Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/92781
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Prey selection and diet overlap of native golden perch and alien redfin perch under contrasting hydrological conditions
Author: Wedderburn, S.
Bice, C.
Barnes, T.
Citation: Australian Journal of Zoology, 2014; 62(5):374-381
Publisher: CSIRO Publishing
Issue Date: 2014
ISSN: 0004-959X
1446-5698
Statement of
Responsibility: 
S. D. Wedderburn, C. M. Bice and T. C. Barnes
Abstract: Many freshwater fishes have been introduced outside their natural range. The consequences have included the decline or extinction of native fishes, principally due to competition and predation. Redfin perch (Perca fluviatilis) is a highly efficient predatory fish species that was introduced to Australia in the 1800s. It now has a broad distribution in the Murray–Darling Basin, but its impacts on native fishes are largely unstudied. It often cohabits with native golden perch (Macquaria ambigua ambigua), which is similar from a trophic ecomorphology perspective. We examine prey selection and diet overlap of adult redfin perch and golden perch under contrasting hydrological conditions in terminating lakes of the Murray–Darling Basin. Prey selection by both species varied substantially between drought and flood conditions. Diet overlap of redfin perch and golden perch was significant only during flood, and was apparently related to pelagic prey availability. There were dietary differences during drought that imply that resource partitioning occurred between the perches, possibly because competitive interactions were intensified. Conversely, the promotion of pelagic prey fishes during flooding apparently facilitated resource sharing. The findings suggest that redfin perch can directly compete with native piscivores for prey. The potential impacts on native piscivores and small-bodied fish populations warrant further experimental and field investigations.
Keywords: drought; flood; otoliths; Percichthyidae; Percidae
Description: Published: 11 November 2014
Rights: Journal compilation © CSIRO 2014
DOI: 10.1071/ZO14018
Appears in Collections:Aurora harvest 7
Earth and Environmental Sciences publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.