, Volume 596, Issue 1, pp 203–211 | Cite as

The influence of changes to river hydrology on freshwater fish in regulated rivers of the Murray–Darling basin

  • I. Growns
Primary Research Paper


Freshwater fish are often used as an indicator of the response of the ecosystem to the restoration of river flows or the provision of environmental flows. The ability to model the biological response of fish depends on the capacity to establish clear relationships between changes in river hydrology and the fish assemblages in a river. The fish assemblage structure and the abundances of individual fish species were examined in relation to a hydrological index that described hydrological change in six regulated rivers in the Murray–Darling Basin. The hydrological index explained only a small amount of variation in fish assemblage structure. In addition, the abundances of individual fish species were only weakly correlated with the index of flow deviation. It is suggested that these results make the modelling of responses of fish assemblages to environmental water allocations unfeasible at a large scale and that future studies should concentrate on potentially more simple responses, such as the relationships of fish spawning and recruitment to specific aspects of river hydrology.


Predictive modelling Environmental flows 



Karen Astles and Peter Gehrke managed this project in its early stages and designed the layout of sampling sites. Assistance of fish sampling by NSW Fisheries technical staff, principally Simon Hartley, is gratefully acknowledged. The IQQM modelled data was provided by Chris Ribbons and Paul Pendlebury from the Department of Natural Resources. Bruce Chessman, Alex Meehan and Rod Browne from the Department of Natural Resources, Joel Trexler, Associate Editor Hydrobiologia and three anonymous reviewers are thanked for comments on earlier draughts of the manuscript.


