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Type: Journal article
Title: Use of otolith chemical signatures to estimate carp recruitment sources in the mid-Murray River, Australia
Author: Crook, D.
Gillanders, B.
Citation: River Research and Applications, 2006; 22(8):871-879
Publisher: John Wiley & Sons Ltd
Issue Date: 2006
ISSN: 1535-1459
Statement of
David A. Crook and Bronwyn M. Gillanders
Abstract: Recent research has suggested that the Barmah-Millewa forest (BMF) floodplain provides a particularly important spawning ground for carp in the Murray River and that there is a large export of juvenile carp from the BMF into other parts of the Murray River system. This study examined whether chemical analysis of otoliths (fish ear stones) represents a feasible technique for estimating the relative importance of particular sources of carp recruitment in the Murray River. Otolith chemical signatures were analysed for fish collected from three lakes on the BMF floodplain and from three major tributaries of the mid-Murray River. A single site downstream of these potential sources of carp recruitment (Torrumbarry Weir) was then examined to estimate the relative contribution of the BMF and the tributaries to carp recruitment at this site. The results of the study suggest that at least some of the lakes on the BMF floodplain are important sources of carp in the mid-Murray River. Using a maximum likelihood analysis of otolith chemical signatures, it was estimated that Barmah Lake and Moira Lake were the most likely recruitment sources for 98% of the fish collected from Torrumbarry Weir. The study demonstrates the potential application of otolith chemical analyses for determining the relative importance of potential recruitment sources of fish in rivers.
Keywords: Otolith chemistry; fish recruitment; common carp; Cyprinus carpio
Description: The definitive version may be found at Copyright © 2006 John Wiley & Sons, Ltd.
RMID: 0020061744
DOI: 10.1002/rra.941
Appears in Collections:Earth and Environmental Sciences publications
Environment Institute Leaders publications

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