两种不同结构人工礁对海胆选择饵料影响的研究

Effect of Reef Models of Two Different Structures on Sea Urchin's Selectivity to Baits

在实验室水槽内,以光棘球海胆和中间球海胆为实验对象,选用海带、鼠尾藻、孔石莼和江蓠作为饵料,设计使用工字形和井字形增殖礁,观察了礁体对海胆选择单一饵料和多种饵料的影响。结果表明:井字形礁体的放入对光棘球海胆的饵料选择性影响较为明显,礁体与四种饵料相结合,光棘球海胆对礁体处饵料选择率均为最高,分别达22.99%、17.95%、8.33%、6.67%,且与其他组差异显著(P<0.05);礁体对中间球海胆的饵料选择性影响较小,不论礁体与何种饵料结合,中间球海胆均喜摄食海带和鼠尾藻,而工字形礁体对两种海胆选择饵料影响较小。结果显示光棘球海胆是更适宜的增殖品种。同时也应根据增殖海区的海藻种类分布状况选择适宜的增殖礁形。

This paper took Strongylocentrotus nudus and S.intermedius as the experiment object and Laminaria japonica,Sargassum thunbergii O.kuntze,Ulva pertusa Kjellm and Gracilaria confervoides(L.) Grev as baits.We designed I-shaped and Well-shaped enhancemental reefs and observed the effect of reef on selection of two species sea urchin to baits in the experimental tank.The results revealed that the Well-shaped reef had quite evident effect on selection of Strongylocentrotus nudus to baits.When the reef combined wi...