Parâmetros hematológicos e bioquímicos da tilápia-do-nilo (Oreochromis niloticus L.) sob estresse por exposição ao ar

• Ano de defesa: 2010
• Autor(a) principal: SILVA, Roberta Dias da
• Orientador(a): FIORAVANTI, Maria Clorinda Soares
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Mestrado em Ciência Animal
• Departamento: Ciências Agrárias - Veterinaria
• País: BR
• Palavras-chave em Português: 1. Estresse; 2. Hematologia; 3. Oreochromis; 4. Peixes; 1. Estresse; 2. Hematologia; 3. Oreochromis; 4. Peixes
• Palavras-chave em Inglês: 1. Stress; 2. Hematology; 4. Oreochromis; 5. Fish
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::CLINICA E CIRURGIA ANIMAL
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tde/955

The present study evaluated the hematological and biochemical parameters of adult tilapia (Oreochromis niloticus) under the influence of the physiological stress factor in animals submitted to air exposure during fattening in raceway system. Blood cell count, hemoglobin, hematocrit, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC), leukogram, differencial leukocyte count, platelet, glucose, total protein, cholesterol, triglycerides and electrolytes (calcium, chloride, sodium and potassium) were analyzed. The results showed a uniform distribution for red blood cells, hematocrit, hemoglobin, secondary Wintrobe indices, total protein, glucose, cholesterol, and serum ions, indicated by a relatively low variation coefficient. There was positive correlation only for total white blood cells, organic defense cells (neutrophils and lymphocytes), glucose, cholesterol, sodium and calcium. As for the leukocytes (WBC), as the animals were exposed to aeration, the number of leukocytes gradually decreased (leukopenia), simultaneously occurring neutrophilia and lymphopenia. The glycemic index was a good indicator of physiological stress due to hyperglycemia (82.0 + 20.88 mg/dL) demonstrated in the treatments. The air exposure constituted an imbalance factor at the ion homeostasis and at the endogenous cholesterol synthesis. Besides, the recovery time did not result in the complete physiological rehabilitation face the imposed challenge