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首页> 美国卫生研究院文献>other >Conservation Genetics of Threatened Hippocampus guttulatus in Vulnerable Habitats in NW Spain: Temporal and Spatial Stability of Wild Populations with Flexible Polygamous Mating System in Captivity
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Conservation Genetics of Threatened Hippocampus guttulatus in Vulnerable Habitats in NW Spain: Temporal and Spatial Stability of Wild Populations with Flexible Polygamous Mating System in Captivity

机译：西班牙西北部脆弱生境中受到威胁的海马guttulatus的保护遗传学：人工灵活的一夫多妻配偶系统对野生种群的时空稳定性

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This study was focused on conservation genetics of threatened Hippocampus guttulatus on the Atlantic coast of NW Iberian Peninsula. Information about spatial structure and temporal stability of wild populations was obtained based on microsatellite markers, and used for monitoring a captive breeding program firstly initiated in this zone at the facilities of the Institute of Marine Research (Vigo, Spain). No significant major genetic structure was observed regarding the biogeographical barrier of Cape Finisterre. However, two management units under continuous gene flow are proposed based on the allelic differentiation between South-Atlantic and Cantabrian subpopulations, with small to moderate contemporary effective size based on single-sample methods. Temporal stability was observed in South-Atlantic population samples of H. guttulatus for the six-year period studied, suggesting large enough effective population size to buffer the effects of genetic drift within the time frame of three generations. Genetic analysis of wild breeders and offspring in captivity since 2009 allowed us to monitor the breeding program founded in 2006 in NW Spain for this species. Similar genetic diversity in the renewed and founder broodstock, regarding the wild population of origin, supports suitable renewal and rearing processes to maintain genetic variation in captivity. Genetic parentage proved single-brood monogamy in the wild and in captivity, but flexible short- and long-term mating system under captive conditions, from strict monogamy to polygamy within and/or among breeding seasons. Family analysis showed high reproductive success in captivity under genetic management assisted by molecular relatedness estimates to avoid inbreeding. This study provides genetic information about H. guttulatus in the wild and captivity within an uncovered geographical range for this data deficient species, to be taken into account for management and conservation purposes.
机译：这项研究的重点是西北伊比利亚半岛大西洋沿岸濒危海马guttulatus的保护遗传学。基于微卫星标记获得了有关野生种群空间结构和时间稳定性的信息，并将其用于监测海洋研究所（西班牙维戈）首次在该区域启动的圈养繁殖计划。关于Cape Finisterre的生物地理障碍，未观察到重要的主要遗传结构。但是，根据南大西洋和坎塔布连亚人群之间的等位基因差异，提出了两个连续基因流下的管理单位，基于单样本方法，当代有效规模小到中等。在研究的六年期中，在南大西洋居特古拉特斯种群样本中观察到时间稳定性，这表明足够大的有效种群数量可以在三代的时间内缓冲遗传漂移的影响。自2009年以来，通过对野生育种者和人工圈养后代的遗传分析，我们得以监控2006年在西班牙西北部针对该物种建立的育种计划。在更新后的和原始的亲鱼中，关于野生原种群的相似遗传多样性支持适当的更新和饲养过程，以保持圈养的遗传变异。遗传育种证明了在野外和人工圈养中的单亲一夫一妻制，但在人工条件下，从严格的一夫一妻制到繁殖季节内的一夫多妻制，在灵活的短期和长期交配系统下都是如此。家庭分析显示，在遗传管理下，通过分子相关性估计避免近交繁殖，圈养的繁殖成功率很高。这项研究为该数据不足的物种提供了有关野生古特山羊和圈养在未发现地理范围内的遗传信息，可将其用于管理和保护目的。

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