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Fisheries stocks from an ecological perspective: Disentangling ecological connectivity from genetic interchange

Fisheries stocks from an ecological perspective: Disentangling ecological connectivity from genetic interchange
Fisheries stocks from an ecological perspective: Disentangling ecological connectivity from genetic interchange
The concept of a stock of fish as a management unit has been around for well over a hundred years, and this has formed the basis for fisheries science. Methods for delimiting stocks have advanced considerably over recent years, including genetic, telemetric, tagging, geochemical and phenotypic information. In parallel with these developments, concepts in population ecology such as meta-population dynamics and connectivity have advanced. The pragmatic view of stocks has always accepted some mixing during spawning, feeding and/or larval drift. Here we consider the mismatch between ecological connectivity of a matrix of populations typically focussed on demographic measurements, and genetic connectivity of populations that focus on genetic exchange detected using modern molecular approaches. We suggest that from an ecological-connectivity perspective populations can be delimited as management units if there is limited exchange during recruitment or via migration in most years. From a genetic-connectivity perspective such limited exchange can maintain panmixia. We use case-studies of species endangered by overexploitation and/or habitat degradation to show how current methods of stock delimitation can help in managing populations and in conservation.
Marine stock assessment, Metapopulation, Telemetry, Molecular markers, Ecological connectivity
0165-7836
333-341
Hawkins, S.J.
758fe1c1-30cd-4ed1-bb65-2471dc7c11fa
Bohn, K.
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Sims, D.W.
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Ribeiro, P.
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Faria, J.
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Presa, P.
f5b46df2-0d91-43aa-8bd2-e4d36bf5e2a4
Pita, A.
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Martins, G.M.
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Neto, A.I.
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Burrows, M.T.
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Genner, M.J.
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Hawkins, S.J.
758fe1c1-30cd-4ed1-bb65-2471dc7c11fa
Bohn, K.
5b6ff1ee-2ec0-4d15-a02e-b2e575b97953
Sims, D.W.
7234b444-25e2-4bd5-8348-a1c142d0cf81
Ribeiro, P.
802ab1e9-46aa-446f-9ccc-db6fd25e5a78
Faria, J.
fc5a6d84-8eb9-4c70-ad20-4aaa2d6f27fe
Presa, P.
f5b46df2-0d91-43aa-8bd2-e4d36bf5e2a4
Pita, A.
ad3a19d6-ae06-48d3-a02b-89ec524eb631
Martins, G.M.
e58970f9-089c-4881-b8af-deaf2987d042
Neto, A.I.
7a08ec05-25c4-4b5b-9fa2-ce291196aee6
Burrows, M.T.
89ce4c9d-01e6-4ae8-a4a2-5a0d8bb09ec2
Genner, M.J.
bfd02462-1b20-4396-91f0-3b1849c92d48

Hawkins, S.J., Bohn, K., Sims, D.W., Ribeiro, P., Faria, J., Presa, P., Pita, A., Martins, G.M., Neto, A.I., Burrows, M.T. and Genner, M.J. (2016) Fisheries stocks from an ecological perspective: Disentangling ecological connectivity from genetic interchange. Fisheries Research, 179, 333-341. (doi:10.1016/j.fishres.2016.01.015).

Record type: Article

Abstract

The concept of a stock of fish as a management unit has been around for well over a hundred years, and this has formed the basis for fisheries science. Methods for delimiting stocks have advanced considerably over recent years, including genetic, telemetric, tagging, geochemical and phenotypic information. In parallel with these developments, concepts in population ecology such as meta-population dynamics and connectivity have advanced. The pragmatic view of stocks has always accepted some mixing during spawning, feeding and/or larval drift. Here we consider the mismatch between ecological connectivity of a matrix of populations typically focussed on demographic measurements, and genetic connectivity of populations that focus on genetic exchange detected using modern molecular approaches. We suggest that from an ecological-connectivity perspective populations can be delimited as management units if there is limited exchange during recruitment or via migration in most years. From a genetic-connectivity perspective such limited exchange can maintain panmixia. We use case-studies of species endangered by overexploitation and/or habitat degradation to show how current methods of stock delimitation can help in managing populations and in conservation.

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More information

Accepted/In Press date: 20 January 2016
Published date: July 2016
Keywords: Marine stock assessment, Metapopulation, Telemetry, Molecular markers, Ecological connectivity
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 396488
URI: http://eprints.soton.ac.uk/id/eprint/396488
ISSN: 0165-7836
PURE UUID: f9648a01-c21f-44e1-a3a1-59e6d0bb34bf

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Date deposited: 06 Jun 2016 15:09
Last modified: 27 Apr 2022 08:41

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Contributors

Author: S.J. Hawkins
Author: K. Bohn
Author: D.W. Sims
Author: P. Ribeiro
Author: J. Faria
Author: P. Presa
Author: A. Pita
Author: G.M. Martins
Author: A.I. Neto
Author: M.T. Burrows
Author: M.J. Genner

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