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- W2352617923 abstract "Scomber japonicus is one of the main pelagic fish in the East China Sea and Yellow Sea. It has maintained high yield in recent years. The central East China Sea is one of the major spawning grounds of S. japonicus. To understand the reproductive strategy of S. japonicus under high fishing pressure, we studied the age structure, the gonadosomatic index(GSI) and the fecundity of S. japonicus spawning stocks that were sampled in the central East China Sea in springs of 2010-2012. The data was analyzed with Microsoft Office Excel and SPSS 18.0 statistical software. The current age structure of S. japonicus spawning stocks was from 1 to 5 years, and the dominant age range was from 2 to 4 years. The absolute fecundity varied between 24770 and 734684 grains, with an average of 145575±10067 grains. The relative fecundity to body weight ranged from 175 to 1404 grain/g, with an average of(524±24) grain/g. The relative fecundity to fork length ranged from 102 to 2070 grain /mm, with an average of(483±29) grain/mm. ANOVA analysis showed that there were significant differences in GSI(P0.05), the absolute fecundity(P0.01), and the relative fecundity to fork length(P0.05) between different fork length groups, but there was no difference in the relative fecundity to body weight(P0.05). Multiple stepwise linear and non-linear regression analysis showed that the absolute fecundity was closely related to the body height and liver weight. In response to the high fishing pressure, S. japonicus maintain the continuation of stocks by adopting a variety of strategies including earlier sexual maturity age, decrease in the smallest maturity fork length, smaller maturation egg diameter, increase in fertility, etc. In order to have sustainable supply of S. japonicus in the future, we suggest that the fishery administrative department should establish protection zones in spawning grounds and non-fishing periods in the central East China Sea." @default.
- W2352617923 created "2016-06-24" @default.
- W2352617923 creator A5011092998 @default.
- W2352617923 date "2014-01-01" @default.
- W2352617923 modified "2023-09-23" @default.
- W2352617923 title "The Fecundity of Chub Mackerel(Scomber japonicus) Spawning Stocks in the Central East China Sea" @default.
- W2352617923 hasPublicationYear "2014" @default.
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