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The article reports on the temporary variations in the average trophic level of the artisan fisheries of the Canary Islands. It mentions increases in the MTLc over time tend to be associated with a good state of ecosystem health, but this interpretation can be erroneous if the peculiarities of the fishery are not taken into account being analysed, the fishing grounds and the composition of the catches.

The article informs on mantelline in the Canary Islands. It mentions the mantelline aggregates in different areas of the islands, forming a carpet on the seabed, in many cases making it impossible to see the sand clearly, and camouflage is their main weapon, since they feed by ambushing their prey. It also mentions about its ecology.

The article offers information on the conflicts in recreational fishing with artisanal fishing through an ecosystem approach. Topics discussed include implications for management of sustainable resources; series of peculiarities both oceanographic and geological by Canary Islands; the productivity of marine ecosystems and condition the fisheries development; and evaluating the impact that fishing, both artisanal and recreational, having on the marine ecosystems.

The article offers information on the artisanal coastal fishing, that carried out by vessels of overall length less than 12 meters that do not use certain trawls, in Europe. Topics discussed include importance of traditionally coastal fishing as compared to industrial fishing; marine strategies to preserve marine ecosystems and make reasonable use of resources, without compromising the good environmental status of the seas; and role of artisanal fishermen in fisheries management.

The article offers information on the Standardization of catch and effort time series of fishing and fisheries management policies. Topics discussed include using catch data per unit of effort (CPUE) recorded during operations fishing; impact of eliminate or minimize the influence that external factors such as species distribution, climatic variables and closed seasons on the catches and the level of fishing effort; and characterization of the Canarian fishery.

The article reports that the Atlantic Society of Oceanographers (SAO), in collaboration with the University of Las Palmas de Gran Canaria and the Canary Islands Government, organized the Oceans Forum 2019. It notes that the Atlantic Society of Oceanographers (SAO) has more than 8 years developing activities in favor of knowledge transfer from centers of research to society and administrations public.

1. Angel sharks are among the most threatened fish worldwide, facing regional and global extinction. In Europe, populations of the three Critically Endangered angel sharks (Squatina aculeata, Squatina oculata and Squatina squatina) have been severely depleted. 2. Taking advantage of the last global 'hotspot' of the angelshark, Squatina squatina, this study gathered data through a citizen science programme to describe the occurrence of this shark in the coastal waters of the Canary Islands. Specifically, this study described (1) the population structure, and (2) habitat use of this species, which was used in a Species Distribution Model to (3) examine realized and potential distribution patterns, and to (4) determine the relative importance of environmental predictors on the occurrence of S. squatina. 3. Over the 12 months sampling period (April 2014 - March 2015), 678 sightings were reported. Individuals ranged from 20 to 200 cm (total length). Larger sightings of both females and neonates occurred mostly in April to July, i.e. during the pupping season. Males were significantly more frequent in November to January, i.e. during the mating season. Angelsharks were encountered at depths from <1 m to a maximum of 45 m. Small-sized individuals (i.e. neonates) exclusively occurred in shallow water (0-25 m). Most sharks occurred on sandy bottoms adjacent to reefs. 4. Even though sightings were recorded at all seven islands in the archipelago, there were fewer encounters in the western than the eastern islands. 5. The Species Distribution Model indicated that the probability of occurrence mainly correlated with sea surface temperature, chlorophyll, salinity and depth. Areas with the greatest habitat suitability were in shallow water. 6. The angelshark displayed spatial (vertical and horizontal) and temporal segregation by size and sex. This information is vital to inform conservation of this Critically Endangered shark in its last stronghold. [ABSTRACT FROM AUTHOR]

The article presents a study about the feeding ecology of the planehead filefish or Stephanolepis hispidus in the Canary Islands. It examines the seasonal variation in the diet between sexes of the filefish. It also cites the food composition of filefish including hydroids, amphipods, echinoids and algae.

The growth of the planedhead filefish Stephanolepis hispidus was studied on individuals sampled from a small-scale fishery off Gran Canaria (Canary Islands, central-east Atlantic) between March 1998 and August 1999.The age of the sampled individuals, which ranged from 0 to 3 years, was estimated using both the length frequency distribution and the count of growth rings recorded on the anterior dorsal spine. The mean total length of the 0 age class was 10.9 cm, while the ages classes 1, 2 and 3 showed a mean length of 15.8, 19.4 and 21.4 cm, respectively.Differences in the growth rhythms were observed between the sexes. The asymptotic lengths (L∞) were 25.7 and 27.4 cm for females and males, respectively. The curvature parameter (K) of the von Bertalanffy growth equation was 0.40 per year. The amplitude of the seasonal growth oscillation of the von Bertalanffy growth equation (C=0.15) and the Winter Point (WP=0.19) indicate a seasonality in the growth pattern, being slowest at the end of the winter. [Copyright &y& Elsevier]

Introduction: Sea urchin diseases have been documented in several locations worldwide, with reported occurrences of bacterial, protozoan, fungal, and algal infections. Objective: This study aimed to investigate pathogen agents in populations of Arbacia lixula and Paracentrotus lividus along the coast of Gran Canaria Island (Central-East Atlantic, Spain). Methods: Sampling was conducted at San Cristobal beach, on the Northeast side of the island, where sea urchins were manually collected from depths of 1-3 m during June, July, and October 2022. Swab samples were taken from the external and internal areas of the lesions and cultured on various media plates. Results: Eight different pathogen agents, including bacteria and fungi, were identified, with Vibrio alginolyticus being the most frequently observed bacteria in all diseased sea urchin samples. Additionally, ciliated protozoans were found within the tests, potentially acting as opportunistic parasites. Conclusions: This research provides a unique perspective on bald sea urchin disease by identifying a significant number of associated pathogens, including Candida, previously unreported in diseased organisms. Furthermore, the study highlights the presence of an inflammatory response in tissues with bacterial colonies, offering crucial insights into understanding this sea urchin disease. [ABSTRACT FROM AUTHOR]