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A new tool for induced spawning : the use of 17alpha-hydroxy-20beta-dihydroprogesterone to spawn carp at low temperature Animal Physiology
Jalabert, B.; Breton, B.; Brzuska, E.; Fostier, A.; Wieniawski, J..
The efficiency of different hormonal treatments to induce ovulation of carp at low temperatures (13-15°C) was tested. "Priming" with a low dose (0.6 mg/kg) of carp pituitary extract was found necessary for a subsequent successful treatment with 17alpha-hydroxy-20beta-dihydroprogesterone (17alpha-20beta P) (2 mg/kg) 1 day later. The eggs produced by this method showed satisfactory fertilization (75-96%) and hatching success (70%). On the other hand, normal hypophysation (5.4 mg/kg) following priming resulted only in partial ovulation and oocyte resorption at this temperature. Priming was shown to increase the gonadotropin level in plasma from about 2 to 35 ng/ml and to induce germinal vesicle migration toward the periphery of oocytes. Neither...
Tipo: Journal (Paginated) Palavras-chave: QP Physiology.
Ano: 1977 URL: http://phy043.tours.inra.fr:8080/archive/00000195/
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