Thyroid hormone modulation of ovarian recrudescence of air-breathing catfish Clarias gariepinus

Supriya, A. ; Raghuveer, K. ; Swapna, I. ; Rasheeda, M. K. ; Kobayashi, T. ; Nagahama, Y. ; Gupta, Aparna Dutta ; Majumdar, K. C. ; Senthilkumaran, B. (2005) Thyroid hormone modulation of ovarian recrudescence of air-breathing catfish Clarias gariepinus Fish Physiology and Biochemistry, 31 (2-3). pp. 267-270. ISSN 0920-1742

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Official URL: http://www.springerlink.com/content/6007q422372718...

Related URL: http://dx.doi.org/10.1007/s10695-006-0034-1

Abstract

In the present study, thiourea-induced thyroid hormone depletion and thyroxine (T4) 'overdose' were used as a strategy to understand the influence of thyroid hormones on ovarian recrudescence of juvenile (3-months-old), immature (8-months-old) and adult (1-year-old) air-breathing catfish, Clarias gariepinus. Thiourea-induced thyroid hormone depletion in juvenile catfish impaired ovarian development, but no significant effect was observed in immature catfish and during late stage of ovarian recrudescence of mature catfish. T4 treatment in females undergoing late stages of ovarian recrudescence induced rapid oocyte growth by promoting its early entry into maturational phase as evident from the presence of more number of vitellogenic and post-vitellogenic follicles, decrease in aromatse immunoreactivity and reduced estradiol-17β levels. Hence, thyroid hormones have an important role to play during early stages of ovarian development and vitellogenesis of catfish and also indicating that thyroid has a stage dependent effect on ovary.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Aromatase; Estradiol-17β Ovary; Thyroxine; Thiourea
ID Code:60345
Deposited On:08 Sep 2011 14:40
Last Modified:08 Sep 2011 14:40

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