Influence of Photoperiod and Ovaries on Seasonal Reproductive Activity in Mares
نویسندگان
چکیده
منابع مشابه
critical period effects in foreign language learning:the influence of maturational state on the acquisition of reading,writing, and grammar in english as a foreign language
since the 1960s the age effects on learning both first and second language have been explored by many linguists and applied linguists (e.g lennerberg, 1967; schachter, 1996; long, 1990) and the existence of critical period for language acquisition was found to be a common ground of all these studies. in spite of some common findings, some issues about the impacts of age on acquiring a second or...
15 صفحه اولInfluence of season and age on reproductive activity in pony mares on the basis of a slaughterhouse survey.
Reproductive tracts were collected monthly over a 3-year period from 1,003 nonpregnant ponies at a slaughtering plant in Wisconsin. Ages of the animals were estimated from tooth replacement and wear. Ovaries were examined for follicular and luteal activity. There were no differences between left and right ovaries in size or occurrence of ovulation. The frequency of multiple ovulations, 10%, was...
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Effects of photoperiod on daily locomotor activity, energy expenditure, and feeding behavior in a seasonal mammal.
The objective of this study was to determine whether the previously observed effects of photoperiod on body weight in Siberian hamsters were due to changes in the daily patterns of locomotor activity, energy expenditure, and/or feeding behavior. Adult males were monitored through a seasonal cycle using an automated comprehensive laboratory animal monitoring system (CLAMS). Exposure to a short-d...
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ژورنال
عنوان ژورنال: Biology of Reproduction
سال: 1979
ISSN: 0006-3363,1529-7268
DOI: 10.1095/biolreprod20.3.567