968 resultados para Hematologia de peixes


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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Ciências Biológicas (Zoologia) - IBRC

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Pós-graduação em Ciências Biológicas (Zoologia) - IBRC

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Pós-graduação em Ciências Biológicas (Zoologia) - IBRC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Pós-graduação em Aquicultura - FCAV

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The objective of this work was to evaluate the effect of slightly saline water in an intensive larviculture of tambaqui, matrinxã, apaiari, and piau, during the initial days of active feeding. Larvae were reared in artificial saline water, at concentrations from 0 (freshwater) to 14 g L-1 NaCl (at a 2.0 g L-1), and fed with two portions of Artemia nauplii, following a specific protocol for each species, in a completely randomized design, with 3 replicates. Tambaqui, matrinxã and apaiari larvae can be reared at saline concentrations till 2 g L-1 without impairing growth and survival. Piau larvae were more tolerant and endured saline water until 4 g L-1. At saline concentrations above that, fish mortality increased and reached 100% at 6 g L-1, for matrinxã and apaiari, and at 10 g L-1, for tambaqui. Saline water at 2 g L-1 provided a higher survival for matrinxã, and higher growth for tambaqui, apaiari and piau. These last two species showed a better growth performance with the highest quantity of nauplii. Slightly saline water at 2 g L-1 is beneficial to these studied species, as it optimizes larval growth potential and the use of Artemia nauplii as live food.

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The objective of this work was to evaluate the anesthetic effect of clove oil and benzocaine on the hematology and osmotic fragility of erythrocytes in tambaqui (Colossoma macropomum). Thirty adult fish were evaluated in three treatments: a control, without anesthetic; anesthesia with clove oil at 50 mg L-1; and anesthesia with benzocaine at 100 mg L-1. Blood was collected for hemogram determination, and a test for the erithrocyte osmotic-fragility was applied. The utilized doses of clove oil and benzocaine are not appropriate for hematologic studies to establish reference values for tambaqui because they cause significant changes of the hematologic parameters, such as leukocytosis and iatrogenic hemolysis.

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Pós-graduação em Aquicultura - FCAV

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Pós-graduação em Aquicultura - FCAV