Fisheries 649 Limnology 616 Water quality 428 England 420 Management 409 Inland waters 404 Freshwater fish 325 Rivers 322 Aquaculture 306 Ecology 284 Biology 262 Iran 243 Fishery management 242 River fisheries 223 Fishery Advisory Committee 197 Pollution 197 Migratory species 151 Coastal waters 149 Environment 139 Licensing 127 Fishery regulations 117 Water management 107 Water 101 Chemistry 98 Nigeria 98 Phytoplankton 96 North West 93 Mortality 91 Oceanography 90 Temperature 86