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Growth and stress of dourado cultivated in cages at different stocking densities PAB
Braun,Neiva; Dafre,Alcir Luiz; Lima,Ronaldo Lima de; Beux,Luis Fernando; Brol,Fernanda Franciele; Nuñer,Alex Pires de Oliveira.
The objective of this work was to evaluate the growth and the stress levels of juvenile dourado (Salminus brasiliensis) cultivated in cages. Fish stocked at densities of 15 (D15) and 30 (D30) fish per square meter were evaluated in a completely randomized design with three replicates. Fish were fed twice a day with extruded ration (42% crude protein). Density influenced only biomass and daily food intake, and glucose and lactate concentrations increased over time. D15 and D30 did not influence the growth of dourado. However, the increase of glucose and lactate levels over time indicates that cultivation in cages is a stressful condition for this species.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Salminus brasiliensis; Glucose; Hematocrit; Hemoglobin; Lactate.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800053
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Survival and the growth of pintado (Pseudoplatystoma corruscans) post-larvae on different salinities BABT
Beux,Luis Fernando; Zaniboni Filho,Evoy.
The aim of this study was to evaluate the survival and growth of pintado, Pseudoplatystoma corruscans, post-larvae (PL) submitted to seven salinities: S1: 0; S2: 1.7; S3: 3.3; S4: 5; S5: 6.7; S6: 8.3 and S7: 10‰ distributed in a complete randomized design with three replicates. PL were stocked in 5-l round plastic containers at a density of 15 PL/liter and maintained in the dark. The water was salinized with iodine-free sodium chloride (NaCl). PL were fed six times a day with 500 Artemia sp. nauplii/PL. Survival was high up to salinity 1.7‰, both on the fifth and on the tenth day of experiment, but decreased quickly in salinities above 5‰. Better growth rates were observed in salinities 0 and 1.7‰, however, high growth observed in freshwater was due to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pseudoplatystoma corruscans; Salinity; Pintado; Artemia sp.; Post-larvae; Survival.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000500010
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