Anti-Predator behaviour of naïve compared experienced juvenile roach |
| |
Authors: | A Jachner |
| |
Institution: | Department of Hydrobiology, University of Warsaw, 02–097 Warsaw, Banacha 2, Poland |
| |
Abstract: | Juvenile roach Rutilus rutilus without any previous contact with predatory fishes reacted to the presence of alarm substances more intensively than fish with previous experience. Among several types of behavioural response observed, some, such as hiding, were not registered in experienced fish. The most pronounced difference between the two juvenile fish categories was manifested in feeding. Naïve fish used more time for feeding than experienced ones. The experiment showed that alarm substance originating from small and young and medium roach induced a stronger reaction than the substance extracted from large and oldéê fish. |
| |
Keywords: | alarm substance alarm reaction pike-naïve roach experienced roach Rutilus rutilus learning experience alarm substance origin |
|
|