Examination Of The Effects Of Dietary Protein And Lipid On Growth And Stress Response Of Nile Tilapia Cultured In High Intensity Systems

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Examination of the Effects of Dietary Protein and Lipid on Growth and Stress Response of Nile Tilapia Cultured in High Intensity Systems

Author : Christopher Gary Hooley
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (84 download)

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Book Synopsis Examination of the Effects of Dietary Protein and Lipid on Growth and Stress Response of Nile Tilapia Cultured in High Intensity Systems by : Christopher Gary Hooley

Download or read book Examination of the Effects of Dietary Protein and Lipid on Growth and Stress Response of Nile Tilapia Cultured in High Intensity Systems written by Christopher Gary Hooley and published by . This book was released on 2012 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tilapia is the second most consumed farmed fish, after carp, and the most widely grown of any farmed fish. Significant feed price increases in recent years threaten sustainability of the industry. In the US tilapia are often subjected to extended hauling to reach live-fish markets. Therefore, the objectives of the current study were to optimize dietary protein and lipid levels for juvenile tilapia cultured in high-intensity recirculating-water system and assess how dietary changes alter hauling stress-tolerance. To achieve these objectives, a 3 X 3 factorial design was used with practical-type diets formulated to contain three levels of dietary protein (28, 32 and 36%) and three levels of dietary lipid (3, 6, and 9%). Juvenile tilapia (34.5 ± 0 .4g initial weight) were fed one of the nine diets, three feedings/d to apparent satiation, six d/wk for 12wk. Fish were weighed and counted every three weeks and feed consumed recorded weekly. At the conclusion of the feeding trial, three fish per tank were sampled for proximate composition analyses. One week post-conclusion of the feeding trial, tilapia remaining in each tank were subjected to a simulated live haul in which fish were transferred to insulated container (2lbs/gallon) with supplemental oxygen for 24h, and then returned to their source tank and allowed to recover for an additional 48h. Hematocrit, glucose, lactate and cortisol measurements were collected at time 0, 24h, and 72h. Increasing dietary protein significantly improved tilapia weight gain (P=0.01), feed conversion (FCR, P=0.03), feed intake (P=0.02), protein retention (P=0.01) and filet ratio (P=0.01). Increasing dietary lipid also significantly improved weight gain (P=0.05) and FCR (P=0.01) but at 9% decreased feed intake (P=0.02). Blood chemistry values were also altered by dietary protein and lipid levels (Figure 1). No significant interactions between dietary protein and lipid levels on growth performance or blood chemistry values were measured. Results of this study suggest that while increasing protein and lipid levels in tilapia diet formulations improved production of tilapia cultured in high intensity systems and that, stress tolerance during live hauls appeared to be reduced.

Tilapia Culture

Author : Abdel-Fattah M. El-Sayed
Publisher : Academic Press
ISBN 13 : 0128165413
Total Pages : 358 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Tilapia Culture by : Abdel-Fattah M. El-Sayed

Download or read book Tilapia Culture written by Abdel-Fattah M. El-Sayed and published by Academic Press. This book was released on 2019-10-16 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tilapia Culture, Second Edition, covers the vital issues of farmed tilapia in the world, including their biology, environmental requirements, semi-intensive culture, intensive culture systems, nutrition and feeding, reproduction, seed production and larval rearing, stress and disease, harvesting, economics, trade, marketing, the role of tilapia culture in rural development and poverty eradication, and technological innovations in, and the environmental impacts of, tilapia culture. In addition, the book highlights and presents the experiences of leading countries in tilapia culture, thus making it ideal for tilapia farmers and researchers who seek the most relevant research and information. The new second edition not only brings the most updated information within each chapter, but also delivers new content on tilapia transfers, introductions and their impacts, the use of probiotics and other additives in tilapia culture, tilapia trade, including marketing, and sustainability approaches and practices, such as management practices, ecosystem approaches to tilapia culture, and value chain analyses of tilapia farming. Presents the biology of tilapia, including taxonomy, body shapes, geographical distribution, introductions and transfers, gut morphology, and feeding habits Covers semi-intensive tilapia culture in earthen ponds, tanks, raceways, cages, recirculating systems, and aquaponics Provides the latest information on brood stock management, production of monosex tilapia, seed production, and larval rearing under different culture systems Highlights the most common infectious and non-infectious diseases affecting farmed tilapia, with a full description of disease symptoms and treatment measures Provides an in-depth exploration of tilapia economics, trade and marketing

