India is one of the leading nations in the world in the abundance of inland water resources. Reservoirs constitute the single largest inland fishery resource, both in terms of resource size and productive potential. Reservoirs in Kerala are situated in unique geo-climatic conditions. Reservoirs are human engineered habitats that occur in almost all major river basins in India. When the rivers are impounded, qualitative and quantitative changes in their biota are bound to occur. Effect of such changes in the physico-chemical environment, fish diversity and fish yield are significant in order...

The immunomodulatory effect of Bacopa monnieri (Brahmi) in enhancing stress tolerance in Labeo rohita (Rohu) have been demonstrated in this book. The effect of Brahmi on the specific activities of the antioxidant enzymes, superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) in Labeo rohita fingerlings fed with Brahmi incorporated feed and to study the changes in the activities of these enzymes after exposure to low temperature stress.

Ornamental fish keeping is becoming popular as a relaxing and stress relieving hobby, throughout the world. The growing interest in aquarium fishes has resulted steady increase in aquarium fish trade, globally. The culture of ornamental fish envisages not only the production but also improvement of their colour and aesthetic beauty to suit the requirement of consumers. The colouration in ornamental fishes is due to the presence of colour pigments known as carotenoids. Xiphophorus helleri (red variety) is one of the most commercially important ornamental fish more frequently seen in aquarium...

Remote Sensing and geographic information system (GIS) play a very important role in fishery assessment and forecasting, pollution monitoring, research and management by providing synoptic oceanic measurements. The course manual entitled "Remote Sensing and GIS for Fisheries Management" provides information on various aspects of Remote Sensing and GIS and its application in fisheries resource management. Chapters covered in this publication are Introduction about Remote Sensing and GIS, Basic terms and concepts involved in Remote Sensing and GIS, History of remote sensing, Electromagnetic...

A rapid expansion of fisheries is demanding an adequate supply of efficient, nutritious and inexpensive fish feed, because feed contributes highly to the cost of fish production. Feeds form an essential component of successful fish farming. Feed costs can account for up to 70% of the total operating cost in aquaculture. Therefore there is a urgent need to reduce feed cost significantly in order to increase the profit margin. Waste generation is major problems in vegetable as well as fish processing. The volumes of waste generated as well as resultant environmental impacts necessitate the...

Small pelagics are diverse group of planktivorous fishes, attain maximum length of less than 35 centimeters and maximum weight of less than 500 grams and inhabit usually above the continental shelf, about 119 species of small pelagics belonging to 8 families and 32 genra have been reported from Indian waters, off which around 50 species supports major fisheries. Small pelagics, with an annual average of 7.33 lakh tonnes formed 50.9% of the total pelagic catches and 26.9% of the total marine catch of India during 1991 to 2012. Average annual small pelagic fish production increased from 4.74...

Marine ecosystems are complex habitats ranges from highly productive near-shore coastal habitats to the deep sea floor inhabited only by specialized organisms. They are important to humankind both ecologically and economically. Unfortunately, human activities are putting marine ecosystems under pressure across world. Worldwide deterioration of marine biodiversity call for Conservation Strategy to conserve the biodiversity which supports the sound structure and function of marine ecosystems to utilize ecological services of the ocean in a sustainable manner. A theme of this teaching manual is...