Piscicultura e manejo da qualidade da água
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
---|---|
Data(s) |
27/05/2014
27/05/2014
07/01/2013
|
Resumo |
Fish farms' water quality management is analyzed with regard to the management employed and the different trophic states are compared within the system during the dry and rainy seasons. Six sites were marked two in the water supply (P1 and P2), and four within the fish farm (P3 to P6). Whereas sites P1 and P2 (water supply) were characterized as oligotrophic, the others were mesotrophic and eutrotrophic sites. Environmental variables, mainly nutrients, conductivity, COD, BOD5 and TSS tended to increase as from P3 due to management and fertilization. Greater impact has been registered in the fish farm under analysis for variables COD, ammonia, total phosphorus and TSS during the discharge and pond emptying period. Frequent monitoring of water quality should be undertaken in fish breeding and plankton production ponds, especially in those close to P3 and P4. Removal of sediment in decantation lake or P5 is also recommended to decrease nutrient concentrations, especially phosphorus, accumulated on the bottom soil. |
Formato |
21-27 |
Identificador |
http://dx.doi.org/10.4025/actascibiolsci.v35i1.10086 Acta Scientiarum - Biological Sciences, v. 35, n. 1, p. 21-27, 2013. 1679-9283 1807-863X http://hdl.handle.net/11449/74354 10.4025/actascibiolsci.v35i1.10086 2-s2.0-84871738706 2-s2.0-84871738706.pdf |
Idioma(s) |
eng por |
Relação |
Acta Scientiarum: Biological Sciences |
Direitos |
openAccess |
Palavras-Chave | #Dry and rainy seasons #Physical-chemical variables #Trophic index #ammonia #phosphorus #chemical oxygen demand #concentration (parameters) #environmental factor #environmental monitoring #nutrient concentration #nutrient content #pisciculture #seasonal variation #water management #water quality #water supply |
Tipo |
info:eu-repo/semantics/article |