Marine ecology-- Ocean ecology-- Sea ecology 117 Oceanography 102 History 60 Economics 49 Indian Ocean 32 Marine pollution-- Pollution in Ocean 31 Services marketing 28 Social Sciences 25 Commerce 23 Indian ocean 22 Ocean-world 22 Climatic changes 21 Medicine 19 Geography 16 Ocean-atmosphere interaction 16 Ocean 14 Ocean circulation 14 Ocean travel 14 Security analysis--Portfolio management 14 Navigation 13 Religion 13 Women 13 Management 12 Oceans 12 Feminism 11 Fishes- Oceans-- Marine fishes 11 Ocean waves 11 Tales-India-Mythology-Hindu 11 Foreign relations 10 India 10