Mothers determine offspring size in response to own juvenile growth conditions
Mothers determine offspring size in response to own juvenile growth conditions
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DOI：
10.1098/rsbl.2005.0422
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发表时间：
2006-06-22
期刊：
影响因子：
3.3
通讯作者：
Taborsky, Barbara
中科院分区：
文献类型：
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作者：
Taborsky, Barbara
通过非遗传的母体效应，母亲可以使后代的表型适应年轻人成长的环境。如果幼年和成年生态不同，母亲幼年时所经历的条件可能比母亲成年时的环境更能预测其后代的环境。在这种情况下，母亲对后代质量投资的决定应该在母亲的少年阶段就已经确定。我测试了这一假设，操纵少年和成年人独立的慈鲷鱼母性环境。在恶劣的环境中提出的女性产生更大的年轻女性提出没有食物限制，无论在成年期间经历的喂养条件。这一母体增长是由于对卵的投资增加和幼虫生长加快。显然，母亲为她们的后代准备了类似的环境条件，就像她们在幼年时遇到的那样。这一解释得到了这些鱼类在自然条件下的分布的支持。与成年人相比，青少年生活在不同的、范围更窄的生境中。因此，栖息地的母亲经历作为青少年将使他们能够预测他们的后代的环境比成年人的家庭范围的条件。
Through non-genetic maternal effects, mothers can tailor offspring phenotype to the environment in which young will grow up. If juvenile and adult ecologies differ, the conditions mothers experienced as juveniles may better predict their offspring's environment than the adult environment of mothers. In this case maternal decisions about investment in offspring quality should already be determined during the juvenile phase of mothers. I tested this hypothesis by manipulating juvenile and adult maternal environments independently in a cichlid fish. Females raised in a poor environment produced larger young than females raised without food limitations, irrespective of the feeding conditions experienced during adulthood. This maternal boost was due to a higher investment in eggs and to faster larval growth. Apparently, mothers prepare their offspring for similar environmental conditions to those they encountered as juveniles. This explanation is supported by the distribution of these fishes under natural conditions. juveniles live in a different and much narrower range of habitats than adults. Therefore, the habitat mothers experienced as juveniles will allow them to predict their offspring's environment better than the conditions in the adult home range.