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Customary and recreational fishing pressure: large-bodied fish assemblages in a tropical, intermittent Australian river

Citation

Close, PG and Dobbs, RJ and Tunbridge, DJ and Speldewinde, PC and Warfe, DM and Toussaint, S and Davies, PM, Customary and recreational fishing pressure: large-bodied fish assemblages in a tropical, intermittent Australian river, Marine and Freshwater Research, 65, (5) pp. 466-474. ISSN 1323-1650 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 CSIRO

DOI: doi:10.1071/MF13042

Abstract

Permanent waterholes in intermittent rivers of northern Australia support a diverse piscifauna and are popular areas for customary and recreational fishing. The present preliminary study explored the perception that fishing reduces the abundance of targeted, large-bodied species that become restricted to disconnected waterholes during the distinct dry season. River sites in the Fitzroy River catchment, Western Australia, could be clearly classified as experiencing either high or low fishing pressure by using metrics of human ‘accessibility’. The abundance of Hephaestus jenkinsi and Lates calcarifer, targeted by both recreational and customary fishers was highly correlated with accessibility and showed a negative relationship with fishing pressure. Non-target species showed no discernible trend. We estimated that 38% of river length remains subject to relatively low fishing pressure. These preliminary relationships suggest that fish harvest can potentially alter the structure of fish assemblages in disconnected habitats. The potential impact of fishing on the sustainability of fish populations is, most likely, greatest for non-diadromous species and will become more apparent with increasing distance from recolonisation sources. Combining management techniques that maintain recolonisation and recruitment potential with traditional fisheries management strategies (e.g. bag and size limits) presents a suitable approach to mitigate the effects of fish harvesting from tropical intermittent rivers.

Item Details

Item Type:Refereed Article
Keywords:fishing, fisheries management, Kimberley, refugia, waterholes
Research Division:Environmental Sciences
Research Group:Environmental Science and Management
Research Field:Environmental Impact Assessment
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Fresh, Ground and Surface Water Flora, Fauna and Biodiversity
Author:Warfe, DM (Dr Danielle Warfe)
ID Code:93654
Year Published:2014
Web of Science® Times Cited:3
Deposited By:Biological Sciences
Deposited On:2014-08-12
Last Modified:2015-05-20
Downloads:0

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