養殖ハマチ血清蛋白,燐,コレステロール,カルシウムおよびアルカリ性フォスファターゼ含量の季節変化
スポンサーリンク
概要
- 論文の詳細を見る
"Hamachi" culture has been rapidly developing in recent years. But it is considered that there is much room for further research, especially, into feedstuff and technical manage-ment. Needless to say, blood properties are connected with the physiological conditions. From July 1961 to Feb. 1962 the authors investigated the seasonal variations of serum protein, phosphorus, calcium, cholesterol and alkaline phosphatase contents in the blood of cultured "Hamachi". The results obtained are as shown in Table 2 and Fig. 2-7. (1) From spring to summer, the contents of these constituents increased with the speedy growth of the fish. Subsquently, the contents began to decline with the drop of water tem-perature, with the exception of cholesterol contents which rather increased in winter after a temporary decrease in autumn. (2) In winter, the value of "Free cholesterol content/Total cholesterol content" and "Inorganic phosphorus content/Total phosphorus content" slightly rose and dropped respec-tively. (3) The coefficients of variance of the contents of each constituents did not show the similar seasonal change but those of alkaline phosphatase and free cholesterol contents were generally high and low in calcium. (4) In such excessive culture as three times number above normal, the individual difference became larger and serum protein and total phosphorus contents were lower and the value of "Inorganic phosphorus content/Total phosphorus content" was extremely higher compared with those of moderate.