黑擬蛺蝶(Junonia iphita iphita)為台灣地區常見的蛺蝶，其幼蟲具有築巢行為，但文獻中對其幼蟲行為的描述極少，因此本實驗探討黑擬蛺蝶幼蟲在野外的族群變化與環境之關係，並研究幼蟲築巢行為，以探討其適應環境的生存策略。首先於室內及恆溫生長箱中飼養幼蟲，以建立其生活史基本資料，並於野外統計各齡期幼蟲在不同植物上的數量變化及築巢行為的差異，以探討不同環境因素對幼蟲築巢之影響。由實驗結果得知，黑擬蛺蝶生活史短，可取食多種爵床科(Acanthaceae)之植物，其寄主植物除文獻所紀錄之台灣馬藍(Strobilanthes formosanus)及賽山藍(Blechum pyramudatum)等外，也取食大安水蓑衣(Hydrophila pogonocalyx)、無花水蓑衣(Hygrophila violacea)、易生木(Hemigraphis repanda)及翠蘆利(Ruellia brittoniana)等。黑擬蛺蝶幼蟲野外族群波動與溫溼度及雨量等環境因子並無直接關係。黑擬蛺蝶一年發生多世代且有世代重疊情形，世代波動與四季律動關係不明顯，顯示黑擬蛺蝶對環境的適應力大。黑擬蛺蝶幼蟲利用築巢以適應環境變化，應是其幼蟲良好的生存策略。且幼蟲在強風及光線強的環境下築巢率增加，降雨時則減少。Junonia iphita iphita belongs to Nymphalidae（Lepidoptera）. They can be found easily in the wilderness of Taiwan. Its larva shows nest-making behavior. However, there is little literature documenting the behaviors of its larva. Therefore, the purpose of this research is to investigate the relationship between the quantities of Junonia iphita iphita’s larvae and its natural habitat, to research its nesting behaviors, and to investigate its survival strategies to adapt to the environment. I started by raising larvae in a growth chamber under a controlled temperature in order to obtain its initial information regarding its life history. In the field, I documented the numbers and the changes of larvae at each stage on different host plants and recorded the differences in its nest-making behavior in order to find out which environment factors influence the nest-making of Junonia iphita iphita’s larvae. These experiments concluded that the life history of larvae is short. The immature intaking habit showed that the larva takes various plants of the Acanthaceae. In addition to the host plantsmentioned in the literature, such as Strobilanthes formosanus, and Blechum pyramidatum, Junonia iphita iphita’s larvae also live by Hydrophila pogonocalyx, Hygrophila violacea, Hemigraphis repanda, and Ruelba brittoniana, which were not listed in the literature. Through experiments, I discovered that there is no direct correlation between the population fluctuations of larvae and it’s enviroment including factors such as temperature, humidity or rainfall. Junonia iphita iphita can produce multi-generations in a year accompanying generation overlapping. There is also no obvious correlation between the generation fluctuations and changing seasons, showing that larvae can easily adapt to the environment. Junonia iphita iphita’s larvae adapt themselves to the different environments by nest-making which should be a good survival strategy. Besides, the rate of nest-making increases when larvae are under strong winds and strong lights and decreases when the rain falls.
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