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- Title
Intrasexual copulation and mate discrimination in a population of Nodilittorina radiata (Gastropoda: Littorinidae).
- Authors
Ito, Atsushi; Wada, Satoshi
- Abstract
Intrasexual copulation and mate discrimination by Nodilittorina radiata (Gastropoda: Littorinidae) were studied on a concrete breakwater at Hakodate Bay, southern Hokkaido, Japan. Intrasexual (male–male) copulations were observed in 4.7–21.1% of copulating pairs on the shore. As females were relatively larger than males and males copulated with females larger than themselves, we hypothesized that males choose potential mates larger than themselves. However, two male mates showed no significant size preference in intrasexual copulations, suggesting that males do not choose relatively larger individuals as mates. In a laboratory mate-choice experiment, male N. radiata preferred to mate with females, indicating precopulatory sex identification. They copulated with males, however, at the frequency of 37%, perhaps because of sex misidentification.
- Subjects
JAPAN; ANIMAL sexual behavior; NODILITTORINA; BREAKWATERS; SEXUAL intercourse
- Publication
Journal of Ethology, 2006, Vol 24, Issue 1, p45
- ISSN
0289-0771
- Publication type
Article
- DOI
10.1007/s10164-005-0159-1