Census and effective population sizes of white-spotted charr (Salvelinus leucomaenis) in a fragmented landscape
Census and effective population sizes of white-spotted charr (Salvelinus leucomaenis) in a fragmented landscape
复制标题
破碎景观中白点红点鲑 (Salvelinus leucomaenis) 的普查和有效种群规模
DOI：
10.1111/eff.12239
复制
发表时间：
2016
影响因子：
1.8
通讯作者：
Tomoyuki Nakamura
中科院分区：
文献类型：
--
作者：
Shoichiro Yamamoto;Hitoshi Kubota;Koh Hasegawa;Tomoyuki Nakamura
几种生境模型已被提出来预测种群规模的溪流鱼类，并指导生境评估和监测技术。然而，大多数模型没有纳入分子遗传标记的潜在优势。我们进行了实地调查和微卫星DNA分析，以量化的遗传多样性，人口普查/有效人口规模和生境变量之间的关系在分散的白色斑点红点鲑（Salvelinus leucomaenis）。人口普查的规模显着增加的流长度，池和池-浅滩序列指数，通道单元栖息地类型的复杂性的代理内达到的数量。种群密度仅与合并-分型序列指数相关。遗传多样性和有效种群大小与生境变量或普查种群大小不相关。研究人群中缺乏按距离隔离的人群结构。我们的研究结果表明，与栖息地复杂性相关的河段内的河流长度和游泳池数量是解释白色斑点红点鲑种群规模变化的主要栖息地变量。我们的研究结果提供了进一步的证据，人口普查人口sizeper sea是一个穷人的指标，在一个破碎的景观种群内的包容性遗传多样性。
Several habitat models have been proposed to predict population size for stream fishes and to guide habitat assessment and monitoring techniques. However, most models do not incorporate the potential advantage of molecular genetic markers. We conducted a field survey and microsatellite DNA analyses to quantify the relationships among genetic diversity, census/effective population size and habitat variables in fragmented populations of white‐spotted charr (Salvelinus leucomaenis). The census population size significantly increased with the stream length, the number of pools and a pool‐riffle sequence index, a proxy for channel‐unit habitat type complexity within reaches. Population density was correlated with the pool‐riffle sequence index only. Genetic diversity and effective population size were not correlated with the habitat variables or census population size. There was a lack of isolation‐by‐distance population structure in the studied populations. Our results suggest that stream length and the number of pools within reaches associated with habitat complexity are the habitat variables that explain the majority of variation in population size of white‐spotted charr. Our findings provide further evidence that census population sizeper seis a poor indicator of the inclusive genetic diversity within populations in a fragmented landscape.