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Characterizing the biological traits and life history of Acanthopagrus (Sparidae) hybrid complexes: implications for conservation and management

Citation

Ochwada -Doyle, F and Roberts, D and Gray, C and Barnes, L and Haddy, J and Fearman, J, Characterizing the biological traits and life history of Acanthopagrus (Sparidae) hybrid complexes: implications for conservation and management, Journal of Fish Biology, 81, (5) pp. 1540-1558. ISSN 0022-1112 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 The authors. Journal of Fish Biology Copyright 2012 The Fisheries Society of the British Isles.

DOI: doi:10.1111/j.1095-8649.2012.03401.x

Abstract

This study examined the spatio-temporal reproductive patterns, population structure, maturity and growth of Acanthopagrus hybrid complexes, which comprise mainly black bream Acanthopagrus butcheri and the hybrids they form with yellowfin bream Acanthopagrus australis, in two Australian estuaries (Coila and Brou Lakes, NSW). There were no differences between pure A. butcheri and hybrids in terms of their population structure, growth and maturity, suggesting that these two breeds have similar life histories and may therefore be managed as single, naturally cohesive units. Sexual variation in size structure was only observed for the complex in Coila Lake. Although there was significant variation in age structure between estuaries, both complexes exhibited dominance of only a few year classes indicating episodic recruitment and high fishing mortality. Acanthopagrus eggs occurred in higher numbers within upstream creek habitats compared to lake habitats, thereby highlighting the need to protect these spawning habitats. Although maturity in the complexes was not influenced by gender or estuary, differences in growth were detected between the genders and estuaries.

Item Details

Item Type:Refereed Article
Keywords:black bream, fisheries management, hybridization, hybrid swarm, ICOLLs, yellowfin
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Aquaculture Crustaceans (excl. Rock Lobster and Prawns)
Author:Haddy, J (Dr James Haddy)
Author:Fearman, J (Mrs Jo-Anne Fearman)
ID Code:80631
Year Published:2012
Web of Science® Times Cited:3
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2012-11-06
Last Modified:2014-12-18
Downloads:1 View Download Statistics

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