Genetic structure and recent population expansion in the commercially harvested deep-sea decapod,Metanephrops challengeri (Crustacea: Decapoda) |
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| Authors: | Alexander J F Verry Kerry Walton Ian D Tuck Peter A Ritchie |
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| Institution: | 1. School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand;2. Department of Zoology, University of Otago, Dunedin, New Zealand verryalex94@gmail.com;4. Department of Zoology, University of Otago, Dunedin, New Zealand;5. Museum of New Zealand Te Papa Tongarewa, Wellington, New Zealand;6. National Institute of Water and Atmospheric Research, Auckland, New Zealand;7. Department of Statistics, University of Auckland, Auckland, New Zealand;8. School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand  https://orcid.org/0000-0002-8351-7931 |
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| Abstract: | ABSTRACT Determining the genetic structure and population dynamics of harvested species are key aspects of effective fisheries management. New Zealand scampi (Metanephrops challengeri) is a species of nethropid lobster that supports a commercial fishery on the continental shelf and slope around New Zealand. To determine the genetic structure and historical population demography of New Zealand scampi, we sequenced a 623 base-pair fragment of the mitochondrial gene cytochrome c oxidase subunit one (CO1) from 321 individuals across six widely separated sites off the coast of mainland New Zealand and the subantarctic Auckland Islands, representing much of the species’ distribution. The Auckland Islands population was found to be genetically distinct from all other sampled populations, potentially resulting from an absence of continuous suitable habitat between the central-eastern South Island and the Auckland Islands. An isolation-by-distance pattern of genetic structure was also detected. With the exception of the Mercury Islands, all sampled populations showed signs of recent population expansion, potentially linked to changes in habitat availability during the glacial-interglacial cycles of the Pleistocene. We recommend that the current NZ scampi management areas and harvesting rates for each remain unchanged. |
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| Keywords: | Scampi Nephropidae fisheries phylogeography stock New Zealand |
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https://orcid.org/0000-0002-8351-7931