Phenotypic plasticity during external embryonic development is affected more by maternal effects than multiple abiotic factors in brook trout
Phenotypic plasticity during external embryonic development is affected more by maternal effects than multiple abiotic factors in brook trout
复制标题
鳟鱼外部胚胎发育过程中的表型可塑性更多地受到母体效应的影响，而不是多种非生物因素的影响
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
C. Purchase
中科院分区：
文献类型：
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作者：
H. Penney;J. Beirão;C. Purchase
目的：母体(代际)效应和表型可塑性在早期生活史中很重要。然而，大多数文献都集中在其中之一。我们研究了母体效应和上下文相关的表型可塑性对发育中的鲑鱼胚胎的早期生活史特征(孵化时间和大小)的贡献。假设：(1)环境效应比母体效应对孵化时间的影响更大。(2)母体效应对孵化个体大小的影响大于环境效应。(3)卵大小影响孵化时间和孵化个体大小的可塑性。方法：在裂窝共园实验中，将鲑鱼胚胎分别培养在两种温度下：稳定温度(5℃)和波动温度(2~8℃，平均5℃)，以及两种pH值：良性(6.5)和压力(5.25)。结果：环境变量影响孵化时间，变温/良性pH处理组合的孵化范围明显长于其他处理组合(孵化同步性降低)。然而，母体效应(卵大小)盖过了环境对孵化大小的影响。更大的蛋会产生更长的孵化出的蛋。此外，较大的卵子更具可塑性，这表明母体效应影响了可塑性程度。
Purpose: Maternal (transgenerational) effects and phenotypic plasticity are important in early life history. However, most of the literature focuses on one or the other. We examined the contribution of maternal effects and context-dependent phenotypic plasticity on early life-history traits (hatch time and size) in developing brook trout (Salvelinus fontinalis) embryos. Hypotheses: (1) Environmental effects have more of an impact on hatch time than maternal effects. (2) Maternal effects have more of an impact on hatchling size than environmental effects. (3) Egg size affects the degree of plasticity of hatch time and hatchling size. Methods: In a split-brood common-garden experiment, brook trout embryos were individually incubated in four treatments consisting of two temperatures: stable (5 C) and fluctuating (range 2 to 8 C, mean 5 C), and two pH values: benign (6.5) and stressful (5.25). Results: The environmental variables affected hatch time in that the fluctuating-temperature/ benign-pH treatment combination had a significantly longer hatch range (decreased hatching synchrony) than the other treatment combinations. However, maternal effects (egg size) overshadowed environmental effects on hatch size. Larger eggs produced longer hatchlings. In addition, larger eggs were more plastic, suggesting maternal effects influenced the degree of plasticity.
部分迁徙物种的饮食引起的形态和生长灵活性的差异
影响因子：
2.4
作者：
Van Leeuwen T
通讯作者：
Van Leeuwen T
影响因子：
5.2
作者：
Ezard, Thomas H. G.;Prizak, Roshan;Hoyle, Rebecca B.
通讯作者：
Hoyle, Rebecca B.