منابع مشابه
Effect of nutrition on androgenic activity and spermatogenesis in mammals.
To define the nutrient requirements essential to the male organism for its normal reproductive function is by no means a simple matter. It is a problem of many aspects because the processes involved are subject to fluctuations even within a single species, according to climate, environmental conditions, food habits, and the age of sexual maturation. A further complication arises from the effect...
متن کاملEffect of nutrition on androgenic activity and spermatogenesis in mammals
To define the nutrient requirements essential to the male organism for its normal reproductive function is by no means a simple matter. It is a problem of many aspects because the processes involved are subject to fluctuations even within a single species, according to climate, environmental conditions, food habits, and the age of sexual maturation. A further complication arises from the effect...
متن کاملSmall mammals as hosts of immature ixodid ticks.
Two hundred and twenty-five small mammals belonging to 16 species were examined for ticks in Free State, Mpumalanga and Limpopo Provinces, South Africa, and 18 ixodid tick species, of which two could only be identified to genus level, were recovered. Scrub hares, Lepus saxatilis, and Cape hares, Lepus capensis, harboured the largest number of tick species. In Free State Province Namaqua rock mi...
متن کاملAn Overview of Sex Selection at Conception in Mammals
Although the mechanisms under which sex ratio is controlled in nature remain unknown, researchers have attempted to treat sperm in an effort to predetermine the sex of the offspring. The methods of sperm separation that have been repeatedly reported to isolate fractions rich in X- or Y-chromosome bearing sperm are serum albumin gradient swim-up and flow cytometry. However, the ability of the se...
متن کاملSpermatogenesis in the turkey (Meleagris gallopavo): quantitative approach in immature and adult males subjected to various photoperiods.
The objectives of this study were to identify and quantitate the germ cell populations of the testes in sexually mature male turkeys (Trial 1), determine the duration of meiosis based on BrdU labeling and stereological analyses (Trial 2), and examine the impact of various photoperiods on germinal and somatic cell populations in immature and adult males (Trial 3). In Trial 1, both testes within ...
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ژورنال
عنوان ژورنال: Reproductive Medicine and Biology
سال: 2007
ISSN: 1445-5781
DOI: 10.1111/j.1447-0578.2007.00177.x