Economic progress and ecological balance always have conflicting interests. The necessities and comforts of human beings, invariably robs the ecological structure, of the nature. One such activity is harvesting. This, more often than not,leads to the extinction of a species of life. The exploitation of fish populations provides some classic examples of disastrous exploitation of renewable resources. Often it is possible to prevent such extinction by proper management. If a particular species is on the brink of extinction,then a properly planned regulating policy ensures the damage to the ecosystem is minimal and saves it from the extinction.This book provides an insight into the conservation and management aspects of the fishery, which is largely unregulated. Four different models are introduced, considering taxation as a control instrument and gompertz model. Also realistic catch rate, Stability, and optimal harvest policy is thoroughly analyzed.So this book will be a great help to the biologists,conservationists,scientists,researchers and anyone,who takes keen interest in the field of conservation and management of natural resources.