Abstract
<jats:p>Freshwater aquaculture stands at a remarkable crossroads. It is at once an ancient practice—rooted in the careful husbandry of fish, crustaceans, molluscs, and aquatic plants in inland waters—and a rapidly evolving modern enterprise shaped by science, technology, and shifting societal expectations. As capture fisheries face ecological limits and demand for nutritious, affordable animal protein continues to rise, freshwater aquaculture has become one of the most significant food-producing sectors in the world, with direct implications for livelihoods, rural development, trade, and environmental stewardship. This book was conceived to address a simple but urgent need: a clear, integrated view of where freshwater aquaculture is today, why it looks the way it does, and where it may be heading. Too often, discussions of aquaculture polarize into celebration or critique—either portraying it as an unqualified solution to food insecurity or as an unavoidable environmental burden. Reality is more complex, and more promising. Freshwater aquaculture is neither inherently sustainable nor inevitably damaging; it is a set of practices and systems whose outcomes depend on choices—biological, managerial, economic, and political. Understanding those choices, and their trade-offs, is the first step toward making the sector more resilient and responsible. The “present” of freshwater aquaculture is characterized by diversity. It includes small family ponds integrated with rice fields and livestock; medium-scale farms producing carp, tilapia, catfish, and freshwater prawns; and intensifying systems driven by improved genetics, formulated feeds, mechanized aeration, and better health management. It spans climates and cultures, from tropical polycultures to temperate recirculating facilities, and from subsistence-oriented production to highly commercial value chains. Alongside this diversity lies a shared set of core challenges: maintaining water quality, preventing disease, optimizing nutrition and growth, protecting biodiversity, ensuring animal welfare, and safeguarding the profitability of farmers facing volatile input costs and market pressures. The “future” of freshwater aquaculture will be defined by how well it navigates constraints that are already tightening: water availability, land competition, climate variability, the spread of pathogens, and public scrutiny of environmental impacts. Yet the future also holds extraordinary opportunities. Advances in selective breeding, diagnostics, vaccines, probiotics, and precision feeding can reduce losses and improve efficiency. Digital monitoring, remote sensing, and decision-support tools can help farmers manage ponds and tanks with greater predictability. Novel ingredients and circular approaches—using by-products, insects, algae, and integrated systems—can reduce dependence on finite resources. And, crucially, better governance and inclusive value chains can ensure that growth translates into equitable benefits rather than concentrated gains. This volume is written for students, researchers, extension professionals, farm managers, policymakers, and readers who want a grounded understanding of freshwater aquaculture without losing sight of its broader significance. While individual chapters may differ in disciplinary focus—biology, engineering, economics, ecology, health management, and planning—they share a common intention: to connect principles with practice, and evidence with implications. The aim is not only to describe systems, but to illuminate how they function, where they fail, and how they can be improved. If there is one message that threads through these pages, it is that freshwater aquaculture is ultimately a human endeavour shaped by knowledge and responsibility. Its future will not be determined solely by production targets or technological breakthroughs, but by the values embedded in everyday decisions: how water is used, how wastes are handled, how risks are distributed, how workers and communities are treated, and how ecosystems are respected. A sector that feeds millions must also earn trust—through transparency, accountability, and continuous improvement. We invite you, therefore, to read this book as both a reference and a conversation. May it sharpen your technical understanding, broaden your perspective on sustainability and development, and encourage you to think critically about what “progress” should mean for freshwater aquaculture. The choices made today—on farms, in laboratories, in boardrooms, and in government offices—will shape the sector’s contribution to nutrition, livelihoods, and ecosystems for decades to come. The story of freshwater aquaculture is still being written; our hope is that this book helps you write its next chapter wisely.</jats:p>