Subagja J., Slembrouck Jacques, Hung L.T., Legendre Marc. (1998). Analysis of precocious mortality of Pangasius hypophthalmus larvae (Siluriformes, Pangasiidae) during the larval rearing and propostion of appropriate treatments. In :
Legendre Marc (ed.), Pariselle Antoine (ed.). 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". Jakarta (IDN) ; Can Tho : IRD ; Can Tho University, p. 147-155. Characterisation, Utilisation and Maintenance of Biological Diversity for the Diversification and Sustainability of Catfish Culture in South East Asia, Can Tho (VNM), 1998/05/11-15.
Titre du document
Analysis of precocious mortality of Pangasius hypophthalmus larvae (Siluriformes, Pangasiidae) during the larval rearing and propostion of appropriate treatments
Année de publication
1998
Type de document
Colloque
Auteurs
Subagja J., Slembrouck Jacques, Hung L.T., Legendre Marc
In
Legendre Marc (ed.), Pariselle Antoine (ed.), 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"
Source
Jakarta (IDN) ; Can Tho : IRD ; Can Tho University, 1998,
p. 147-155
Colloque
Characterisation, Utilisation and Maintenance of Biological Diversity for the Diversification and Sustainability of Catfish Culture in South East Asia, Can Tho (VNM), 1998/05/11-15
Both in Indonesia and Vietnam, larval rearing of Pangasius hypophthalmus remains problematic due to variable and generally low survival rates obtained. The first week represents the most critical period for these larvae and up to now the cannibalistic behaviour was considered as the main cause of mortality. In the present study, two experiments were carried out in order to better understand the evolution and causes of mortality of P. hypophthalmus larvae from hatching up to 8 days of age and find out measures to improve survival rates. The first experiment was designed to evaluate the importance of cannibalism and differences in mortality when larvae from two different females were reared either in groups of 30 individuals or in isolated conditions (30 larvae reared separately). In both cases, the culture was carried out either with or without antibiotic. The aim of the second experiment was to test Oxytetracycline and different disinfectants (Chloramine-T, formalin and "formalin + Malachite Green Oxalate") at different dosges to prevent bacterial outbreaks in the culture. The results indicated that the survival rates of P. hypophthalmus larvae was dependant on the initial quality of larvae or eggs and that larval mortality was more a consequence of pathogenic infection than a direct effect of cannibalism. The present study demonstrated that the survival rates of larvae were systematically improved when rearing as carried out in water containing antibiotic (Oxytetracycline at a dose of 5 to 20 mg/L). Survival rates and final mean body weights of larvae as high as those obtained using antibiotic were also reached with applications of disinfectants such as Chloramine-T and formalin. The use of these disinfectants is recommended for an application in commercial P. hypophthalmus hatcheries. (Résumé d'auteur)
Plan de classement
Aquaculture [040AQUAC]
Descripteurs
POISSON D'EAU DOUCE ; PISCICULTURE ; LARVE ; MORTALITE ; TAUX DE SURVIE ; AGENT PATHOGENE ; BACTERIE ; CANNIBALISME ; METHODE DE LUTTE ; ANTIBIOTIQUE ; ETUDE EXPERIMENTALE ; OXYTETRACYCLINE
Description Géographique
INDONESIE ; VIET NAM
Localisation
Fonds IRD [F A010020339] ;
Montpellier (Centre IRD)
Identifiant IRD
fdi:010020353
