Oosorption and migratory strategy of the milkweed bug, Oncopeltus fasciatus
Oosorption and migratory strategy of the milkweed bug, Oncopeltus fasciatus
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DOI：
10.1016/j.anbehav.2013.07.013
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发表时间：
2013-09-01
期刊：
影响因子：
2.5
通讯作者：
Moore, Patricia J.
中科院分区：
文献类型：
--
作者：
Attisano, Alfredo;Tregenza, Tom;Moore, Patricia J.
迁徙是对季节性不利环境的一种反应，但生殖生理学的可塑性是昆虫对资源贫乏条件作出反应的另一种途径。我们研究了个体迁移倾向的变化与女性生殖生理学调节的不良条件的反应水平之间的关系。我们测试的假设，移民相比，住宅行为与更高程度的表型可塑性oosorption，适应性生理机制，使女性未开发的卵母细胞收回资源。从生殖到生存的重新分配将使雌性跳过迁移，以科普不利的环境。如果这种可塑性是进化的，我们进一步预测它会在种群之间以及种群内部发生变化。我们研究的变化与迁移行为的女性从四个种群的马利筋错误，Oncopeltus fasciatus，使用行为分析，将女性分类为移民或居民，并观察这些群体之间的差异oosorption。正如预期的那样，食物的可用性，源人口和翅长影响的倾向迁移飞行，和食物的可用性影响的oosorption水平。我们还发现支持我们的关键预测，居民女性的特点是卵巢oosorption水平高于移民女性。我们的研究为移民女性和居民女性之间的生理差异提供了支持，并表明存在生理和行为策略，这些策略与移民的潜力相互作用，以适应季节性的挑战性环境。(C)2013年，动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
Migration evolves as a response to seasonally unfavourable environments but plasticity in reproductive physiology is another avenue by which insects can respond to resource-poor conditions. We investigated the relationship between individual variation in migratory propensity and the level of response to poor conditions modulated by the female reproductive physiology. We tested the hypothesis that, compared to migrants, residential behaviour is associated with a higher degree of phenotypic plasticity in oosorption, an adaptive physiological mechanism that allows females to recoup resources from undeveloped oocytes. Reallocation from reproduction to survival would allow females to skip migration and to cope with unfavourable environments. If this plasticity is evolved, we further predicted it would vary between as well as within populations. We examined variation associated with migratory behaviour in females from four populations of the milkweed bug, Oncopeltus fasciatus, using a behavioural assay to categorize females as either migrant or resident and observing the differences in oosorption between these groups. As expected, food availability, source population and wing length influenced the propensity for migratory flight, and food availability influenced levels of oosorption. We also found support for our key prediction that resident females are characterized by higher levels of ovarian oosorption than migrant females. Our study provides support for a physiological difference between migrant and resident females and suggests the presence of both physiological and behavioural tactics that interact with the potential for migration to provide adaptation to seasonally challenging environments. (C) 2013 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.