Nutrient Requirements of Fish and Shrimp

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309216192
Total Pages : 810 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis Nutrient Requirements of Fish and Shrimp by : National Research Council

Download or read book Nutrient Requirements of Fish and Shrimp written by National Research Council and published by National Academies Press. This book was released on 2011-05-25 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquaculture now supplies half of the seafood and fisheries products consumed worldwide and is gaining international significance as a source of food and income. Future demands for seafood and fisheries products can only be met by expanded aquaculture production. Such production will likely become more intensive and will depend increasingly on nutritious and efficient aquaculture feeds containing ingredients from sustainable sources. To meet this challenge, Nutrient Requirements of Fish and Shrimp provides a comprehensive summary of current knowledge about nutrient requirements of fish and shrimp and supporting nutritional science. This edition incorporates new material and significant updates to information in the 1993 edition. It also examines the practical aspects of feeding of fish and shrimp. Nutrient Requirements of Fish and Shrimp will be a key resource for everyone involved in aquaculture and for others responsible for the feeding and care of fish and shrimp. It will also aid scientists in developing new and improved approaches to satisfy the demands of the growing aquaculture industry.

Sustainable Aquafeeds

Author : Jose M. Lorenzo
Publisher : CRC Press
ISBN 13 : 1000469212
Total Pages : 256 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Sustainable Aquafeeds by : Jose M. Lorenzo

Download or read book Sustainable Aquafeeds written by Jose M. Lorenzo and published by CRC Press. This book was released on 2021-11-15 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquaculture, the youngest, fastest-growing, and most dynamic protein-producing industry, has the key advantage of efficient use of feed that allows farmed fish to be competitively priced compared with terrestrial proteins. Sustainable Aquafeeds: Technological Innovation and Novel Ingredients explores the present and future evolution of feeds, explains the current challenges for aquaculture, and considers how advances in technologies and ingredients can produce aquafoods for the increasing world population. International contributors to this book provide state-of-the-art information on the profile of the aquafeed industry, including factors affecting supplies and prices of key ingredients for aquafeed production. An entire set of chapters covers the scientific advances and feed industry initiatives in accordance with modern consumer trends, updating readers on the most promising strategies. These include the use of novel ingredients for nutrient supplementation and the enhancement of their use by genetic selection. The authors hope to inspire a collaboration of NGOs, researchers, and private partnerships to replace wild-caught ingredients by accelerating and supporting the scaling of innovative, alternative, aquaculture feed ingredients, including bacterial meals, plant-based proteins, algae, and yeast.

The Physiological and Molecular Response of Aquatic Animals to Environmental Stresses

Author : Lingling Wang
Publisher : Frontiers Media SA
ISBN 13 : 2832501680
Total Pages : 297 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis The Physiological and Molecular Response of Aquatic Animals to Environmental Stresses by : Lingling Wang

Download or read book The Physiological and Molecular Response of Aquatic Animals to Environmental Stresses written by Lingling Wang and published by Frontiers Media SA. This book was released on 2022-10-06 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Tilapia

Author : Carl D Webster
Publisher : CRC Press
ISBN 13 : 1560223189
Total Pages : 705 pages
Book Rating : 4.5/5 (62 download)

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Book Synopsis Tilapia by : Carl D Webster

