Behavioural traits of rainbow trout and brown trout may help explain their differing invasion success and impacts.

ABSTRACT: Animal behaviour is increasingly recognised as critical to the prediction of non-native species success and impacts. Rainbow trout and brown trout have been introduced globally, but there appear to be differences in their patterns of invasiveness and ecological impact. Here, we investigated whether diploid rainbow trout and diploid and triploid brown trout differ among several key behavioural measures linked to invasiveness and impact. We assessed activity, boldness, aggression, and feeding, using open field, novel object, shelter, mirror, feeding, and functional response experiments. We also tested within each fish type for behavioural syndromes comprising correlations among activity, boldness and aggression. Rainbow trout were more active and aggressive but less bold than diploid and tri

SUBMITTER: McGlade CLO 

PROVIDER: S-EPMC8810905 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature