Haematological changesda in Oreochromis niloticus28(1): 1 - 9, 2002 Boletim do Instituto Pesca, São Paulo,
HAEMATOLOGICAL CHANGES IN Oreochromis niloticus (OSTEICHTHYES: CICHLIDAE) WITH GILL ICHTHYOPHTHIRIASIS AND SAPROLEGNIOSIS [Alterações hematológicas em Oreochromis niloticus (Osteichthyes: Cichlidae) com ictioftiríase branquial e saprolegniose] Marcos TAVARES-DIAS1, Flávio Ruas de MORAES1,2, Maurício Laterça MARTINS1 , Áureo Evangelista SANTANA3 1
Laboratório de Patologia de Organismos Aquáticos, Centro de Aqüicultura da UNESP. Departamento de Patologia Veterinária, FCAVJ. 3 Departamento de Clínica e Cirurgia Veterinária, FCAVJ. 4 Endereço/Address: Via de Acesso Prof. Paulo Donato Castellane, s/n, 14884-900- Jaboticabal, São Paulo, Brasil.E-mail:
[email protected] 2
ABSTRACT The effects of gill ichthyophthiriasis and saprolegniosis in haematological parameters and relative condition factor (Kn) of Oreochromis niloticus (Nile tilapia), naturally infected with Ichthyophthirius multifiliis and Saprolegnia sp. were studied, in comparison with those of healthy fish. Results show no difference in relative condition factor between the two groups. However, red blood cells count (RBCC), lymphocytes percentage, hemoglobin concentration, hematocrit and mean corpuscular hemoglobin concentration were significantly lower when compared with the healthy group (P
