摘要
为探索适宜青蛤(Cyclina sinensis)工厂化养殖的新底质材料,解决传统泥沙底质二次使用困难问题,采用不同新底质材料(石英砂、玻璃珠和贝壳粉)进行了不同规格(壳长 1.5、2.5、3.5 cm)青蛤的潜沙能力比较试验.结果表明:青蛤潜沙分为 6 个步骤,分别为潜沙准备伸出水管、伸出斧足、斧足插入底质、竖壳、潜沙和潜沙完成;同一底质环境下不同规格青蛤潜沙完成时间、潜沙率及潜沙深度均具有极显著性差异(P<0.01);不同底质环境下壳长 1.5 cm青蛤在玻璃珠底质中潜沙时间最短(P<0.01),2.5、3.5 cm青蛤在玻璃珠和贝壳粉底质中潜沙时间无显著性差异(P>0.05);3 种规格的青蛤在贝壳粉底质中潜沙率最高(P<0.01),在玻璃珠底质中潜沙最深(P<0.01).研究表明,青蛤对 3 种新底质材料均有较好的潜沙适应性,可以替代传统泥沙底质,其中青蛤在玻璃珠底质中潜沙时间最短,潜沙最深,本研究结果为改良青蛤工厂化养殖底质及提高养殖经济效益提供了有益参考.
Abstract
In order to explore new substrate materials suitable for industrial culture of venus clam(Cyclina sinen-sis)and to solve the reuse problem of traditional sediment substrate,venus clam with shell length of 1.5,2.5,and 3.5 cm was reared in a clean 32 cm×24 cm×20 cm tank at the bottom covered with 5 cm thickness of shell powder,quartz sand,glass beads and sand(as control group)at sea water depth of 15 cm at water temperature of(21±1)℃to compare the burrowing ability of different sizes of venus clam.The results showed that there were 6 steps for the clam to burrow into the sediment,including ready to stretch out of siphon,extension of foot,insertion of the foot into the bottom material,the vertical shell,burrowing and the completion of theburrowing.There were signifi-cant differences in the completion time,burrowing rate and burrowing depth among different sizes of the venus clam at the same sediment(P<0.01),with the shortest burrowing time in the venus clam with shell length of 1.5 cm in glass bead substrate(P<0.01),and without significantly different in the venus clam with shell length of 2.5 cm and 3.5 cm in glass bead substrate and shell powder(P>0.05).The three sizes of venus clam had the maximal bur-rowing rate in shell powder bottom(P<0.01),and the deepest in glass beads sidement(P<0.01),showing good adaptability to the three new sediment materials which can replace the traditional sediment,especially,the shortest and deepest burrowing in the glass bead sediment.The findings provide a theoretical basis for improving the bottom material of the industrial culture of C.sinensis and economic benefit of the culture.
维普
万方数据