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1961. Analysis of carotenoids in corn grain. J. Agric. Fd. Chem. 9: 132-135. Reiser, R., 1950. The metabolism of polyunsaturated fatty acids in growing chicks. J. Nutr. 42: 325-336. Salmon, R. E., and J. B. O'Neil, 1973a. The effect of the level and source and a change of source of dietary fat on the fatty acid composition of the depot fat and the thigh and breast meat of turkeys as related to age. Poultry Sci. 52: 302-314.ABSTRACT Supplemental calcium sources for Red x Rock sex-linked females were studied. Each of six treatments involved seven replicates of 24 birds or a total of 168 birds per treatment. Beginning at 33 weeks of age, the supplemental calcium in the diets was supplied by 1) granular limestone, 2) aragonite, 3) oyster shell, 4) clam shell, 5) egg shell and 6) egg shell with ration modification to utilize the protein in the egg shell meal.There were statistically significant supplemental calcium source differences among treatment means in overall hen-day but not in overall hen-housed egg production or in feed efficiency, livability, body weight, egg weight, or egg shell thickness at any age sampled. Haugh unit values for the group receiving aragonite as the supplemental calcium source were significantly greater than for the groups receiving clam shells or limestone at 56 weeks of age but at the other ages sampled, no significant treatment differences existed. ABSTRACTSerotonin (5-hydroxytryptamine) injected 8 hours before the expected time of ovulation effectively blocked ovulation (90%). When serotonin was administered for 10 days, the ovarian weight, number follicles, adrenal weights, and ovulation rate were significantly changed (P £ .05). Serotonin or reserpine treatment induced premature oviposition if the egg was in the genital tract. It was suggested from this study that there is stimulation for ovulation at 8 hour before ovulation which can be inhibited by serotonin.

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A high incidence of feather follicle infection was observed in broilers reared in cages with wood slat floors. The incidence of feather follicle infection was significantly higher for males than for females within cage-reared broilers at 59 days of age. Male broilers at 50 days of age had a significantly lower incidence of the feather follicle condition than hatch mates at 59 days of age. Intact feather follicles were removed from freshly killed cage-reared birds and prepared for scanning electron microscopy (SEM). Examination of infected follicles revealed surface detail about the lesions. Removal of the encrustations covering the infected follicles revealed numerous cocci type bacteria at the base of the follicle. Infected and non-infected follicles were also examined by conventional histological techniques. Gram positive cocci were observed at the base of the infected follicles.