[Pattern of plasma sex steroid hormone levels during the breeding season of male and female skink: Eumeces chinensis]

[Pattern of plasma sex steroid hormone levels during the breeding season of male and female skink: Eumeces chinensis] Research Abstract Details 

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[Pattern of plasma sex steroid hormone levels during the breeding season of male and female skink: Eumeces chinensis] Abstract Text:

Jian Rao Hu,Ji Zeng Du,Xiang Ji,

Changes in gonadal activity and plasma sex steroid hormone levels in male and female Eumece chinensis during the breeding season were described. The results showed that: The vitellogensis of follicles of female Eumeces chinensis needed the stimulation of 17beta-estradiol (E2). As ovary masses reached peak values between late April and mid-May, E2 levels rose to the top value by late March, and then sharply declined but went up again before preovulation; The physiological functions of plasma progesterone (P) consisted in its oviductal egg retention, embryo development, and eggshell formation. P levels fluctuated near the basic value between mid-March and late April. In mid-May, with the onset of ovulation, plasma P levels rose rapidly, reached peak value by late May and declined sharply after ovulation. Plasma E2 levels declined as plasma P levels rose, showing an inverse relationship between them; In males, plasma Testosterone (T) levels were closely correlated with the maintenance of spermatogenesis activities, male and male combat, sexual display, and mating. Plasma T levels tended to rise after the termination of hibernation, and reached peak value by mid-April. After mid-May, with the testis aggressing, plasma T levels gradually went down and reached bottom value by late June.

[Pattern of plasma sex steroid hormone levels during the breeding season of male and female skink: Eumeces chinensis] Publishing Authors By Initials

JR Hu,JZ Du,X Ji,

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[Pattern of plasma sex steroid hormone levels during the breeding season of male and female skink: Eumeces chinensis] Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Shi yan sheng wu xue bao

VOLUME: 37

Page Numbers: 443-8

Journal Abbreviation: Shi Yan Sheng Wu Xue Bao

ISSN: 0001-5334

DAY: 25

MONTH: Dec

YEAR: 2004

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LANGUAGE: chi

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AFFILIATION: College of Life Sciences, Zhejiang University, Hangzhou 310027. hujianrao@hotmail.com

Country: China

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MEDLINETA: Shi Yan Sheng Wu Xue Bao

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