摘要
根据2017年7-12月中西太平洋金枪鱼延绳钓渔船卫星AIS数据及海表温度数据,利用全局空间自相关中的莫兰指数及局部空间自相关中的热点分析方法,得到了中西太平洋金枪鱼延绳钓中心渔场位置及变动情况,并提取了中心渔场处海表温度范围。结果表明:1)中西太平洋金枪鱼延绳钓渔船捕捞努力量存在空间自相关并呈显著聚集分布模式,所得热点区域可以作为中西太平洋金枪鱼延绳钓作业中心渔场。2)各月均存在多个中心渔场,其中8月中心渔场范围与7月大致相同,部分中心渔场存在向北扩张或向外扩大的趋势; 9月最大中心渔场东移,出现在180°附近,其它渔场较之前有不同程度的扩散或缩小; 10-12月中心渔场较为集中,主要分布在170°～180°E及155°W附近海域,且单位渔区捕捞努力量大于7-9月。3)中心渔场处不同海表温度范围主要与金枪鱼鱼种有关:155°W、20°N夏威夷群岛附近冷舌区,主要分布着大眼金枪鱼(Thunnus obesus)和黄鳍金枪鱼(Thunnus albacares),海表温度为25. 5～27. 5℃; 10°S～10°N暖池区域,主要为大眼金枪鱼和鲣(Katsuwonus pelamis),海表温度为28. 0～30. 3℃;赤道南部冷暖锋面交汇处,主要为长鳍金枪鱼(Thunnus alalunga),海表温度为25. 0～29. 0℃。
Based on the satellite AIS data of tuna longliners and sea surface temperature data in the Western and Central Pacific Ocean from July to December,the locations and variation of the central fishing grounds were studied by the Global Moran’s Index and hot spot analysis.In addition,we confirmed the range of SST in the central fishing grounds.The results were as follows:1)Fish resources exhibited spatial correlation and showed significant concentration distribution pattern.The tuna resource hot spot areas gathered a high proportion of fishing effort,forming the tuna longline fishing grounds in the Western and Central Pacific.2)There were more than one central fishing ground each month.The grounds in July were roughly the same as that in August,except that some had a trend to expand northward or outward.In September the largest fishing ground moved eastward to the area near180°,and other grounds had different degrees of diffusion or shrink than before;from October to December the central fishing grounds were intensively distributed in the Hawaii Islands near170°-180°E and155°W,and the average fishing effort was more than that between July and September.3)Related to different tuna species,the locations and SST of central fishing grounds were in three sections:cold tongue area near Hawaii Islands where SST was25.5-27.5℃,mainly for Thunnus obesus and Thunnus albacares;warm pool area near10°S-10°N where SST was28.0-30.3℃,mainly for Thunnus obesus and Katsuwonus pelamis;the areas in the south of the equator that cold front and warm front intersected where SST was25.0-29.0℃,mainly for Thunnus alalunga.
作者
原作辉
杨东海
樊伟
张胜茂
YUAN Zuo-hui;YANG Dong-hai;FAN Wei;ZHANG Sheng-mao(Key Laboratory of Oceanic and Polar Fisheries, Ministry of Agriculture; East China Sea FisheriesResearch Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China;College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China)
出处
《海洋渔业》
CSCD
北大核心
2018年第6期649-659,共11页
Marine Fisheries
基金
国家自然科学基金项目(31772899)
上海市自然科学基金项目(17ZR1439800)
浙江省海洋渔业资源可持续利用技术研究重点实验室开放课题(2016KF006)
中国水产科学研究院基本科研业务费(2016PT11).
作者简介
原作辉(1994-),男,硕士研究生,研究方向:数据挖掘,渔业GIS。E-mail:rsyuanzh@126.com;通信作者:张胜茂,副研究员。E-mail:ryshengmao@126.com
