Abstract
A closely associated set of characteristics was analyzed using both classical and truss dimensions to discriminate sexual dimorphism between spawning season and non spawning season in grass puffer, Takifugu niphobles. In non-spawning season, 1×10/Ls of classical dimension was significantly different between male and female (P0.05). In spawning season, 1×9/Ls and 1×10/Ls of classical dimension, 3×8/Ls, 3×9/Ls, 3×10/Ls, 4×8/Ls, 4×9/Ls and 8×9/Ls of truss dimension and 7×9/HL of head part dimension were significantly different between male and female (P0.05). The results of this study may be useful as basic information of other fish species to compare the change of sexual dimorphism between spawning season and non spawning season.
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