  1. Anderson, M. J., 2000. DISTLM: a FORTRAN computer program to calculate a distance-based multivariate analysis for a linear model, Department of Statistics, University of Auckland.Google Scholar
  2. Anderson, M. J., 2001. A new method for non-parametric multivariate analysis of variance. Austral Ecology 26: 32–46.CrossRefGoogle Scholar
  3. Ardisson, P. L. & E. Bourget, 1997. A study of the relationship between freshwater runoff and benthos abundance: a scale oriented approach. Estuarine, Coastal and Shelf Science 45: 535–545.CrossRefGoogle Scholar
  4. Bain, M. B. & J. M. Boltz, 1989. Regulated streamflow and warmwater stream fish: a general hypothesis and research agenda. U.S. Fish and Wildlife Service Biological Report 89(18), Washington, USA.Google Scholar
  5. Black D., P. Sharma & D. Podger, 1997. Simulation modelling for the Barwon-Darling River system for management planning. In Thoms M. C., A. Gordon & C. Tatnell (eds), Researching the Barwon Darling. Cooperative Research Centre for Freshwater Ecology, Canberra, 34–43.Google Scholar
  6. Bray, J. R. & J. T. Curtis, 1957. An ordination of the upland forest communities of southern Wisconsin. Ecological Monographs 27: 325–349.CrossRefGoogle Scholar
  7. Browder, J. A., 1986. Relationship between pink shrimp production on the Tortugas grounds and water flow patterns in the Florida everglades. Bulletin of Marine Science 122: 127–146.Google Scholar
  8. Bunn, S. & A. Arthington, 2002. Basic principles and ecological consequences of altered flow regimes for aquatic biodiversity. Environmental Management 30: 492–507.PubMedCrossRefGoogle Scholar
  9. Cadwallader, P. & B. Lawrence, 1990. Fish. In Mackay, N. & D. Eastburn (eds), The Murray. Murray Darling Basin Commission, Canberra, 317–337.Google Scholar
  10. Cambray, J. A., J. A. King & C. Bruwer, 1997. Spawning behaviour and early development of the clanwilliam yellowfish (Barbus capensis: Cyprinidae) linked to experimental dam releases in the Olifants River, South Africa. Regulated Rivers, Research and Management 13: 579–602.CrossRefGoogle Scholar
  11. Chesterfield, E. A., 1986. Changes in the vegetation of the river redgum forests in Barmah, Victoria. Australian Forestry 49: 16–27.Google Scholar
  12. Clarke, K. R., 1993. Non-parametric multivariate analyses of changes in community structure. Australian Journal of Ecology 18: 117–143.CrossRefGoogle Scholar
  13. Gehrke, P., P. Brown, C. B. Schiller, D. B. Moffatt & A. Bruce, 1995. River regulation and fish communities in the Murray–Darling river system, Australia. Regulated Rivers: Research and Management 15: 181–198.CrossRefGoogle Scholar
  14. Gehrke, P. C., K. L. Astles & J. H. Harris, 1999. Within-catchment effects of flow alteration on fish assemblages in the Hawkesbury-Nepean River system, Australia. Regulated Rivers: Research and Management 15: 181–198.CrossRefGoogle Scholar
  15. Gehrke, P. C. & J. H. Harris, 2000. Regional-scale differences between fish communities in regulated and unregulated rivers in New South Wales, Australia. Regulated Rivers: Research and Management 17:369–391.CrossRefGoogle Scholar
  16. Gehrke, P. C. & J. H. Harris, 2001. Regional-scale effects of flow regulation on lowland riverine fish communities in New South Wales, Australia. Regulated Rivers: Research & Management 17: 369–391.CrossRefGoogle Scholar
  17. Growns, I. O. & J. E. Growns, 2001. Ecological effects of flow regulation on macroinvertebrate and periphytic diatom assemblages in the Hawkesbury-Nepean River. Regulated Rivers: Research and Management 17: 275–293.CrossRefGoogle Scholar
  18. Growns, J. & N. Marsh, 2000. Characterisation of flow in regulated and unregulated streams in eastern Australia. Cooperative Research Centre for Freshwater Ecology, Tech Report 3/2000.Google Scholar
  19. Kingsford, R. T. & R. F. Thomas, 1995. The Macquarie Marshes in arid Australia and their water birds: a 50-year history of decline. Environmental Management 19: 448–466.CrossRefGoogle Scholar
  20. Ladson, A. R. & L. J. White, 1999. An Index of Stream Condition: Reference Manual, 2nd edn. Waterways Unit, Department of Natural Resources and Environment, Melbourne, Victoria.Google Scholar
  21. Loneragan, N. R. & S. E. Bunn, 1999. River flows and estuarine ecosystems: implications for coastal fisheries from a review and a case study of the Logan River, southeast Queensland. Australian Journal of Ecology 24: 431–440.CrossRefGoogle Scholar
  22. McArdle, B. H. & M. J. Anderson (2001). Fitting multivariate models to community data: a comment on distance-based redundancy analysis. Ecology 82: 290–297.CrossRefGoogle Scholar
