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Egg size of skippers (Lepidoptera: Hesperiidae) in relation to their host specificity and to leaf toughness of host plants
Authors:Fusao Nakasuji
Institution:(1) Laboratory of Applied Entomology, Faculty of Agriculture, Okayama University, 700 Okayama, Japan
Abstract:The adaptive significance of egg size of skippers (Lepidoptera; Hesperiidae) in Japan was evaluated in relation to the leaf toughness of their major host grasses. The hesperids that fed on tougher grasses laid larger eggs. Hesperids that laid larger eggs were larger in body size, but lower in fecundity. They also had a wider host range. Thus, despite the lower fecundity, hesperids may benefit from large eggs by having a wider host range of larvae. Grass feeders had wider range of host plants than broadleaf feeders.
Keywords:Egg size  Evolution  Hesperiidae  Host specificity  Leaf toughness
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