锈斑蟳(Charybdis feriatus)室内人工育苗的研究

Study of Artificial Culture of Charybdis Feriatus(Linnaeus) Indoor

盐度30、温度27.5～29.5℃、pH7.8～8.6的条件下,投喂扁藻(10×104mL-1)、轮虫(20mL-1～50mL-1)、卤虫无节幼体(1mL-1～30mL-1)及卤虫成体(0.1mL-1),进行锈斑蟳室内人工育苗试验。结果表明:溞状幼体Z1期2～4d,存活率100%;Z2期2～3d,存活率74.0%～78.0%;Z3、Z4、Z5期各3d,存活率分别为37.5%～59.0%、26.5%～43.0%、22.0%～36.7%;Z6期3～5d,存活率19.0%～26.3%;大眼幼体5～6d,存活率11.0%～11.5%;Ⅰ期幼蟹(蟹苗)存活率4.5%～5.0%,整个育苗过程共计20～26d。

In spring and autumn, the first-stage larvaes of Charybdis feriatus were reared in the natural sea water indoors （30‰ salinity and 27.5℃-29.5℃）. Results showed that larval development can be divided into 2 phases, zoea （Z） and megalopa（M）, and zoea contains 6 stage larvaes： Z1, Z2, Z3, Z4, Zs, Z6, every stage needs different time： Z1 for 2 to 4 days, Z2 for 2 to 3 days, Z3, Z4 and Z5 for 3 days respectively, Z6 for 3 to 5 days, megalopa for 5 to 6 days, it takes 20 to 26 days to complete the entire development process. The 500 first-stage larvaes were reared, finally 24 crabs juveniles （instarl, C1） of the crucifix crab were obtained, the latest survival rate was 4.8%. The survivals of the larvaes： Z1 was 100%; Z2 was 74.0%-78.0%; Z3 was 37.5%-59.0%; Z4 Was 26.5%-43.0%; Z5 was 22.0%-36.7%; Z6 was 19.0%0-26.3%; M was 11.0%-11.5%; C1 was 4.5%-5%.