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KMID : 0900919920160040363
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Korean journal of Animal Reproduction
1992 Volume.16 No. 4 p.363 ~ p.376
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Physiological Studies on Adaptation of Tilapia(Oreochromis miloticus) in the Various Salinities II. Serum Components Levels and Electrophoretic Patterns
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Park Hong-Yang
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Abstract
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This study was taken to examine serum components concentrations and electrophoretic patterns of female tilapia(Oreochromis niloticus) living in 0textperthousand, 10textperthousand, 20textperthousand, and 30textperthousand salt concentrations, respectively. The results obtained in these experiments were summarized as follows. The level of albumin and total protein showed changes in each salinity, but didn’t significantly(P<0.05) change in Oreochromis niloticus. The level of BUN didn’t significantly(P<0.05) change. When fish were adapted from 0textperthousand to 10textperthousand, 20textperthousand and 30textperthousand, each calcium level in every salinity groups showed less than that of control, and didn’t significantly change in 10textperthousand, 20textperthousand, 30textperthousand salinity. The level of calcium didn’t significantly(P<0.05) change in each salinity. In 20textperthousand salinity, the level of cholesterol was at the highest peak. When fish were adapted from 0textperthousand to 10textperthousand, 20textperthousand and 30textperthousand, each glucose level gradually decreased. When fish were adapted from 0textperthousand to 10textperthousand, 20textperthousand and 30textperthousand, each glucose level gradually decreased. When fish were adapted from 0textperthousand to 10textperthousand, 20textperthousand and 30textperthousand. In 30textperthousand salinity, the level of alkaline phosphatase was at the highest peak. The level of serum enzyme such as SGOT and SGPT was higher in seawater-adapted group than in freshwater group. The level of phosphorus chnage significantly(P<0.05) in each salinity. Correlation coefficient between serum albumin and glucose in 0textperthousand was ＋0.924. Correlation coefficient between serum SGOT and SGPT of individuals in 0textperthousand was ＋0.917. Fraction 1 of transferrin patterns of tilapia(Oreochromis niloticus) adapted in seawater was much thicker than that of transferrin patterns of individuals adapted in freshwater. Also fraction No. a wasn’t observed in some individuals adapted in freshwater. These results showed that transferrin adapted in seawater relatively increased. Slight differences, that is, showed to be observed in total iron binding capacityand iron saturatin rate between tilapia adapted in freshwater and in seawater. The increase in total iron binding capacity was attributed to a rise in transferrin pressent in the first fraction of serum protein adapted in seawater. Accordingly, the serum iron levles seemed to be related to salinity(textperthousand).
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KEYWORD
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Tilapid(Oreochromis niloticus), adaptation, serum components, transferrin, electrophoretic patterns
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