Zobrazeno 1 - 4
of 4
pro vyhledávání: '"D F, Gudermuth"'
Publikováno v:
Canadian Journal of Zoology. 74:8-14
Five parameters of reproductive biology (number of live calves, rates of tending lactating and nonlactating cows, and age-specific calving and pregnancy rates) were measured for the Mary Mountain (≈2500) and Northern Range (≈600) herds of bison (
Publikováno v:
Theriogenology. 50(2)
Estradiol (E2), testosterone (T) and progesterone (P4) concentrations were determined by enzyme-immunoassay in aqueous extracts of fecal samples obtained during anestrus, proestrus, estrus and metestrus of 11 nonpregnant and 11 pregnant bitches. Feca
Publikováno v:
Journal of reproduction and fertility. Supplement. 51
Cats are considered to be reflex ovulators that exhibit a luteal phase (pregnancy or pseudopregnancy) only after copulatory stimulation. In a group-housed colony of 15 1-year-old domestic queens, 23 noncopulatory, spontaneous ovulations were observed
Publikováno v:
The Journal of Wildlife Management. 57:407
The physiological mechanisms that control reproductive success of wild bison (Bison bison) are not known, and the relatively small scattered herds prevent intensive study. Environmental, demographic, and physiological factors all play major interrela