Journal article
In vitro ovarian estradiol-17β and testosterone responses to pituitary extract and corresponding serum levels during the prespawning to vitellogenic phases of the reproductive cycle in winter flounder ( Pseudopleuronectes americanus)
Comparative biochemistry and physiology. A, Comparative physiology, Vol.101(1), pp.69-75
1992
Handle:
https://hdl.handle.net/2376/108314
Abstract
1.
1. Seasonal serum levels of estradiol-17β (E
2) and testosterone (T) indicated prespawning maximums and postspawning minimums in female winter flounder.
2.
2.
In vitro production of E
2 by the ovary was only stimulated by homologous pituitary extract (PE) during the vitellogenic period.
3.
3.
In vitro production of T by the ovary in response to PE is high at least one month prior to and increases up to spawning, suggesting a role for T during the final maturation process in winter flounder.
4.
4. High serum levels of E
2 during the prespawning period (April) represent biologically active steroid, for although serum E
2 binding protein (BP) activity is substantial (79%) it is no different from BP activity during the vitellogenic phase (October).
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Details
- Title
- In vitro ovarian estradiol-17β and testosterone responses to pituitary extract and corresponding serum levels during the prespawning to vitellogenic phases of the reproductive cycle in winter flounder ( Pseudopleuronectes americanus)
- Creators
- James J NaglerDavid R Idler
- Publication Details
- Comparative biochemistry and physiology. A, Comparative physiology, Vol.101(1), pp.69-75
- Academic Unit
- UNKNOWN
- Publisher
- Elsevier B.V
- Identifiers
- 99900546951401842
- Language
- English
- Resource Type
- Journal article