Causes and Consequences of Straying into Small Populations of Pacific Salmon
Causes and Consequences of Straying into Small Populations of Pacific Salmon
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DOI：
10.1080/03632415.2017.1276356
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发表时间：
2017-04-01
期刊：
影响因子：
2.8
通讯作者：
Naman, Sean M.
中科院分区：
文献类型：
--
作者：
Bett, Nolan N.;Hinch, Scott G.;Naman, Sean M.
大部分太平洋鲑鱼。迁移到纳塔尔地产卵然而，有些会误入非出生栖息地并相互作用（例如，与其他种群的个体一起繁殖。几十年来，人们对太平洋鲑鱼的流浪进行了大量研究，特别是从捐赠流浪移民的人群的角度来看。然而，保护的后果主要是由接收流浪动物的种群经历的，最近有证据表明，在小的受体种群中，基因渗入的水平很高，这可能导致当地适应能力的丧失。流浪也可能提供人口救援效应的好处，可以挽救正在下降的受体种群免于灭绝。我们强调的影响，人口丰度的大小误入受体人口，并证明这一点，我们收集的证据，从一个小的人口红鲑O。加拿大不列颠哥伦比亚省的nerka。我们还审查了潜在的因素，可能会促进更高的供体流浪率，因此受体流浪。影响流浪的因素的证据是有限的，我们确定了几个知识差距，以及人为活动，可能会促进流浪。我们鼓励进一步讨论和研究受体偏离的潜在影响以及影响偏离率的因素。
Most Pacific salmon Oncorhynchus spp. migrate to their natal sites to spawn. Some, however, stray into nonnatal habitats and interact (e.g., reproduce) with individuals from other populations. Pacific salmon straying has been heavily studied for several decades, particularly from the perspective of the populations that donate the stray migrants. Conservation consequences are experienced primarily by the populations that receive strays, though, and there is recent evidence of significant levels of genetic introgression in small recipient populations, which could contribute to the loss of local adaptations. Straying may also provide the benefit of a demographic rescue effect that could save declining recipient populations from extirpation. We highlight the influence of population abundances on the magnitude of straying into recipient populations and demonstrate this using evidence we collected from a small population of Sockeye Salmon O. nerka in British Columbia, Canada. We also review potential factors that might promote higher donor stray rates and therefore recipient straying. Evidence of factors that affect straying is limited and we identify several knowledge gaps, as well as anthropogenic activities that could promote straying. We encourage further discussion and research on the potential effects of recipient straying and the factors that affect straying rates.