Abstract:
:Shorter male larval and pupal durations were sufficient to produce the protandrous emergence pattern of the black swallowtail butterfly. In 9 broods observed under natural conditions, the first male was seen 7.1±6.5 days before the first female, although the peak of captures relative to the first capture was similar in both sexes. The field data supported only weakly the predictions of the Wiklund-Fagerstrom model for protandry. Some prereproductive period was necessary for males, and they were limited in how frequently they could mate. A third of the females mated more than once.Males were significantly smaller in size and weight than females in both diapausing and non-diapausing broods. Feeding experiments indicated that male larvae ate less and converted their food into biomass more efficiently than females. Female pupae contained higher proportions of fat and protein than male pupae. Differential body composition may be involved in sexual dimorphism differences in both larval and pual developmental rates. Thus, in addition to size, chemical differences in composition or metabolism may contribute to the observed natural protandry.
journal_name
Oecologiajournal_title
Oecologiaauthors
Lederhouse RC,Finke MD,Scriber JMdoi
10.1007/BF00389003subject
Has Abstractpub_date
1982-06-01 00:00:00pages
296-300issue
3eissn
0029-8549issn
1432-1939pii
10.1007/BF00389003journal_volume
53pub_type
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