Reproductive success in male Japanese minnows,Pseudorasbora parva: observations under experimental conditions |
| |
Authors: | Koji Maekawa Kei'ichiroh Iguchi Osamu Katano |
| |
Institution: | (1) National Research Institute of Fisheries Science, 1088 Komaki, Ueda, 386 Nagano, Japan;(2) Present address: Uryu Experimental Forest, University forests, Faculty of Agriculture, Hokkaido University, Tokuda, 096 Nayoro, Japan |
| |
Abstract: | To evaluate the spawning success of male Japanese minnows,Pseudorasbora parva, and female mate choice, spawning behaviour was observed under both artificial and experimental conditions. Larger males
had larger territories and greater reproductive success. The body weight of territorial males decreased during the maintenance
of territories, while that of non-territorial males increased significantly. When the weight of non-territorial males exceeded
that of territorial males, the former began to establish new territories on the substrate, suggesting a conditional strategy
by non-territorial males to trade off immediate reproductive success with growth and hence improve future reproductive success.
Females chose males with larger body size, probably based on dominance rank rather than the quality (or size) of territory.
It was concluded that females choose males of higher dominance rank and that males compete for large territories, both of
which play an important part in male reproductive success. |
| |
Keywords: | Pseudorasbora parva male reproductive success male-male competition female choice conditional tactics |
本文献已被 SpringerLink 等数据库收录! |
|