Effects of Varying Flows in Man-Made Streams on Rainbow Trout (Salmo Gairdneri Richardson) Fry
The published proceedings of the two previous international symposia on regulated streams (Ward & Stanford 1979; Lillehammer & Saltveit 1984), as well as the papers presented at this third symposium, indicate the concern for understanding impacts of flow regulation on fish and other aquatic organisms. A major difficulty in the study of regulated streams is conducting studies with proper scientific controls. A survey of the papers published in the two previous symposia revealed only two studies which had the controls in space and time recommended by Green (1979). Although for many regulated rivers it is not possible to conduct impact studies with good controls, the limitations, and consequently the validity of predictions from these studies, must be realized. Impact assessments lacking control areas may record unrelated changes and attribute these to the impact. Assessments lacking a temporal control may not detect that differences existed between the control area and the impacted area before the impact occurred.
KeywordsRainbow Trout Control Period Flow Fluctuation Control Stream Density Stream
Unable to display preview. Download preview PDF.
- Baker, R. J. and Nelder, J. A. 1978. The GLIM system, release 3. Distributed by the Numerical Algorithms Group, 7 Banbury Road, Oxford, England.Google Scholar
- Campbell, R. N. B., Rimmer, D. M. and Scott, D. 1984. The effect of reduced discharge on the distribution of trout. In: Regulated Rivers. (Ed. by A. Lillehammer and S. J. Saltveit), pp. 407–416. Universitetsforlaget AS, Oslo, Norway.Google Scholar
- Chapman, D. W. 1978. Production in fish populations. In: Ecology of Freshwater Fish Production. (Ed. by S. D. Gerking). pp. 5–25. Blackwell Scientific Publications, Oxford, England.Google Scholar
- Green, R. H. 1979. Sampling Design and Statistical Methods for Environmental Biologists. John Wiley & Sons, New York. 269 p.Google Scholar
- Irvine, J. R. 1984. Effects of varying discharge on stream invertebrates and underyearling salmon and trout. Ph.D. Thesis, Zoology Department, University of Otago, Dunedin, New Zealand. 254 pp.Google Scholar
- Lillehammer, A. and Saltveit, S. J. (Eds.). 1984. Regulated Rivers. Universitetsforlaget AS, Oslo, Norway. 540 p.Google Scholar
- Manly, B. F. J. and Crosbie, E. D. 1977. Examples of the use of GLIM. N.Z. Statistician 12(1): 26–42.Google Scholar
- Ward, J. V. and Stanford, J. A. (Eds.) 1979. The Ecology of Regulated Streams. Plenum Press, New York. 298 p.Google Scholar