Journal of Tropical Oceanography >
Relationship between spatial-temporal distribution of Scomber australasicus and environmental factors in the Arabian Sea
Copy editor: SUN Shu-jie
Received date: 2018-10-16
Request revised date: 2019-02-27
Online published: 2019-07-21
Supported by
The Special Funds of Basic Research of Central Public Welfare Institute((GZH201100205、DD20160138);)
National Natural Science Foundation of China((91855101、41876052).)
Copyright
Satellite-based oceanographic data of sea surface temperature (SST), sea surface chlorophyll-a concentration (Chla), sea surface current (SSC), and sea surface height (SSH) together with purse seine catch data of Chinese purse fishing boats during 2016-2017 were used to investigate the relationship between the fishing grounds of spotted mackerel (Scomber australasicus) and environmental factors in the Arabian Sea. Empirical cumulative distribution function and high catch data analyses were used to calculate preferred ranges of the four oceanographic factors. Results indicated that average CPUE (catch per unit effort) decreased from February to May, and then increased until December. The purse seine fishing season is mainly during the northeast monsoon from October to March of the following year. The gravity of fishing grounds is distributed between 59°-62°E and 13°-17°N, and shows monthly variation, mainly presenting a southwest movement trend. The CPUEs were observed along the high value area of SSC in the north-south direction, and located between the high and low value areas of SSH. The optimum ranges of SST, Chla, SSC, and SSH were 26-28℃, 0.15-0.5 mg·m -3, 0.05-0.25m·s -1s, and 0.2-0.35 m, respectively.
YANG Shenglong , FAN Xiumei , TANG Fenghua , CHEN Tianfei , FAN Wei . Relationship between spatial-temporal distribution of Scomber australasicus and environmental factors in the Arabian Sea[J]. Journal of Tropical Oceanography, 2019 , 38(4) : 91 -100 . DOI: 10.11978/2018106
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