Effect of Induced Gonadal Development and Starvation on some Haematological Parameters of Anguilla anguilla L. PDF

Keywords

microcytes, macrocytes, European silver eel

Abstract

Blood pictures of the European silver eel Anguilla anguilla L. were described. Blood was obtained from control (immature) male and female silver eels, at ripe stage after developmental maturation of gonads by intramuscular injection with chorionic gonadotropin hormone (HCG) for male and Carp pituitary (CP) mixed with (HCG) for female, and after long starvation for both sexes. In normal blood (control), the haematological parameters such as haemoglobin, haematocrit, red blood cells were higher in male than in female. Changes in blood picture were used as criteria of systemic response to experimental conditions.The effects of developing testes led to significant decrease in haemoglobin, haematocrit, whereas developing ovaries showed more significant decrease in haemoglobin, haematocrit, red blood cell count. As a result of such decrease in haematological parameters in both male and female, the experimented fish suffered from certain degrees of anaemia. Fish of extended starvation revealed sharp decrease in all haematological parameters. An abnormal blood film is seen in nutritional anaemia. There is marked anisocytosis with predominantly hypochromic irregular microcytes and macrocytes