1 research outputs found
Performances de reproduction du poisson chat endogÚne du Cameroun Clarias jaensis (Boulenger, 1909) en milieu contrÎlé
Les performances de reproduction de Clarias jaensis ont Ă©tĂ© Ă©valuĂ©es entre mai et octobre 2014 Ă Â BatiĂ© (Ouest-Cameroun). A cet effet, 30 femelles de poids moyen 199, 52 ± 34,85 g ont Ă©tĂ© rĂ©parties en 5 lots comparables. Chaque lot choisi au hasard a Ă©tĂ© soumis Ă lâHormone Chorionique Gonadotrophine (HCG) aux doses de 3500, 4000 et 4500 UnitĂ©s Internationales (UI) / kg et aux extraits hypophysaires des mĂąles et des femelles. Le poids et le diamĂštre des ovocytes, les taux de fĂ©condation et dâĂ©closion ont Ă©tĂ© Ă©valuĂ©s. Les principaux rĂ©sultats ont montrĂ© que: le poids des ovocytes a Ă©tĂ© le plus Ă©levĂ© (p < 0, 05) avec lâextrait hypophysaire femelle (39,33±17,08g) ; le diamĂštre des ovocytes a Ă©tĂ© comparable entre les traitements. Le taux de fĂ©condation a Ă©tĂ© le plus Ă©levĂ© pour la dose de 4000 UI / kg de HCG (87, 50 ± 12,45%) suivi de lâextrait hypophysaire femelle (85,08 ± 14,29%). Cependant aucune diffĂ©rence significative (p Ë 0,05) nâa Ă©tĂ© obtenue. Le taux dâĂ©closion a Ă©tĂ© plus Ă©levĂ© avec lâextrait hypophysaire femelle (19, 38 ± 6,58%). La reproduction artificielle chez Clarias jaensis est possible avec lâhormone HCG Ă 4000 UI / kg ou des extraits hypophysaires femelles.© 2016 International Formulae Group. All rights reserved.Mots clĂ©s: Clarias jaensis, espĂšce endogĂšne, performances de reproduction, captivitĂ©, CamerounEnglish Title:  Reproductive performances of indigenous catfish of Cameroon Clarias jaensis (Boulenger, 1909) in captivityEnglish AbstractIn order to improve local biodiversity and number of fishes in aquaculture in Cameroon, reproductive performances in captivity of Clarias jaensis have been studied between Mai and October 2014 in BatiĂ© (West Cameroon). In fact, 30 females with 199, 52 ± 34, 85 g were divided randomly into five comparable treatments. Each was submitted to a Human Chorionic Gonatropin Hormon at 3500, 4000 and 4500 Internationals Units (UI) / kg of body weight, males and femaleâs pituitary extracts. The main results obtained were: The oocyte weight was significantly higher (p < 0, 05) with femalesâ pituitary extracts (39, 33 ± 17,08g), the oocyte diameter mean was comparable within the treatments. The higher fecundity rate was obtained with the Human Chorionic Gonadotropin Hormon at 4000 UI / kg of body weight (85, 08 ± 14, 29%). However, no significant differences (p Ë 0, 05) were found. The hatching rate was significantly higher (p < 0, 05) with the pituitary extracts of females (19, 38 ± 6, 58%). Clarias jaensis can be reproduced artificially using Human Chorionic Gonadotropin Hormon at 4000 UI / kg of body weight or femaleâs pituitary extracts.© 2016 International Formulae Group. All rights reserved.Keywords: Clarias jaensis, reproductive performances, indigenous species, captivity, Cameroo