Department of Biology, 7141 Sherbrooke St West, Concordia University, Montreal, QC H4B 1R6, Canada.
J Fish Biol. 2013 May;82(5):1514-22. doi: 10.1111/jfb.12082.
Microsatellite markers were used to test whether groups of pre-spawning adult brook trout Salvelinus fontinalis from the same population and captured at the same location during their breeding migration comprised kin. Only weak evidence for kin associations was found at the onset of breeding: the proportion of kin captured at the same location was low and similar to the proportion found across all locations and the average relatedness of S. fontinalis captured at the same location was low. A dilution of kin associations from the feeding to breeding phase is hypothesized to stem from mainly natural mortality that reduces family size by the adult stage. The results illustrate the dynamic nature of kin associations between consecutive life stages, even within the same fish population.
微卫星标记用于检验在繁殖洄游期间同一地点捕获的同一产卵前期成体溪红点鲑（Salvelinus fontinalis）群体是否存在亲缘关系。在繁殖开始时仅发现了亲缘关系的微弱证据：同一地点捕获的亲缘关系比例较低，与所有地点的比例相似，同一地点捕获的溪红点鲑的平均亲缘关系也较低。从摄食阶段到繁殖阶段亲缘关系的稀释被假设源于主要的自然死亡率，这会降低成体阶段的家族规模。研究结果表明，即使在同一鱼类群体中，连续生命阶段之间的亲缘关系也具有动态性。
