Applied Entomology and Zoology
Online ISSN : 1347-605X
Print ISSN : 0003-6862
ISSN-L : 0003-6862
Regular Papers
Effect of egg size variation on survival rate, development and fecundity of offspring in a migrant skipper, Parnara guttata guttata (Lepidoptera: Hesperiidae)
Tomokazu SekoFusao Nakasuji
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2004 Volume 39 Issue 1 Pages 171-176


Life history traits of Parnara guttata guttata hatched from large-sized and small-sized eggs were compared. Eggs were grouped into two sizes, larger than 0.19 mm3 (L group) and smaller than 0.16 mm3 (S group). Larvae from these groups were reared individually under a 16L8D photoperiod at 25°C. The survival rate in immature stages was significantly higher in the L group than the S group. Although not significant, the developmental time during immature stages of the L group was shorter than that of the S group. Notably, the pupal period was shortened significantly in the former group. The fecundity of female adults from the L group was higher, but not significantly so. Female adults in the L group laid significantly larger eggs than those in the S group. Phenotypic correlations between egg size and other traits were generally negligible. However, the correlation between the fecundity of females in the L group and the size of eggs they laid was significantly negative. These results suggest that egg size variation under fixed conditions affect fitness of offspring in P. g. guttata.

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© 2004 by the Japanese Society of Applied Entomology and Zoology
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