东海北部渔场葛氏长臂虾密度分布与硝酸盐分布的研究  

Relationship between Density Distribution of Shrimp Palaemon gravieri and Nitrate Concentration Distribution in the Northern Fishing Areas in East China Sea

作　　者：吕华庆[1] 宋海棠[2] 

机构地区：[1]浙江海洋学院海洋科学与技术学院,浙江舟山316004 [2]浙江省海洋水产研究所,浙江舟山316100

出　　处：《水产科学》2006年第3期109-112,共4页Fisheries Science

基　　金：国家海洋勘测专项资助项目;中国水产科学研究院资助项目

摘　　要：以“东海区虾蟹资源调查”课题在1998年8月和1999年2月获得的东海水文、虾类调查资料为基础,结合参考资料,对东海北部海区(30°N以北、128°E以西)的葛氏长臂虾密度分布规律进行了分析,对硝酸盐浓度分布进行了研究。虾类调查采用单船桁杆式拖网扫海,调查时间与硝酸盐采样同步。结果发现:(1)硝酸盐浓度分布受长江冲淡水影响很大,夏、冬有别;(2)夏、冬季葛氏长臂虾的密度分布均与硝酸盐浓度分布成反比关系,且吻合较好;(3)葛氏长臂虾的密度分布在很大程度上取决于长江冲淡水的走向。Based on the hydrological and shrimp survey data got in Aug. 1998 and in Feb. 1999 from the project Shrimp ＆ Crab Resource Survey in the East China Sea and related materials, the density distribution pattern of shrimp Palaemon gravieri in the northern fishing areas of the East China Sea, south to 30°N and east to 128°E, was analyzed; and the nitrate concentration distribution was studied. During surveying the shrimp, a single-ship beam-type trawl net was used, mean while nitrate Concentration was determined. Results showed that （ 1 ） the nitrate concentration distribution was highly affected by the Yangtze River diluted water and there was significant difference in the concentration distribution in summer and winter; （2） the density distributions of Palaemon gravieri were an exact adverse relation to the nitrate not only in summer but also in winter ; （ 3 ） Palaemon gravieri density distribution largely depended on the on-going direction of Yangtze river diluted water.

关 键 词：葛氏长臂虾 硝酸盐 长江冲淡水 

分 类 号：S922.93[农业科学—渔业资源]