期刊
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
卷 63, 期 10, 页码 1505-1513出版社
SPRINGER
DOI: 10.1007/s00265-009-0806-6
关键词
Reproductive investment; Ejaculate quantification; Sex peptide; Ovulin; Drosophila melanogaster
资金
- Ruth L. Kirschstein National Research Service Award Post-Doctoral Fellowship [1F32GM074361]
- National Science Foundation [DEB-0746915]
- National Institutes of Health [HD38921]
- Direct For Biological Sciences
- Division Of Environmental Biology [0746915] Funding Source: National Science Foundation
In many species, seminal fluid proteins (SFPs) affect female post-mating behavioral patterns, including sperm storage, egg laying, feeding, and remating. Yet, few studies have investigated the patterns of allocation, depletion, and replenishment of SFPs in male animals, despite the importance of these proteins to male and female reproductive success. To investigate such SFP dynamics, it is necessary to have a sensitive method for quantifying SFP levels in males and mated females. We developed such a method by adapting the enzyme-linked immunosorbent assay (ELISA) using anti-SFP antibodies. Here, we first use two Drosophila melanogaster SFPs (ovulin and sex peptide) to demonstrate that ELISAs provide accurate measures of SFP levels. We find that, consistent with previous data from Western blotting or immunofluorescence studies, levels of both ovulin and sex peptide decline in the mated female with time since mating, but they do so at different rates. We then use ELISAs to show that males become depleted of SFPs with repeated matings, but that previously mated males are able to transfer virgin levels of SFPs after 3 days of sexual inactivity. Finally, we demonstrate that ELISAs can detect SFPs from wild-caught D. melanogaster males and, thus, potentially can be used to track mating patterns in the wild. This method of measuring SFP dynamics can be used in a wide range of species to address questions related to male reproductive investment, female mating history, and variation in female post-mating behavioral changes.
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