on Global Marine Recreational Fisheries

Author

Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Pita, Pablo, Ainsworth, Gillian B., Alba, Bernardino, Anderson, Antônio B., Antelo, Manel, Alós, Josep, Artetxe, Iñaki, Baudrier, Jérôme, Castro, José J., Chicharro, Belén, Erzini, Karim, Ferter, Keno, Freitas, Mafalda, García-de-la-Fuente, Laura, García-Charton, José Antonio, Giménez Casalduero, María, Grau, Antoni M., Diogo, Hugo, Gordoa, Ana, Henriques, Filipe, Hyder, Kieran, Jiménez-Alvarado, David, Karachle, Paraskevi K., Lloret, Josep, Laporta, Martin, Lejk, Adam M., Dedeu, Arnau L., Martín-Sosa, Pablo, Martínez, Lllibori, Mira, Antoni M., Morales-Nin, Beatriz, Mugerza, Estanis, Olesen, Hans J., Papadopoulos, Anastasios, Pontes, João, Pascual-Fernández, José J., Purroy, Ariadna, Ramires, Milena, Rangel, Mafalda, Reis-Filho, José Amorim, Sánchez-Lizaso, José Luis, Sandoval, Virginia, Sbragaglia, Valerio, Silva, Luis, Skov, Christian, Sola Macia, Iván, Strehlow, Harry V., Torres, María A., Ustups, Didzis, van der Hammen, Tessa, Veiga, Pedro, Venerus, Leonardo A., Verleye, Thomas, Villasante, Sebastián, Weltersbach, Marc Simon, Zarauz, Lucía, Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada, Pita, Pablo, Ainsworth, Gillian B., Alba, Bernardino, Anderson, Antônio B., Antelo, Manel, Alós, Josep, Artetxe, Iñaki, Baudrier, Jérôme, Castro, José J., Chicharro, Belén, Erzini, Karim, Ferter, Keno, Freitas, Mafalda, García-de-la-Fuente, Laura, García-Charton, José Antonio, Giménez Casalduero, María, Grau, Antoni M., Diogo, Hugo, Gordoa, Ana, Henriques, Filipe, Hyder, Kieran, Jiménez-Alvarado, David, Karachle, Paraskevi K., Lloret, Josep, Laporta, Martin, Lejk, Adam M., Dedeu, Arnau L., Martín-Sosa, Pablo, Martínez, Lllibori, Mira, Antoni M., Morales-Nin, Beatriz, Mugerza, Estanis, Olesen, Hans J., Papadopoulos, Anastasios, Pontes, João, Pascual-Fernández, José J., Purroy, Ariadna, Ramires, Milena, Rangel, Mafalda, Reis-Filho, José Amorim, Sánchez-Lizaso, José Luis, Sandoval, Virginia, Sbragaglia, Valerio, Silva, Luis, Skov, Christian, Sola Macia, Iván, Strehlow, Harry V., Torres, María A., Ustups, Didzis, van der Hammen, Tessa, Veiga, Pedro, Venerus, Leonardo A., Verleye, Thomas, Villasante, Sebastián, Weltersbach, Marc Simon, and Zarauz, Lucía

Abstract

This work is the result of an international research effort to determine the main impacts of the COVID-19 pandemic on marine recreational fishing. Changes were assessed on (1) access to fishing, derived from lockdowns and other mobility restrictions; (2) ecosystems, because of alterations in fishing intensity and human presence; (3) the blue economy, derived from alterations in the investments and expenses of the fishers; and (4) society, in relation to variations in fishers’ health and well-being. For this, a consultation with experts from 16 countries was carried out, as well as an international online survey aimed at recreational fishers, that included specific questions designed to capture fishers’ heterogeneity in relation to behavior, skills and know-how, and vital involvement. Fishers’ participation in the online survey (5,998 recreational fishers in 15 countries) was promoted through a marketing campaign. The sensitivity of the fishers’ clustering procedure, based on the captured heterogeneity, was evaluated by SIMPER analysis and by generalized linear models. Results from the expert consultation highlighted a worldwide reduction in marine recreational fishing activity. Lower human-driven pressures are expected to generate some benefits for marine ecosystems. However, experts also identified high negative impacts on the blue economy, as well as on fisher health and well-being because of the loss of recreational fishing opportunities. Most (98%) of the fishers who participated in the online survey were identified as advanced, showing a much higher degree of commitment to recreational fishing than basic fishers (2%). Advanced fishers were, in general, more pessimistic about the impacts of COVID-19, reporting higher reductions in physical activity and fish consumption, as well as poorer quality of night rest, foul mood, and raised more concerns about their health status. Controlled and safe access to marine recreational fisheries during pandemics would provide

