Aquatic ecosystems play a vital role in maintaining environmental balance, supporting biodiversity, and sustaining food production systems across the world. Aquatic Ecosystems and Sustainable Aquaculture provides a comprehensive understanding of the ecological principles, biological processes, and management practices associated with aquatic environments and aquaculture systems. The book systematically explains the structure and functioning of aquatic ecosystems, including energy flow, nutrient cycling, food chains, microbial activities, and ecological interactions that influence aquatic productivity and sustainability.

The text further explores modern aquaculture concepts, production systems, ecosystem-based approaches, integrated farming practices, nutrient recycling, reservoir fisheries, and sustainable health management techniques. Special emphasis is given to eco-friendly aquaculture practices, organic waste utilization, climate change impacts, probiotics, bioremediation, and conservation of aquatic resources. Designed for undergraduate and postgraduate students, researchers, extension professionals, and practitioners in fisheries and aquaculture sciences, this book serves as a valuable resource for understanding environmentally sustainable and economically viable aquatic production systems.

Chapter 1. Introduction to Aquatic Ecosystems
Chapter 2. Physical and Biological Components of Aquatic Ecosystems
Chapter 3. Ecological Structure and Functions of Aquatic Ecosystems
Chapter 4. Energy Flow and Matter Cycling in Aquatic Ecosystems
Chapter 5. Food Chain and Food Web in Aquatic Systems
Chapter 6. Organic Matter Recycling and Nutrient Cycles
Chapter 7. Heterotrophic Activities in Aquatic Ecosystems
Chapter 8. Eutrophication and Aquatic Pollution
Chapter 9. Definition, Scope, and Importance of Aquaculture
Chapter 10. Trends, Constraints, and Future of Aquaculture
Chapter 11. Types of Aquaculture Systems
Chapter 12. Pre-Stocking, Stocking, and Post-Stocking Management
Chapter 13. Natural Productivity and Carrying Capacity
Chapter 14. Natural Food and Feeding Behavior of Aquatic Organisms
Chapter 15. Ecosystem-Based Aquaculture
Chapter 16. Integrated Farming Systems in Aquaculture
Chapter 17. Organic Wastes and Nutrient Recycling in Aquaculture
Chapter 18. Use of Animal Waste and Agro-Residues
Chapter 19. Reservoir Fisheries and Culture Techniques
Chapter 20. Health Management and Sustainable Practices in Aquaculture