Modelled larval dispersal and measured gene flow : seascape genetics of the common cockle Cerastoderma edule in the southern Irish Sea

Coscia, I, Robins, PE, Porter, JS, Malham, SK and Ironside, JE 2013, 'Modelled larval dispersal and measured gene flow : seascape genetics of the common cockle Cerastoderma edule in the southern Irish Sea' , Conservation Genetics, 14 (2) , pp. 451-466.

[img] PDF - Published Version
Restricted to Repository staff only

Download (1MB) | Request a copy

Abstract

The role of marine currents in shaping population connectivity in the common cockle Cerastoderma edule was investigated in the southern Irish Sea. C. edule is one of the most valuable and exploited shellfish species in the area, yet very little is known about its population dynamics. In the present study, coupled hydrodynamic and particle tracking models are used in conjunction with genetic data collected at twelve microsatellite loci to estimate the influence of the Celtic Sea front on larval transport between the coasts of Britain and Ireland. Genetic analysis highlights the presence of at least three genetic clusters partitioned within locations, suggesting a contact zone between separate subpopulations. Samples collected from the Irish coast are most similar to each other. On the British coast, the Burry Inlet appears genetically isolated while samples collected from the coast of Pembrokeshire show evidence of connectivity between Britain and Ireland. These results agree with the model’s predictions: away from the coastal zone, residual baroclinic currents develop along tidal mixing fronts and act as conduit systems, transporting larvae great distances. Larvae spawned in south Wales are capable of travelling west towards Ireland due to the Celtic Sea front residual current, confirming the action of the Celtic Sea front on larval transport. Sheltered, flood-dominant estuaries such as the Burry Inlet promote self-recruitment. The validation of the model using genetic data represents progress towards a sustainable future for the common cockle, and paves the way for a more effective approach to management of all Irish Sea shellfisheries.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Journal or Publication Title: Conservation Genetics
Publisher: Springer
ISSN: 1566-0621
Related URLs:
Funders: European Union Regional Development Fund (ERDF)
Depositing User: Dr Ilaria Coscia
Date Deposited: 03 Jan 2018 13:38
Last Modified: 03 Jan 2018 15:53
URI: http://usir.salford.ac.uk/id/eprint/42987

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)

Downloads

Downloads per month over past year