What question did this study set out to answer?

To evaluate whether trawl net avoidance by mesopelagic fishes leads to systematic underestimation of their global biomass and ecological significance.

May 7, 2012Marine Ecology Progress SeriesOpen Access

Efficient trawl avoidance by mesopelagic fishes causes large underestimation of their biomass

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Authors

SKStein KaartvedtUniversity of Oslo ASArved StabyNorwegian Institute of Marine Research DADL AksnesUniversity of Bergen

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Implication

Ecological study reveals efficient trawl avoidance by mesopelagic fish in the North Atlantic, suggesting global oceanic biomass may be underestimated tenfold.

Key Points

To evaluate whether trawl net avoidance by mesopelagic fishes leads to systematic underestimation of their global biomass and ecological significance.
Assessed sampling net avoidance behavior in Benthosema glaciale, the dominant myctophid species in the Northern Atlantic.
Compared pre-1980 net-based global abundance estimates (1 gigatonne wet weight) against modern acoustic survey observations across oceanic regions.
Benthosema glaciale exhibits efficient avoidance behavior during trawl sampling, explaining discrepancies with acoustic surveys.
Global mesopelagic fish biomass is likely underestimated by approximately one order of magnitude relative to the current one-gigatonne wet weight estimate.

Cite This Study

Kaartvedt et al. (2012) studied this question.

synapsesocial.com/papers/69d44a43817f506a4ea5a8ec https://doi.org/10.3354/meps09785

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Implication

Ecological study reveals efficient trawl avoidance by mesopelagic fish in the North Atlantic, suggesting global oceanic biomass may be underestimated tenfold.

Efficient trawl avoidance by mesopelagic fishes causes large underestimation of their biomass

Discussion

Member takes

Implication

Key Points

Cite This Study

Efficient trawl avoidance by mesopelagic fishes causes large underestimation of their biomass

Discussion

Member takes

Implication

Key Points

Cite This Study

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