The first edition of this book was published in 1995 that deals with various sectors of the poultry industry in hot climates. The new second edition includes 12 chapters, wherein three are new and not included in the first edition. Chapter 1 covers an overview of the poultry industry in the warm region which is completely revised with new tables of production and consumption figures. Chapters 2 and 4 are not revised or changed in any way that discusses the breeding for heat resistance, and the behavioural, physiological, neuroendocrine and molecular responses of chickens to heat stress, respectively. Chapter 3 discusses breeding fast-growing, high-yield broilers for hot climates and serves as an update of Chapter 2. Chapter 5 discusses housing improvement and designs for hot climates. The Chapters 6, 7, 8, 9, 10 and 11 are all updated that discusses the topics on nutrient requirements, feedstuffs used in hot regions, mycotoxins in poultry feeds, broiler feeding and management in hot climates, and replacement pullet and layer feeding and management in hot climates, respectively. Chapter 12 which is new to this edition discusses waterfowl production in hot climates. The second edition has over 300 new references in addition to the 950 that were included in the first edition. This book is intended for veterinarians, animal scientists, animal nutritionists, geneticists, farm owners, farm managers and students.
This chapter deals with feeding and management aspects of broilers in hot climates or during summer months in temperate regions. The certain management practices such as feed withdrawal, drug administration, vaccination, beak trimming, and litter management are discussed. The importance of water quality and quantity as well as lighting programmes to reduce the detrimental effects of heat stress and the benefits of gradual acclimatization of broilers are reviewed.
This chapter discusses the effects of general temperature on the performance of chickens; the energy, protein and amino acid, vitamins and mineral requirements of chickens in high temperature; dietary electrolyte balance; and the role on non-nutrient feed additives in reducing the adverse effects of high temperature stress.
The characteristics and composition of the crude oil extracted from Citrullus colocynthis seeds were examined. Data obtained for the iodine value, saponification number, Reichert-Meissl and others compare well with other edible oils. Thin-layer chromatography in conjunction with gas-liquid chromatography-mass spectrometry revealed over 75% degree of unsaturation major among which were linoleic, 50.6% and oleic acids, 25%. Upon storage, the oil showed relatively low peroxide values that were within the acceptable limits set for other vegetable oils. Animal experimentation trials on the oil using chicks as the experimental animals did not show any toxicity effects. Based on these results, C'itrdlus colocynthis oil might be of some potential use for animal feed and/or human consumption.
This chapter discusses research on breeding for heat resistance and concludes that it is feasible to select for resistance to heat stress, but the challenge of the breeder is to introduce heat stress tolerance, while retaining and improving the economic traits needed in commercial chickens.
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