  23. Martinez, P. J., T. E. Chart, M. A. Trammell, J. G. Wullschleger & E. P. Bergersen, 1994. Fish species composition before and after construction of a main stream reservoir on the White River, Colorado. Environmental Biology of Fishes 40: 227–239.CrossRefGoogle Scholar
  24. McCullagh, P. & J. A. Nelder, 1989. Generalised Linear Models. Monographs on Statistics and Applied Probability 37. Chapman and Hall, London.Google Scholar
  25. Molles, M. C. J., C. S. Crawford, L. M. Ellis, H. M. Valett & C. N. Dahm, 1998. Managed flooding for riparian ecosystem restoration. BioScience 48: 749–756.CrossRefGoogle Scholar
  26. Penaz, M., P. Jurajda, A. L. Roux & J. M. Olivier, 1995. 0+ fish assemblages in a sector of the Rhone River influenced by the Bregnier-Cordon Hydroelectric scheme. Regulated Rivers: Research and Management 10: 363–372.CrossRefGoogle Scholar
  27. Poff, N. L., J. D. Allan, M. B. Bain, J. B. Karr, K. L. Prestegaard, B. D. Richter & J. C. Stromberg, 1997. The natural flow regime: a paradigm for river conservation and restoration. BioScience 47: 769–784.CrossRefGoogle Scholar
  28. Richter, B. D., J. V. Baumgartner, B. P. Braun & J. Powell, 1998. The spatial assessment of hydrological alteration within a river network. Regulated Rivers: Research and Management 14: 329–340.CrossRefGoogle Scholar
  29. Ruello, N. V., 1973. The influence of rainfall on the distribution and abundance of the school prawn (Metapenaeus macleayi) in the Hunter region (Australia). Australian Journal of Marine and Freshwater Research 23: 221–228.Google Scholar
  30. Sheldon, F. & K. F. Walker, 1997. Changes in biofilms induced by flow regulation could explain extinctions of aquatic snails in the lower River Murray, Australia. Hydrobiologia 347: 97–108.CrossRefGoogle Scholar
  31. Sheldon, F., M. C. Thoms, O. Berry & J. Puckridge, 2000. Using disaster to prevent catastrophe: referencing the impacts of flow changes in large dryland rivers. Regulated Rivers: Research and Management 16: 403–420.CrossRefGoogle Scholar
  32. Skreslet, S., 1976. Influence of freshwater outflow from Norway on recruitment to the stock of Arcto-Norwegian cod (Gadus morhua) In Skreslet, S., R. Leinobo, J. B. L. Matthews & L. Sakshaug (eds), Freshwater on the Sea. The Association of Norwegian Oceanographers, Oslo, 233–237.Google Scholar
  33. Skreslet, S., 1997. A conceptual model of the trophodynamical response to river discharge in a large marine ecosystem Journal of Marine Systems 12: 187–198.CrossRefGoogle Scholar
  34. Sutcliffe, W. H., 1972. Some relations of land drainage, nutrients, particulate material and fish catches in two eastern Canadian bays. Journal of the Fisheries Research Board Canada 29: 357–362.Google Scholar
  35. Sutcliffe, W. H., 1973. Correlations between seasonal river discharge and local landings of American lobster (Homarus americanus) and Atlantic halibut (Hippoglossus hippoglossus) in the Gulf of St. Lawrence. Journal of the Fisheries Research Board Canada 30: 856–859.Google Scholar
  36. Travnichek, V. H., M. B. Bain & M. J. Maceina, 1995. Recovery of a warmwater fish assemblage after the initiation of a minimum-flow release downstream from a hydroelectric dam. Transactions of the American Fisheries Society 124: 836–844.CrossRefGoogle Scholar
  37. Turak, E., L. K. Flack, R. H., Norris, J. Simpson & N. Waddell, 1999. Assessment of river condition at a large spatial scale using predictive models. Freshwater Biology 41: 283–298.CrossRefGoogle Scholar
  38. Walker, K. F., 1985. A review of the ecological impacts of river regulation in Australia. Hydrobiologia, 125: 111–129.CrossRefGoogle Scholar
  39. Ward, J. & J. Stanford, 1979. The Ecology of Regulated Streams. Plenum Press, New York.Google Scholar
  40. Warwick, R. M., Clarke K. R. & J. M. Gee, 1990. The effect of disturbance by soldier crabs, Mictyris platycheles H. Milne Edwards, on meiobenthic community structure. Journal of Experimental Marine Biology and Ecology 135: 19–33.CrossRefGoogle Scholar
  41. Welcomme, R. L., 1994. The status of large rivers. In Cowx, I. G. (ed.), Rehabilitation of Freshwater Fisheries. Fishing News Books, Oxford, United Kingdom, 11–20.Google Scholar
  42. Weisberg, S. B. & W. H. Burton, 1993. Enhancement of fish feeding and growth after an increase in minimum flow below the Conowingo Dam. North American Journal of Fisheries Management 13: 103–109.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  1. 1.Department of Water and EnergyScience and Information BranchArmidaleAustralia

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