Lower selectivity can help heavily exploited fish populations

Aramayo, Víctor

doi:10.1016/j.fishres.2015.07.028

Cited by 2 publications

(1 citation statement)

References 40 publications

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“…The consistent presence of large, mature females in certain areas through time highlights the importance of shallow areas for these females. Large, mature females are hugely important for population recruitment, resilience, and viability; their removal may promote negative rapid life‐history changes such as those observed in G. morhua (Aramayo, 2015). Although there was no statistically significant difference in the sex ratios of R. clavata (all individuals, and those ≥90 cm) between shallow and inshore survey locations, further investigation into sex ratios in specific areas may be valuable.…”

Section: Discussionmentioning

confidence: 99%

Population ecology and juvenile density hotspots of thornback ray (Raja clavata) around the Shetland Islands, Scotland

McAllister,

Fraser,

Henry

2023

Journal of Fish Biology

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Elasmobranchs are facing global decline, and so there is a pressing need for research into their populations to inform effective conservation and management strategies. Little information exists on the population ecology of skate species around the British Isles, presenting an important knowledge gap that this study aimed to reduce. The population ecology of thornback ray (Raja clavata) around the Shetland Islands, Scotland, was investigated in two habitats: inshore (50–150 m deep) and shallow coastal (20–50 m deep), from 2011 to 2022, and 2017 to 2022, respectively. Using trawl survey data from the annual Shetland Inshore Fish Survey, the size composition of R. clavata catches was compared between shallow and inshore habitats across 157 trawl sets, and 885 individuals, over the years 2017–2022. Catch per unit effort (CPUE) of R. clavata was significantly higher in shallow than that in inshore areas (ANOVA, F = 72.52, df = 1, 5, p < 0.001). Size composition also significantly differed between the two habitats (analysis of similarities, R = 0.96, p = 0.002), with R. clavata being smaller in shallow areas and juveniles (<60 cm) occurring more frequently. Spatial distribution maps confirmed density hotspots of juveniles in shallow habitats, with repeated use of certain locations consistent over time. The results of this study provide the first evidence for R. clavata using shallow areas for potential nurseries in Shetland, which can inform the IUCN's Important Shark and Ray Area process. Furthermore, this study provides important new population ecology information for R. clavata around Shetland, which may have important conservation implications and be valuable for informing species and fisheries stock assessments in this region.

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Section: Discussionmentioning

confidence: 99%

Population ecology and juvenile density hotspots of thornback ray (Raja clavata) around the Shetland Islands, Scotland

McAllister,

Fraser,

Henry

2023

Journal of Fish Biology

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The use of fisheries resources in the Brazilian patent system

Cardoso

Castro

Silva

et al. 2022

An. Acad. Bras. Ciênc.

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The research involved patents deposited/provided between 1999 and 2019, with the search in the system occurring through the descriptors: fi sh(s), mollusk(s), crustacean(s), and algae(s). A total of 363 records were found, where the group of fi sh presented the highest representation (40%), followed by algae (35%), crustaceans (14%), and mollusks (10%). The apex of 34 patent applications was found in the year 2011. Moreover, the results showed that the inventions registered are directed mainly to food, drugs, biocides, cosmetics, cultivation, processing and benefi ciation, water treatment, patents for sustainable technologies (green patents), and biotechnology. Brazil holds most patent applications, followed by the United States of America (USA), which focuses its patent applications mainly on algae and fi sh. Considering the Brazilian biodiversity and the country's technological development in recent years, Brazil needs to expand its technological autonomy and competitive capacity in the aquaculture and fi sheries sector, mainly through the strengthening of R&D and innovation activities.

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Lower selectivity can help heavily exploited fish populations

Cited by 2 publications

References 40 publications

Population ecology and juvenile density hotspots of thornback ray (Raja clavata) around the Shetland Islands, Scotland

Population ecology and juvenile density hotspots of thornback ray (Raja clavata) around the Shetland Islands, Scotland

The use of fisheries resources in the Brazilian patent system

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