Roldán M I, Heras S, Patellani R, Maltagliati F
Departament de Biologia, Universitat de Girona, 17071 Girona, Spain.
Genetica. 2009 May;136(1):1-4. doi: 10.1007/s10709-008-9330-2. Epub 2008 Nov 12.
In this paper we addressed the phylogeographical genetic structure of the economically important red shrimp, Aristeus antennatus (Crustacea, Aristeidae) in the Western Mediterranean. Partial mitochondrial regions of the cytochrome c oxidase subunit I (514 bp) and ribosomal 16S subunit (547 bp) were sequenced in 137 individuals collected at three localities: Catalan Sea, Ligurian Sea and the southern Tyrrhenian Sea. Values of haplotypic diversity were h = 0.552-0.724, whereas those for nucleotide diversity were pi = 0.0012-0.0026. Among-sample genetic diversity was not significant and no geographical patterns in the distribution of haplotypes were apparent. Results of the present study are consistent with a past population expansion that occurred <2,000 years ago. Despite the current fishing pressure, genetic variability appears to be sufficiently high to keep A. antennatus populations stable over time. Dispersal-related life history traits may account for the shallow genetic structure. Our results are not in contrast with the hypothesis of sustainability of Western Mediterranean red shrimp fisheries predicted on the basis of previously obtained biological results.
在本文中，我们研究了西地中海经济上重要的红虾（Aristeus antennatus，甲壳纲，阿里斯特虾科）的系统地理学遗传结构。对从加泰罗尼亚海、利古里亚海和第勒尼安海南部三个地点采集的137个个体的细胞色素c氧化酶亚基I（514 bp）和核糖体16S亚基（547 bp）的部分线粒体区域进行了测序。单倍型多样性值为h = 0.552 - 0.724，而核苷酸多样性值为pi = 0.0012 - 0.0026。样本间的遗传多样性不显著，单倍型分布也没有明显的地理模式。本研究结果与2000年前发生的种群扩张一致。尽管目前存在捕捞压力，但遗传变异性似乎足够高，足以使红虾种群长期保持稳定。与扩散相关的生活史特征可能是遗传结构浅薄的原因。我们的结果与基于先前获得的生物学结果预测的西地中海红虾渔业可持续性假说并不矛盾。
