Page 263 - Freshwater-Biology-and-Ecology-Handbook
P. 263

River Frome




















                         Baetis scambus nymph                       Asellus aquaticus      Brychius elevatus adult


































                                                                 Freshwater Biology and Ecology Handbook  |  263
                                                                                                                 –
   258   259   260   261   262   263   264   265   266   267   268