Download or read book Tilapia written by Carl D Webster and published by CRC Press. This book was released on 2006-08-21 with total page 705 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn to maximize tilapia production in different areas around the world Tilapia is the second-most cultured fish species in the world, and its production is increasing each year. However, for several reasons profit margins remain slim. Tilapia: Biology, Culture, and Nutrition presents respected international experts detailing every aspect of tilapia production around the world. Biology, breeding and larval rearing, farming techniques, feeding issues, post-harvest technology, and industry economics are clearly presented. This concise yet extensive reference provides the latest research and practical information to efficiently and economically maximize production in diverse locales, conditions, and climates. Tilapia: Biology, Culture, and Nutrition comprehensively explores all types of tilapia with a detailed biologic description of the fish that takes readers from egg through harvesting. The book authoritatively discusses production issues such as feed nutrition, temperature, water quality, parasites, and disease control to guide readers on how to best encourage fast, efficient growth. Economic and marketing information are examined, including industry data and projections by country. Each chapter approaches a specific facet of tilapia and provides the most up-to-date research available in that area. This resource gives the most current, detailed information needed for effective tilapia farming in one compact economical volume. Extensively referenced with an abundance of clear, helpful tables, photographs, and figures. Tilapia: Biology, Culture, and Nutrition discusses in detail: complete biology, including sex ratios, optimum temperatures for growth and spawning, water quality parameters, and disease tolerance industry predictions hormonal control of growth genetic improvement sex determination, manipulation, and control seed production culture practices earthen and lined pond production culture in flowing water cage culture feed formulation and processing, and feeding management soil, water, and effluent quality saline tolerance levels with optimum rate of acclimation to seawater polyculture of tilapia with shrimp bottom soil conditions nutrient requirements with non-nutrient components parasites and diseases Tilapia: Biology, Culture, and Nutrition is essential reading for aquaculturists, nutritionists, geneticists, hatchery managers, feed formulators, feed mill operators, extension specialists, tilapia growers, fish farmers/producers, educators, disease specialists, aquaculture veterinarians, policy makers, educators, and students.

Microbiota, Nutrition and Stress: Modulators of Immunity

Author : Sergey Ponomarev
Publisher : Frontiers Media SA
ISBN 13 : 2832540414
Total Pages : 157 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Microbiota, Nutrition and Stress: Modulators of Immunity by : Sergey Ponomarev

Download or read book Microbiota, Nutrition and Stress: Modulators of Immunity written by Sergey Ponomarev and published by Frontiers Media SA. This book was released on 2023-12-01 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Nutrient Requirements of Fish

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 9780309048910
Total Pages : 132 pages
Book Rating : 4.0/5 (489 download)

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Book Synopsis Nutrient Requirements of Fish by : National Research Council

Download or read book Nutrient Requirements of Fish written by National Research Council and published by National Academies Press. This book was released on 1993-02-01 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using the latest research in fish nutrition, this volume revises and combines the 1981 edition on coldwater fish and the 1983 edition on warmwater fish and shellfish. In addition to updating requirements for energy, protein, minerals, and vitamins, this book provides, for the first time, summary tables on nutrient requirements of a variety of fish species, including channel catfish, rainbow trout, Pacific salmon, carp, and tilapia. Tabular data on amino acid requirements of 11 species are also included. Shellfish are not included in this edition because of lack of scientific information.

Effect of Dietary Lipid Sources on the Reproductive Performance of Nile Tilapia Oreochromis Niloticus

Author : Ali Hajizadeh Kapateh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (757 download)

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Book Synopsis Effect of Dietary Lipid Sources on the Reproductive Performance of Nile Tilapia Oreochromis Niloticus by : Ali Hajizadeh Kapateh

