Population genomics of the Eastern Rock Lobster, Sagmariasus verreauxi, during spawning stock recovery from over-exploitation

Woodings, Laura N., Murphy, Nicholas P., Liggins, Geoffrey W., Miller, Marcus E., Ballinger, Giles M., Lau, Sally C.Y., and Strugnell, Jan M. (2021) Population genomics of the Eastern Rock Lobster, Sagmariasus verreauxi, during spawning stock recovery from over-exploitation. ICES Journal of Marine Science, 78 (7). pp. 2448-2459.

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Abstract

Fisheries are currently under pressure to provide increasing amounts of seafood, causing a growing number of marine stocks to be harvested at unsustainable levels. To ensure marine resources remain sustainable, careful management of biological stocks and their genetic integrity is required. The Eastern Rock Lobster, Sagmariasus verreauxi, is commercially harvested along the New South Wales (NSW) coast of eastern Australia and is managed as a single unit. Due to overfishing, the NSW S. verreauxi stock was severely depleted in the mid-1990s but has since been rebuilding. This study evaluates the population genetic structure, putative local adaptation, and potential of a population bottleneck for NSW S. verreauxi. Using neutral single nucleotide polymorphisms (SNPs), we determined NSW S. verreauxi consist of a single genetic stock, with outlier SNPs detecting weak genetic divergence among offshore locations, and evidence of population bottlenecks at all locations. Our findings (i) confirm a single management unit is appropriate; (ii) can be used as a baseline for future genetic monitoring of NSW S. verreauxi; and (iii) highlights the importance of implementing routine genetic monitoring and collecting temporal samples to understand the full impact of overfishing on a species resilience.

Item ID: 72372
Item Type: Article (Research - C1)
ISSN: 1095-9289
Keywords: bottleneck, ddRAD Seq, fisheries management, genetic stocks, lobster, SNPs
Copyright Information: © The Author(s) 2021. Published by Oxford University Press on behalf of International Council for the Exploration of the Sea. All rights reserved.
Date Deposited: 09 Feb 2022 14:38
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