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569,308 نتائج ل "Fish"
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The puffer fish
The puzzling thing about the pufferfish--or blowfish--is that it's highly toxic, yet some people consider it a delicacy. This book describes how the spikey fish got its name, how it fights off predators, where it lives, the strength of its toxins, and how a skilled chef can render it safe to eat.
Health Maintenance and Principal Microbial Diseases of Cultured Fishes
Health Maintenance and Principal Microbial Diseases of Cultured Fishes, Third Edition is a thoroughly revised and updated version of the classic text. Building on the wealth of information presented in the previous edition, this new edition offers a major revision of the valuable health maintenance section, with new pathogens added throughout the book. Health Maintenance and Principal Microbial Diseases of Cultured Fishes, Third Edition focuses on maintaining fish health, illustrating how management can reduce the effects of disease.  The text is divided into sections on health maintenance, viral diseases, and bacterial diseases, and covers a wide variety of commercially important species, including catfish, salmon, trout, sturgeon, and tilapia. This book is a valuable resource for professionals and students in the areas of aquaculture, aquatic health maintenance, pathobiology, and aquatic farm management.
Tropical fish
Tropical fish are vibrant and beautiful. Some are shy, some are curious, and some are deadly! Learn these things and more alongside beautiful, full-color photographs.
Tilapia culture
Tilapia culture is currently practised in 95 countries all over the world and the number is expected to increase. This book discusses in detail the principles and practices of tilapia culture in the world. It covers all the vital issues of farmed tilapia including: the biology, environmental requirements, semi-intensive culture, intensive culture systems, feed and feeding, reproduction and breeding, spawning and larval rearing, stress and diseases, harvesting and marketing and the role of tilapia culture in rural development. It also highlights and presents the experiences of leading countries in tilapia culture.
Feeding aquaculture in an era of finite resources
Aquaculture's pressure on forage fisheries remains hotly contested. This article reviews trends in fishmeal and fish oil use in industrial aquafeeds, showing reduced inclusion rates but greater total use associated with increased aquaculture production and demand for fish high in long-chain omega-3 oils. The ratio of wild fisheries inputs to farmed fish output has fallen to 0.63 for the aquaculture sector as a whole but remains as high as 5.0 for Atlantic salmon. Various plant- and animal-based alternatives are now used or available for industrial aquafeeds, depending on relative prices and consumer acceptance, and the outlook for single-cell organisms to replace fish oil is promising. With appropriate economic and regulatory incentives, the transition toward alternative feedstuffs could accelerate, paving the way for a consensus that aquaculture is aiding the ocean, not depleting it.
The dragon behind the glass : a true story of power, obsession, and the world's most coveted fish
A journalist's quest to find a wild Asian arowana--the world's most expensive aquarium fish--takes her on a global tour through the bizarre realm of ornamental fish hobbyists to some of the most remote jungles on the planet.
Early life history of marine fishes
The life cycles of fishes are complex and varied, and knowledge of the early life stages is important for understanding the biology, ecology, and evolution of fishes. InEarly Life History of Marine Fishes,Bruce S. Miller and Arthur W. Kendall Jr., bring together in a single reference much of the research available and its application to fishery science-knowledge increasingly important because for most fishes, adult populations are determined at the earliest stages of life. Clear and well written, this book offers expert guidance on how to collect and analyze larval fish data and on how this information is interpreted by applied fish biologists and fisheries managers.