作　　者： ; ; ; ; ; ; ;

机构地区： 中国农业部东海与远洋渔业资源开发利用重点实验室上海200090

出　　处： 《南方水产科学》 2014年第2期18-26,共9页

摘　　要： 根据2008年~2012年中西太平洋金枪鱼(Thynnus)围网的渔获生产数据,并结合利用遥感信息技术手段同期获取的海表温度、次表层和温跃层温度、叶绿素等海洋环境数据,分析了围网主要捕获品种渔获量、资源丰度与渔场重心的时空变化及其与主要环境因子之间的关系。结果显示,目前中西太平洋金枪鱼围网渔获量分布在10°N^10°S、140°E^180°E,中心渔场经度重心集中在150°E^165°E,大体走向是由西向东;纬度重心在1°N^3°S,呈现先南后北的走向。渔场主要适温在28~32℃,最适海表温度为29~31℃,次表层50 m,适温为26.84~29.47℃,100 m适温为24.71~28.57℃,温跃层上界深度在54.09~121.49 m,对应的海水温度为27.10~29.18℃;主要渔获产量集中在叶绿素质量浓度0.02~0.35 mg·m-3内,叶绿素质量浓度处于0.04~0.18mg·m-3时渔获产量出现频次最高,为渔场的最适叶绿素质量浓度范围。 According to the fishery production data of the western and central Pacific tuna purse seine from 2008 to 2012, in addition to the main marine environmental data such as sea surface temperature, subsurface and thermocline temperature and chlorophyll ob- tained by remote sensing technology, we analyzed the relationship between fish catches of the main purse seine species, resource a- bundance, time-space changes of fishing ground gravity and the main environmental factors. Results show that tuna purse seine catches distributed in the western and central Pacific from 10°N to 10°S and 140°E to 180°E. The longitude of fishing ground gravity concen- trated from 150°E to 165 °E from west to east. Latitude center concentrated from 1°N to 3°S and presented in the direction of north af- ter south. The optimum temperature for fishing ground ranged from 28 ℃ to 32 ℃, the best sea surface temperature ranged from 29 ℃ to 31 ℃. The suitable temperatures at subsurface depths of 50 m and 100 m were 26. 84 -26. 84 ℃ and 24. 71 -24. 71 ℃, respec- tively. The upper and lower bound of the thermocline depth was 54. 09 N 121.49 m, and the corresponding seawater temperature was 27. 10 -29. 18 ℃. The main fishing production distributed in chlorophyll concentration of 0. 02 -0. 35 mg.m-3. The highest catchfrequency occurred in chlorophyll concentration of 0. 04- 0. 18 mg.m-3 which was the most appropriate chlorophyll concentration range for fishing ground.

关 键 词： 中西太平洋 金枪鱼围网 渔场重心 海表温度 次表层

领　　域： [农业科学] [农业科学]