The Microhabitat of Pupae in Troides aeacus and Its Applications in Road Engineering
Date Issued
2007
Date
2007
Author(s)
Liang, Pei-Shih
Abstract
Animal populations and movements may be quite different in “roadsides” or “verges” from their original habitat. Roads with vehicles cause prodigious numbers of insects, especially dragonflies and butterflies, killed. In addition, roads appear as one of the most important effects on butterfly habitat fragmentation. However, it has been suggested that well managed roadsides can be created as habitats or corridors for several butterfly species efficiently. Papilionidae Troides aeacus is one of protected species in Taiwan. When the Troides aeacus’ larvae are going to pupate, they will look for sheltered, safe spots to stay and find suitable places to attach themselves.his paper takes the Niu-Pei-Pei’s Butterfly Garden in Taipei County as a field experiment site to study the microhabitat of pupae. 30 pupae are chosen randomly, at the same time, several factors, such as height, wind velocity, light, sound level, distances to roads, roads widths, and distances to their larval food plants, are measured in the area each pupa selects. Depending on the experiment, pupae have high occurrence in places with low wind velocity or low sunshine percentage. Besides, they would like to leave their larval food plants, but not far. Moreover, the buffer zone from the edge (roads) of their habitat is still needed. One pupa is taken from the butterfly garden to do the wind tunnel testing in the laboratory. According to the result, the pupal movement under different wind velocity is described. The vibration of a pupa is described by taking pictures and dimensioning in AutoCAD 2005. The amplitude is increasing while the wind velocity is enlarging. The period, nevertheless, is decreasing. The minimum period cannot be derived yet.
Subjects
butterfly
road
microhabitat
pupa
wind velocity
vibration
Type
thesis
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