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Directional selection by termites at a branching node created by a ballpoint pen
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  • Directional selection by termites at a branching node created by a ballpoint pen
  • Directional selection by termites at a branching node created by a ballpoint pen
저자명
Sim. Seungwoo,Ku. Sook Jung,Lee. Sang-Hee
간행물명
Journal of Asia-Pacific entomology
권/호정보
2012년|15권 3호|pp.447-450 (4 pages)
발행정보
한국응용곤충학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Subterranean termites excavate complex underground tunnels for foraging. Most tunnels comprise primary and secondary tunnels. Tunnels originating from the nest are called primary and those branching from the primary tunnels are named secondary tunnels; tertiary and quaternary tunnels are rarely observed. During foraging, termites may thus encounter a considerable number of tunnel-branching nodes. Directional selection at such a node is likely correlated to tunnel-growth activity because tunnels containing more termites have a higher probability of growth. In this study, we investigated how termites select the direction of movement at an artificially-designed branching node, by making chemical trails on filter paper, drawing lines using a ballpoint pen which contained the chemical substance that induces the termite to follow trails. The trails consisted of two lines: straight and branching. The branching line was drawn from the center of the straight line at an angle ${ heta}$ ($10^{circ}$, $20^{circ}$, ${cdots}$, $90^{circ}$). We then calculated the ratio of the directional selection as $r=N_s/N_b$, where $N_s$ and $N_b$ represent the number of straight and branching tunnels selected, respectively. The values of r were statistically classified into three groups based on the angle of the branching trail, as follows: $10^{circ}{leq}{ heta}{leq}20^{circ}$, $30^{circ}{leq}{ heta}{leq}60^{circ}$, and $70^{circ}{leq}{ heta}{leq}90^{circ}$. Our paper briefly discusses the underlying mechanisms of the experimental results.