Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Blue-green algae and fish population changes in a eutrophic estuary

Potter, I.C., Loneragan, N.R., Lenanton, R.C.J. and Chrystal, P.J. (1983) Blue-green algae and fish population changes in a eutrophic estuary. Marine Pollution Bulletin, 14 (6). pp. 228-233.

Link to Published Version: http://dx.doi.org/10.1016/0025-326X(83)90257-6
*Subscription may be required

Abstract

Evidence is presented which indicates that dense blooms of the blue-green alga Nodularia spumigena have affected fish and crab populations in a large estuarine system in south-western Australia. For example, the numbers of fish were generally very low at sites in which the chlorophyll a level, an excellent indicator of Nodularia density during the late spring and summer, was above 100 μgl−1. Moreover, commercial fishermen have recorded greatly reduced catches in Nodularia-affected areas and dead fish and crabs were found in regions where Nodularia was very dense. While the effects of this blue-green alga apparently led to death in the case of some bottom-living species in the most affected parts of the system, more active species moved into regions where Nodularia was virtually absent.

Item Type: Journal Article
Murdoch Affiliation: School of Environmental and Life Sciences
Publisher: Elsevier BV
Copyright: © 1983 Published by Elsevier Ltd.
URI: http://researchrepository.murdoch.edu.au/id/eprint/12820
Item Control Page Item Control Page