The size-sex relationship and sexual differences of six Arisaema species native to Japan were investigated. The size-sex relationship showed almost the same pattern in all species. When the plant was small in size, the sex expression was male, and sex expression changed from male to female as the plant grew larger. Male ratios decreased rapidly around a critical size, but this critical size differed from one species to another.

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Design : non-obese Japanese children 73 boys and 57 girls from Kikugawa, Hamamatsu were included. Subjects were divided into three groups based on age: group A years , group B years , and group C years. Boys had an age-dependent increase in visceral fat, but girls did not. Conclusions : In non-obese Japanese children, there are significant differences in visceral and subcutaneous fat amounts by age and sex.

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