Characterization and evaluation of the impact of feed management on the effluents of Nile tilapia (Oreochromis niloticus) culture

Ana Eliza Baccarin; Antonio Fernando Monteiro Camargo

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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Characterization and evaluation of the impact of feed management on the effluents of Nile tilapia (Oreochromis niloticus) culture

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Author(s):	Ana Eliza Baccarin ^[1] ; Antonio Fernando Monteiro Camargo ^[2] Total Authors: 2
Affiliation:	^[1] UNESP. Centro de Aqüicultura - Brasil ^[2] UNESP. Instituto de Biociências. Departamento de Ecologia - Brasil Total Affiliations: 2
Document type:	Journal article
Source:	Brazilian Archives of Biology and Technology; v. 48, n. 1, p. 81-90, 2005-01-00.
Abstract
The objective of this study was to evaluate the effect of different feed management on the quality of effluent water generated in Nile tilapia (Oreochromis niloticus) culture ponds. Feed was supplied as follows: natural food, and pelleted, extruded or minced ration. The study was conducted during 19 weeks in 12 continuous water exchange ponds of 300 m² each, with a population of male Nile tilapia juveniles, in a density equal to 1.7 fish m-2. Feeds contained 30% crude protein, 3,000 kcal digestible energy, and were supplied twice a day. Natural food consisted of chicken manure. Temperature, dissolved oxygen, pH, total phosphorus, total nitrogen, chlorophyll a and suspended solids were monitored weekly in the supplying and effluent water. Water residence time was also determined for the ponds. In general, effluent water quality decreased in all treatments. (AU)

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