Effects of Cow Green Reservoir upon downstream fish populations

Crisp, D.T. (1984) Effects of Cow Green Reservoir upon downstream fish populations. In: Fifty-second annual report for the year ended 31st March 1984. Ambleside, UK, Freshwater Biological Association, pp. 47-62. (Annual Report, Freshwater Biological Association, Ambleside)

Preview

PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader Download (290Kb) | Preview

Abstract

Post impoundment observations on the fish populations of the River Tees, downstream from the Cow Green Reservoir were made between 1971 and 1980. Both bullhead (Cottus gobio L.) and brown trout (Salmo trutta L.) population densities increased in the river after impoundment but changes in growth rate were small. Investigations into the stomach contents of the two species reflects the results of other work on increases of benthos in the river. Following regulation there was an increase in the quantity of Ephemerella ignita found in trout stomachs while in the bullhead, regulation caused an increase in the importance of Mollusca and a decrease in importance of Ephemeroptera and Plecoptera.

Actions (login required)