We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Predation environment affects boldness temperament of neotropical livebearers.
- Authors
Rasmussen, Josh E.; Belk, Mark C.
- Abstract
Behavioral traits of individuals are important phenotypes that potentially interact with many other traits, an understanding of which may illuminate the evolutionary forces affecting populations and species. Among the five axes of temperament is the propensity to behave boldly in the presence of a perceived risk. To determine the effect of different predatorial regimes on boldness and fearfulness, we assessed the behavior of individuals in a novel portable swim chamber (i.e., forced open-field test) by Brachyrhaphis rhabdophora ( n = 633). We used an information theoretic framework to compare generalized (logistic) linear fixed-effects models of predatorial regime (predator-free [ n = 6] and predator [ n = 4] sites), sex, and standard length ( SL). Fish from predator sites were much more fearful in the novel arena than fish from nonpredator sites. This varied by length, but not by sex. At 48 mm SL, fish from nonpredator sites were 4.9 times more likely to express bold behavior (ambulation) in the novel swim chamber as fish from predator sites. Probabilities of 'ambulating' within the swim chamber increased with size for nonpredator sites and decreased with size for predator sites.
- Subjects
LATIN America; PREDATION; POECILIIDAE; SPECIES diversity; PHENOLOGY
- Publication
Ecology & Evolution (20457758), 2017, Vol 7, Issue 9, p3059
- ISSN
2045-7758
- Publication type
Article
- DOI
10.1002/ece3.2886