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成活和生长 幼体的成活和生长试验进行了42天,然后进行手工计数(HC)见表1。一组通过计数器(C+HC)计数,表1中的V_1、V_2和W_1、W_2组分别置于45×90×25(cm)的玻璃钢培养池内,每只培养池铺有砂砾床过滤层,并有空气提升循环和增氧设施, 还有PVC管作为栖息处。 饵料用含38%蛋白质的对虾碎粒饲料。每天投喂两次以上,每次少量投喂。未吃完的饲料和碎屑每天虹吸一次。每2天换水25%,每5天换水90%。在孵化池内, 温度和光照不调节,以反映环境条件。在整个试验期间(1981年12月15日至1982年1月26日),池内平均温度白天28.5℃(最高29℃),夜间 27℃(最低26℃)。主要是柔和的自然光照.孵化场内部夜间黑暗。
Survival and growth of surviving and growing larvae were tested for 42 days and then counted manually (HC) in Table 1. One group was counted by a counter (C + HC). The groups V_1, V_2 and W_1 and W_2 in Table 1 were placed in 45 × 90 × 25 (cm) glass fiber reinforced plastic culture tanks. Each culture tank was covered with a sand- There is air to enhance circulation and aerobic facilities, as well as PVC pipe as a habitat. Feed with 38% protein shrimp crumb feed. Feeding more than twice a day, each feeding a small amount. Smell feed and debris once a day. 25% change every 2 days, 90% change every 5 days. In the hatchery, the temperature and light are not adjusted to reflect the environmental conditions. Throughout the test period (December 15, 1981 to January 26, 1982), the average temperature in the pool was 28.5 ° C during the day (up to 29 ° C) and 27 ° C (26 ° C at night) during the day. Mainly soft natural light. Hatchery interior dark at night.