THE FORMATION, TRANSFER, AND FATE OF SPERMATOPHORES IN PHOTINUS FIREFLIES (COLEOPTERA, LAMPYRIDAE)

Citation
Ed. Vanderreijden et al., THE FORMATION, TRANSFER, AND FATE OF SPERMATOPHORES IN PHOTINUS FIREFLIES (COLEOPTERA, LAMPYRIDAE), Canadian journal of zoology, 75(8), 1997, pp. 1202-1207
Citations number
32
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Zoology
Journal title
ISSN journal
0008-4301
Volume
75
Issue
8
Year of publication
1997
Pages
1202 - 1207
Database
ISI
SICI code
0008-4301(1997)75:8<1202:TFTAFO>2.0.ZU;2-G
Abstract
Fireflies in the genus Photinus have been assumed previously to be amo ng the many insect species in which males transfer primarily sperm dur ing mating. In this study, male P. ignitus and P. marginellus were fou nd to produce a complex proteinaceous spermatophore in four paired mal e accessory glands, a major component of the spermatophore being forme d within prominent spiral glands. The spermatophore is transferred to the female within the first 40 min of copulation and sperm bundles are released into the spermatheca. The remainder of the spermatophore sub sequently undergoes digestion within a specialized sac in the female r eproductive tract. To examine the function of male spermatophores, mal e P. marginellus were fed rhodamine B, resulting in the production of intensely fluorescent spermatophores. After mating with rhodamine-dyed males, females incorporated material derived from male spermatophores into their oocytes within 58 h post mating. Nutrient donations from m ales during mating are expected to play particularly important roles i n female oogenesis in insects with nonfeeding adults, such as Photinus spp. The presence of spermatophores in Photinus is related to marked differences among species in their life histories, mating systems, and mating behaviors.