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首页> 美国卫生研究院文献>other >Population Structure Genetic Diversity Effective Population Size Demographic History and Regional Connectivity Patterns of the Endangered Dusky Grouper Epinephelus marginatus (Teleostei: Serranidae) within Malta’s Fisheries Management Zone
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Population Structure Genetic Diversity Effective Population Size Demographic History and Regional Connectivity Patterns of the Endangered Dusky Grouper Epinephelus marginatus (Teleostei: Serranidae) within Malta’s Fisheries Management Zone

机译：马耳他渔业管理区内濒危的暗色石斑鱼（Epinephelus marginatus（Teleostei：Serranidae））的种群结构遗传多样性有效种群规模人口历史和区域连通性模式

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The objective of this study is to describe the genetic population structure and demographic history of the endangered marine fish, Epinephelus marginatus, within Malta’s Fisheries Management Zone for the purpose of localised conservation planning. Epinephelus marginatus is a long-lived, sedentary, reef-associated protogynous hermaphrodite with high commercial and recreational value that is at risk of extinction throughout its global distribution. Based on global trends, population substructuring and gaps in local knowledge this has led to an increased interest in evaluation of local stock. Assessment of Maltese demography was based on historical and contemporary catch landings data whilst genetic population structure and regional connectivity patterns were evaluated by examining 175 individuals collected within the central Mediterranean region between 2002 and 2009 using 14 nuclear microsatellite loci. Demographic stock assessment of Maltese E. marginatus’ revealed a 99% decline in catch landings between 1947 and 2009 within the Fisheries Management Zone. A contemporary modest mean size was observed, 3 ± 3 kg, where approximately 17% of the population was juvenile, 68% female/sex-changing and 15% were male with a male-to-female sex ratio of 1:5. Genetic analysis describes the overall population of E. marginatus’ within the Fisheries Management Zone as decreasing in size (ƟH = 2.2), which has gone through a significant size reduction in the past (M = 0.41) and consequently shows signs of moderate inbreeding (FIS = 0.10, p < 0.001) with an estimated effective population size of 130 individuals. Results of spatially explicit Bayesian genetic cluster analysis detected two geographically distinct subpopulations within Malta’s Fisheries Management Zone and that they are connected to a larger network of E. marginatus’ within the Sicily Channel. Results suggest conservation management should be designed to reflect E. marginatus’ within Malta’s Fisheries Management Zone as two management units.
机译：这项研究的目的是描述马耳他渔业管理区内濒临灭绝的海鱼Epinephelus marginatus的遗传种群结构和人口历史，以进行局部保护计划。蓝鳍金枪鱼是一种长寿的，久坐的，与珊瑚礁相关的原生雌雄同体的雌雄同体，具有很高的商业和娱乐价值，在其全球分布中有灭绝的危险。根据全球趋势，人口结构变化和当地知识的不足，这导致人们对评估当地存量的兴趣增加。马耳他人口统计学的评估是基于历史和当代渔获量着陆数据，而遗传种群结构和区域连通性模式是通过使用14个核微卫星基因座检查了2002年至2009年之间在地中海中部地区收集的175个人来评估的。根据对马耳他E.marginatus的种群进行的种群评估，在1947年至2009年之间，渔业管理区内的渔获量下降了99％。观察到当代的平均大小为3±3公斤，其中大约17％的人口为少年，68％的女性/性行为改变和15％的男性为男女，性别比为1：5。遗传分析表明，渔业管理区内边缘大肠杆菌的总体种群正在减少（populationH = 2.2），过去该种群的大小已显着减少（M = 0.41），因此显示了近亲繁殖的迹象（ FIS = 0.10，p <0.001），有效人口估计为130个人。空间明确的贝叶斯遗传聚类分析结果在马耳他的渔业管理区内发现了两个地理上不同的亚种群，并且它们与西西里海峡内的一个更大的边缘大肠埃希氏菌网络相连。结果表明，养护管理应设计为反映马耳他渔业管理区内的边缘大肠杆菌作为两个管理单位。

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