Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Aspects of Mating Frequency and Reproductive Maturity in Papilio zelicaon

Steven R. Sims
The American Midland Naturalist
Vol. 102, No. 1 (Jul., 1979), pp. 36-50
DOI: 10.2307/2425064
Stable URL: http://www.jstor.org/stable/2425064
Page Count: 15
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Aspects of Mating Frequency and Reproductive Maturity in Papilio zelicaon
Preview not available

Abstract

Female Papilio zelicaon in different populations show a mean frequency of 1.2-1.9 matings, with a maximum of three. Mating frequency increases with female age. No seasonal or latitudinal mating frequency differences were discovered but mating frequency was significantly greater in females from montane populations compared to lowland females. This difference was interpreted as resulting from increased mating frequency of selected males in "hilltop" areas leading to sperm/accessory gland depletion and rapid return of sexual receptivity in females mated to such males. Use of sperm from the last male in a mating sequence (sperm displacement) occurred in a double-mated female using a red-eyed mutant as a genetic marker. Females mated to mature males laid more ova than those paired with immature males, while no differences were noted between the latter group and virgin females. Oviposition appears to be influenced more by sperm quantity and/or accessory gland secretion than by physical presence of the spermatophore. Rapid multiple mating by males leads to smaller spermatophores deficient in sperm. Sperm is produced continuously at a uniform rate during the male's life whereas production rate of accessory gland secretions decreases with male age. At least 40-50% of males less than 12 hr old are incapable of insemination of females. Male mating ability (related to variance and duration of copulation) is low from 0-12 hr, peaks at age 2-8 days, then gradually declines. Extended copulation occurred in immature and old males and in second matings of rapid mating sequences. This was regarded as permitting sperm/accessory fluids to be produced and transferred in copulo while allowing depleted or immature males to exploit mating opportunities.

Page Thumbnails

  • Thumbnail: Page 
36
    36
  • Thumbnail: Page 
37
    37
  • Thumbnail: Page 
38
    38
  • Thumbnail: Page 
39
    39
  • Thumbnail: Page 
40
    40
  • Thumbnail: Page 
41
    41
  • Thumbnail: Page 
42
    42
  • Thumbnail: Page 
43
    43
  • Thumbnail: Page 
44
    44
  • Thumbnail: Page 
45
    45
  • Thumbnail: Page 
46
    46
  • Thumbnail: Page 
47
    47
  • Thumbnail: Page 
48
    48
  • Thumbnail: Page 
49
    49
  • Thumbnail: Page 
50
    50