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No evidence of cryptic bycatch causing New Zealand sea lion population decline

Roberts, J, Childerhouse, S, Roe, W, Baker, GB and Hamilton, S 2018 , 'No evidence of cryptic bycatch causing New Zealand sea lion population decline' , Proceedings of the National Academy of Sciences of The United States of America, vol. 115, no. 36 , E8330-E8331 , doi: 10.1073/pnas.1806136115.

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Abstract

In PNAS, Meyer et al. (1) analyze whether exclusion devices in trawl nets contributed to New Zealand sea lion (NZSL; Phocarctos hookeri) population decline at the Auckland Islands. We refute the primary conclusion from their correlative assessment: that annual pup production changes (as a measure of population size) were primarily driven by cryptic bycatch of adults in sub-Antarctic trawl fisheries. We also contest their interpretation that sea lion exclusion devices (SLEDs), used throughout the Auckland Islands squid trawl fishery since 2004, “…can obscure rather than alleviate fishery impacts on marine megafauna” (1).

Item Type: Article
Authors/Creators:Roberts, J and Childerhouse, S and Roe, W and Baker, GB and Hamilton, S
Keywords: marine mammal, fisheries, bycatch, sea lions, seals, trawl
Journal or Publication Title: Proceedings of the National Academy of Sciences of The United States of America
Publisher: Natl Acad Sciences
ISSN: 0027-8424
DOI / ID Number: 10.1073/pnas.1806136115
Copyright Information:

Copyright 2018 The Authors

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