{"refrec":{"BRefID":117126,"RR":"<b>Beaumont, A.R.; Croucher, T.</b> (2006). Limited stock structure in UK populations of the brown shrimp, <i>Crangon crangon</i>, identified by morphology and genetics. <i>J. Mar. Biol. Ass. U.K. 86(5)</i>: 1107-1112. <a href=\"https://dx.doi.org/10.1017/S0025315406014081\" target=\"_blank\">https://dx.doi.org/10.1017/S0025315406014081</a>","BEntID":111439,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>J. Mar. Biol. Ass. U.K. 86(5)</i>: 1107-1112. <a href=\"https://dx.doi.org/10.1017/S0025315406014081\" target=\"_blank\">https://dx.doi.org/10.1017/S0025315406014081</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Beaumont, A.R.; Croucher, T.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Beaumont, A.R.; Croucher, T.","Englishabstract":"Population structure of the important commercial brown shrimp, <i>Crangon crangon</i>, 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 <i>C. crangon</i> 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. <i>Crangon crangon</i> 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 (F<sub>ST</sub>)=0.011). Data from three AFLP loci (Cra<sup>47</sup>), Cra<sup>56</sup>) and Cra<sup>70</sup>)) confirmed population differentiation (F <sub>ST</sub>=0.083) and combined allozyme and AFLP genetic data identified <i>C. crangon</i> 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. 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