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한국 서해 대구, Gadus macrocephalus (Tilesius)의 성장특성
김희용 ( Hee Yong Kim ),김상화 ( Sang Hwa Kim ),임양재 ( Yang Jae Im ),황학진 ( Hak Jin Hwang ),허선정 ( Sun Jing Huh ) 한국어업기술학회 2013 수산해양기술연구 Vol.49 No.3
The age and growth of the Pacific cod, Gadus macrocephalus were investigated using left sagittal otoliths of 682 individuals collected in the West Sea of Korea from January to December 2007. The seasonal changes in the ratio of an opaque zone to interval between annular rings revealed that the narrow translucent parts of the otolith were annual growth rings formed between February and March once a year. The spawning period was December to January and therefore the duration from fertilization to the complete formation of the opaque zone became thirteen months. From the parameters calculated using the average length when the year ring was formed, the estimated von Bertalanffy growth equations were for females and for males when is total length in age t.