Craig Coch Field Surveys Group meeting, Malvern February 1976: UWIST Paper 4. Invertebrates: River Wye

Except for a single summer survey by Morgan (1970) no significant investigations of the invertebrate fauna of the R. Wye have been undertaken as far as we are aware. The current programme was designed to describe the distribution and relative abundance of aquatic invertebrates, in the R. Wye and those tributaries relevant to the proposals to regulate discharge in the river system. In addition, a more intensive localised study has been established to describe the population dynamics of selected invertebrate communities more precisely and to establish the feasibility of assessing the effect of secondary production of regulating discharges. Complementary studies on the drift of invertebrates have been undertaken. These data will be needed as a basis for evaluating the effects of the proposed Craig Goch scheme on the invertebrate fauna in the Wye catchment