Open-access Características hematológicas de teleósteos brasileiros: II. Parâmetros sangüíneos do Piaractus mesopotamicus Holmberg (Osteichthyes, Characidae) em policultivo intensivo

Hematological characteristics of Brazilian teleosts: II. Blood parameters of Piaractus mesopotamicus Holmberg (Osteichthyes, Characidae) in an intensive polyculture system

Resumo

Hematological parameters of freshwater fish Piaractus mesopotamicus (Holmberg, 1887) kept in an intensive polyculture system were determined. The correlations among these parameters as well as those between the parameters and the biometric data (total weight and standard length) were also analyzed. Erythrocytes count was 1.708±0.42 x 10(6)/µl, hemoglobin 6.6±2.0 g% of blood and hematocrit 32.5±4.6%, mean corpuscular volume (MCV) 209.8±69.5%, mean corpuscular hemoglobin (MCH) 40.2±5.6 pg and mean corpuscular hemoglobin concentration (MCHC) 21.4±8.4%. The percentage of defense blood cells including leucocytes and thrombocytes, was studied. The percentage of thrombocytes was 61.4±10.0%, lymphocytes 21.7±1.8%,neutrophils 10.4±11.0%, monocytes 4.7±3.3% and special granulocitic cells 1.8±2.0%. The number of erythrocytes was positively correlated with the hemoglobin rate and negatively correlated with MVC. Hemoglobin was positively correlated with MCHC whereas hematocrit was negatively correlated with MCHC and MVC. Contrarily, leukocytes did not show correlations among themselves or with the hematological parameters and biometric data.

Piaractus mesopotamicus; blood; erythrocytes; freshwater fish; leucocytes; thrombocytes


Piaractus mesopotamicus; blood; erythrocytes; freshwater fish; leucocytes; thrombocytes

Características hematológicas de teleósteos brasileiros. II. Parâmetros sangüíneos do Piaractus mesopotamicus Holmberg (Osteichthyes, Characidae) em policultivo intensivo

Hematological characteristics of Brazilian teleosts. II. Blood parameters of Piaractus mesopotamicus Holmberg (Osteichthyes, Characidae) in an intensive polyculture system

Marcos Tavares-DiasI,II; Rosilene A. TenaniI; Leonardo D. GioliI; Christiane D. FaustinoI

IDepartamento de Ciências Biológicas, Universidade de Franca. Avenida Dr. Armando Salles Oliveira 201, 14404-600 Franca, São Paulo, Brasil

IILaboratório de Patologia de Organismos Aquáticos, Centro de Aqüicultura, Universidade Estadual Paulista. Rodovia Carlos Tonanni Km 05, 14870-000 Jaboticabal, São Paulo, Brasil

ABSTRACT

Hematological parameters of freshwater fish Piaractus mesopotamicus (Holmberg, 1887) kept in an intensive polyculture system were determined. The correlations among these parameters as well as those between the parameters and the biometric data (total weight and standard length) were also analyzed. Erythrocytes count was 1.708±0.42 x 106/µl, hemoglobin 6.6±2.0 g% of blood and hematocrit 32.5±4.6%, mean corpuscular volume (MCV) 209.8±69.5%, mean corpuscular hemoglobin (MCH) 40.2±5.6 pg and mean corpuscular hemoglobin concentration (MCHC) 21.4±8.4%. The percentage of defense blood cells including leucocytes and thrombocytes, was studied. The percentage of thrombocytes was 61.4±10.0%, lymphocytes 21.7±1.8%,neutrophils 10.4±11.0%, monocytes 4.7±3.3% and special granulocitic cells 1.8±2.0%. The number of erythrocytes was positively correlated with the hemoglobin rate and negatively correlated with MVC. Hemoglobin was positively correlated with MCHC whereas hematocrit was negatively correlated with MCHC and MVC. Contrarily, leukocytes did not show correlations among themselves or with the hematological parameters and biometric data.

Key words:Piaractus mesopotamicus, blood, erythrocytes, freshwater fish, leucocytes, thrombocytes

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Recebido em 10.X.1997; aceito em 29.III.1999.

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Datas de Publicação

  • Publicação nesta coleção
    01 Jul 2009
  • Data do Fascículo
    Jun 1999

Histórico

  • Recebido
    10 Out 1997
  • Aceito
    29 Mar 1999
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