Published
2021

17. First Assessment of the Impacts of the COVID-19 Pandemic on Global Marine Recreational Fisheries

Author

Agencia Estatal de Investigación (España), Pita, Pablo, Ainsworth, Gillian B., Alba, Bernardino, Anderson, Antônio B., Antelo, Manel, Alós, Josep, Artetxe, Iñaki, Baudrier, Jérôme, Castro, José J., Chicharro, Belén, Erzini, Karim, Ferter, Keno, Freitas, Mafalda, García-de-la-Fuente, Laura, García-Charton, José A., Giménez-Casalduero, María, Grau, Antoni Maria, Diogo, Hugo, Gordoa, Ana, Henriques, Filipe, Hyder, Kieran, Jiménez-Alvarado, David, Karachle, Paraskevi K., Lloret, Josep, Laporta, Martin, Lejk, Adam M., Dedeu, Arnau L., Martín-Sosa, P., Martínez, Lllibor, Mira, Antonio, Morales-Nin, Beatriz, Mugerza, Estanis, Olesen, Hans Jakob, Papadopoulos, Anastasios, Pontes, João Rodolfo S., Pascual-Fernández, José J., Purroy, Ariadna, Ramires, Milena, Rangel, Mafalda, Reis-Filho, José Amorim, Sánchez Lizaso, José L., Sandoval, Virginia, Sbragaglia, Valerio, Silva, Luis, Skov, Christian, Sola, Iván, Strehlow, Harry V., Torres, María A., Ustups, Didzis, van der Hammen, Tessa, Veiga, Pedro, Venerus, Leonardo A., Verleye, Thomas, Villasante, Sebastián, Weltersbach, Marc Simon, Zarauz, Lucia, Agencia Estatal de Investigación (España), Pita, Pablo, Ainsworth, Gillian B., Alba, Bernardino, Anderson, Antônio B., Antelo, Manel, Alós, Josep, Artetxe, Iñaki, Baudrier, Jérôme, Castro, José J., Chicharro, Belén, Erzini, Karim, Ferter, Keno, Freitas, Mafalda, García-de-la-Fuente, Laura, García-Charton, José A., Giménez-Casalduero, María, Grau, Antoni Maria, Diogo, Hugo, Gordoa, Ana, Henriques, Filipe, Hyder, Kieran, Jiménez-Alvarado, David, Karachle, Paraskevi K., Lloret, Josep, Laporta, Martin, Lejk, Adam M., Dedeu, Arnau L., Martín-Sosa, P., Martínez, Lllibor, Mira, Antonio, Morales-Nin, Beatriz, Mugerza, Estanis, Olesen, Hans Jakob, Papadopoulos, Anastasios, Pontes, João Rodolfo S., Pascual-Fernández, José J., Purroy, Ariadna, Ramires, Milena, Rangel, Mafalda, Reis-Filho, José Amorim, Sánchez Lizaso, José L., Sandoval, Virginia, Sbragaglia, Valerio, Silva, Luis, Skov, Christian, Sola, Iván, Strehlow, Harry V., Torres, María A., Ustups, Didzis, van der Hammen, Tessa, Veiga, Pedro, Venerus, Leonardo A., Verleye, Thomas, Villasante, Sebastián, Weltersbach, Marc Simon, and Zarauz, Lucia

