Successful ecosystem-based management of Antarctic krill should address uncertainties in krill recruitment, behaviour and ecological adaptation

Antarctic krill, Euphausia superba, supports a valuable commercial fishery in the Southwest Atlantic, which holds the highest krill densities and is warming rapidly. The krill catch is increasing, is concentrated in a small area, and has shifted seasonally from summer to autumn/winter. The fishery is managed by the Commission for the Conservation of Antarctic Marine Living Resources, with the main goal of safeguarding the large populations of krill-dependent predators. Here we show that, because of the restricted distribution of successfully spawning krill and high inter-annual variability in their biomass, the risk of direct fishery impacts on the krill stock itself might be higher than previously thought. We show how management benefits could be achieved by incorporating uncertainty surrounding key aspects of krill ecology into management decisions, and how knowledge can be improved in these key areas. This improved information may be supplied, in part, by the fishery itself.


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Authors: Meyer, Bettina, Atkinson, Angus, Bernard, Kim S., Brierley, Andrew S., Driscoll, Ryan, Hill, Simeon L. ORCIDORCID record for Simeon L. Hill, Marschoff, Enrique, Maschette, Dale, Perry, Frances A., Reiss, Christian S., Rombolá, Emilce, Tarling, Geraint A. ORCIDORCID record for Geraint A. Tarling, Thorpe, Sally E. ORCIDORCID record for Sally E. Thorpe, Trathan, Philip N. ORCIDORCID record for Philip N. Trathan, Zhu, Guoping, Kawaguchi, So

On this site: Geraint Tarling, Philip Trathan, Sally Thorpe, Simeon Hill
15 October, 2020
Communications Earth & Environment / 1
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