南海深海声学散射层垂直分布和昼夜变化初步研究  

Vertical Distribution and Diurnal Movement of the Deep Scattering Layer in the South China Sea

作　　者：刘世刚[1,2] 汤勇[1] 陈国宝[2,3] 张俊[2,3] 姚壮[1,2] 郭禹[1,2] 刘华波 

机构地区：[1]大连海洋大学海洋科技与环境学院,辽宁大连116023 [2]中国水产科学研究院南海水产研究所,广东广州510300 [3]农业部南海渔业资源环境科学观测试验站,广东广州510300 [4]中国海监威海市文登区大队,山东威海264400

出　　处：《海洋科学进展》2015年第2期173-181,共9页Advances in Marine Science

基　　金：中央级公益性科研院所基本科研业务费专项资金资助项目--南海外海大洋性头足类声学评估技术(2013ZD03)和频差技术在南海外海多鱼种映像差别中的应用研究(2014TS18);国家科技支撑计划项目--南海外海捕捞技术与新资源开发(2013BAD13B06);农业部财政重大专项项目--南海渔业资源调查与评估(NFZX2013);国家财政专项项目--南海海洋捕捞信息动态采集网络(E935)

摘　　要：2013-09利用船载Simrad EK60科学鱼探仪（38kHz）对南海深海声学散射层进行了连续监测,并结合变水层拖网采样分析了其垂直分布和昼夜变化。结果表明,南海深海存在2个明显的声学散射层,特征深度分别为0-100m和350-700m,并且2个散射层间存在较为明显的昼夜垂直移动现象。其随时间变化情况为：16∶00-19∶00,350-700m散射层中的部分生物逐渐向上移动到0-100m散射层;04∶00-07∶00,这部分上升的生物又逐渐移回至350-700m散射层。变水层拖网采样结果发现,白天0-100m散射层内渔获物数量较少,夜间0-100m散射层内渔获物较多,验证了声学映像所检测到的2个散射层间确实存在昼夜移动的现象。The vertical distribution and diurnal movement of the deep scattering layer in the South China Sea were analyzed based on continuous monitoring of shipborne Simrad EK60 scientific echosounder （38 kHz） and biologically samples collected with pelagic trawl in September 2013. The results showed that two deep scattering layers exist in the deep water of the South China Sea and their typical depths are 0-100 m and 350-700 m, respectively. The scattering layers show an obvious diurnal vertical movement： from 16：00 to 19：00, some organisms in the 350-700 m layer move up to the 0-100 m layer; from 04：00 to 07：00, the organisms that once moved up to the 04100 m layer move back into the 350-700 m layer. The sampling results of pelagic trawl also show that, the catches in the 0-100 m scatting layer during daytime are less than during nighttime. This confirms the phenomenon of diurnal movement between the two scattering layers detected by echogram.

关 键 词：南海 深海散射层 垂直分布 昼夜变化 

分 类 号：S932.4[农业科学—渔业资源]