围垦对西施舌浮游幼体漂移轨迹的影响

(福建省水产研究所,福建 厦门 361013)

水动力模型; 数值模拟; 西施舌苗种; 漂移轨迹

Influence of Reclamation on Drifting Path of the Planktonic Larvae of Coelomactra antiquata
LIN Jianwei,YOU Yuanxin*,LIU Guoxin

(Fishery Research Institute of Fujian,Xiamen 361013,China)

hydrodynamic model; numerical simulation; Coelomactra antiquata seed; drifting path

DOI: 10.6043/j.issn.0438-0479.201604050

备注

在对长乐漳港海域水动力模拟研究的基础上,采用质点跟踪的方法,模拟外文武海湾围垦前后西施舌(Coelomactra antiquata)浮游幼体的漂移轨迹,并由此评价海湾围垦对西施舌苗种资源分布的影响.模拟结果显示,围垦前,西施舌浮游幼体经过10 d的漂浮与迁移后附着于海湾口门附近海域,分布范围较大; 围垦后,西施舌浮游幼体最后的附着区域在垦区外侧,分布范围较小; 外文武海湾围垦很大程度上改变了西施舌浮游幼体在变态为稚贝之前的浮游轨迹,使之不能在饵料丰富的海湾口附近附着.这说明了外文武海湾围垦是导致垦区外侧西施舌分布格局变化的影响因素之一.

Based on a hydrodynamic numerical model in Changle Zhanggang Sea area,the 10-day drifting path of the planktonic larvae of Coelomactra antiquata before and after the reclamation were simulated,and the impaction on seed resources distribution of C. antiquata was evaluated.As the results revealed,the planktonic larvae would attach around the bay entrance and distribute in a larger space after 10-day drifting before reclamation,and after reclamation in contrast,the final attachment location of the planktonic larvae would drift almost in a smaller space and away from the bay.The reclamation in Waiwenwu Bay has a significant influence on planktonic larvae's drifting path and distribution before they grow into shellfish,and could be one factor for the changes of C. antiquata distribution patterns outside the reclamation area.