Time constraints related to sexual maturation and prolonged copulation in the female-dimorphic damselfly Ischnura senegalensis
Article first published online: 18 JUN 2012
© 2012 The Entomological Society of Japan
Volume 16, Issue 1, pages 34–39, January 2013
How to Cite
Takahashi, Y. and Watanabe, M. (2013), Time constraints related to sexual maturation and prolonged copulation in the female-dimorphic damselfly Ischnura senegalensis. Entomological Science, 16: 34–39. doi: 10.1111/j.1479-8298.2012.00532.x
- Issue published online: 4 JAN 2013
- Article first published online: 18 JUN 2012
- Received 28 January 2012; accepted 2 May 2012.
- life history;
Time constraints are critical for reproductive success. To understand the spatiotemporal dynamics of morph frequency in the female-dimorphic damselfly Ischnura senegalensis, we compared two different morphs for two important time constraints on female reproductive output, i.e. post-emergence sexual maturation and prolonged copulation. The females of both morphs achieved sexual maturation 4–5 days after emergence, suggesting that the rate of sexual mutation does not result in morph-specific fitness. The copulation durations declined with the time of onset of copulation in both morphs. Consequently, all copulations terminated at approximately 12:00 hours. Because females show foraging and oviposition activity only after copulation, the copulation duration does not result in morph-specific time constraints. These two important time constraints do not account for morph-specific reproductive success and do not affect the evolutionary equilibrium of morph frequency in I. senegalensis.