The new kid on the block: immigrant males win big whereas females pay fitness cost after dispersal.
The new kid on the block: immigrant males win big whereas females pay fitness cost after dispersal.
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新来的孩子：男性移民赢得了巨大的胜利，而女性则在分散后支付健身费用。
DOI：
10.1111/ele.13436
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发表时间：
2019
期刊：
影响因子：
8.8
通讯作者：
S. Boutin
中科院分区：
文献类型：
--
作者：
A. Martinig;A. McAdam;B. Dantzer;J. Lane;D. Coltman;S. Boutin
扩散几乎是普遍存在的；然而，哪种性别往往更倾向于扩散以及它们之后的成功取决于扩散的适合度后果。我们利用在加拿大对北美红松鼠（Tamiasciurus hudsonicus）进行的29年监测，询问了本地个体和迁入个体（成功的种群间扩散者）及其后代的终生适合度是否存在差异。与本地个体相比，迁入的雌性终生繁殖成功率（LBS）低23%，而迁入的雄性终生繁殖成功率高29%。雄性迁入和雌性留居更受青睐。迁入个体所生育的后代比本地个体所生育的后代终生繁殖成功率低15 - 43%。我们得出结论，迁入对雄性有益，但对雌性无益，雌性似乎是在不利的情况下尽力而为。我们的研究结果与雄性偏向性扩散是由本地配偶竞争和本地资源增强所驱动的这一观点相符，而迁入的代际成本是解释性别偏向性扩散驱动因素的一个新的复杂情况。
Dispersal is nearly universal; yet, which sex tends to disperse more and their success thereafter depends on the fitness consequences of dispersal. We asked if lifetime fitness differed between residents and immigrants (successful between-population dispersers) and their offspring using 29 years of monitoring from North American red squirrels (Tamiasciurus hudsonicus) in Canada. Compared to residents, immigrant females had 23% lower lifetime breeding success (LBS), while immigrant males had 29% higher LBS. Male immigration and female residency were favoured. Offspring born to immigrants had 15-43% lower LBS than offspring born to residents. We conclude that immigration benefitted males, but not females, which appeared to be making the best of a bad lot. Our results are in line with male-biased dispersal being driven by local mate competition and local resource enhancement, while the intergenerational cost to immigration is a new complication in explaining the drivers of sex-biased dispersal.
影响因子：
8.8
作者：
Burton, Olivia J.;Phillips, Ben L.;Travis, Justin M. J.
通讯作者：
Travis, Justin M. J.