南海中南部中层鱼资源声学密度及时空分布初探
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- 英文论文题名：A preliminary study on nautical area scattering coefficient and distribution of mesopelagic fishes in the entral-southern part of the South China Sea
- 论文作者：张俊 ; 江艳娥 ; 陈国宝 ; 龚玉艳 ; 陈作志
- 英文论文作者：ZHANG Jun ; Jiang Yan'e ; CHEN Guobao ; Gong Yuyan ; CHEN Zuozhi ; Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization ; Ministry of Agriculture ; South China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences
- 年：2016
- 作者机构：农业部南海渔业资源开发利用重点实验室中国水产科学研究院南海水产研究所;
- 论文关键词：中层鱼 ; 密度 ; 时空分布 ; 声学评估 ; 南海
- 英文论文关键词：mesopelagic fishes ; Nautical Area Scattering Coefficient ; spatial-temporal distribution ; acoustical estimation ; South China Sea
- 会议召开时间：2016-11-02
- 会议录名称：2016年中国水产学会学术年会论文摘要集
- 语种：中文
- 分类号：S931
- 学会代码：OGSB
- 会议名称：2016年中国水产学会学术年会
- 会议地点：中国四川成都
- 主办单位：中国水产学会、四川省水产学会
- 学会名称：中国水产学会
- 页数：2
- 文件大小：539k
- 原文格式：D
- 会议级别：全国
摘要
利用Simrad EK60科学探鱼仪(38 k Hz)于2013年春季和2014年春季采集的南沙和中、西沙海域渔业声学数据和中层拖网数据,分析了南海中南部中层鱼密度及其时空分布特征。结果显示,2014年春季中、西沙海域9次中层拖网共捕获和鉴定鱼类和头足类79种,隶属于3纲16目37科60属,其中硬骨鱼纲的种类最多(65种),硬骨鱼纲中巨口鱼科、灯笼鱼科和钻光鱼科的种类最多;南沙海域中层鱼声学密度显著低于中、西沙及邻近海域;2013年春季南沙海域夜间10~200 m和白天200~1000 m声学密度构成没有显著差异,而2014年春季中、西沙海域该值构成有极显著差异;南沙海域及中、西沙白天200~1000 m不同纬度组间中层鱼声学密度构成均有显著差异;南海中南部中层鱼声学密度是(2387±601)m~2/nmi~(-2),基于现存中层鱼的声学目标强度数据并取其均值,推算南海中南部中层鱼资源量是8200±2100万吨。研究表明,南海中南部中层鱼声学密度比全球平均值高约29.2%,可能是我国未来具有开发价值的大宗战略生物资源。
Two acoustical surveys were conducted using Simrad EK60 scientific echosounder(38k Hz split–beam transducers) in the Nansha, Zhongsha and Xisha areas in the spring 2013 and in the spring 2014, and the abundance and distribution were estimated based on acoustic data and mid-water trawl sampling. We identified 79 species fishes and squids belonging to 60 genera, 37 families, 16 orders and 3 classes in the Zhonxigsha area in the spring 2014; OSTEICHTHYES was the most abundant(65 species). Stomiidae, Myctophidae and Gonostomid of OSTEICHTHYES were the most abundant. The Nautical Area Scattering Coefficient(NASC) of mesopelagic fishes in the Nansha area was much lower than that in the Zhonxigsha area. The NASC composition of fishes were insignificantly different between living in 10–200 m at night and 200–1000 m during the day in Nansha area in the spring 2013, but the differences were significant in Zhongsha and Xisha areas in the spring 2014. The NASC composition of fishes living in 200–1000 m during the day for the different latitude scope in Nansha, Zhongsha and Xisha areas presented significant differences. The NASC in the central-southern part of the South China Sea was 2387±601 m~2 nmi~(-2). According to existing mesopelagic fishes target strength parameters and the median value, we estimated the abundance of mesopelagic fishes in the central-southern part of the South China Sea to be 82±21 million tons. The results indicated that the NASC of mesopelagic fishes in the central-southern part of the South China Sea was higher by29.2% than the global average. Mesopelagic fishes, as a major potential strategic fishery resource,has very important developing value in China.
Two acoustical surveys were conducted using Simrad EK60 scientific echosounder(38k Hz split–beam transducers) in the Nansha, Zhongsha and Xisha areas in the spring 2013 and in the spring 2014, and the abundance and distribution were estimated based on acoustic data and mid-water trawl sampling. We identified 79 species fishes and squids belonging to 60 genera, 37 families, 16 orders and 3 classes in the Zhonxigsha area in the spring 2014; OSTEICHTHYES was the most abundant(65 species). Stomiidae, Myctophidae and Gonostomid of OSTEICHTHYES were the most abundant. The Nautical Area Scattering Coefficient(NASC) of mesopelagic fishes in the Nansha area was much lower than that in the Zhonxigsha area. The NASC composition of fishes were insignificantly different between living in 10–200 m at night and 200–1000 m during the day in Nansha area in the spring 2013, but the differences were significant in Zhongsha and Xisha areas in the spring 2014. The NASC composition of fishes living in 200–1000 m during the day for the different latitude scope in Nansha, Zhongsha and Xisha areas presented significant differences. The NASC in the central-southern part of the South China Sea was 2387±601 m~2 nmi~(-2). According to existing mesopelagic fishes target strength parameters and the median value, we estimated the abundance of mesopelagic fishes in the central-southern part of the South China Sea to be 82±21 million tons. The results indicated that the NASC of mesopelagic fishes in the central-southern part of the South China Sea was higher by29.2% than the global average. Mesopelagic fishes, as a major potential strategic fishery resource,has very important developing value in China.
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