Abstract:
:Sex steroid levels in the plasma of the female Pleurodeles waltl were determined by radioimmunoassay of blood samples taken monthly from each newt during an 18-month period. Estradiol-17 beta levels were relatively high (greater than 1 ng/ml) but androgen levels were higher (2-30 ng/ml). Androgen and estradiol-17 beta levels fluctuated according to season with two annual peaks, in autumn and in March. Testosterone was the principal androgen present in this plasma. Dihydrotestosterone levels were relatively low but showed slight fluctuations during the year. 4-Androstenedione and estrone levels were very low and relatively constant throughout the seasons. Fluctuations of androgen and estradiol-17 beta levels were synchronous between the several newts studied during the year. The ratio [E2-17 beta]/[Androgen] was stable during the major part of the year (0.2-0.3) except in July and August, when it reached the value of 1.0. The seasonal variations in the steroid levels were well correlated to the morphological modifications of sexual characteristics during the year.
journal_name
Gen Comp Endocrinoljournal_title
General and comparative endocrinologyauthors
Garnier DHdoi
10.1016/0016-6480(85)90075-9subject
Has Abstractpub_date
1985-12-01 00:00:00pages
414-8issue
3eissn
0016-6480issn
1095-6840journal_volume
60pub_type
杂志文章abstract::Development patterns in birds range from precocial species, which hatch chicks largely capable of independent existence, to altricial species, chicks of which are highly dependent on their parents for extended periods. Previous work indicates precocial chicks have a robust corticosterone response from hatching whereas...
journal_title:General and comparative endocrinology
pub_type: 杂志文章
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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更新日期:2010-10-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1006/gcen.1998.7150
更新日期:1998-10-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1006/gcen.1996.0083
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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更新日期:1991-05-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1006/gcen.2001.7608
更新日期:2001-04-01 00:00:00
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journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
pub_type: 杂志文章,评审
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更新日期:2002-03-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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更新日期:1983-09-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1006/gcen.1995.1046
更新日期:1995-04-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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更新日期:1992-02-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1006/gcen.1999.7395
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1016/j.ygcen.2004.08.003
更新日期:2004-11-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1006/gcen.2001.7728
更新日期:2001-12-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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更新日期:2009-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:2002-04-01 00:00:00
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journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
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更新日期:2016-03-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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更新日期:2014-09-15 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
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更新日期:1986-09-01 00:00:00
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journal_title:General and comparative endocrinology
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1016/0016-6480(86)90167-x
更新日期:1986-08-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1016/0016-6480(90)90301-2
更新日期:1990-02-01 00:00:00
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journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1016/0016-6480(90)90098-7
更新日期:1990-07-01 00:00:00
abstract::Flatfishes with more body height after metamorphosis should be better adapted to a benthic lifestyle. In this study, we quantified the changes in body height during metamorphosis in two flatfish species, Paralichthys olivaceus and Platichthys stellatus. The specific pattern of cell proliferation along the dorsal and v...
journal_title:General and comparative endocrinology
pub_type: 杂志文章
doi:10.1016/j.ygcen.2016.06.028
更新日期:2016-09-15 00:00:00