Abstract

This work is the result of an international research effort to determine the main impacts of the COVID-19 pandemic on marine recreational fishing. Changes were assessed on (1) access to fishing, derived from lockdowns and other mobility restrictions; (2) ecosystems, because of alterations in fishing intensity and human presence; (3) the blue economy, derived from alterations in the investments and expenses of the fishers; and (4) society, in relation to variations in fishers’ health and well-being. For this, a consultation with experts from 16 countries was carried out, as well as an international online survey aimed at recreational fishers, that included specific questions designed to capture fishers’ heterogeneity in relation to behavior, skills and know-how, and vital involvement. Fishers’ participation in the online survey (5,998 recreational fishers in 15 countries) was promoted through a marketing campaign. The sensitivity of the fishers’ clustering procedure, based on the captured heterogeneity, was evaluated by SIMPER analysis and by generalized linear models. Results from the expert consultation highlighted a worldwide reduction in marine recreational fishing activity. Lower human-driven pressures are expected to generate some benefits for marine ecosystems. However, experts also identified high negative impacts on the blue economy, as well as on fisher health and well-being because of the loss of recreational fishing opportunities. Most (98%) of the fishers who participated in the online survey were identified as advanced, showing a much higher degree of commitment to recreational fishing than basic fishers (2%). Advanced fishers were, in general, more pessimistic about the impacts of COVID19, reporting higher reductions in physical activity and fish consumption, as well as poorer quality of night rest, foul mood, and raised more concerns about their health status. Controlled and safe access to marine recreational fisheries during pandemics would provide b

Published
2021

18. Working Group on Recreational Fisheries Surveys (WGRFS; outputs from 2019 meeting)

Author

Ahvonen, Anssi, Baudrier, Jérôme, Diogo, Hugo M C, Dunton, Arnau, Gordoa, Ana, Grati, Fabio, Hartill, Bruce, Hinriksson, Jan, Alvarado, David Jiménez, Kagervall, Anders, Kairyté, Lina, Kapiris, Kostas, Karlsson, Martin, Lafon, Jérôme, Laporta, Martin, Lejk, Adam M, Martinez, Roi, Mohamed, Esha, Moilanen, Pentti, Mugerza, Estanis, Olesen, Hans Jakob, Papadopoulos, Anastasios, Pita, Pablo, Ponte, Joao, Poviliūnas, Justas, Radford, Zachary, Radtke, Krzysztof, Rangel, Mafalda, Reis, Dália, Pla, Oscar Sagué, Skov, Christian, Strehlow, Harry Vincent, Sundelöf, Andreas, Townhill, Bryony, Turnbull, David, Ustups, Didzis, van der Hammen, Tessa, Veiga, Pedro, Venerus, Leonardo A., Verleye, Thomas, Vølstad, Jon Helge, Watson, Joseph, and Weltersbach, Marc Simon

Subjects
0106 biological sciences, 13. Climate action, 010604 marine biology & hydrobiology, SDG 13 - Climate Action, 040102 fisheries, 0401 agriculture, forestry, and fisheries, SDG 14 - Life Below Water, 14. Life underwater, 04 agricultural and veterinary sciences, 01 natural sciences
Abstract

