Mark-release-recapture study on hibitat selection of aedine mosquitecs

1998 Fiscal Year Final Research Report Summary

• Project/Area Number: 08670281
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: 寄生虫学(含医用動物学)
• Research Institution: Nagasaki University
• Principal Investigator: TSUDA Yoshio Nagasaki University Institute of Tropical Medicine Medical Entomology Lecturer, 熱帯医学研究所, 講師 (20207393)
• Co-Investigator(Kenkyū-buntansha): SUGIYAMA Akira Nagoya Women's University Demestic Science Professor, 短期大学部家政学科, 教授 (30196761) ; TAKAGI Masahiro Nagasaki University Institute of Tropical Medicine Medical Entomology Professor, 熱帯医学研究所, 教授 (60024684)
• Project Period (FY): 1996 – 1998
• Keywords: Aedes albopictus / Aedes riversi / Habitata Selection / Mark-release-recapture / Ishigaki Island

Research Abstract

Dry ice trap collections of adult mosquitoes were conducted at 16 collection sites at Nosoko-Urasoko area on Ishigaki island, Japan. Vegetation of each coilection site was recorded by photographs and thc proportions of 6 components (soil, stone, rock, fallen leaves, root, and fresh leaves) and canopy coverage were calculated by a scoring method. These vegetation data were analyzed by Principal Component Analysis and 3 principal components were suggested to be useful to characterize the vegetation structure of each collection site.
The relationship between the 3 principal components and the number of collected adults at each site were analyzed for Aedes albopictus and Ac. riversi. The results suggested (1) density of Ac. riversi was higher at collection site with high score of the 1^s^t principal component suggesting the preference to the inside of forest, (2) comparing to Ac. riversi, density of Ac. albopictus was higher where the score of the 2^n^d and 3^r^d principal components of the collection site were higher suggesting the preference to forest areas exposed to sun shine, like forest fringe, (3) the width of distribution of Ac. albopicws along the 2^n^d and 3^r^d principal components was narrower than Ac. riversi.
Mark-release-recapture experiments were conducted to predict the movement of released Ae. albopictus and Ac. riversi in a forest area based on the observed difference in habitat selection. The 97.1% of variation in number of recaptured Ac. rivcrsi among 10 recapture points was explained by the 1^s^t and 3^r^d principal components and the distance from release point, whereas only 6.7% of the variation was explained in Ac. albopicrus.