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- Title
Recognition of non-native peacock bass, Cichla kelberi by native prey: testing the naiveté hypothesis.
- Authors
Kovalenko, Katya; Dibble, Eric; Agostinho, Angelo; Pelicice, Fernando
- Abstract
Prey naiveté is proposed as one of the main reasons behind species extinctions attributed to invasive predators. This study examined whether the naiveté hypothesis could explain extinctions after the introduction of peacock bass ( Cichla kelberi) in Paraná River, Brazil. Our results show that prey responded to both visual and chemical cues of peacock bass. Displayed avoidance behaviors were equal to or greater than those observed with a native predator, Hoplias malabaricus. We conclude that lack of recognition was not responsible for the observed vulnerability of native species to this introduced predator. Finally, we discuss implications of these findings for the native biodiversity and convene other potential explanations for the observed effects of peacock bass on native prey.
- Subjects
PARANA River (Brazil-Argentina); BRAZIL; ARGENTINA; PEACOCK bass; ANTIPREDATOR behavior; INTRODUCED animals; BIOLOGICAL invasions; BIOLOGICAL extinction; PREDATION
- Publication
Biological Invasions, 2010, Vol 12, Issue 9, p3071
- ISSN
1387-3547
- Publication type
Article
- DOI
10.1007/s10530-010-9698-7