单环刺虫益人工育苗技术的研究  

Studies on Technique for Artificial Breeding of Urechis unicinctus

作　　者：李诺[1,2] 唐永政 宋淑莲[1,2] 王宝钢 

机构地区：[1]烟台大学水产学院 [2]牟平区海珍品试验场

出　　处：《齐鲁渔业》1997年第1期1-4,共4页Shandong Fisheries

基　　金：山东省科技发展计划重点项目

摘　　要：在单环刺自然繁殖期，以诱导法或剖取法获取精、卵，在水温１５～２２℃下，进行授精、孵化、幼虫培育。对幼培育过程的设施、理化条件、管理技术等进行了研究试验。结果：１９９４年，单位水体平均培育幼１６８４个／；１９９５年，单位水体平均培育幼４０６万个／。经专家鉴定。Studies were carried out on the technique for artificial breeding of Urechis unicinctus during 1993～1995.The Urechis unicinctus is gonochorism.Its spawning season is during April～May along the Yantai coast with the water temperature at 9～12℃.The collected eggs and sperms were artificially induced with a shade dried and temperature dropped method or a anatomical method.When the density of hatching fertilized eggs was 150 eggs/ml at the water temperature 15℃,the hatching rate was about 75%.The water temperature of rearing larvae was at 15～22℃.The rearing density of trachophora larva,somite larva and worm shaped larva was 1～4 larvae/ml,1～2 larvae/ml and 0.3～1 larva/ml,respectively.The feed were Isochrysis galbana 3011,Nitzschia closerium,Platymonas sp. and Chlorella sp..When somite larva changed into worm shaped larva in the 28～30th day after fertilization,sands should be covered in pool bottom for seed collecting.The rate of matamorphosis was 68～88%.Ten days later,young Urechis was developed.The density of rearing young Urechis was 40～50 seeds/.In 1994,11.3 of water area produced 19 034 young Urechis,1680 seeds/ on average.In 1995,27.2 of water area produced 11 043 200 young Urechis,406 000 seeds/ on average.

关 键 词：单环刺YI 繁殖 人工育苗 

分 类 号：S968.328[农业科学—水产养殖]