The ICES Working Group on Recreational Fisheries Surveys (WGRFS) role is to summarise and quality assure recreational fishery data collected in European countries, and feed into the ICES advisory process on recreational fishing issues. In 2019, WGRFS shared and evaluated current national surveys; assessed the validity of new survey designs; assessed the use of survey data in stock assessments and the impact of catch and release; discussed the treatment of outliers in the analysis of survey data; reviewed the potential impacts of climate change on species distribution and updated the species list for collection under the Data Collection Framework (Regulation ((EC) No 2017/1004)); reviewed European and regional coordination; assessed data storage options; assessed novel survey methods; and discussed the ICES Workshop on Integrating Human Dimensions into the Management of Marine Recreational Fisheries (WKHDR). WGRFS provides a useful network for individuals developing surveys to test their ideas and designs that will increase the quality of data delivered. WGRFS has engaged with the Regional Coordination Groups, providing input into meetings and support for issues around recreational fisheries. The profile of the group has been raised through scientific presentations at conferences, and contribution to the development of a theme set in the ICES Journal of Marine Sciences titled “Marine recreational fisheries - current state and future opportunities”. Over the last year, the members of the group have published several publications facilitated by the WGRFS including an assessment of the impacts of recreational fishing on key European fish stocks, a review on the potential environmental impacts of recreational fisheries on stocks and ecosystems, and a review on digital camera monitoring of recreational fishing effort. At the 2019 meeting, further progress was made in key areas. Updates were provided on national sampling programmes, with surveys underway in almost all countries, and the most recent estimates collated. The design and implementation phase of the Galician (Spain), Swedish, and Danish programmes were assessed using the WGRFS quality assurance tool. The need for novel approaches for inclusion of recreational data in stock assessment for a broader range of stocks was highlighted, and approaches for catch allocations were discussed. Furthermore, the potential impacts of climate change on species caught by recreational fisheries and how that could impact on species lists for collection under the DCF was assessed. Approaches for European and regional coordination of data collection were discussed. Novel methods for data collection were highlighted, and need to be reviewed regularly as the landscape is changing very quickly. Intersessional work was agreed on: analysis and inclusion of data in stock assessments; compiling methods for catch allocation between user groups; and updating the quality assessment tool. The WGRFS recommendations were: developing a database that compiles estimates of recreational fisheries catches; to include recreational fisheries in more stock assessments and advice; that further work on the impacts of catch and release should be funded; and a workshop to review the impact of recreational fisheries based on the outcomes from EU-MAP pilot studies.

Published
2020

20. Expert opinion on using angler Smartphone apps to inform marine fisheries management: status, prospects, and needs

Author

Skov, Christian, primary, Hyder, Kieran, additional, Gundelund, Casper, additional, Ahvonen, Anssi, additional, Baudrier, Jérôme, additional, Borch, Trude, additional, deCarvalho, Sara, additional, Erzini, Karim, additional, Ferter, Keno, additional, Grati, Fabio, additional, van derHammen, Tessa, additional, Hinriksson, Jan, additional, Houtman, Rob, additional, Kagervall, Anders, additional, Kapiris, Kostas, additional, Karlsson, Martin, additional, Lejk, Adam M, additional, Lyle, Jeremy M, additional, Martinez-Escauriaza, Roi, additional, Moilanen, Pentti, additional, Mugerza, Estanis, additional, Olesen, Hans Jakob, additional, Papadopoulos, Anastasios, additional, Pita, Pablo, additional, Pontes, João, additional, Radford, Zachary, additional, Radtke, Krzysztof, additional, Rangel, Mafalda, additional, Sagué, Oscar, additional, Sande, Hege A, additional, Strehlow, Harry V, additional, Tutiņš, Rūdolfs, additional, Veiga, Pedro, additional, Verleye, Thomas, additional, Vølstad, Jon Helge, additional, Watson, Joseph W, additional, Weltersbach, Marc Simon, additional, Ustups, Didzis, additional, and Venturelli, Paul A, additional

