Links between paternal life history and offspring metabolic rate and body size during early life in masu salmon Oncorhynchus masou
Links between paternal life history and offspring metabolic rate and body size during early life in masu salmon Oncorhynchus masou
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马苏鲑鱼 Oncorhynchus masou 父亲生活史与后代代谢率和体型之间的联系
DOI：
10.1111/eff.12584
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发表时间：
2021
影响因子：
1.8
通讯作者：
D. Kishi
中科院分区：
文献类型：
--
作者：
T. Yamamoto;S. Kitanishi;S. Masato;M. Yagisawa;D. Kishi
后代的生长受到母代和父代基因型的极大影响。然而，尽管母体基因型对后代生长的影响已得到广泛认可，但母体基因型的生态学研究尚未关注其与生理性状的联系，特别是在胚胎阶段。在本研究中，我们基于马苏鲑oncorhynchus masou的代谢率，进行了三个实验，以确定两种截然不同的父亲生活史特征（溯河产卵的雄性洄游到海洋后返回其出生河流产卵，而居住的雄性在河流中成熟而不洄游到海洋）对后代早期生长的影响。在第一个实验中，研究人员比较了24个同父异母的兄弟姐妹受精卵的代谢率。结果表明，常住雄性后代的胚胎代谢率高于雌性后代。在第二个实验中，我们比较了133只半同胞在卵黄囊吸收阶段的体型。常住雄虫的后代体型较大，这可能与胚胎期代谢率差异和父系生活史有关。在第三个试验中，在卵黄囊吸收期观察到的体尺寸差异与苗种饲养60 d后的生长呈正相关。我们的研究结果与之前的研究结果相结合，即生长更快的雄性往往会成为更年轻的常驻雄性，因此与早期生长和相关特征（如代谢率）是一致的，这些特征可以从雄性亲本遗传给后代。
Offspring growth is greatly influenced by both the maternal and paternal genotypes. However, although the effects of maternal genotype on offspring growth are recognised widely, ecological studies of the paternal genotype have not focused on the links with physiological traits, especially at the embryo stage. In this study, we conducted three experiments to determine the effects of two contrasting paternal life history traits (anadromous males, which return to their natal rivers for spawning after migrating to the sea, and resident males, which mature in rivers without migrating to the sea) on offspring growth during early life based on the metabolic rate in masu salmonOncorhynchus masou. In the first experiment, metabolic rates of fertilised eggs were compared between 24 half‐sibships. Results suggested that the metabolic rate of embryos was higher for the offspring of resident males than of anadromous males. In the second experiment, the body sizes of 133 half‐sibships at the yolk‐sac absorption stage were compared. The offspring from the resident males were larger, which could be related to metabolic rate differences at the embryo stage associated with paternal life history. In the third experiment, the differences in body size observed at the yolk‐sac absorption stage were positively correlated with growth after 60 days of fry rearing. Our findings, taken together with previous demonstrations that faster‐growing males tend to become younger resident males, are thus consistent with early growth and associated traits, such as metabolic rate, being heritable from the male parent to the offspring.