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


Roberts, J and Childerhouse, S and Roe, W and Baker, GB and Hamilton, SA, 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, 115, (36) pp. E8330-E8331. ISSN 0027-8424 (2018) [Letter or Note in Journal]

Copyright Statement

Copyright 2018 The Authors

DOI: doi:10.1073/pnas.1806136115


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 Details

Item Type:Letter or Note in Journal
Keywords:marine mammal, fisheries, bycatch, sea lions, seals, trawl
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fisheries management
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Fisheries - wild caught not elsewhere classified
UTAS Author:Baker, GB (Dr Barry Baker)
UTAS Author:Hamilton, SA (Ms Sheryl Hamilton)
ID Code:128261
Year Published:2018
Web of Science® Times Cited:2
Deposited By:Oceans and Cryosphere
Deposited On:2018-09-12
Last Modified:2018-11-05

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