Artificial photoperiod: it’s influence on mare’s autumn transition period and seasonal anestrus
نویسندگان
چکیده
منابع مشابه
Investigation of the effect of progesterone (Cue-MateTM) administration on ovulation induction in photostimulated anestrus mares
BACKGROUND: In mare, different methods of earlier cyclicity induction and hastening first ovulation of the year have been reported. OBJECTIVES: The goal of present study was to investigate the effect of progesterone (Cue-mate®) on synchronization and acceleration the first ovulation of the year in winter anestrous mares under artificial lighting system. METHODS: After detection of anestrus mare...
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The physiologic breeding season of horses extends from April to October in the Northern Hemisphere. Mares are polyestrous in that they exhibit repeated estrous cycles during the breeding season. In the winter months, 80% or more of mares enter a prolonged anovulatory phase referred to as winter anestrus. The onset of the transition period may be defined as the first significant increase in foll...
متن کاملArtificial insemination and embryo transfer in mares.
Mares can be artificially inseminated with chilled or frozen semen to increase the revenue from their offspring. Embryo transfer can be used to produce more than one foal from a single mare per season. Recent advances in using equine follicle-stimulating hormone to induce superovulation in mares have stimulated research on preserving equine embryos. Equine embryos are usually collected on day 7...
متن کاملSeasonal effects on ovarian follicular development in pony mares.
To define ovarian follicular kinetics in the equine ovary during anestrus and the breeding season, the follicular population of pony mares was investigated at mid-anestrus and at the beginning and end of the breeding season. There was a clear effect of season on the exit of reserve (primordial and initiated) follicles since at the beginning of the breeding season we noticed a higher mitotic ind...
متن کاملPhotoperiod and heat stress influence on lactating sow performance and photoperiod effects on nursery pig performance.
Three experiments were conducted to evaluate sow and piglet productivity under extended photoperiod. In Exp. 1, 98 crossbred, lactating sows were housed in one of four treatments: thermoneutral air temperature (23.6 degrees C) in either (h of light:dark) 1:23 or 16:8 photoperiods, or heat stress (30.4 degrees C) in either 1:23 or 16:8 photoperiods. Heat stress reduced (P less than .05) sow feed...
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ژورنال
عنوان ژورنال: Pferdeheilkunde Equine Medicine
سال: 2011
ISSN: 0177-7726
DOI: 10.21836/pem20110312