Temporal variations in haematological and biochemical indices of the Caspian kutum, <Emphasis Type="Italic">Rutilus frisii kutum</Emphasis> |
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Authors: | Ali Bani Ali Haghi Vayghan |
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Institution: | (1) Fisheries Department, Faculty of Natural Resources, University of Guilan, PO Box 1144, Sowmeh Sara, Iran |
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Abstract: | The pattern of haematology and blood biochemistry variations of healthy adult female kutum Rutilus frisii kutum (Cyprinidae) was investigated in the three reproductive states: maturing (autumn), pre-spawning (winter), and spawning (spring).
Red blood cells, haemoglobin, and haematocrit were highest in autumn, whereas the highest values for white blood cells, mean
corpuscular volume (MCV), and mean corpuscular haemoglobin (MCH) were observed in winter. With the exception of MCV and mean
corpuscular haemoglobin concentration (MCHC), fish size had no effect on haematological and biochemical parameters. MCV was
higher in larger fish, whereas the reverse trend was found for MCHC. Decreased levels of plasma glucose, cholesterol, and
triglyceride in the pre-spawning period, when female ovaries were developing, may have been due to the combination of reproductive
effects and food shortage in winter. Total protein levels were lower during the maturing period than during the pre-spawning
period. The results of this study suggest that temporal variations in haematological and biochemical parameters of blood are
significant and should be considered when these parameters are used to assess fish health status. |
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