短钝溞（Daphnia obtusa Kurz)在碳酸盐型水体中的移植驯化与培养

Transplantation and Domestication Culture of Daphnia obtusa Kurz in the Carbonate Hard Water

利用斜生栅藻（Ｓｃｅｎｅｄｅｓｍｕｓ ｏｂｌｉｑｕｕｓ）对山东禹城地区碳酸盐水型瘦水与肥水两种水体进行生物改良后，引种短钝溞（ Ｄａｐｈｎｉａ ｏｂｔｕｓａ Ｋｕｒｚ）作室内培养试验研究结果表明，短钝溞在有适宜种类微藻作开拓环境的先驱生物存在条件下，可以耐受碳酸盐型水质，并能成功地生长繁殖，本文还对３种培养液（有机型、无机型。

Daphnia obtusa Kurz were cultured in 3 kinds of carbonate hard water, treated by micro- algae (Scendesnus obliquas Turp). The water fleas were harvested in two ways - interval and inoculalting harvests. The results were shown as follows after comparison. In the presence of the algae severed as the pioneer organisms in the water, the water fleas could be inoculated. During the still culture stage without harvest, the population growth curves (N) show that N. (in the improves fish-farming sewage) > N. (in the pure fish-farming sewage) > N, (in the improved ground water). During the stage of interval harvest, the mathematical functions of yield (the regression o f the general number ranks accumulated from original data gathered each time) in the three kinds o f culture medium were all shown to be Logistic growth curve and the population yields shown as N. > N& > N. and during the stage of noculation harvest: N, > N. > N.'