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221	The efficiency of tropical relevant major genes in a dual purpose layer strain in the subtropical coastal region of South-East Africa Garces, Alice P.J.T. 13 July 2006 (has links) Biological and economic efficiencies of major genes for feather reduction (naked neck and frizzle) and body size reduction (dwarf) in a dual purpose layer strain were evaluated in the subtropical coastal region of South-East Africa (Maputo, Mozambique). The experimental material consisted of eight different genetic groups, two diets (14.4 and 16.2% crude protein) and two climatic seasons. Birds were caged individually in an open-side shelter with natural light. Traits measured were: temperature and relative humidity, body weight, age at first egg, egg weight, egg production, egg quality, feed intake and mortality. The following were calculated: temperature-humidity index (THI), growth rate, persistence, egg mass, feed efficiency, feed conversion, biological efficiency (EM/BWO.75) and productivity (EN/BWo. 75). The main results show that: (1) none of the feather-reduced genes significantly improved egg production or the efficiency of feed utilization, although the naked neck (Na) excelled in terms of the number and mass of eggs produced per metabolic body weight; (2) the dwarf gene (dw) was associated with delayed sexual maturity, production of fewer and lighter eggs, higher persistence, better feed conversion and higher survivability; (3) climatic seasonal effects were observed in all traits analysed, with elevated temperatures restraining body weight gain, the number and weight of the eggs produced, and voluntary feed intake; (4) the lower dietary protein content resulted in decreased egg weight. It was concluded that the normal feathered dwarf is the most suitable genetic group for peri-urban and rural production systems in this region. / Thesis (PhD (Animal Science))--University of Pretoria, 2007. / Animal and Wildlife Sciences / unrestricted Poultry genetics mozambique Poultry breeding mozambique UCTD
222	The influence of comb type on growth rate in the domestic fowl Crober, Donald Curtiss. January 1964 (has links) No description available. Poultry -- Research. Genetics. Animal Science. Poultry -- Breeding.
223	Factors affecting the incidence of breast blisters in young market turkeys Rasplicka, Louis D January 2011 (has links) Digitized by Kansas State University Libraries Turkeys--Diseases Poultry--Housing
224	The role of fat in the growing chick James, Thomas Milton January 2011 (has links) Typescript, etc. / Digitized by Kansas State University Libraries Poultry--Feeding and feeds
225	The immature fowl gonad as affected by gonadotropic and male hormones Lockhart, Charles Howard January 2011 (has links) Typescript, etc. / Digitized by Kansas State University Libraries Poultry--Physiology Hormones, Sex
226	Part one : phosphatase and inorganic phosphorus in the plasma and whole blood of the fowl ; Part two : fluctuations of the phosphatase and inorganic phosphorus in the blood of the laying hen during the period of egg formation / Phosphatase and inorganic phosphorus in the plasma and whole blood of the fowl Parrish, Donald Baker January 2011 (has links) Typescript, etc. / Digitized by Kansas State University Libraries Phosphorus in the body Poultry--Physiology
227	A comparison of the resistence of three breeds of chickens to the nematode, Ascaridia lineata Glading, Ben. January 1933 (has links) Call number: LD2668 .T4 1933 G55 Poultry--Diseases. Masters theses
228	Comparative resistance among different breeds of chickens to the round worm Ascaridia lineata (Schneider) Eisenbrandt, Leslie Lee. January 1934 (has links) Call number: LD2668 .T4 1934 E51 Poultry pests. Masters theses
229	A comparison of the resistance of White Leghorn and White Minorca chickens to Ascaridia lineata (Schneider) Wilmoth, James Herdman. January 1934 (has links) Call number: LD2668 .T4 1934 W52 Poultry--Diseases. Masters theses
230	The importance of herbage in poultry management Gish, Clarence Lee. January 1939 (has links) Call number: LD2668 .T4 1939 G51 / Master of Science Poultry--Nutrition. Masters theses

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