不同结构的人工礁模型对牙鲆的诱集效果初探

Experiment on the distribution of different artificial reef models for Paralichthys olivaceus

本实验研究了牙鲆 (Paralichthysolivaceus)对六种不同结构的立方体模型礁的行为反应 ,并对模型礁的诱集效果进行了比较。实验结果表明 :在自然光照条件下及未投放礁时 ,牙鲆在水槽中的分布没有选择性 ,呈随机分布 ;而投礁后各礁均能对牙鲆产生诱集效果 ,牙鲆在鱼礁标志区的分布率从 7%提高到了 14 %～2 6 % ,其中以顶部不开孔 ,四周开孔较小的D型礁的诱集效果最好 ;在 4 0W日光灯下 ,牙鲆在鱼礁标志区的平均分布率由 2 3%提高到 2 7%。

The behavior and distribution of six different cubic artificial reef models for Phralichthys olivaceus were studied in this paper. The results indicated that the distribution of Phralichthys olivaceus was random when the reef model did not exist, and the distribution ratio in marked area was 7%. When the reef models were put in the centre of the tank, Paralichthys olivaceus showed a distinct preference. The distribution ratio of Paralichthys olivaceus in reef marked area increased to a high level(14%～26%), and the reef model D had the highest distribution ratio. When the fluorescent lamp(40W) was put over the tank, the distribution ratio of Paralichthys olivaceus increased from 23% to 27%.