Download or read book Effect of Dietary Lipid Sources on the Reproductive Performance of Nile Tilapia Oreochromis Niloticus written by Ali Hajizadeh Kapateh and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: AbstractTraditionally, fish oil (FO) has been used extensively in aquafeeds. The stagnation in global fish oil production coupled with an increased demand for its use in aquaculture feeds, especially salmonid feeds, has greatly inflated fish oil prices. Therefore, in order to sustain the rapid growth of the tilapia industry, the dependence on these commodities in feeds should be reduced through use of cheaper and more sustainable sources of dietary lipids, such as palm oil. This study therefore investigated several, previously poorly understood, effects of palm oil on reproductive performance of the commercial tilapia species, Oreochromis niloticus; which currently ranks as second most popular species in world aquaculture. In the present study broodstock were fed on experimental diets at full and half ration regimes throughout their entire life cycle from exogenous feeding. Studies were conducted in standardised and controlled hatchery conditions, thereby reducing the potential influence of environmental variations. First feeding O. niloticus fry were fed on four diets, cod liver oil (D 1), palm oil (D 2), mixed palm and cod liver oil (D 3) (9:1 ration) and a commercial trout diet as control (D 4) (Skretting, U.K.) on a reducing ration based on fish size. The present study investigated the effect of dietary lipid sources on (1) growth performance, (2) biochemical composition of eggs (total lipid and fatty acid composition), (3) morphological parameters of eggs (total and relative fecundity, egg size, egg weight and EW:BW), (4) larval quality (larval length and weight) and (5) oocyte recruitment and its associated sex steroid hormones. Experimental diets and feeding ration significantly influenced (p0.05) the growth performance over a period of 120 days. Total lipid and fatty acid composition of eggs originating from broodstock fed on palm oil, mixed palm and cod liver oil (9:1) or a control diet were not significantly different (P0.05) when fed at either full (3% BWday-1) or half ration (1.5% BWday-1). The present study, however, confirmed that fatty acid composition of fish eggs reflected the fatty acid composition of the diet, although specific fatty acids were selectively utilized or retained in the eggs. The mean inter-spawning interval (ISI) increased with increasing fish size and averaged 14, 19 and 24 days for fish fed on palm oil, mixed palm and cod liver oil or control diets, respectively. The shortest ISI observed was 7 days for fish fed a palm oil diet. Total fecundity ranged from 660 - 820 eggs/clutch. Mean total fecundity was 750, 820 and 660 eggs/clutch for fish fed a palm, mixed palm and cod liver oil or a control diet, respectively, but these differences were not significant (P>0.05). However, relative fecundity and egg weight to body weight rates as a percentage (EW: BW) were found significantly differ (p0.05) between fish fed the control diet and experimental diets. Mean egg diameter (2.2 mm) was not significantly influenced (p0.05) by experimental diets. The egg volume, egg dry and wet weight, fertilisation and hatching rate were also not significantly different between fish fed the experimental diets. Oocyte development was classified into distinct stages based upon oocyte size, biochemical properties and structure. The recrudescence to these stages was not significantly influenced by broodstock fed experimental diets either at full or half ration. Steroid hormones and histological analyses provided valuable data concerning the oocyte development and recruitment in this species. Levels of 17?-oestradiol (E2) and testosterone (T) peaked within 6 days of spawning, suggesting that vitellogenesis began as early as day 2 or 3 post-spawning. By day 6, ovaries were dominated by large late-vitellogenic/maturing oocytes (stages 6 & 7) occupying about 70% of the ovary. Gonadosomatic index (GSI) reached maximal levels by day 6. It is suggested that pre-vitellogenic oocytes are recruited into vitellogenic growth immediately after spawning and complete vitellogenesis on day 6 post-spawning. Finally, the present study investigated the effect of food restriction at two rations (full and half) on broodstock reproductive performance. Oreochromis niloticus were rationed from first feeding and throughout their life-cycle. The dietary regime, full ration (3%) and half ration (1.5%), influenced fish size but despite this variation no significant differences (p>0.05) were detected in total lipid and fatty acid composition in the eggs, total fecundity, egg diameter, total egg volume and larval size. These results suggested that despite large differences in food availability throughout their life cycle, investment in reproduction had remained remarkably consistent. It appeared that during food restriction, O. niloticus sacrificed body weight and growth so as to maintain reproductive investment. In summary, this study provides valuable information using a novel experimental design on the effects of dietary lipid sources on reproductive performance of female O. niloticus. Substituting palm oil for fish oil as the dietary lipid source and reducing ration by half (1.5% BWday-1) had no significant effect on reproductive performance. Therefore it is suggested that under controlled conditions, lipids of non-marine origin, such as palm oil, can be successfully substituted for broodstock diets. Halving feed requirement should also increase profitability of seed production. KEYWORDS: Tilapia; O. niloticus; palm oil; diet; fecundity; spawning periodicity; oocyte recruitment; reproductive performance.