Published
2021
Full Text
View/download PDF

21. Working Group on Biological Parameters (WGBIOP)

Author

Bekaert, Karen, Canha, Ângela, Finnbogadóttir, Guðrún, Costa, Ana Maria, Follesa, Maria Cristina, Gault, Mandy, Hilvarsson, Annelie, Hüssy, Karin, Korta, Maria, Krüger-Johnsen, Maria, Krumme, Uwe, Landa, Jorge, Lejk, Adam M, Mahe, Kélig, Maxwell, David, McCormick, Helen, Mirny, Zuzanna, Nunes, Cristina, Ofridopoulou, Konstantina, Piñeiro, Carmen Gloria, Pinto, Carlos, Raid, Tiit, Raitaniemi, Jari, Rodriguez, Alfonso Perez, Sapoundis, Argyris, Sauger, Carine, Smith, Joanne, Soares, Eduardo, Stransky, Christoph, Torreele, Els, Maireles-Torres, Pedro, Ulleweit, Jens, Visconti, Valerio, Vitale, Francesca, Zilniece, Dace, Mules, Ruadhan Gillespie, Gonçalves, Patricia, Bekaert, Karen, Canha, Ângela, Finnbogadóttir, Guðrún, Costa, Ana Maria, Follesa, Maria Cristina, Gault, Mandy, Hilvarsson, Annelie, Hüssy, Karin, Korta, Maria, Krüger-Johnsen, Maria, Krumme, Uwe, Landa, Jorge, Lejk, Adam M, Mahe, Kélig, Maxwell, David, McCormick, Helen, Mirny, Zuzanna, Nunes, Cristina, Ofridopoulou, Konstantina, Piñeiro, Carmen Gloria, Pinto, Carlos, Raid, Tiit, Raitaniemi, Jari, Rodriguez, Alfonso Perez, Sapoundis, Argyris, Sauger, Carine, Smith, Joanne, Soares, Eduardo, Stransky, Christoph, Torreele, Els, Maireles-Torres, Pedro, Ulleweit, Jens, Visconti, Valerio, Vitale, Francesca, Zilniece, Dace, Mules, Ruadhan Gillespie, and Gonçalves, Patricia

Abstract

The ICES Working Group on Biological Parameters (WGBIOP) general aim is to review the status of current issues and developments associated with biological parameters, supporting the Data Collection Framework and end user (stock assessment) requirements. WGBIOP continued the work of reviewing past exchanges and workshops for age and maturity organised under the remits of WGBIOP and in line with their above-mentioned aim. The focus was on the stocks to be benchmarked in the coming years and available issue lists used to identify any problems to be addressed. Steps for implementing the output from exchanges and work-shops into the stock assessment models in the form of age error matrices (AEM’s), which are now a standard output in the SmartDots reports, were outlined. SmartDots is an age reading platform that facilitates age readings based on otolith images. The most effective way to investigate this process would be during the benchmark process. The continued efforts to streamline the work-flow of WGBIOP with the benchmark process has not developed any further since the group met in 2018 and will be addressed with the Advisory Committee (ACOM) and the Planning Group on Data Needs for Assessment and Advice (PGDATA) in 2020. Continued investigations into possible new life history parameters for modern assessment included the development of a de-liverable stomach sampling and contents analysis action plan. The need for age validation studies was again highly stressed by the repeated low levels of poor agreement between age readers of some stocks with lack of resources identified as the main ob-stacle. During the scientific session on ‘Age and Maturity Validation Studies’ several experi-ment/studies were presented and discussed, mostly in light of their applicability and in 2020 a list of prioritised stocks to be validated will be finalised. WGBIOP also developed a workplan for the ICES Handbook on maturity staging of marine species. With respect to standardis

Published
2019

22. Acoustic telemetry data on lake-migratory brown trout, Salmo trutta lacustrisL., behavior in Lake Hańcza, northeastern Poland, within one year of release

Author

Mierzejewska, Katarzyna, Dynowski, Piotr, Stańczak, Katarzyna, Stabiński, Robert, Woźniak, Małgorzata, Kozłowski, Krzysztof, Lejk, Adam M., and Kapusta, Andrzej

Abstract

The poor results of lake-migratory brown trout, Salmo trutta lacustrisL., restoration in Lake Hańcza Nature Reserve prompted undertaking the current study that sought to verify if hatchery-reared fish age 2+ can survive the critical period of acclimation and remain in the lake. Thirty-one individuals were tagged with coded acoustic transmitters and observed for 317 days. This method helped to analyze: 1) the spatial behavior of tagged fish for one year following their release; 2) the possible differences in the behavior of fish released in various places habitually used for stocking. By the end of study, 6.5–12.9% of the tagged fish remained in the lake. The most interesting phenomenon the data indicated was the trout behavior in late spring and early summer, when the fish moved vigorously along the longitudinal axis of the lake continuously for several weeks. The reasons for the fish movements observed in Lake Hańcza were not clear. For this unique species/population it is important to determine whether such behavior is typical of this fish also in other water bodies and if it is only seen in hatchery-reared fish aged 2+ and 3+.

