%0 Conference Proceedings
%9 ACTI : Communications avec actes dans un congrès international
%A Kristanto, A.H.
%A Subagja, J.
%A Slembrouck, Jacques
%A Legendre, Marc
%T Effect of eggs incubation technique on hatching rate, hatching kinetic and survival of larvae in the Asian catfish Pangasius hypophthalmus (Siluriformes, Pangasiidae)
%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:010020350
%G ENG
%I IRD ; Can Tho University
%K POISSON D'EAU DOUCE ; PISCICULTURE ; METHODE D'ELEVAGE ; OEUF ; TEMPERATURE ; ECLOSION ; LARVE ; TAUX DE SURVIE ; APPAREILLAGE ; ETUDE COMPARATIVE ; ETUDE EXPERIMENTALE
%K INCUBATION
%P 107-111
%U https://www.documentation.ird.fr/hor/fdi:010020350
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/doc34-08/010020350.pdf
%W Horizon (IRD)
%X The influence of an incubation system on embryo development and subsequent survival of larvae was evaluated on eggs from two #P. hypophthalmus$ females. All tests were performed at a same temperature of 28.5-29°C, given by the water of a re-circulating system to which all incubation devices were connected. The following situations were tested : 1) Happa (adhesive eggs) ; 2) floating screen net (adhesive eggs) ; 3) McDonald type incubator (stickiness of eggs being suppressed with a clay suspension) ; 4) plastic basket with water from the re-circulating system (stickiness of eggs being suppressed with a clay suspension) ; 5) plastic basket with water from the re-circulating system (adhesive eggs) ; 6) plastic basket with mineral water (adhesive eggs). No significant difference was found in hatching rates whatever the conditions of egg incubation. The development time and hatching kinetic were very similar in all systems ; at 28.5-29.5°C, the first hatched larvae were observed between 19 and 21h post-fertilisation and the duration of the hatching period lasted 6 to 8 h. However, hatching tended to occur slightly earlier in the McDonald type incubator, probably as a consequence of mechanical agitation of eggs. Up to the age of 4 days, no significant difference was found in the survival of larvae as a function of the type of incubator from which they were issued. All together, the results indicate that, when properly managed, the incubation methods can hardly be responsible for the variability of hatching rates or survival of larvae often observed in different reproduction trials or from farm to farm. (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