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Morph-Specific Fecundity and Egg Size in the Female-Dimorphic Damselfly Ischnura senegalensis

机译：雌性异形蜻蜓Ischnura senegalensis的形态特异性生殖力和卵大小

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摘要

Females of coenagrionid damselflies exhibit color dimorphism, consisting of an andromorph and a gynomorph. This study compared reproductive traits between the female morphs in both field-captured and laboratory-reared females of the female-dimorphic damselfly Ischnura senegalensis. No difference was found in the onset of egg development between the morphs. The andromorphs developed significantly smaller mature eggs and had significantly more immature eggs than the gynomorphs. These results suggest that the andromorphs are r-strategists (high fecundity with small eggs), whereas the gynomorphs are K-strategists (low fecundity with large eggs). Fecundity and egg size might determine the quantity and quality of the offspring, respectively, indicating that morph-specific reproductive traits would contribute to the overall fitness of each female morph, and consequently be key factors affecting morph frequency in a population.
机译：雌性Coenagrionid豆娘表现出双色性，由雄性和雌性组成。这项研究比较了雌性二态豆娘Ischnura senegalensis的野外捕获和实验室饲养的雌性中雌性形态的生殖特征。变体之间的卵发育开始没有发现差异。与雌雄同体相比，雄同体发育出的成熟卵明显较小，未成熟卵明显多。这些结果表明，雄激素是r-策略家（卵小，高繁殖力），而雌雄同体是K-策略师（大卵，低繁殖力）。繁殖力和卵的大小可能分别决定后代的数量和质量，这表明特定形态的生殖性状将有助于每个雌性形态的整体适应性，因此是影响种群中形态频率的关键因素。

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