Endocrine correlates of hibernation-independent gonadal recrudescence and the limited late-winter breeding season in woodchucks, Marmota monax.
Endocrine correlates of hibernation-independent gonadal recrudescence and the limited late-winter breeding season in woodchucks, Marmota monax.
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土拨鼠冬眠独立的性腺复发和有限的冬末繁殖季节的内分泌相关性。
DOI:
10.1002/jez.1402560444
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发表时间:
1990
期刊:
影响因子:
--
通讯作者:
Tennant,B
中科院分区:
文献类型:
--
作者:
Concannon,PW;Baldwin,B;Roberts,P;Tennant,B
Woodchucks (Marmota monax) normally experience gonadal recrudescence towards the end of a 4–5 month hibernation, emerge in late winter, immediately breed in a short 3‐week breeding season, and have regressed gonads before the next hibernation. Our studies of wild and captive animals show that fertile females give birth to single litters after a 32‐day gestation and their breeding season is terminated by a reactivation of the corpora lutea of pregnancy for 1–3 months immediately postpartum. In nonbred females the breeding season is likewise terminated by spontaneous luteinization of the ovaries for 1–3 months shortly after the vernal equinox. Testes regress and testosterone declines during and after the breeding season. Circannual reproductive cycles persist in the absence of hibernation and are shortened to 9–10 months after 3–5 years of a 12L:12D photoperiod. Unique aspects of this species that merit endocrine investigation include annual descent/retraction of testes, transient luteolysis at parturition, superactivatior of postpartum corpora lutea, regulation of the pituitary‐gonadal axis by an annual endogenous metabolic cycle entrained to the annual change in photoperiod, and the hormonal basis of hibernation.
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影响因子:
1.7
作者:
M. W. Fall
通讯作者:
M. W. Fall
影响因子:
1.7
作者:
J. J. Christian;E. Steinberger;T. Mckinney
通讯作者:
T. Mckinney
DOI:
10.5962/p.226728
发表时间:
1934
期刊:
Annals of the Carnegie Museum
影响因子:
--
作者:
W. Hamilton
通讯作者:
W. Hamilton
DOI:
10.1086/physzool.40.4.30158457
发表时间:
1967
期刊:
Physiological Zoology
影响因子:
--
作者:
D. E. Davis
通讯作者:
D. E. Davis
影响因子:
4.8
作者:
R. Snyder;J. J. Christian
通讯作者:
J. J. Christian