Functional Feed Additives and Intestinal Health in Aquatic Animals

Author : Gang Yang
Publisher : Frontiers Media SA
ISBN 13 : 2832546676
Total Pages : 128 pages
Book Rating : 4.8/5 (325 download)

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Book Synopsis Functional Feed Additives and Intestinal Health in Aquatic Animals by : Gang Yang

Download or read book Functional Feed Additives and Intestinal Health in Aquatic Animals written by Gang Yang and published by Frontiers Media SA. This book was released on 2024-03-20 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aquaculture in the Ecosystem

Author : Marianne Holmer
Publisher : Springer Science & Business Media
ISBN 13 : 1402068107
Total Pages : 330 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Aquaculture in the Ecosystem by : Marianne Holmer

Download or read book Aquaculture in the Ecosystem written by Marianne Holmer and published by Springer Science & Business Media. This book was released on 2007-12-29 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a scientific forecast of development in aquaculture with a focus on the environmental, technological, social and economic constraints that need to be resolved to ensure sustainable development of the industry and allow the industry to be able to feed healthy seafood products to future generations. The chapters discuss the most critical bottlenecks of the development. They encompass subjects of understanding the environmental impacts, the current state-of-the-art in monitoring programs and in coastal zone management, the important interactions between wild and cultured organisms including release of non-native species into the wild.

Lipids in Aquatic Ecosystems

Author : Michael T. Arts
Publisher : Springer Science & Business Media
ISBN 13 : 0387893660
Total Pages : 395 pages
Book Rating : 4.3/5 (878 download)

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Book Synopsis Lipids in Aquatic Ecosystems by : Michael T. Arts

Download or read book Lipids in Aquatic Ecosystems written by Michael T. Arts and published by Springer Science & Business Media. This book was released on 2009-06-12 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evidence now suggests that the roles of essential fatty acids as growth promoters and as indices of health and nutrition are fundamentally similar in freshwater and marine ecosystems. Lipids in Aquatic Ecosystems integrates this divergent literature into a coordinated, digestible form. Chapters are organized so as to discuss and synthesize the flow of lipids from lower to higher trophic levels, up to and including humans. Linkages between the production, distribution and pathways of these essential compounds within the various levels of the aquatic food webs, and their ultimate uptake by humans and other terrestrial organisms, are highlighted throughout the book. This book will be of interest to researchers and resource managers working with aquatic ecosystems.

Effects of Dietary Nucleotides on Growth, Immunology, and Disease Resistance of Juvenile Nile Tilapia (Oreochromis Niloticus)

Author : Maritza Anguiano
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (812 download)

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Book Synopsis Effects of Dietary Nucleotides on Growth, Immunology, and Disease Resistance of Juvenile Nile Tilapia (Oreochromis Niloticus) by : Maritza Anguiano

