Correlations Between Biochemical Factors of Coelomic Fluid with Biological Characteristics of Gonad, Fertilization Success, Hatching Rate and Larval Size in Caspian Kutum, Rutilus frisii Kutum

A number of biochemical factors of coelomic fluid (sodium,potassium, magnesium, calcium, cholesterol, total protein and glucose) were determined with biological characteristics of gonad (biological characteristics of egg, hydrated egg and gonad's weight), fertilization success, hatching rate and larval size in 80 female of the migratory population of Caspian Kutum in Tajan river of Iran in Spring of the 2007. There was significant correlation between potassium and perivitelline space (P<0.05). In contrast, there was an inver t correlation between potassium and yolk sphere to perivitelline space ratio (P<0.05). With increasing of magnesium, gonad's weight increased. There was an invert correlation between sodium to potassium ratio with number of egg in one gram of ovulated gonad (P<0.05). A significant correlation between sodium to potassium ratio and calcium to potassium ratio with larval size existed in second biometry (P<0.05). Correlation between total protein with hydrated egg's diameter, surface and volume was direct (P<0.05), but it was contrast for surface to volume ratio. There was a direct correlation between cholesterol and volume of hydrated egg (P<0.05). Correlation between glucose with hydrated egg's diameter, surface and volume and perivitelline space, contrary to surface to volume ratio, was invert (P<0.05).

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