Asunto(s)
Biodiversidad , Lagos , Contaminación por Petróleo , Accidentes , Animales , Cíclidos , Abastecimiento de Alimentos , Humanos , TanzaníaRESUMEN
Differences in predator-inspection behaviour between gravid and non-gravid female as well as between male and female three-spined sticklebacks Gasterosteus aculeatus were investigated. Gravid females confronted with a live rainbow trout Oncorhynchus mykiss showed bolder inspection behaviour than non-gravid ones. The behaviour of gravid females was comparable with that of males, maybe because both face a high risk of predation. The results indicate that antipredator behaviour in female G. aculeatus is not fixed but adjusted to their reproductive state.
Asunto(s)
Reacción de Fuga/fisiología , Reproducción/fisiología , Smegmamorpha/fisiología , Animales , Femenino , Masculino , Oncorhynchus mykiss/fisiologíaRESUMEN
The influence of relatedness on male-male aggression was tested in three-spined sticklebacks Gasterosteus aculeatus. The intensity of aggression against brothers and non-kin males did not differ significantly, indicating that kin recognition plays at most a minor role in aggressive interactions between male G. aculeatus.