Antler casting in relation to parturition in semi-domesticated female reindeer
نویسندگان
چکیده
منابع مشابه
Reproduction in female reindeer.
Reindeer are either wild or kept under very extensive farming systems. They are seasonal breeders, with mating coinciding with the decreasing photoperiod in the autumn, and with calving in the spring. Little is known regarding the factors that influence reproduction in reindeer or of their reproductive physiology. Studies carried out to date have mainly focused on issues related to the populati...
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15 صفحه اولSeasonal levels of reproductive hormones and their relationship to the antler cycle of male and female reindeer (Rangifer tarandus).
Seasonal levels of LH, FSH, testosterone (T), estradiol, progesterone (P), and prolactin (PRL) were determined in the plasma of five adult bulls, and five barren and four pregnant cows of Alaskan reindeer (Rangifer tarandus), which were sampled every 3 weeks for 54 weeks. The male reproductive axis was sequentially activated; LH peaked in May-June (2 ng/ml), FSH in June (51 ng/ml), and T in Sep...
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ژورنال
عنوان ژورنال: Rangifer
سال: 2013
ISSN: 1890-6729
DOI: 10.7557/2.33.1.2722