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The application of GnRHa implants in male Atlantic halibut; effects on steroids, milt hydration, sperm motility and fertility
Vermeirssen, E.L.M.; Mazorra de Quero, C.; Shields, R.; Norberg, B.; Scott, A.P.; Kime, D.E. (2000). The application of GnRHa implants in male Atlantic halibut; effects on steroids, milt hydration, sperm motility and fertility, in: Norberg, B. et al. (Ed.) Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. pp. 399-401
In: Norberg, B. et al. (Ed.) (2000). Proceedings of the 6th International Symposium on the Reproductive Physiology of Fish, Bergen, Norway, July 4-9, 1999. Department of Fisheries and Marine Biology, University of Bergen: Bergen. ISBN 82-7461-048-2. 499 pp., more
In: International Symposium on the Reproductive Physiology of Fish. Museo Nacional de Ciencias Naturales, more

Available in Authors 
    VLIZ: Proceedings [4325]

Keyword
    Marine

Authors  Top 
  • Vermeirssen, E.L.M.
  • Mazorra de Quero, C.
  • Shields, R.
  • Norberg, B.
  • Scott, A.P.
  • Kime, D.E.

Abstract
    In several trials male halibut were implanted with slow-release gonadotrophin-releasing hormone analogue (GnRHa) pellets. Data show that GnRHa caused a sustained stimulation of hydration of the milt. This coincided with a rise in metabolites of 17,20 beta -dihydroxy-4-pregnen-3-one (17,20 beta -P). The most abundant metabolite was 3 beta ,17,20 beta -trihydroxy-5 beta -pregnane 20-sulphate (3 beta ,17,20 beta -P-5 beta -S). GnRHa had a positive effect on sperm motility, especially towards the end of the season. However, it did not significantly affect sperm fertility.

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