Aquatic Biology and Ecology Ecosystems 5 Pollution and Degradation 5 Aquaculture (Animals) 4 Environmental impact 4 Fishes 4 Aquacultural and Fisheries Economics, (New March 2000) 3 Biological Resources (Animal) 3 Fish culture 3 Fishery management 3 Sustainability 3 Water Resources 3 Animal Genetics and Breeding, (New March 2000) 2 Animal Immunology, (New March 2000) 2 Aquaculture 2 Aquatic animals 2 Aquatic environment 2 Biology 2 Ecology 2 Eutrophication 2 Fish production 2 Fisheries 2 Habitats 2 Lakes 2 Laws and Regulations 2 Marine ecology 2 Mathematics and Statistics 2 Models 2 Natural Resource Economics, (New March 2000) 2 Nematoda 2