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In Ecology one studies about the habitat,habits of plants & animals with reference to the abiotic & biotic factors that they have to face 7 overcome, in short.

Environmental Science is about studying all the aspects of different environments,how plants & animals effect & mold environment & how anthropogenic actions effect the environment.What precautions & remedies can be taken up to rectify the problems.

In Fisheries & Wild life,one studies about forms of life in aquatic & terrestrial systems & how they interact with one another.Which steps needs to be taken to sustain life in both the realms & increase biota production,keeping conservation in mind- in short.

The last two are equally important & it depends which region/state gives adequate importance to the subject.In recent years,Environmental Science is now in focus,especially,due to the various types of impact that new factories/plants have on different types of environments.