AGE DISCRIMINATION OF TAKIFUGU OBSCURUS ABE

The characteristics of three kinds of determination materials of Takifugu obscurusAbe,otoliths,vertebra and opercular had been described and compared the similarities and difference and veracity As a result,the otoliths are the best structure of judging age because the annual ring is very evidence and regularity;the vertebra is the better,it is difficultyof measure ;the opercular is only the assistant material1Among the 72 specimens selected to identify the age of fish using three structures,opercular and otoliths provided respectively the lowest (n = 72,62.50 % ) and highest (n = 72,98.61 % ) number of interpretable preparations1Observed ages rangedfrom age 1+to 4+usingotoliths and vertebra,1+to 3+usingopercular1The teeth of Takifugu obscurus Abe also were used for judging the age and we have found out some preparatory result.