Books by N Jayakumar

Taxonomy of Shellfish is one of the most unique courses in Fisheries Science in view of its importance and implications in diversity. The shellfish includes two highly diversified phyla i.e. Arthropoda and Mollusca which show enormous diversity in their morphology, in the habitats they occupy and in their biology. The correct identification of a candidate species of shellfish is very important for successful aquaculture practices and also for their conservation and management. Further, this book entitled deals with systematic identification of commercially important shellfish species highlighting the important taxonomic characteristics. This book has been written to meet the needs of not only fisheries science students, but also teachers and researchers who need to deal with shellfishes. Written in a textbook form, this book encompasses the knowledge of preservation and cataloguing, classification and identification of the phyla Arthropoda and Molllusca. If this book could help and guide the students and researchers, we shall feel amply rewarded. The book contains 15 chapters that have been explained very clearly with numerous illustrative examples, leaving no scope for confusion.

Fisheries tend to collapse because of fleet over-capacity, leading to harvesting the stocks of fish beyond their ability to recover. On the other hand, fish stocks may also be under-utilized because of fleet under-capacity. The fishery managers have to strike a balance by directly controlling the fishing capacity (input control) and/or by setting restrictions on the catch (output control). The key factor in the success of striking this balance is the application of fisheries management based on scientific advice coming from results of stock assessment models. This book entitled "Fish Population Dynamics and Stock Assessment" has been written to meet the requirements of graduate, post graduate students, researchers and scientists in fish stock assessment. Written in a textbook form, this book encompasses the knowledge of principles of stock assessment, sampling techniques, age determination, growth parameters, mortality parameters, gear selection, stock assessment models, fisheries management etc. If this book could help and guide the students and researchers, we shall feel amply rewarded. The book contains 16 chapters that have been explained very clearly with numerous illustrative examples, leaving no scope for confusion.