关键词: 中间球海胆, 海上筏式养殖, 南北接力养殖

Abstract:

In order to explore the feasibility of the north-south relay aquaculture model for S.intermedius between Fujian and Shandong Province,raft aquaculture experiments were conducted in the Qida sea area of Lianjiang,Fujian and Yandunjiao sea area of Rongcheng,Shandong from March 2021 to April 2022.Using abalone raft aquaculture facilities,regular feeding of kelp (Laminaria japonica) and asparagus (Gracilaria lemaneiformis) were carried out.After 13.5 months of breeding,the shell diameter of large-size S.intermedius had reached (61.97±2.38) mm,the body mass had reached (93.13±9.84) g,and the gonadal index had reached 17.69%±1.84%.The shell diameter of the middle-size S.intermedius had reached (58.20 ± 3.03) mm,the body mass had reached (68.43±8.88) g,and the gonadal index had reached 15.38%±1.44%.The shell diameter of the small-size S.intermedius had reached (51.39±2.41) mm,the body mass had reached (53.28±8.71) g,and the gonadal index had reached 13.45%±1.39%.The experimental results showed that according to the seasonal differences in seawater temperature between Fujian and Shandong,S.intermedius sea raft relay aquaculture could greatly improve the growth rate of sea urchins,shorten the breeding cycle,and was an efficient breeding model with good promotion value.Using the north-south relay aquaculture model;choosing large-size S.intermedius seedlings to breed could bring higher economic benefits.

Key words: Strongylocentrotus intermedius, raft culture at sea, north-south relay aquaculture