Socially cued developmental plasticity affects condition-dependent trait expression
Socially cued developmental plasticity affects condition-dependent trait expression
复制标题
社会暗示的发育可塑性影响条件依赖性特征表达
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
R. Brooks
中科院分区：
文献类型：
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作者：
M. Kasumovic;M. Hall;Heather Try;R. Brooks
条件依赖性选择的性状被认为是个体的质量或育种价值的健身。然而，发育环境的变化给资源分配带来了很大的复杂性，因此也给表型表达带来了复杂性。环境特异性的发展策略与资源分配的相互作用和对条件和成人表型之间的关系的影响程度在很大程度上仍然未经测试。在这里，我们使用的黑场蟋蟀（Teleogryllus commodus），一种已知的修改分配策略，以响应营养和社会环境，研究是否社会线索可塑性影响条件依赖的性状表达。我们在一个2乘2的析因实验中饲养了少年雄性，用2种饮食跨越2种社会环境，并检查了对生活史、形态特征和昂贵的性信号（即，在成年期（adult）虽然饮食显着影响表型在倒数第二个少年体育场，在最后一个少年体育场的营养和社会环境的发展速度的变化掩盖了条件对男性表型的影响。我们的研究结果表明，性选择的信号可能是个人素质的不良指标，由于环境方差的来源之间的相互作用。我们认为，性状表达和条件之间的相关性是更复杂的自然环境下，在这方面的大多数文献假设。
Condition-dependent sexually selected traits are thought to indicate an individual’s quality or breeding value for fitness. Variation in developmental environments, however, introduces much complexity to resource allocation, and therefore, to phenotypic expression. The extent to which environment-specific developmental tactics interact with resource allocation and impinge on the relationship between condition and adult phenotype remains largely untested. Here, we used the black field cricket (Teleogryllus commodus), a species known to modify allocation tactics in response to both nutrition and social environments, to examine whether socially cued plasticity affects condition-dependent trait expression. We reared juvenile males in a 2 by 2 factorial experiment, crossing 2 social environments with 2 diets, and examined allocation toward life-history, morphological traits and costly sexual signaling (i.e., calling) in adulthood. Although diet significantly affected phenotypes during the second-last juvenile stadium, shifts in development rate in response to both the nutrient and social environment during the last juvenile stadium obscured the effects of condition on male phenotypes. Our results suggest that sexually selected signals may be poor indicators of individual quality due to interactions among sources of environmental variance. We suggest that the correlation between trait expression and condition is more complex under natural environments than most literature in this area assumes.