HEMATHOLOGICAL RESPONSES OF Arapaima gigas (PISCES: ARAPAIMIDAE) NATURALY PARASITED BY PROTOZOANS AND METAZOANS

• Autor(a) principal: Marinho, Renata das Graças Barbosa
• Data de Publicação: 2015
• Outros Autores: Tostes, Lucas Vasques, Borges, Moacir, Yoshioka, Eliane Tie Oba, Tavares-Dias, Marcos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biota Amazônia
• Texto Completo: https://periodicos.unifap.br/index.php/biota/article/view/1237

This study compared the blood parameters of Arapaima gigas Schinz, 1822 farming, which were parasitized by a species of protozoan and three helminth species. In of one fish farm the fish were parasitized only by Ichthyophthirius multifiliis (Ciliophora), while in other fish farm it were parasitized by I. multifiliis, Dawestrema cycloancistrium and Dawestrema cycloancistrioides (Monogenoidea) and Polyacanthorhynchus macrorhynchus (Acanthocephala). Total erythrocyte, thrombocytes and leukocytes number, hematocrit, mean corpuscular volume (MCV), mean corpuscular hemoglobin concentration (MCHC), mean corpuscular hemoglobin (MCH), hemoglobin, glucose and total protein were determined. The fish parasitized by I. multifiliis, D. cycloancistrium, D. cycloancistrioides  and P. macrorhynchus showed lower hematocrit, MCV and glucose levels, and an increased hemoglobin concentration, MCH, MCHC, erythrocytes, monocytes, neutrophils and eosinophils number compared to fish parasitized only by I. multifiliis. Therefore, these results indicate a response of these blood parameters to parasitism in A. gigas.Keywords: biochemistry, leukocytes, parasites, freshwater fish, blood.