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Limited stock structure in UK populations of the brown shrimp, Crangon crangon, identified by morphology and genetics Beaumont, A.R.; Croucher, T. (2006). Limited stock structure in UK populations of the brown shrimp, Crangon crangon, identified by morphology and genetics. J. Mar. Biol. Ass. U.K. 86(5): 1107-1112. https://dx.doi.org/10.1017/S0025315406014081 In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154; e-ISSN 1469-7769

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Beschikbaar in	Auteurs
VLIZ: Non-open access 300316 [ aanvragen ]

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Trefwoorden

ANE, British Isles, England Biology > Genetics > Population genetics Biology > Organism morphology > Animal morphology Biopolymorphism Cell constituents > Chromosomes > Genes > Allelles Enzymes > Allozymes Fauna > Aquatic organisms > Aquatic animals > Shellfish > Marine organisms > Marine crustaceans Morphometry Taxa > Species > Commercial species Crangon crangon (Linnaeus, 1758) [WoRMS] England [Marine Regions] Marien/Kust

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Auteurs		Top
Beaumont, A.R. Croucher, T.

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Abstract

Population structure of the important commercial brown shrimp, Crangon crangon, was investigated in samples from five UK sites using a multidisciplinary approach based on morphometrics, allozyme electrophoresis and amplified fragment length polymorphism (AFLP). Multivariate analysis of the morphometric data revealed variation in the tail shape of C. crangon from Wansbeck (north-east England), which was found to have longer inner uropod and telson lengths in comparison with all other sites. Linear discriminant analysis was also able to place 86% of the Wansbeck individuals in the correct group. Crangon crangon were screened at two allozyme loci (Gpi and Pgm) revealing higher levels of polymorphism at both loci than previously reported. Allozyme allele frequencies showed evidence of population subdivision between east and west coast UK sites (FST)=0.011). Data from three AFLP loci (Cra47), Cra56) and Cra70)) confirmed population differentiation (F ST=0.083) and combined allozyme and AFLP genetic data identified C. crangon from Wansbeck as different from all other sites. Random genetic drift and selection in populations with restricted gene flow are likely to be the main causes of the differentiation observed. The results do not support an earlier report of six distinct populations based solely on morphometric analysis.

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