Study on Some Blood Ionic and Metabolic Indices in Maturated and Maturing Female's Kutum (Rutilus Frisii Kutum)

Rutilus frissi kutum is the most important bony fish inhabiting the Caspian Sea and is a very popular species among fishers، coastal dwellers and the people in Iran as well as in other Caspian littoral states for its high nutritive value and for its rich and good tasting meat. Blood indices are very important in fish physiology، the more knowledge of blood indices of fishes can be caused the more ability of breeding، culturing and restocking of them. This research was conducted amounts of ionic (sodium، potassium، magnesium and calcium) and metabolic (cholesterol، total protein and glucose) parameters in 35 maturated and 45 immature female Kutum blood in Guilan province، Sefid-rood river of southwestern Caspian Sea were determined. Fish samples were collected monthly from March to May in 2008. Blood samples were taken from the caudal vessels. No abnormalities or pathological changes in the ovarian or body of the investigated fish were detected. The results showed that Sodium، potassium، calcium and magnesium were maximum to minimum respectively and concentration of cholesterol was more than glucose and glucose was more than total protein in serum blood. There was a significant correlation between calcium and total protein in maturated (4. 2±0. 05 mmol/l، 3. 1±19. 6 mg/dl) and immature specimen (8. 1±0. 14 mmol/l، 4. 1±18. 7 mg/dl) (P<0. 01). The differentiation between glucose with cholesterol in maturated (87. 7±56. 3 mg/dl، 475. 3±64. 2 mg/dl) and immature specimen (45. 1±21. 1 mg/dl، 347. 3±95. 1 mg/dl) was significant (P<0. 01). No significant correlation between sodium and magnesium were be detected (p>0. 05). According to influence of ionic and nonionic blood’s plasma on regulation of reproduction and growth in kutum، have an important role and can use in management of reproduction and culture of this valuable species.