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https://hdl.handle.net/2440/61514
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DC Field | Value | Language |
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dc.contributor.author | Costelloe, Justin Francis | en |
dc.contributor.author | Reid, Julian Robert Wishart | en |
dc.contributor.author | Pritchard, Janet Christine | en |
dc.contributor.author | Puckridge, James Terence | en |
dc.contributor.author | Bailey, V. | en |
dc.contributor.author | Hudson, Peter John | en |
dc.date.issued | 2010 | en |
dc.identifier.citation | Marine and Freshwater Research, 2010; 61(8):857-863 | en |
dc.identifier.issn | 1323-1650 | en |
dc.identifier.uri | http://hdl.handle.net/2440/61514 | - |
dc.description.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 from41 in 5 to41 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. | en |
dc.description.statementofresponsibility | J. F. Costelloe, J. R. W. Reid, J. C. Pritchard, J.T. Puckridge, V. E. Bailey and P. J. Hudson | en |
dc.language.iso | en | en |
dc.publisher | CSIRO Publishing | en |
dc.rights | Copyright CSIRO 2010 | en |
dc.subject | arid zone; Cooper Creek; Diamantina River; dryland rivers; flow variability; habitat; Neales River; recruitment | en |
dc.title | Are alien fish disadvantaged by extremely variable flow regimes in arid-zone rivers? | en |
dc.type | Journal article | en |
dc.contributor.school | School of Earth and Environmental Sciences | en |
dc.identifier.doi | 10.1071/MF09090 | en |
Appears in Collections: | Earth and Environmental Sciences publications |
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