【摘要】 应用测定流水中溶氧量的方法，对鲑点石斑鱼幼鱼耗氧率进行研究，结果表明：鲑点石斑鱼幼鱼耗氧率随水温的升高而升高，鱼平均体重２５ ．６２５ ～２８ ．１１１ ｇ ，水温１７ ．６ ° Ｃ 时，按鱼体重计（ 下同） ，耗氧率为１ ．５１７ μｇ／（ｇ·ｍｉｎ） ；３３ ．４ ° Ｃ 时，耗氧率达７ ．２３０ μｇ／（ｇ·ｍｉｎ） ．水中溶氧量对鲑点石斑鱼耗氧率的影响只在一定的范围内起作用，在水温２６ ．０ ～２７ ．３ ° Ｃ、盐度３３ ．６ 、鱼体重２８９ ．５０ ～３３８ ．９８ ｇ 条件下，溶氧量低于１ ．８ ｍｇ／ Ｌ 时，耗氧率随溶氧量降低而急剧下降；高于１ ．８ ｍｇ／ Ｌ时，耗氧率几乎不受水中溶氧量的影响．溶氧量（ Ｘ） 与号氧率（ Ｙ） 的关系可以用 Ｙ＝ ０ ．１９８ ４ Ｘ３ －１ ．７３４ ８ Ｘ２ ＋ ４ ．８６９ ３ Ｘ－ １ ．５４９ 表示．鲑点石斑鱼的耗氧率有明显的昼夜变化，在水源ｐ Ｈ８ ．１ 、盐度３３ ．６９ 、水温２５ ．８ ° Ｃ 条件下，鱼平均体重２１ ．４１１ ｇ ，１７ ：００ 耗氧率最高，为６ ．１２７ μｇ／（ｇ·ｍｉｎ） ，０９ ：００ 耗氧率最低，为３ ．０５２ μｇ／（ｇ·ｍｉｎ） ．与测定昼夜变化的各项条件相同时，鲑点石斑鱼在安静状?更多还原

【Abstract】 The baby fish oxygen consumption of E. fario under different conditions were measured and studied. The results are showed as follows: That the higher the water temperature is, the higher the rate of baby fish oxygen consumption of E. fario is. At 17.6 °C, and body weight 25.625～28.111 g , the rate of oxygen consumption is 1.517 μg/(g·min); at 24.5 °C, the rate of oxygen consumption is 3.202 μg/(g·min); at 33.4 °C, the rate of oxygen consumption reaches 7.230 μg/(g·min) . The water temperature within the range of 21～27 °C, has the least effects on the rate of the oxygen consumption.Only under a special range of dissolved oxygen (lower than 1.8 mg/L), change in the dissolved oxygen affects the rate of oxygen consumption of E. fario. As the dissolved oxygen is less than 1.8 mg/L, the rate of the oxygen consumption showed rapid decrease. When the amount of dissolved oxygen is higher than 1.8 mg/L, the rate of oxygen consumption is hardly affected. The relation between the rate of oxygen consumption ( Y ) and the dissolved oxygen ( X ) may be expressed as: Y=0.198 4X 3-1.734 8X 2+4.869 3X-1.549. Within a whole day, from 17:00 to 09:00, the rate of oxygen consumption of E. fario decreases continuously, and from 09:00 to 17:00, the rate increases in succession.And under the active condition, the rate of oxygen consumption is 38.50% higher than under quietude.更多还原