Stimulation of spermiation and induction of ovulation in pike (Esox lucius)
| Autor: | Roland Billard, Jacqueline Marcel |
|---|---|
| Přispěvatelé: | UR 0544 JOUY GENETIQUE DES POISSONS Unité de recherche Génétique des Poissons, Institut National de la Recherche Agronomique (INRA), Laboratoire de physiologie des poissons |
| Jazyk: | angličtina |
| Rok vydání: | 1980 |
| Předmět: |
medicine.medical_specialty
media_common.quotation_subject medicine.medical_treatment [SDV]Life Sciences [q-bio] Intraperitoneal injection esocidae Stimulation northern pike Aquatic Science Biology gonadotropine reproduction 03 medical and health sciences poisson esox lucius Internal medicine medicine gonadotropin Carp Ovulation hormonal treatment Esox 030304 developmental biology media_common spermatogénèse fish 0303 health sciences 04 agricultural and veterinary sciences Oocyte biology.organism_classification Sperm brocheton medicine.anatomical_structure Endocrinology ovulation 040102 fisheries 0401 agriculture forestry and fisheries spermiation Hormone |
| Zdroj: | Aquaculture Aquaculture, Elsevier, 1980, 21 (2), pp.181-195. ⟨10.1016/0044-8486(80)90027-7⟩ Aquaculture 2 (21), 181-195. (1980) |
| ISSN: | 0044-8486 |
| DOI: | 10.1016/0044-8486(80)90027-7⟩ |
| Popis: | Mature northern pike were given various hormonal treatments in March or April in order to stimulate spermiation or to induce ovulation. In males the total amount of sperm collected after treatment increased, in comparison with saline-injected males, by 3–11 times with partially purified salmon gonadotropin (PPSG-activity: half of the highly purified s-GTH; injected at doses of between 5 and 100 μg/kg body weight); 3–6 times with crude carp pituitary extract (0.5–3 mg/kg body weight); and 3–7 times with fresh pike pituitaries (14 and 1.2 mg wet weight/kg body weight). The sperm obtained after hormonal treatment was of good quality. Intracardiac injection of superactive LRH analogue had no effect. In females, PPSG induced 90 and 100% ovulation at the doses of 50 and 25 μg/kg body weight. Dried salmon pituitaries (2.5 mg/kg, equivalent to 50 μg of PPSG) gave 25% ovulation; at 10 mg/kg, 25% complete ovulation was again recorded, but in addition 70% of the females showed oocyte maturation and partial ovulation. Similarly, dried carp pituitary (3 mg/kg) induced only oocyte maturation but no ovulation. The oocytes obtained after hormonal treatment were in general fertile. Intraperitoneal injection of LRH in an emulsified form induced neither oocyte maturation nor ovulation. The lack of effect of LRH analogue is discussed and shows that the use of this compound as a substitute for pituitary preparation is not very promising. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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