Data/hora: 06/06/2024 01:35:51

Provedor de dados: | 57
País: | Brazil
Título: | Dynamics of some limnological characteristics in pacu (Piaractus mesopotamicus) culture tanks as function of handling
Autores: | SIPAÚBA-TAVARES,L. H.; MORAES,M. A. G. de; BRAGA,F. M . de S.
Data: | 1999-11-01
Ano: | 1999
Palavras-chave: | Stock density; Protein levels; Fish tanks; Pacu; Limnological characteristics.
Resumo: | In order to study the water quality in fish tanks, a 166-day (January to July 1992) experiment was realized using the indigenous species "pacu" (Piaractus mesopotamicus). Two different protein levels were tested in the diet (16% and 34% crude protein) and three stocking densities (0.25, 0.50 and 0.77 fish/m²). From the results, it was observed that the interactions between stocking density and experiment length affected the characteristics bicarbonate and alkalinity, as well as the interaction between stocking density and protein levels affected concentrations of free and total CO2, conductivity and pH (P &lt; 0.05). The water temperature in tanks changed significantly during the period of study (P &lt; 0.05),decreasing gradually from summer to winter. There was no significant difference in water residence time in the tanks (P &lt; 0.05) during the experiment. The other limnological characteristics were not affected by treatments during study period.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400003
Editor: | Instituto Internacional de Ecologia
Relação: | 10.1590/S0034-71081999000400003
Formato: | text/html
Fonte: | Revista Brasileira de Biologia  v.59 n.4 1999
Fonte: | info:eu-repo/semantics/openAccess