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Abstract ▼ AI-Helper

Microstructure of otoliths and early growth in total length of laboratory-reared river puffer, Takrifugu obscurus were observed from 1 to 63 days after hatching. The total length of Takifugu obscurus was 3.09${\pm}$0.02 mm, 4.96${\pm}$0.24 mm, 5.39${\pm}$0.42 mm,9.13...

Microstructure of otoliths and early growth in total length of laboratory-reared river puffer, Takrifugu obscurus were observed from 1 to 63 days after hatching. The total length of Takifugu obscurus was 3.09${\pm}$0.02 mm, 4.96${\pm}$0.24 mm, 5.39${\pm}$0.42 mm,9.13${\pm}$0.59 mm, 10.78${\pm}$0.96, 16.40${\pm}$2.31 mm, 30.49${\pm}$l.53 mm in 1, 10, 20, 30, 34, 43, 63 days respectively. The mean radius of otoliths was 14.20${\pm}$1.21 $\mu\textrm{m}$ in 1 day, 31.06${\pm}$2.31 $\mu\textrm{m}$ in 10 days,57.19${\pm}$6.19 $\mu\textrm{m}$ in 20 days,127.13${\pm}$13.13 $\mu\textrm{m}$ in 34 days,190.79${\pm}$17.08 $\mu\textrm{m}$ in 43 days and 281.85${\pm}$23.81 $\mu\textrm{m}$ in 63 days after hatching. Growth of otoliths were similar to the growth pattern in total length during 20-63 days after hatching. Hatch mark was distinguished with other growth increments and within a hatch mark two or three increments were observed. The number of growth increments was correlated with the days after hatching between 20 and 63 days after hatching.

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