Save

Partner choice in piranha shoals

In: Behaviour
Authors:
Anne Magurran
Search for other papers by Anne Magurran in
Current site
Google Scholar
PubMed
Close
and
Helder Queiroz
Search for other papers by Helder Queiroz in
Current site
Google Scholar
PubMed
Close
Download Citation Get Permissions

Access options

Get access to the full article by using one of the access options below.

Institutional Login

Log in with Open Athens, Shibboleth, or your institutional credentials

Login via Institution

Purchase

Buy instant access (PDF download and unlimited online access):

$40.00

Abstract

Although the red-bellied piranha, Pygocentrus nattereri is widely portrayed as a pack-hunting predator virtually nothing is known about its shoaling behaviour. Using fish collected in the flooded forest of the Brazilian Amazon, we conducted a range of choice tests to determine whether individual piranhas make non-random shoaling decisions. These revealed that partner size had a significant impact on shoaling preferences. Piranha shoals were size structured with large, sexually mature, individuals occupying the central zone (defined as within the polygon connecting fish at the edge of the shoal). Small, non-reproductive individuals showed greater motivation to feed. Fish did not discriminate between size-matched individuals from the same and different locality and we found no evidence of intraspecific aggression, despite the piranha's reputation for cannibalism.

Content Metrics

All Time Past Year Past 30 Days
Abstract Views 522 96 10
Full Text Views 183 21 0
PDF Views & Downloads 80 25 0