水产学报2018，Vol.42Issue(4)：544-556,13.DOI:10.11964/jfc.20160910533
海南陵水湾口海域不同季节鱼类资源声学探查
The acoustic survey of fisheries resources for various seasons in the mouth of Lingshui Bay of Hainan Island
摘要
Abstract
Lingshui Bay is a lagoon harbor located in the southeast of Hainan Island, and it is the focus of the mar-ine development zone in Hainan Province, China. In recent years, with the development of coastal marine aquacul-ture, offshore coastal waters ecological environment has been influenced to a certain extent so that the community structure and diversity of fisheries resources have changed. How to effectively monitor the fisheries resources in species composition and quantity change has become an important problem to be solved. In order to know the background conditions of fishery resources in Lingshui Bay, Hainan Province, four acoustic investigations were conducted with portable split beam scientific echosounder (Simrad EY60, Norway) from November 2014 to Janu-ary 2016 for various seasons. The structure composition of fisheries resources, number density, biomass density and spatial distribution in the survey sea area were investigated and estimated according to the use of echo integra-tion method and trawl sampling. As a result, a total of captured nectons and benthic invertebrates were 86 species, of which the average number density and biomass density of 55 kinds of acoustic assessment species were 9.34×105ind/km2and 5.08 t/km2respectively in November 2014. The sum of captured nectons and benthic inver-tebrates were 114 kinds, of which the average number density and biomass density of 63 kinds of acoustic assess-ment species were 1.12×105ind/km2and 0.93 t/km2respectively in August 2015. A total of captured nectons and benthic invertebrates were 105 species, and the average number density and biomass density of 55 kinds of acous-tic estimation species were 0.16×105ind/km2and 0.32 t/km2respectively in January 2016. In May 2015, the sum of captured nectons and benthic invertebrates were 56 species, including 34 kinds of acoustic assessment species. Fish echo was dominantly distributed in 30 m shallow depth layer in November 2014 and August 2015, and mainly focused on 10 m to 20 m layer in May 2015. In January 2016, fish echo was mainly distributed in 20 m shallow depth layer and the echo in 20 m to 30 m water layer is slightly greater than half of 0 m to 10 m layer or 10 m to 20 m layer. Single target strength in the survey area was mainly less than –58 dB of small individual fish. Single tar-get strength tended to increase with the increasing water depth, and the individuals whose target strength were greater than –50 dB were entirely distributed under 10 m depth layer.关键词
渔业资源/声学评估/时空分布/陵水湾Key words
fisheries resources/acoustic estimation/spatial-temporal distribution/Lingshui Bay分类
农业科技引用本文复制引用
李斌,陈国宝,于杰,王东旭,郭禹,王志超..海南陵水湾口海域不同季节鱼类资源声学探查[J].水产学报,2018,42(4):544-556,13.基金项目
公益性行业(农业)科研专项(201403008) （农业）
农业财政项目—南海海洋捕捞信息动态采集网络(640) （640）
国家科技支撑计划(2013BAD13B06) （2013BAD13B06）
农业部财政重大专项(NFZX2013)Special Fund for Agro-scientific Research in the Public Interest (201403008) （NFZX2013）
China National Finance Special Project “Dynamic Acquisition about Information of Oceanic Fish Catch in South China Sea (640)” （640）
China Ministry of Science and Technology under Grant (2013BAD13B06) （2013BAD13B06）
Financial Fund of the Ministry of Ag-riculture (NFZX2013) （NFZX2013）
