동해안 도루묵, Arctoscopus japonicus의 연령과 성장
Age and growth of the sandfish, Arctoscopus japonicus in the East Sea of Korea
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초록
The age and growth of the sandfish, Arctoscopus japonicus were investigated from samples of the eastern sea danish seine and gill net fishery in the East Sea of Korea from February, 2004 to December, 2007. Ages were determined from annuli in otoliths and annuli were formed between December and February once a year. Also, the main spawning period was estimated to be between December and January, thus rings were considered to be annual marks. For the relationship between fork length and total weight, a multiplicative error structure was assumed because variability in growth increased as a function of the length. The relationship between fork length and total weight were TW=0.0083FL3.01(R2=0.966) for female and TW=0.0079FL3.04(R2=0.969) for male. The variability in growth was constant as a function of age, revealing an additive error structure. The von Bertalanffy growth parameters estimated by a non-linear method were L∞=31.6cm, K=0.266/year, t0=-0.835 years for female and L∞=27.7cm, K=0.273/year, t0=-0.806 years for male. Growth at age between male and female had a significant difference(P<0.001).
Abstract
The age and growth of the sandfish, Arctoscopus japonicus were investigated from samples of the eastern sea danish seine and gill net fishery in the East Sea of Korea from February, 2004 to December, 2007. Ages were determined from annuli in otoliths and annuli were formed between December and February once a year. Also, the main spawning period was estimated to be between December and January, thus rings were considered to be annual marks. For the relationship between fork length and total weight, a multiplicative error structure was assumed because variability in growth increased as a function of the length. The relationship between fork length and total weight were TW=0.0083FL3.01(R2=0.966) for female and TW=0.0079FL3.04(R2=0.969) for male. The variability in growth was constant as a function of age, revealing an additive error structure. The von Bertalanffy growth parameters estimated by a non-linear method were L∞=31.6cm, K=0.266/year, t0=-0.835 years for female and L∞=27.7cm, K=0.273/year, t0=-0.806 years for male. Growth at age between male and female had a significant difference(P<0.001).
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