Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences

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

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:

Marine and Freshwater Research 61(8) 857-863
Submitted: 16 April 2009  Accepted: 25 February 2010   Published: 13 August 2010


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.


Arthington A. H.Balcombe S. R.Wilson G. A.Thoms M. C.Marshall J.2005Spatial 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 Research562535doi:10.1071/MF04111

Bunn S. E.Arthington A. H.2002Basic principles and ecological consequences of altered flow regimes for aquatic biodiversity.Environmental Management30492507doi:10.1007/S00267-002-2737-0

Costelloe J. F.Grayson R. B.Argent R. M.McMahon T. A.2003Modelling flow routing and transmission loss processes in arid zone floodplain rivers.Environmental Modelling & Software18693703doi:10.1016/S1364-8152(03)00071-9

Costelloe J. F.Grayson R. B.McMahon T. A.2005aModelling streamflow in a large ungauged arid zone river, central Australia, for use in ecological studies.Hydrological Processes1911651183doi:10.1002/HYP.5558

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 [accessed 27 February 2009].

Filipe A. F.Cowx I. G.Collares-Pereira M. J.2002Spatial modelling of freshwater fish in semi-arid river systems: a tool for conservation.River Research and Applications18123136doi:10.1002/RRA.638

Fisher-Huckins C. J. F.Osenberg C. W.Mittlebach G. G.2000Species introductions and their ecological consequences: an example with congeneric sunfish.Ecological Applications10612625doi:10.1890/1051-0761(2000)010[0612:SIATEC]2.0.CO;2

Gehrke P. C.Astles K. L.Harris J. H.1999Within-catchment effects of flow alteration on fish assemblages in the Hawkesbury–Nepean river system, Australia.Regulated Rivers: Research and Management15181198doi:10.1002/(SICI)1099-1646(199901/06)15:1/3<181::AID-RRR528>3.0.CO;2-5

Godinho F. N.Ferreira M. T.1998The relative influences of exotic species and environmental factors on an Iberian native fish community.Environmental Biology of Fishes514151doi:10.1023/A:1007412714605

Harris J. H.1995The use of fish in ecological assessments.Australian Journal of Ecology206580doi:10.1111/J.1442-9993.1995.TB00523.X

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.Burchett M.1997Impact of the introduced poeciliid Gambusia holbrooki (Girard, 1859) on the growth and reproduction of Pseudomugil signifer (Kner, 1865) in Australia.Marine and Freshwater Research48425434doi:10.1071/MF96114

Ivantsoff W.Aarn 1999Detection of predation on Australian native fishes by Gambusia holbrooki.Marine and Freshwater Research50467468doi:10.1071/MF98106

Kennard M. J.Arthington A. H.Pusey B. J.Harch B. D.2005Are alien fish a reliable indicator of river health?Freshwater Biology50174193doi:10.1111/J.1365-2427.2004.01293.X

Knighton A. D.Nanson G. C.2001An event-based approach to the hydrology of arid zone rivers in the Channel Country of Australia.Journal of Hydrology254102123doi:10.1016/S0022-1694(01)00498-X

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.Brown L. R.2002Fish communities of the Sacramento River Basin: implications for conservation of native fishes in the Central Valley, California.Environmental Biology of Fishes63373388doi:10.1023/A:1014964318485

Morgan D. L.Gill H. S.Maddern M. G.Beatty S. J.2004Distribution and impacts of introduced freshwater fishes in Western Australia.New Zealand Journal of Marine and Freshwater Research38511523

Propst D. L.Gido K. B.Stefferud J. A.2008Natural flow regimes, non-native fishes, and native fish persistence in arid-land river systems.Ecological Applications1812361252

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.Boulton A. J.1998Flow variability and the ecology of large rivers.Marine and Freshwater Research495572doi:10.1071/MF94161

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.Costelloe J. F.2000Hydrological persistence and the ecology of dryland rivers.Regulated Rivers: Research and Management16385402doi:10.1002/1099-1646(200009/10)16:5<385::AID-RRR592>3.0.CO;2-W

Puckridge J. T.Costelloe J. F.Reid J. R. W.2010Ecological responses to variable water regimes in arid zone wetlands, Coongie Lakes, Australia.Marine and Freshwater Research61832841doi:10.1071/MF09069

Pyke G. H.2005A review of the biology of Gambusia affinis and G. holbrooki.Reviews in Fish Biology and Fisheries15339365doi:10.1007/S11160-006-6394-X

Schall R.1991Estimation in generalized linear models with random effects.Biometrika78719727doi:10.1093/BIOMET/78.4.719

Stoffels R. J.Humphries P.2003Ontogenetic variation in the diurnal food and habitat associations of an endemic and an exotic fish in floodplain ponds: consequences for niche partitioning.Environmental Biology of Fishes66293305doi:10.1023/A:1023918420927

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.)

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