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Microsatellite analysis of genetic diversity in the squid Illex argentinus during a period of intensive fishing

Adcock, Greg J.; Shaw, Paul W.; Rodhouse, Paul G.; Carvalho, Gary R.. 1999 Microsatellite analysis of genetic diversity in the squid Illex argentinus during a period of intensive fishing. Marine Ecology Progress Series, 187. 171-178. 10.3354/meps187171

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Abstract/Summary

Levels of genetic diversity and population differentiation were examined in temporally (1990 to 1997) and geographically separated samples of the argentine short-finned squid Illex argentines using 7 microsatellite loci. Number of alleles (mean number of alleles per locus over all samples = 24.1) and heterozygosity (mean observed heterozygosity per sample = 0.84) were high for all samples, indicating that these loci have a greater potential utility for investigating population genetic structure than allozyme markers used in previous studies. Genetic diversity did not differ significantly between samples taken 5 yr after commencement of the fishery (1990) and those collected during a period of progressively intense fishing pressure (1994 and 1997). Several small but significant differences in between-sample genetic variation (FsTw) were observed, but these could not confirm the previous suggestion of cryptic species or several well-defined stocks within the fished population.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.3354/meps187171
Programmes: BAS Programmes > Pre 2000 programme
ISSN: 0171-8630
Additional Keywords: microsatellite, genetic diversity, Illex argentines, squid, population genetics, fishing
Date made live: 20 Aug 2013 08:26 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/502995

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