Gilles Sylvain auteur aut IRD Ismino R. auteur aut IRD Sanchez H. auteur aut IRD David F. auteur aut IRD Nunez Rodriguez Jesus auteur aut IRD Dugué Rémi auteur aut IRD Darias Maria J. auteur aut IRD Römer U. auteur aut IRD text journalArticle eng text/pdf born digital access A prototype of an integrated closed system for fish-plankton aquaculture was developed in Iquitos (Peruvian Amazonia) in order to cultivate the Tiger Catfish, Pseudoplatystoma punctifer (Castelnau, 1855). This freshwater recirculating system consisted of two linked sewage tanks with an intensive rearing unit (a cage) for P. punctifer placed in the first, and with a fish-plankton trophic chain replacing the filters commonly used in clear water closed systems. Detritivorous and zooplanktivorous fishes (Loricariidae and Cichlidae), maintained without external feeding in the sewage volume, mineralized organic matter and permitted the stabilization of the phytoplankton biomass. Water exchange and organic waste discharge were not necessary. In this paper we describe the processes undertaken to equilibrate this ecosystem: first the elimination of an un-adapted spiny alga, Golenkinia sp., whose proliferation was favored by the presence of a small rotifer, Trichocerca sp., and second the control of this rotifer proliferation via the introduction of two cichlid species, Acaronia nassa Heckel, 1840 and Satanoperca jurupari Heckel, 1840, in the sewage part. This favored some development of the green algae Nannochloris sp. and Chlorella sp. At that time we took the opportunity to begin a 3-month rearing test of P. punctifer. The mean specific growth rate and feed conversion ratio (FCR) of P. punctifer were 1.43 and 1.27, respectively, and the global FCR, including fish in the sewage part, was 1.08. This system has proven to be suitable for growing P. punctifer juveniles out to adult, and provides several practical advantages compared with traditional recirculating clear water systems, which use a combination of mechanical and biological filters and require periodic waste removal, leading to water and organic matter losses. specialized AQUACULTURE POISSON D'EAU DOUCE METHODOLOGIE RELATION TROPHIQUE FONCTIONNEMENT DE L'ECOSYSTEME PHYTOPLANCTON RECYCLAGE DES DECHETS AZOTE PRODUCTIVITE POISSON CHAT AMAZONIE PEROU 040AQUAC Dumont B. ed. edt IRD Bernués A. ed. edt IRD 8 8 1319-1328 2014 1751-7311 https://www.documentation.ird.fr/hor/fdi:010062834 10.1017/S1751731114001165 1751-7311 [F B010062834] https://www.documentation.ird.fr/hor/fdi:010062834 https://www.documentation.ird.fr/intranet/publi/depot/2014-09-02/010062834.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-09-02 2025-06-11 fdi:010062834 fre