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首页> 外文期刊>Marine biology >Are local extinctions and recolonizations continuing at the colder limits of marine fish distributions? Halobatrachus didactylus (Bloch & Schneider, 1801), a possible candidate
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Are local extinctions and recolonizations continuing at the colder limits of marine fish distributions? Halobatrachus didactylus (Bloch & Schneider, 1801), a possible candidate

机译：在海洋鱼类分布的寒冷极限下，当地的灭绝和再殖民化是否还在继续？ Halobatrachus didactylus（Bloch＆Schneider，1801），可能的候选人

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摘要

In this paper, we compare the populations of the Lusitanian toadfish Halobatrachus didactylus along the Portuguese shore, using a putative fragment of the mito-chondrial control region and the first intron of the S7 ribosomal protein gene. This demersal species ranges from the tropical West African coast to the Iberian Peninsula and the Mediterranean, having its northern limit in the Tagus River. For the putative control region, a single haplotype occurs in all fish from Tagus and Sado (the location immediately to the south) with a clear increase in diversity to the South, peaking at Algarve (south Portugal). The data seem to point to a very recent Holocenic colonization of Tagus and Sado from the South (possibly Algarve). We suggest that even small oscillations in sea surface temperature (SST) may cause local extinctions and subsequent recolonizations in populations of thermophilic fish that are at the cold limit of their distributions.
机译：在本文中，我们使用线粒体控制区的推定片段和S7核糖体蛋白基因的第一个内含子，比较了葡萄牙海岸沿岸的Lusitanian蟾鱼Halobatrachus didactylus的种群。这种沉没物种范围从热带西非海岸到伊比利亚半岛和地中海，在塔霍河以北为界。对于假定的控制区域，来自塔霍斯和佐渡（紧邻南部的位置）的所有鱼类均发生单一单体型，向南部的多样性明显增加，在阿尔加维（葡萄牙南部）达到顶峰。数据似乎指向最近从南部（可能是阿尔加威）的塔霍斯和佐渡的全新世殖民。我们建议，即使海面温度（SST）出现小幅波动，也可能导致嗜热鱼类种群处于局部绝种并随后重新定殖，而这些种群处于其分布的寒冷极限。

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  • 来源
    《Marine biology》 |2013年第9期|2461-2467|共7页
  • 作者

    Joana I. Robalo; Ana M. Crespo; Rita Castilho; Sara M. Francisco; Maria C. P. Amorim; Vitor C. Almada;

  • 作者单位

    Unidade de Investigacao em Eco-Etologia, ISPA-Institute Universitario, Rua Jardim do Tabaco 34, 1149-041 Lisbon, Portugal;

    Unidade de Investigacao em Eco-Etologia, ISPA-Institute Universitario, Rua Jardim do Tabaco 34, 1149-041 Lisbon, Portugal;

    Centro de Ciencias do Mar (CCMAR, CIMAR Associate Laboratory), Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal;

    Unidade de Investigacao em Eco-Etologia, ISPA-Institute Universitario, Rua Jardim do Tabaco 34, 1149-041 Lisbon, Portugal;

    Unidade de Investigacao em Eco-Etologia, ISPA-Institute Universitario, Rua Jardim do Tabaco 34, 1149-041 Lisbon, Portugal;

    Unidade de Investigacao em Eco-Etologia, ISPA-Institute Universitario, Rua Jardim do Tabaco 34, 1149-041 Lisbon, Portugal;

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