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RESEARCH ARTICLE
Contents Vol 61(8)

Are alien fish disadvantaged by extremely variable flow regimes in arid-zone rivers?

J. F. Costelloe A H , J. R. W. Reid B C D , J. C. Pritchard C E , J. T. Puckridge C , V. E. Bailey F and P. J. Hudson C G
+ Author Affiliations
- Author Affiliations

A Department of Civil and Environmental Engineering, University of Melbourne, Vic. 3010, Australia.

B CSIRO Sustainable Ecosystems, GPO Box 284, Canberra, ACT 2601, Australia.

C School of Earth and Environmental Sciences, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia.

D Present address: The Fenner School of Environment and Society, Australian National University, Acton, ACT 0200, Australia.

E Present address: Murray Darling Basin Authority, 51 Allara St, Canberra, ACT 2601, Australia.

F Environmental Protection Agency, PO Box 202, Longreach, Qld 4730, Australia.

G Present address: South Australian Museum, Adelaide, SA 5000, Australia.

H Corresponding author. Email: jcost@unimelb.edu.au

Marine and Freshwater Research 61(8) 857-863 https://doi.org/10.1071/MF09090
Submitted: 16 April 2009  Accepted: 25 February 2010   Published: 13 August 2010

Abstract

The proliferation of alien fish in dryland rivers potentially obstructs the maintenance of river health. Modified flow regimes are hypothesised to facilitate invasions by alien fish but in unregulated dryland rivers, large floods provide a recruitment advantage for native over alien species whereas droughts favour alien species. We tested these hypotheses by using data from a 3-year study (2000–2003) of fish populations in the unmodified rivers of the Lake Eyre Basin (LEB) of Australia. Results from a lower reach of Cooper Creek were compared with those of an earlier study (1986–1992). During both periods, large floods occurred, with return periods ranging from >1 in 5 to >1 in 25 years. In the lower Cooper, decreases in the abundance of alien species relative to native species, and dramatic increases in recruitment of native species, were observed during a 1–3-year period following large floods. In two other rivers in 2000–2003, there was no statistically significant change in the already low abundances of alien species. We suggest that the naturally variable hydrological regimes and native-dominant fish assemblages of the unregulated LEB rivers afford some resistance to the establishment and proliferation of alien fish through flood and drought conditions.

Additional keywords: arid zone, Cooper Creek, Diamantina River, dryland rivers, flow variability, habitat, Neales River, recruitment.


Acknowledgements

Funding for the ARIDFLO project was provided by the Natural Heritage Trust for the Environmental Flows Program, an initiative of Environment Australia. The project was administered through the South Australian Department of Water, Land and Biodiversity Conservation and the University of Adelaide. We particularly acknowledge the project manager, Michael Good. Local landholders are thanked for access to their properties during fieldwork. The fieldwork also relied on a large number of selfless volunteers. The constructive comments of three journal reviewers, the associate editor and the editor have greatly improved this paper, and are sincerely appreciated. We dedicate this work to the late Dr Jim Puckridge, who instigated and led the ARIDFLO project.


References

Arthington, A. H. , Balcombe, S. R. , Wilson, G. A. , Thoms, M. C. , and Marshall, J. (2005). Spatial and temporal variation in fish-assemblage structure in isolated waterholes during the 2001 dry season of an arid-zone, floodplain river, Cooper Creek, Australia. Marine and Freshwater Research 56, 25–35.
| Crossref | GoogleScholarGoogle Scholar | Costelloe J. F., Hudson P., Pritchard J. C., Puckridge J. T., and Reid J. R. W. (2005b). ARIDFLO – Environmental flow requirements of arid-zone rivers. Final report to Environment Australia, Canberra. Available at http://www.lebmf.gov.au/publications/aridflo.html [accessed 27 February 2009].

Filipe, A. F. , Cowx, I. G. , and Collares-Pereira, M. J. (2002). Spatial modelling of freshwater fish in semi-arid river systems: a tool for conservation. River Research and Applications 18, 123–136.
| Crossref | GoogleScholarGoogle Scholar | Harris J. H., and Gehrke P. C. (1997). Fish and rivers in stress: the NSW rivers survey. NSW Fisheries Office of Conservation, the Cooperative Research Centre for Freshwater Ecology, in association with NSW Resource and Conservation Assessment Council, Sydney.

Howe, E. , Howe, C. , Lim, R. , and Burchett, M. (1997). Impact of the introduced poeciliid Gambusia holbrooki (Girard, 1859) on the growth and reproduction of Pseudomugil signifer (Kner, 1865) in Australia. Marine and Freshwater Research 48, 425–434.
| Crossref | GoogleScholarGoogle Scholar | Kotwicki V. (1986). ‘Floods of Lake Eyre.’ (Engineering and Water Supply Department: Adelaide.)

Long P. E., and Humphrey V. E. (1997). Fisheries Study Lake Eyre Catchment, Thomson and Diamantina Drainages December 1995. DPI Information Series QI97080, Brisbane.

May, J. T. , and Brown, L. R. (2002). Fish communities of the Sacramento River Basin: implications for conservation of native fishes in the Central Valley, California. Environmental Biology of Fishes 63, 373–388.
| Crossref | GoogleScholarGoogle Scholar | Puckridge J. T. (1999). The role of hydrology in the ecology of Cooper Creek, Central Australia: implications for the Flood Pulse Concept. PhD Thesis, University of Adelaide.

Puckridge, J. T. , Sheldon, F. , Walker, K. F. , and Boulton, A. J. (1998). Flow variability and the ecology of large rivers. Marine and Freshwater Research 49, 55–72.
| Crossref | GoogleScholarGoogle Scholar | Puckridge J. T., Costelloe J. F., and Walker K. F. (1999). DRY/WET: effects of changed water regime on the fauna of arid zone wetlands (CD-ROM model and documentation). Report to National Wetlands Research and Development Program. Environment Australia and Land and Water Resources Research and Development Corporation, Canberra.

Puckridge, J. T. , Walker, K. F. , and Costelloe, J. F. (2000). Hydrological persistence and the ecology of dryland rivers. Regulated Rivers: Research and Management 16, 385–402.
| Crossref | GoogleScholarGoogle Scholar | Wager R., and Jackson P. (1993). ‘The Action Plan for Freshwater Fishes.’ (Australian Nature Conservation Agency Endangered Species Program: Canberra.)

Wager R., and Unmack P. J. (2000). ‘Fishes of the Lake Eyre Catchment of Central Australia.’ (Queensland Department of Primary Industries: Brisbane.)