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Robustness of potential biological removal to monitoring, environmental, and management uncertainties

Research output: Contribution to journalArticlepeer-review

Author(s)

André E Punt, Margaret Siple, Tessa B Francis, Phillip S Hammond, Dennis Heinemann, Kristy J Long, Jeffrey E Moore, Maritza Sepúlveda, Randall R Reeves, Guðjón Már Sigurðsson, Gísli Vikingsson, Paul R Wade, Rob Williams, Alexandre N Zerbini

School/Research organisations

Abstract

The potential biological removal (PBR) formula used to determine a reference point for human-caused mortality of marine mammals in the United States has been shown to be robust to several sources of uncertainty. This study investigates the consequences of the quality of monitoring on PBR performance. It also explores stochastic and demographic uncertainty, catastrophic events, sublethal effects of interactions with fishing gear, and the situation of a marine mammal population subject to bycatch in two fisheries, only one of which is managed. Results are presented for two pinniped and two cetacean life histories. Bias in abundance estimates and whether there is a linear relationship between abundance estimates and true abundance most influence conservation performance. Catastrophic events and trends in natural mortality have larger effects than environmental stochasticity. Managing only one of two fisheries with significant bycatch leads, as expected, to a lower probability of achieving conservation management goals, and better outcomes would be achieved if bycatch in all fisheries were managed. The results are qualitatively the same for the four life histories, but estimates of the probability of population recovery differ.
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Details

Original languageEnglish
Article numberfsaa096
Number of pages17
JournalICES Journal of Marine Science
VolumeAdvance Article
DOIs
Publication statusPublished - 10 Sep 2020

    Research areas

  • Bycatch, Conservation, Marine mammal, MSE, Potential biological removal, Simulation, Uncertainty

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