Shoal familiarity modulates effects of individual metabolism on vulnerability to capture by trawling

Conservation Physiology
Jack HollinsShaun S Killen

Abstract

Impacts of fisheries-induced evolution may extend beyond life history traits to more cryptic aspects of biology, such as behaviour and physiology. Understanding roles of physiological traits in determining individual susceptibility to capture in fishing gears and how these mechanisms change across contexts is essential to evaluate the capacity of commercial fisheries to elicit phenotypic change in exploited populations. Previous work has shown that metabolic traits related to anaerobic swimming may determine individual susceptibility to capture in trawls, with fish exhibiting higher anaerobic performance more likely to evade capture. However, high densities of fish aggregated ahead of a trawl net may exacerbate the role of social interactions in determining an individual fish's behaviour and likelihood of capture, yet the role of social environment in modulating relationships between individual physiological traits and vulnerability to capture in trawls remains unknown. By replicating the final moments of capture in a trawl using shoals of wild minnow (Phoxinus phoxinus), we investigated the role of individual metabolic traits in determining susceptibility to capture among shoals of both familiar and unfamiliar conspecifics. We...Continue Reading

References

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Dec 7, 2018·Ecology and Evolution·Marion ClaireauxKatja Enberg

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Citations

Oct 25, 2020·The Journal of Experimental Biology·Mar PinedaShaun S Killen

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Software Mentioned

R Development Core
rptR
lme4
R
MuMIn
lmer

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