Temporal and spatial variations in the diet of 0 group roach (Rutilus rutilus) larvae and juveniles in the River Great Ouse in relation to prey availability
Authors: Mann, R.H.K., Bass, J.A.B., Leach, D. and Pinder, A.
Journal: River Research and Applications: an international journal devoted to river research and management
0 group roach, (Rutilus rutilus) in the River Great Ouse showed marked ontogenetic changes in their diet. Initial prey were diatoms and Rotifera, followed by Cladocera and other small aquatic invertebrates. From late June onwards, roach in the main river channels switched to feeding on detrital aufwuchs and associated meiofauna on the surface of submerged aquatic plants. This switch did not occur in a marina habitat, where planktonic Cladocera dominated the diet. Between-year differences were observed in the numbers of prey eaten per fish, which largely reflected variations in the abundance of the prey organisms in the water column, or associated with submerged macrophytes. © 1997 John Wiley & Sons, Ltd.
Preferred by: Adrian Pinder