Published
2022
Full Text
View/download PDF

23. Recreational sea fishing in Europe in a global context-Participation rates, fishing effort, expenditure, and implications for monitoring and assessment

Author

Hyder, Kieran, Weltersbach, Marc Simon, Armstrong, Mike, Ferter, Keno, Townhill, Bryony, Ahvonen, Anssi, Arlinghaus, Robert, Baikov, Andrei, Bellanger, Manuel, Birzaks, Janis, Borch, Trude, Cambie, Giulia, De Graaf, Martin, Diogo, Hugo M. C., Dziemian, Lukasz, Gordoa, Ana, Grzebielec, Ryszard, Hartill, Bruce, Kagervall, Anders, Kapiris, Kostas, Karlsson, Martin, Kleiven, Alf Ring, Lejk, Adam M., Levrel, Harold, Lovell, Sabrina, Lyle, Jeremy, Moilanen, Pentti, Monkman, Graham, Morales-nin, Beatriz, Mugerza, Estanis, Martinez, Roi, O'Reilly, Paul, Olesen, Hans Jakob, Papadopoulos, Anastasios, Pita, Pablo, Radford, Zachary, Radtke, Krzysztof, Roche, William, Rocklin, Delphine, Ruiz, Jon, Scougal, Callum, Silvestri, Roberto, Skov, Christian, Steinback, Scott, Sundelof, Andreas, Svagzdys, Arvydas, Turnbull, David, Van Der Hammen, Tessa, Van Voorhees, David, Van Winsen, Frankwin, Verleye, Thomas, Veiga, Pedro, Volstad, Jon-helge, Zarauz, Lucia, Zolubas, Tomas, Strehlow, Harry V., Hyder, Kieran, Weltersbach, Marc Simon, Armstrong, Mike, Ferter, Keno, Townhill, Bryony, Ahvonen, Anssi, Arlinghaus, Robert, Baikov, Andrei, Bellanger, Manuel, Birzaks, Janis, Borch, Trude, Cambie, Giulia, De Graaf, Martin, Diogo, Hugo M. C., Dziemian, Lukasz, Gordoa, Ana, Grzebielec, Ryszard, Hartill, Bruce, Kagervall, Anders, Kapiris, Kostas, Karlsson, Martin, Kleiven, Alf Ring, Lejk, Adam M., Levrel, Harold, Lovell, Sabrina, Lyle, Jeremy, Moilanen, Pentti, Monkman, Graham, Morales-nin, Beatriz, Mugerza, Estanis, Martinez, Roi, O'Reilly, Paul, Olesen, Hans Jakob, Papadopoulos, Anastasios, Pita, Pablo, Radford, Zachary, Radtke, Krzysztof, Roche, William, Rocklin, Delphine, Ruiz, Jon, Scougal, Callum, Silvestri, Roberto, Skov, Christian, Steinback, Scott, Sundelof, Andreas, Svagzdys, Arvydas, Turnbull, David, Van Der Hammen, Tessa, Van Voorhees, David, Van Winsen, Frankwin, Verleye, Thomas, Veiga, Pedro, Volstad, Jon-helge, Zarauz, Lucia, Zolubas, Tomas, and Strehlow, Harry V.

Abstract

Marine recreational fishing (MRF) is a high-participation activity with large economic value and social benefits globally, and it impacts on some fish stocks. Although reporting MRF catches is a European Union legislative requirement, estimates are only available for some countries. Here, data on numbers of fishers, participation rates, days fished, expenditures, and catches of two widely targeted species were synthesized to provide European estimates of MRF and placed in the global context. Uncertainty assessment was not possible due to incomplete knowledge of error distributions; instead, a semi-quantitative bias assessment was made. There were an estimated 8.7 million European recreational sea fishers corresponding to a participation rate of 1.6%. An estimated 77.6 million days were fished, and expenditure was €5.9 billion annually. There were higher participation, numbers of fishers, days fished and expenditure in the Atlantic than the Mediterranean, but the Mediterranean estimates were generally less robust. Comparisons with other regions showed that European MRF participation rates and expenditure were in the mid-range, with higher participation in Oceania and the United States, higher expenditure in the United States, and lower participation and expenditure in South America and Africa. For both northern European sea bass (Dicentrarchus labrax, Moronidae) and western Baltic cod (Gadus morhua, Gadidae) stocks, MRF represented 27% of the total removals. This study highlights the importance of MRF and the need for bespoke, regular and statistically sound data collection to underpin European fisheries management. Solutions are proposed for future MRF data collection in Europe and other regions to support sustainable fisheries management.

