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Showing papers in "Poultry Science in 1937"


Journal ArticleDOI
TL;DR: A number of methods for obtaining semen from the fowl have been described, including mating a cock to a hen and immediately securing the fluid from the cloaca of the hen.

812 citations


Journal ArticleDOI
TL;DR: The reproductive cycle of the turkey bears the most striking similarity to that of birds in the wild state and is very favorable material for studies relating to the experimental modification of the breeding season.

46 citations


Journal ArticleDOI
TL;DR: An acute hemorrhagic enteritis was found at the autopsy of 35 turkey poults during the months of June, July and August of 1936, and in the majority of instances the birds that were examined were found to be well developed.

45 citations


Journal ArticleDOI
TL;DR: In this article, Tully et al. reported the results of experiments which demonstrated that high chick embryonic mortality in certain localities was due to deformities in the chick embryos, and these deformities were caused by the feeding of grains containing selenium to the hens.

44 citations


Journal ArticleDOI
TL;DR: It has been demonstrated by various workers that the calcium level in the blood of laying hens varies greatly among the individual hens so, unless the same hen is used for each set of bleedings, the results obtained are not comparable.

34 citations


Journal ArticleDOI
TL;DR: The present study was undertaken to measure the relative importance of some of the chief causes of variation when the chickens are fed and managed in the same manner during the same year.

28 citations


Journal ArticleDOI
TL;DR: A review of literature on the inheritance of size with particular reference to the domestic fowl can be found in this article, where the authors present a review of the literature on domestic domestic birds.

24 citations


Journal ArticleDOI
TL;DR: In early work no attempt was made to determine the humidity of the air surrounding the eggs, consequently the loss of weight reported varied greatly, ranging from 9 to 20 percent for 20 days as mentioned in this paper.

22 citations


Journal ArticleDOI
TL;DR: It has been definitely proved that birds can be successfully raised and maintained without access to any grit, however, several workers have observed that birds without grit consumed more feed per unit gain in weight.

22 citations


Journal ArticleDOI
TL;DR: Investigations have been conducted in the past few years in an attempt to increase knowledge of the relationship between body weight, egg weight, and age at first egg in the domestic fowl, but conclusions concerning their interrelation are difficult to arrive at.

21 citations


Journal ArticleDOI
TL;DR: Hayward, Steenbock, and Bohstedt as mentioned in this paper found that heating the soybean to medium and high temperatures in the commercial methods of oil extraction practically doubled the nutritive value of the protein (grams of growth per gram of protein eaten).


Journal ArticleDOI
TL;DR: Almquist and Stokstad as discussed by the authors reported a second type of abnormality characterized by a very considerable thickening or swelling of the gizzard lining, which not only tended to conceal any crater lesions which might be present, but also led in some cases to the appearance of cracks in the lining which simulated true crater lesions.

Journal ArticleDOI
TL;DR: A defective leg and bone formation occurring in battery fed chickens is referred to and certain fractions of the calcium or phosphorus in the blood differed sufficiently from the normal to explain the cause of the disorder.

Journal ArticleDOI
TL;DR: The effect of the calcium and phosphorus content of the diet of laying pullets and hens on the production and hatchability of eggs has been studied in this article, showing that a high level of calcium intake of laying chickens has a deleterious effect on the ability of their eggs to hatch.

Journal ArticleDOI
TL;DR: In this article, it was observed on the Purdue Poultry Farm that a larger number of infertile hatching eggs are obtained during the late summer and early fall months when the mature males are molting.

Journal ArticleDOI
TL;DR: It has become apparent that in order to secure the most satisfactory results the complete picture should be determined in differential count, since certain metabolic derangements become manifest in a distorted white cell count, whereas the hemoglobin may remain essentially normal.

Journal ArticleDOI
TL;DR: Experiments show in some detail what responses are obtained with varying amounts of mare gonadotropic hormone when injected.

Journal ArticleDOI
TL;DR: Throughout this paper references made to vitamin A refer toitamin A activity regardless of whether its source is vitamin A, carotene or other vitamin A active substances.

Journal ArticleDOI
TL;DR: The literature on this subject has indicated that it is a nutritional problem, that excessive calcium and phosphorus induce it and that certain feed-stuffs, such as rice bran, wheat germ, wheat middlings, and oats, possess a preventive factor.

Journal ArticleDOI
TL;DR: It is generally accepted that environmental conditions affect rates of growth even though environmental influences may be overcome at “maturity,” therefore it would be highly desirable that environmental influences be as nearly identical as possible for animals.


Journal ArticleDOI
TL;DR: The process of egg formation in the fowl for the period that the egg remains in the egg duct is outlined.

Journal ArticleDOI
TL;DR: Hatchability of eggs produced by birds receiving diets containing soybean meal, at least that made from some varieties of soybeans, probably depends on the kinds and amounts of animal protein concentrates included in the same diet.

Journal ArticleDOI
TL;DR: The ability of the chick embryo to orient itself within the shell prior to hatching time is a subject of dispute.

Journal ArticleDOI
TL;DR: The purpose of this report is to attempt to clarify the effect of the relative quantity of xanthophylls consumed on the increased color in the egg yolk and the time factors involved in the gain and loss of color of the Egg yolk.

Journal ArticleDOI
TL;DR: The results of an experiment were reported to determine which part of the oat carries the cannibalism preventing property and in addition, to determine whether manganese and wood fiber would prevent cannibalism.

Journal ArticleDOI
TL;DR: In the first experiment, the source of the pigments were kept constant while the amount in the rations varied, in the second experiment the amount of pigments in the ration was kept constant, and in the third experiment the source and source were kept different as mentioned in this paper.

Journal ArticleDOI
TL;DR: The recent nutritional literature contains a number of reports which show that vitamin G, as originally postulated, contains more than one factor which is required by the chick.

Journal ArticleDOI
TL;DR: Preliminary indications of the existence of a dietary disease in which chickens suffer from hemorrhagic tendencies and delayed blood clotting may be seen in a number of papers describing results obtained in experiments dealing with various phases of poultry nutrition.