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

Brazilian Archives of Biology and Technology

Ana Eliza Baccarin²  Antonio Fernando Monteiro Camargo¹ 

[1] ,UNESP Centro de Aqüicultura São Paulo SP ,Brazil

关键词: Fish culture;    environmental impact;    feed management;    effluent;   

DOI  :  10.1590/S1516-89132005000100012

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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