Published
2018
Full Text
View/download PDF

25. Recreational sea fishing in Europe in a global context-Participation rates, fishing effort, expenditure, and implications for monitoring and assessment

Author

Hyder, Kieran, primary, Weltersbach, Marc Simon, additional, Armstrong, Mike, additional, Ferter, Keno, additional, Townhill, Bryony, additional, Ahvonen, Anssi, additional, Arlinghaus, Robert, additional, Baikov, Andrei, additional, Bellanger, Manuel, additional, Birzaks, Janis, additional, Borch, Trude, additional, Cambie, Giulia, additional, de Graaf, Martin, additional, Diogo, Hugo M C, additional, Dziemian, Łukasz, additional, Gordoa, Ana, additional, Grzebielec, Ryszard, additional, Hartill, Bruce, additional, Kagervall, Anders, additional, Kapiris, Kostas, additional, Karlsson, Martin, additional, Kleiven, Alf Ring, additional, Lejk, Adam M, additional, Levrel, Harold, additional, Lovell, Sabrina, additional, Lyle, Jeremy, additional, Moilanen, Pentti, additional, Monkman, Graham, additional, Morales-Nin, Beatriz, additional, Mugerza, Estanis, additional, Martinez, Roi, additional, O'Reilly, Paul, additional, Olesen, Hans Jakob, additional, Papadopoulos, Anastasios, additional, Pita, Pablo, additional, Radford, Zachary, additional, Radtke, Krzysztof, additional, Roche, William, additional, Rocklin, Delphine, additional, Ruiz, Jon, additional, Scougal, Callum, additional, Silvestri, Roberto, additional, Skov, Christian, additional, Steinback, Scott, additional, Sundelöf, Andreas, additional, Svagzdys, Arvydas, additional, Turnbull, David, additional, van der Hammen, Tessa, additional, van Voorhees, David, additional, van Winsen, Frankwin, additional, Verleye, Thomas, additional, Veiga, Pedro, additional, Vølstad, Jon-Helge, additional, Zarauz, Lucia, additional, Zolubas, Tomas, additional, and Strehlow, Harry V, additional

Published
2017
Full Text
View/download PDF

28. Stress induced by substantial skeletal deformities in pike fry is not reflected in otolith fluctuating asymmetry: An experiment and literature review.

Author

Fey, Dariusz P., Greszkiewicz, Martyna, and Lejk, Adam M.

Subjects
*HATCHERY fishes, *HUMAN abnormalities, *LITERATURE reviews, *WATER pollution, *ANIMAL products, *FRYING
Abstract

Fluctuating asymmetry (FA), an indicator of developmental instability, has been suggested to serve as a useful bioindicator of the fitness and condition of various groups of animals, including fish. The current study aimed to determine whether skeletal and body deformities of northern pike fry (3–12 cm standard length SL) reared under laboratory conditions imposed stress that was reflected in FA in otolith size (area). Although hatchery-reared fish were studied, FA also occurs in natural conditions and may indicate harmful effects of different environmental factors, including water pollution. Both the sagitta and lapillus were analyzed in fish with (n = 60) and without (n = 60) skeletal deformities. Despite the severity of deformity and extended duration of stress exposure (from hatching to ca. 2–3 months of life), there was no significant effect of the stressor on otolith FA, neither for sagittae nor lapilli. An overview of the literature indicated that links between stressors and fish otolith FA are not common (found in 9 out of 31 investigations). Thus, otolith FA is probably not an appropriate bioindicator for detecting the effects of different stressors, including pollution, despite previous suggestions. [Display omitted] [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results