%0 Book Section
%9 OS CH : Chapitres d'ouvrages scientifiques
%A Hem, Saurin
%A Avit, J.L.
%T Acadja-enclos used in Côte d'Ivoire as an extensive aquaculture system
%B The third international symposium on tilapia in aquaculture
%C Paris (FRA) ; Makati City
%D 1996
%E Pullin, R.S.V.
%E Lazard, J.
%E Legendre, Marc
%E Amon Kothias, J.B.
%E Pauly, D.
%E Lhomme-Binudin, C.
%L fdi:010018532
%G ENG
%I ORSTOM ; ICLARM
%@ 971-8709-42-8
%K AQUACULTURE ; PISCICULTURE ; ELEVAGE EXTENSIF ; SYSTEME D'ELEVAGE ; PRODUCTIVITE ; LAGON
%K COTE D'IVOIRE
%N 41;1325
%P 46-53
%U https://www.documentation.ird.fr/hor/fdi:010018532
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers20-07/010018532.pdf
%W Horizon (IRD)
%X Acadja is a fishing method widely practiced in the coastal lagoons of Benin. The principle of this traditional fishery is to set dense masses of branches in shallow water, which attract wild fish in large numbers. The yearly production is very high : 7 to 20 t/ha. Exploited within a short time (two to three months), the acadja system could be considered simply as a fish trap or aggregating device. If harvested after a longer period (six to 12 months), it may be considered as a culture system (retention, breeding, propagation, natural feeding and growth). This contribution explores the latter. Two production systems were used : an acadja-enclos (enclosure with acadja) and an enclosure without acadja used a a control. After 12 months, a biomass equivalent to 8 t/ha was harvested from the acadja, eight times higher than the control system. Among the 18 species of fish harvested, #Sarotherodon melanotheron$ represented 79% of the biomass. Analysis of the fish population showed that the young fry had entered through the net at the beginning of the experiment and grown in the acadja-enclos. There were no differences in condition factor between the #S. melanotheron$ from the acadja-enclos and from open water. Further experiments have shown that acadja-enclos, which can be considered as "bamboo reefs", are very suitable for fish production in rural Côte d'Ivoire. The acadja-enclos system appears to increase productivity greatly in lagoon fish culture. The same principle could be applied in extensive aquaculture or in various aquatic management programs. Further research is needed to understand the basis of this high productivity. (Résumé d'auteur)
%S ICLARM Conference Proceedings (PHL): ICLARM Contribution
%B ISTA III : International Symposium on Tilapia in Aquaculture
%8 1996
%$ 040AQUAC