• Kasem Kongnirundonsuk คณะวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยราชภัฎบ้านสมเด็จเจ้าพระยา
Keywords: sexual dimorphism, sex ratio, springtail


Generally, size and shape of the body of animals were used to determine sexes. Under laboratory conditions at 25 – 28 0C, rearing springtail in the plastic bottle containing plaster of Paris-charcoal substrate was established to investigate the sexual dimorphism which was in agreement with hypothesis. It was found that the both sexes of Xenylla sp. were separated by the body size and female body size was longer and bigger than male. In addition, the pattern of pigmentation on the body and color body were as the main characteristics to separate sexes in Xenylla sp. Female was bright yellow whereas male of the same age had darker body due to distribution of pigments. For sex ratio, it was found that an apparent predominace of males over female in the ratio of 1.63: 1, respectively. Based on this study, it indicated that Xenylla sp. was dioecious and non parthenogenitic species and possible to use the combination of body size and color to determine the sexes.


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How to Cite
Kongnirundonsuk, K. (2019). SEXUAL DIMORPHISM AND SEX RATIO OF SPRINGTAIL XENYLLA SP. ife ciences and nvironment ournal, 20(2), 248-255. etrieved from
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