Sperm drinking by female catfishes: a novel mode of insemination |
| |
Authors: | Masanori Kohda Masayo Tanimura Miyako Kikue-Nakamura Satoshi Yamagishi |
| |
Institution: | (1) Laboratory of Animal Sociology, Department of Biology, Faculty of Science, Osaka City University, Osaka, 558, Japan |
| |
Abstract: | Synopsis We report on unique reproductive behaviour and a new mode of egg insemination in a small catfish Corydoras aeneus (Callichthyidae). A male courts a female by presenting his abdomen to her. Before releasing eggs, the female attaches her mouth to the male's genital opening and directly drinks his sperm. The sperm pass through her intestine and are discharged together with eggs into the pouch formed by her pelvic fins. Thus, eggs are mixed with fresh non-dispersed sperm in an enclosed space, ensuring effective insemination. This mode of insemination is novel to fishes, but is likely not restricted to catfishes of the genus Corydoras. |
| |
Keywords: | Reproductive behaviour Corydoras aeneus T-position Egg fertilization Ventral pouch Callichthyidae New mode of sperm delivery |
本文献已被 SpringerLink 等数据库收录! |
|