منابع مشابه
Nutrition in the reproduction of farm animals.
There is still uncertainty about the earliest stage of development at which nutrition influences an animal's subsequent ability to achieve its genetic potential for reproduction. Prenatal growth retardation caused by feeding ewes on a ration as low as 0.5 times maintenance during early pregnancy had no subsequent detrimental effect on either the natural or gonadotrophin-stimulated ovulation rat...
متن کاملOptimization of Reproduction in Dairy Animals
Reproductive performance is one of the important factors for determining the economics of livestock production. Factors leading to sub fertility or infertility can broadly be classified as hereditary, physiological, nutritional, manage mental, environmental, pathological, psychological, immunological incompatibility and immune-deficiency syndromes. Keeping these factors in mind, a multifaceted ...
متن کاملMicronutrients and reproduction in farm animals.
Reproductive well-being and performance of farm animals is largely dependent on their nutritional status, which is often less than optimum in developing tropical countries. More often than not, they are malnourished, particularly with regards to micronutrients. Evidence was presented to show that because these micronutrients are involved in such functions as intracellular detoxification of free...
متن کاملSeason controlled reproduction of undomesticated animals.
The following article is a summary of research on the influence of season on the reproductive processes in undomesticated animals. The results presented below show: a/ an annual hormonal profile of domestic pig and wild boar crossbreed and the antioxidant blood system in the different seasons, b/ the possibility of gonadptropic hormone stimulation in chinchillas which are in diestrus or inferti...
متن کاملEffects of xenobiotics and phytotoxins on reproduction in food animals.
As man-made chemicals (anthropogenic) are increasing in number and amount of use, it is not uncommon for farmers, ranchers, consultants, or veterinarians to suspect a xenobiotic (strange or foreign substance) as the cause of reproductive failures. In this article, the authors discuss toxicants that have been shown to affect reproduction, with emphasis on food-producing animals and fowl. The dis...
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ژورنال
عنوان ژورنال: Nature
سال: 1961
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1901045b0