NDLI: Cultivo de tilápia do Nilo (Oreochromis niloticus) em sistema de recirculação sem liberação de efluentes

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Cultivo de tilápia do Nilo (Oreochromis niloticus) em sistema de recirculação sem liberação de efluentes

Content Provider	Semantic Scholar
Author	Mesquita, Raquel Cavadas Tavares Ebert, André Porto, Cassiano Cauê Pôssas Oliveira, Diego De Oliveira, Karina V. V. Godoy, Leandro Cesar De Corso, Maira Nesello Souza, Silvia Maria Guimarães De
Copyright Year	2009
Abstract	Currently, aquaculture has been facing pressure from the government and consumers themselves to reduce the environmental impacts caused by production. Thus, our main goal is to optimize production while minimizing the possible problems related to the environment. Research has focused on production systems that can reduce water consumption and effluent release without reducing the production index. Closed production systems, which offer great savings in water are common in several countries like Israel and Japan, where aquaculture is well developed. In Brazil, research on this system are recent and their use is still limited. The objective was to compare the performance of juvenile tilapia in a recirculation system with biological filter, no exchange of water with a conventional system with renewal of 40% of the tank volume daily. The recirculating system showed greater (P <0.05) compared to the conventional dissolved oxygen (4.66 x 4.23 mg / L), pH (6.59 x 6.21), alkalinity (64.58 x 21.08 mg / L CaCO3) and weight gain (315.2 x 293.12 g). The ammonia concentration was higher in the conventional system (4.94 x 1.54 mg / L NAT). The specific growth rate was 2.25 and 2.13% / day and feed conversion factor was 1.14 and 1.22 in recirculation systems and conventional, respectively. Thus, the recirculation system is advantageous because productivity levels are higher, without the release of effluents, in addition to using less volume of water when compared to conventional systems.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.lume.ufrgs.br/bitstream/handle/10183/39022/000793003.pdf?isAllowed=y&sequence=1
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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