The effect of pimozide/LHRHa and 17α-hydroxyprogesterone on plasma steroid levels and ovulation in the African catfish, Clarias gariepinus
Publication date
1987-06-01
Authors
Richter, C.J.J.
Eding, E.H.
Goos, H.J.Th.
Leeuw, R. de
Scott, A.P.
Oordt, P.G.W.J. van
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Article
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Abstract
The effect was studied of a preovulatory gonadotropic hormone (GTH) surge, induced by pimozide/LHRHa treatment, and of 17α-hydroxyprogesterone on oocyte maturation and ovulation and on the plasma levels of 17α-hydroxyprogesterone, 17α-hydroxy-20β-dihydroprogesterone, testosterone and estradiol. GTH and 17α-hydroxyprogesterone initially caused an increase in plasma testosterone levels, followed by an increase in 17α-hydroxy-20β-dihydroprogesterone. Neither treatment affected estradiol levels. All fish treated with pimozide/LHRHa or 17α-hydroxyprogesterone showed oocyte maturation and ovulation.