真鲷的摄食、生长和生态转换效率测定──室内模拟与现场方法的比较

FOOD CONSUMPTION, GROWTH AND ECOLOGICAL CONVERSI ON EFFICIENCY OF PAGROSOMUS MAJOR：COMPARISON BETWEEN IN LABORATORY AND IN SITU DETERMINING METHOD

将Eggers现场胃含物法移入室内大型玻璃钢水槽内进行，然后在尽可能相近的实验条件下，比较了室内流水模拟法和Eggers现场胃含物法，测定真鲷日摄食量、日生长量和转换效率等生态能量学参数的差异。结果发现，尽管两种方法存在着研究对象分别为个体和群落的差异，但真鲷的群居性仅能增大其摄食和生长量，而不影响其以比能值为单位表示的生态转换效率，两种方法测得的真鲷生态转换效率分别为24.43% (kJ)和21.76% (kJ)，结果基本相近。由于研究中注意保持了两种方法在相同条件下同步进行，可推测由上述两种方法测得的真鲷能量转换效率具有一定的可比性。

Egger's gut content method usually applied in situ, was carried out in laboratory Pargosomus major’s ecological energetics parameters , such as food consumption, growth and ecological conversion efficiency, were determined by the above method and compared with those determined by the traditional inlaboratory method. The results showed that the food consumption and growth detemined by Egger's method were higher than those obtained by the inlaboratory method,although there was no remarkable difference in the conversion efficiencies, which were rspectively 24.43%(kJ) and 21.76%(kJ), when calculated with the energy value. Because the above results were determined under the same conditions, it can be deduced that there is no remarkable difference between the conversion efficiencies determined by both of methods.