Population ecology 25 Ecology 13 population ecology 13 Community ecology 11 Fish populations - ecology 10 Population Ecology 10 Marine ecology 6 Fish- Population ecology-- dynamics 4 Biology 3 Biotic communities 3 Community Ecology 3 Evolutionary ecology 3 Geographical ecology 3 Oceanographic environment 3 Zoogeography 3 community ecology 3 evolutionary ecology 3 Animal ecology 2 Animal populations-Ecology 2 BIODIVERSITY 2 Biogeochemical cycles 2 Dams 2 Ecosystems 2 Energy 2 Evolution 2 Landscape ecology 2 Natural resources 2 POPULATION ECOLOGY 2 Phytogeography 2 Pollution 2