Hydroacoustic studies on the commercially important squid Sthenoteuthis oualaniensis in the South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Hydroacoustic studies on the commercially important squid Sthenoteuthis oualaniensis in the South China Sea
	Zhang Jun; Chen Zuo-zhi; Chen Guo-bao; Zhang Peng; Qiu Yong-song; Yao Zhuang
刊名	FISHERIES RESEARCH
	2015
卷号	169 页码:45-51
关键词	Sthenoteuthis oualaniensis Squid Fishery acoustics Target strength South China Sea
通讯作者	zkexin0901@126.com
中文摘要	Knowledge of target strength (TS) is essential for accurate assessment of fish abundance using acoustic methods. The in situ TS (dB) of purpleback flying squid Sthenoteuthis oualaniensis in the South China Sea was measured with 70 and 120 kHz split-beam echosounders. Biological samples were collected using a light falling-net with a valid working depth of 50 m. Acoustic data sets in which S. oualaniensis contributed more than 90% of the total catch by number were selected to analyse in situ TS and determine relationships between TS and squid mantle length (ML). In situ TS increased with squid density when density was greater than a cut-off point, indicating a bias from accepting multiple targets at high squid density. At 70 kHz the TS to ML of squid was: TS70 (kHz) = 19.13 log ML - 77.84 (n = 9, R-2 = 0.8782, ML: 7.5-25 cm); at 120 kHz the TS to ML of squid was: TS120 (kHz) = 26.68 log ML - 88.00 (n = 9, R-2 = 0.8521, ML: 7.5-25 cm). This study provides new data for improving the acoustic abundance estimation of squid S. oualaniensis, and may be a useful reference for TS estimation of other squid species. (C) 2015 Elsevier B.V. All rights reserved.
学科主题	Fisheries
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/14927]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Zhang Jun,Chen Zuo-zhi,Chen Guo-bao,et al. Hydroacoustic studies on the commercially important squid Sthenoteuthis oualaniensis in the South China Sea[J]. FISHERIES RESEARCH,2015,169:45-51.
APA	Zhang Jun,Chen Zuo-zhi,Chen Guo-bao,Zhang Peng,Qiu Yong-song,&Yao Zhuang.(2015).Hydroacoustic studies on the commercially important squid Sthenoteuthis oualaniensis in the South China Sea.FISHERIES RESEARCH,169,45-51.
MLA	Zhang Jun,et al."Hydroacoustic studies on the commercially important squid Sthenoteuthis oualaniensis in the South China Sea".FISHERIES RESEARCH 169(2015):45-51.