The frequency of reproduction and homing success are crucial in determining the lifetime reproductive fitness of iteroparous salmonids. We examined consecutive spawning and homing by Sakhalin taimen (Parahucho perryi), one of the least-studied iteroparous salmonids. The average consecutive return rate was 69.5%, the highest ever reported for an iteroparous salmonid. The consecutive return rates were highest for large spawners, females, and individuals with active inter-tributary movements in the preceding year. We estimated tributary-scale repeat homing rates to be 50–87%, which was significantly higher than expected by chance alone. The repeat homing rates were higher for spawners that entered tributaries with more abundant spawners in the preceding year, which is consistent with the pheromone hypothesis because the abundance of spawners in a tributary is expected to correlate to the concentration of chemical homing cues emanating from offspring in the following year. These extremely high consecutive return and homing rates likely facilitated local adaptation over evolutionary time scales and have contributed to population stability in this river system. These same traits, however, may impede species recovery following habitat restoration efforts within the species historic range (e.g. dam barrier removal or improved passage) due to their limited rate of dispersal.

繁殖的频率和归巢成功对决定鲑状鲑鱼的终生繁殖适应性至关重要。我们检查了萨哈林（Sakhalin taimen）（Parahucho perryi）的连续产卵和归巢），是研究最少的同质鲑鱼之一。平均连续回报率为69.5％，是有报道的同质鲑鱼的最高回报率。大型产卵者，雌性和前一年活跃的个体间活动的个体的连续回报率最高。我们估计支流规模的重复归巢率为50-87％，大大高于偶然的预期。在上一年中进入支流且产卵量更多的产卵子的重复归巢率较高，这与信息素假设相符，因为预计支流中的产卵量与后代产生的化学归巢信号的浓度相关。次年。这些极高的连续返回率和归巢率可能促进了进化时间尺度上的局部适应，并为该河流系统的人口稳定做出了贡献。但是，由于它们的分散速度有限，这些相同的性状可能会在物种历史范围内的栖息地恢复工作（例如，清除大坝障碍物或改善通道）后阻碍物种恢复。