Genetic variation in life-history reaction norms in a marine fish
Genetic variation in life-history reaction norms in a marine fish
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DOI：
10.1098/rspb.2007.0263
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发表时间：
2007-07-22
影响因子：
4.7
通讯作者：
Brown, Joseph A.
中科院分区：
文献类型：
--
作者：
Hutchings, Jeffrey A.;Swain, Douglas P.;Brown, Joseph A.
无论是适应性变化的规模，也不是差异人口对环境的反应的遗传基础是已知的广播产卵海洋鱼类。使用一个共同的花园实验协议，我们记录了幼虫的生长，生存和他们的反应规范之间的遗传差异四个种群的大西洋鳕鱼（Gadus morhua）。这些特征，以及它们对食物和温度的可塑性反应，在微卫星DNA未能检测到种群结构的空间尺度上是不同的。不同的生存反应规范表明，温水种群对食物的变化更敏感，而冷水种群对温度的变化更敏感。我们的研究结果表明，人口对环境变化的反应的方向和幅度都不需要在人口之间是相同的。适应性表型可塑性，以前没有记录的海洋鱼类，可以显着影响的概率恢复和持久性崩溃的人口，影响他们的能力，以应对自然和人为的环境变化。
Neither the scale of adaptive variation nor the genetic basis for differential population responses to the environment is known for broadcast-spawning marine fishes. Using a common-garden experimental protocol, we document how larval growth, survival and their norms of reaction differ genetically among four populations of Atlantic cod (Gadus morhua). These traits, and their plastic responses to food and temperature, differed across spatial scales at which microsatellite DNA failed to detect population structure. Divergent survival reaction norms indicate that warm-water populations are more sensitive to changes in food, whereas cold-water populations are more sensitive to changes in temperature. Our results suggest that neither the direction nor the magnitude of demographic responses to environmental change need be the same among populations. Adaptive phenotypic plasticity, previously undocumented in marine fishes, can significantly influence the probability of recovery and persistence of collapsed populations by affecting their ability to respond to natural and anthropogenic environmental change.