Download or read book Effects of Dietary Nucleotides on Growth, Immunology, and Disease Resistance of Juvenile Nile Tilapia (Oreochromis Niloticus) written by Maritza Anguiano and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to improve production efficiency and profitability in tilapia aquaculture, further research is needed to develop methods to improve weight gain, feed utilization, and immune function of these fish. In this regard, numerous studies with several fish species have reported that dietary nucleotides can enhance growth performance, immune responses and disease resistance. Therefore, two feeding experiments were conducted to investigate the effects of a purified nucleotide mix on juvenile Nile tilapia, Oreochromis niloticus. A basal diet was formulated to contain 34% crude protein from fishmeal and soybean meal. A nucleotide mix containing salts of cytidine, uridine, adenosine, inosine, guanosine, and thymine was supplemented to the basal diet at 0.5, 1 and 2% of dry weight. In the first experiment, three replicate groups of 15 fish were fed the experimental diets. At the end of 8 weeks, weight gain, feed efficiency and survival were computed. Blood samples were analyzed for neutrophil oxidative radical production and plasma lysozyme activity. In the second trial, three replicate groups of 20 fish were fed the same experimental diets. At the end of 4 weeks, blood and kidney samples were analyzed for macrophage extracellular and intracellular superoxide anion production, blood neutrophil oxidative radical production, plasma lysozyme activity, and peripheral blood lymphocyte proliferation. Then, 12 fish per treatment were challenged with Streptococcus iniae, via intraperitoneal injection, and mortality was recorded for 21 days. Results showed that none of the nucleotide-supplemented diets induced significant (P

Complete Plays and Prose

Author : Georg Büchner
Publisher : Macmillan
ISBN 13 : 0809032309
Total Pages : 214 pages
Book Rating : 4.8/5 (9 download)

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Book Synopsis Complete Plays and Prose by : Georg Büchner

Download or read book Complete Plays and Prose written by Georg Büchner and published by Macmillan. This book was released on 1963 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leonce and Lena: There are two imaginary countries: the Kingdom of Popo and the Kingdom of Pipi. Prince Leonce of the Kingdom of Popo and Princess Lena of the Kingdom of Pipi have had their political marriage arranged.

Agrindex

Author :
Publisher :
ISBN 13 :
Total Pages : 908 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Agrindex by :

Download or read book Agrindex written by and published by . This book was released on 1995 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Biology of Stress in Fish

Author : Carl B. Schreck
Publisher : Academic Press
ISBN 13 : 0128027371
Total Pages : 604 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Biology of Stress in Fish by : Carl B. Schreck

Download or read book Biology of Stress in Fish written by Carl B. Schreck and published by Academic Press. This book was released on 2016-11-01 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biology of Stress in Fish: Fish Physiology provides a general understanding on the topic of stress biology, including most of the recent advances in the field. The book starts with a general discussion of stress, providing answers to issues such as its definition, the nature of the physiological stress response, and the factors that affect the stress response. It also considers the biotic and abiotic factors that cause variation in the stress response, how the stress response is generated and controlled, its effect on physiological and organismic function and performance, and applied assessment of stress, animal welfare, and stress as related to model species. Provides the definitive reference on stress in fish as written by world-renowned experts in the field Includes the most recent advances and up-to-date thinking about the causes of stress in fish, their implications, and how to minimize the negative effects Considers the biotic and abiotic factors that cause variation in the stress response

Tilapias: Biology and Exploitation

Author : M.C.M Beveridge
Publisher : Springer Science & Business Media
ISBN 13 : 9401140081
Total Pages : 517 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Tilapias: Biology and Exploitation by : M.C.M Beveridge

Download or read book Tilapias: Biology and Exploitation written by M.C.M Beveridge and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: Referred to in the Bible, pictured on the wall-friezes of ancient Egyptian tombs, and a subject of fascination for generations of scientists, the tilapias (Cichlidae: Tilapiini) have featured in the diet and culture of humankind for thousands of years. The present century has seen their spread from Africa throughout the tropics and sub-tropics, largely for food and fisheries purposes. This book attempts to pull together our knowledge of this important group - their biology and fisheries and aquaculture - in a single volume, something that has not been done comprehensively for nearly two decades. A succession of chapters by acknowledged authorities covers evolution, phylogenetic relationships and biogeography, reproductive biology, mating systems and parental care, diet, feeding and digestive physiology, environmental physiology and energetics, the role of tilapias in ecosystems, population dynamics and management, genetics, seed production, nutrition, farming, economics and marketing. The book is aimed at biologists, fisheries scientists, aquaculturists, and all interested in aquatic ecology.