%0 Conference Proceedings
%9 ACTI : Communications avec actes dans un congrès international
%A Legendre, Marc
%A Subagja, J.
%A Slembrouck, Jacques
%T Absence of marked seasonal variations in sexual maturity of Pangasius hypophthalmus brooders held in ponds at the Sukamandi station (Java, Indonesia)
%S The biological diversity and aquaculture of clariid and Pangasiid catfishes in South-East Asia : proceedings of the mid-term workshop of the "Catfish Asia project"
%C Jakarta (IDN) ; Can Tho
%D 1998
%E Legendre, Marc
%E Pariselle, Antoine
%L fdi:010020348
%G ENG
%I IRD ; Can Tho University
%K POISSON D'EAU DOUCE ; CYCLE DE REPRODUCTION ; HORMONE ; INDUCTION ; TEMPERATURE ; VARIATION SAISONNIERE ; PISCICULTURE ; METHODE D'ELEVAGE ; ETUDE EXPERIMENTALE
%K INDONESIE ; JAWA
%K SUKAMANDI STATION
%P 91-96
%U https://www.documentation.ird.fr/hor/fdi:010020348
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/doc34-08/010020348.pdf
%W Horizon (IRD)
%X An evaluation of the seasonal variations of sexual activity of #P. hypophthalmus$ broodstock held in 50 m2 ponds was carried out between April 1997 and April 1998 at the Sukamandi station (West Java, 6°S of latitude). These variations were assessed through the evolution of oocyte diameter of individual females, the proportion of fluent males and the success of hormonal-induced breeding trials. High proportions of fluent males and mature females with post-vitellogenic oocytes of modal diameter superior to 1.00 mm were found at anytime. As a consequence, successful induced breeding of this species using hormonal treatments could be performed regardless of season and allowed an all year long production of fry. This continuous sexual maturity of #P. hypophthalmus$ broodstock, during both the dry and rainy seasons, may have resulted to a large extent from rather stable conditions, with a monthly mean water temperature constantly high (28-31°C) and a low variation of day length during the year. Ovulation was successfully induced at 3, 2 and 4 months interval in a same #P. hypophthalmus$ female. This indicated a quick recovery of oogenesis in females reared in the ponds. (Résumé d'auteur)
%B Characterisation, Utilisation and Maintenance of Biological Diversity for the Diversification and Sustainability of Catfish Culture in South East Asia
%8 1998/05/11-15
%$ 040AQUAC