Studies on the Ecological Distribution and the Mating System of Insects in Forest Ecosystem.
Grant-in-Aid for international Scientific Research
|Allocation Type||Single-year Grants|
|Research Institution||Saga University|
HIGASHI Kazunori College of Liberal Arts, Saga University, 教養部, 教授 (50089918)
朱 耀沂 国立台湾大学, 植物虫害研究所々長, 教授
UBUKATA Hidenori Department of Science Education, Kushiro College, Hokkaido University of Educati, 教育学部, 助教授 (60125367)
KIMOTO Shinsaku Department of General Education, School of Medicine, Kurume University, 医学部, 教授 (20080963)
CHU Yau-i Department of Plant Pathology and Entomology, National Taiwan University.
|Project Period (FY)
Completed(Fiscal Year 1990)
|Budget Amount *help
¥2,000,000 (Direct Cost : ¥2,000,000)
Fiscal Year 1990 : ¥2,000,000 (Direct Cost : ¥2,000,000)
|Keywords||Forest ecosystem / Ecological distribution / Mating system / Chrysomelidae / Odonata / Territory / Habitat segregation / Aggressive behavior|
Preliminary study on the ecological distribution of insects in Taiwan was performed for Chrysomelidae and odonata. The sampling areas were chosen according to altitude as follows ; Shinting (altitude : 250m), Chuchi (300m), Neishuangchi (300m), Wulai (350m), Sun Moon Lake (760m), Nanshanchi (800m), Lushan Spa (1200m), Fenchihu (1400m), Sungkang (2000m), Alishan (2300m).
In Chrysomelidae 95 species (including subspecies) and 842 specimens were collected in these areas. As Chrysomelidae is divided into 17 subfamily, each of the specimens was identified in species of 17 subfamily. The results show that dominant species in Taiwan belong to Galerucinae and Alticinae, and as for species ratio of Aliticinae and Galerucin ae the former increases in accordance with the altitude.
In odonata 38 species (including subspecies) and 243 specimens were collected. One of the future problems is that nine species of genus Orthetrum inhabit in Taiwan and also the same number of species inhabit in Japan. As
Japanese Islands distributes widely from the north to south, the degree of temperature is also in wide-condition. Therefore, each species can establish in their suitable area. As Taiwan is small island, it may be difficult for them to obtain their habitat. To analyze the mechanism of habitat segregation it is very important to observe the behavior of these species in detail.
Mating system of odonata was preliminarily observed for Euphaea formosa (Euphaeide). The aggressive behaviours of E. yayeyamana in iriomote island are divided into five patterns. Those patterns were able to adopt to E. formosa. The characteristic of behavior of E. formosa and E. yaeyamana was to shake a body to the right and left during aggression. It is supported from the observations that aggressive behavior is related with phylogenetic evolution. As for E. formosa, mating strategy was territory-holding. However, it was observed the group-waiting without holding territory when the number of males in oviposition site was very high. Although the mating system of E. formosa and E. yayeyamana resembles in each other, more detailed observations is needed for the conclusion. Less
Research Output (6results)