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Haematology is important in order to know the state of health of fish species.
Some haematological parameters of inter-generic hybrids African catfish (Clarias
anguillarisx Heterobranchus bidorsalis) were investigated in North
east Nigeria. The study aimed at investigating the haematological competence
of the hybrids for survival in culture conditions in the region. Most fish farmers
in the North east shade their ponds concrete of earthen due to stress as a result
of harsh weather conditions in the region. Red Blood Cells (RBC) were significantly
higher (2.46±0.03x103 μL-1) in hybrid CaxHb
(Heteroclarias). However, MCV and MCH were significantly (p<0.05)
higher (138.07±1.98 fl and 46.53±0.70 pg, respectively) in pure
line of Heterobranchus bidorsalis. MCHC values of pure line C. anguillaris
and their maternal hybrids ♀CaxHb♂ (30.03±1.96 and 35.23±0.62
g dL-1, respectively) varied significantly (p<0.05) from those
of Heteroclarias (34.57±0.33 g dL-1). However, all
the blood parameters of fish species recorded during this study were within
the healthy ranges for fish. The results of this study show that Heteroclarias
have more haematological competence for survival in culture conditions in the
North east region.
