A Physical Analysis of the Difference in Ungues of Insects on Types of Habitat
1. Purpose of the research While studying about insects for school club activity, we found that there are differences in several anatomical characters of the insects according their habitats. Especially, the unguis was different as whether the insect lives in water or on land. So we observed the structure of unguis of some insects by microscope, and physically analyze to relate with the habitat of each insect. 2. Procedures First, we read papers and books about insect morphology to study about insect's unguis. Then, we collected samples of Chironomus plumosus(larva), Neuronia regina(larva), and Carbula humerigera. After pretreatment of samples, we put them in the SEM (Scanning Electron Microscope), observed the unguis of each insect and took pictures. 3. Data First, the larva of Chironomus plumosus has prolegs with numberless hooks that has a certain arrangement and the same angle of 90º. They also has several tiny swellings around the hook. Next, the larva of Neuronia regina has pincer-like unguis which were sharp and bend, reminding the shape of a quadratic curve. Lastly, Carbula humerigera has two large, thick pincer unguis, its form same as the of Neuronia regina. The unguis are very sharp and faced towards the land. 4. Conclusions Both the aquatic insects and the terrestrial insects have structures in unguis developed to increase precision on land. Especially, the angle of unguis were all close to 90º. In addition, aquatic insects like the larvas of Chironomus plumosus or Neuronia regina have particular characters increasing friction force according to resist the flow of water.
枯木潛盾機──石氏煙管蝸牛 (Euphaedusa sheridani shihi Chang) 取食策略之研究
When one time we beautified our campus. It made us meet the snails, Euphaedusa sheridani shihi Chang, unexpectedly. Maybe snails make people associate with the holes on vegetables tops in thinking. Do all of the snails make vegetables tops as their food? We compared with the weight of the wood which has been stayed by snails or not. After a week, the weight of the wood which has been stayed by E. sheridani shihi Chang decreased obviously. It showed they also make wood as their food. What do they decompose wood become? First, we used the basic Carbohydrate's detection means to test the eluate of the wood which has been stayed by E. sheridani shihi Chang. However, we found both the eluate of the wood which has been stayed by E. sheridani shihi Chang or not can examine the Pentose out. So next, we plan to use SDS-PAGE to analyze the left enzyme on the wood, and use it to prove whether they secrete enzyme in mouth to decomposed wood or not. In addition, the holes these snails made and the environment are connected. By means of changing light, temperature and humidity to experiment with how much wood can these snails decompose. We found in the dark, about 20℃ and moist environment, they could decompose the wood the most. Finally, the holes they made on the wood also have its ecological niche. They decomposed the wood not only hastened the dissolution of the wood, but also provided the microhabitat for alga, fungi and small bugs.一次綠化校園的活動，製造了我們與石氏煙管蝸牛的邂逅。蝸牛，或許使很多人想到蔬菜上的洞，但真的所有的蝸牛都以蔬菜為食嗎？比對有無蝸牛棲息的兩組木頭，結果一星期之後有蝸牛棲息的木頭重量明顯減少，顯示蝸牛也以木頭為食。那麼牠們把木頭分解成什麼呢？我們先以基本的醣類檢測方法，檢測蝸牛棲息過的木頭表面洗出液，不過發現不管有無蝸牛棲息皆可檢驗出五碳醣，接著預計用SDS 膠體電泳看是否可以分離分析出蝸牛在消化木頭時殘留在木頭上的酵素，以證明蝸牛是否在口腔分泌酵素以分解木頭。至於環境和蝸牛消化木頭的關係，我們藉著改變光線、溫度、溼度等變因進行實驗，發現牠們在陰暗、潮濕、約20℃的環境下可以分解最多的木頭。最後，牠們分解木頭形成的洞也具有其生態意義，不僅加速木頭的分解，也製造了微棲地提供藻類、真菌及小型生物的生存空間。
Salinity effects on Duckweed growth
The purpose of this research was to investigate the most favourable salt concentration that promotes growth in the Lemna minor plant. Lemna minor, commonly known as lesser duckweed, is found growing among other aquatic plants or massed together in still or slow moving fresh water, such as ponds and lakes, in warmer regions around the world.
黑擬蛺蝶(Precis iphita iphita)的生存策略
Beings inherit various morphs and natural ability properties from their genetic parents to adapt to the environment and survive; Precis iphita iphita , for instance, is a best example of it. Although few literatures on Precis iphita iphita is found, through long-term field observation on the food intake, nest building, avoiding predator of immature stage, and living domain, the oviposition, plant preference of the adult, different stages of morphs and changes of behavior can be classified obviously when there are environmental or weather changes. The above can help investigate how they interact and influence with plants. This study aims to record and describe various behaviors and surrounding changes for Precis iphita iphita. 生物為適應環境求取生存，從親代遺傳許多形態、本能；黑擬蛺蝶（Precis iphita iphita） 的生活史就是個很好的例子。雖然文獻報告對黑擬蛺蝶的形態與行為描述不多，但藉由野外 長期實地觀察幼蟲的攝食、築巢、躲避天敵，以及成蝶的領域、產卵、食草選擇，可明顯區 分當環境、氣候產生變化時，黑擬蛺蝶不同蟲期的蟲體都有許多外在行為的改變，可作為探 討其與植物間的交互作用和影響。本研究旨在描述黑擬蛺蝶各種不同的行為與當時環境的狀 態，並將實際觀察所得詳實記載，以供他人比較參考。
吃得多,較會生?不同食物量飼養對蓋斑鬥魚生殖行為之影響
自2004年4月29日至2004年8月30日止，研究不同食物量對於蓋斑鬥魚生殖表現之影響。自臺北縣水產種苗繁殖場取得40尾（北縣種苗場字第0930000192號），分成低、中、次高、與最高四個飼養食物量組（3, 6, 9 ,12 顆飼料/每隻魚），每一種食物量組進行四次重複實驗，每一個實驗箱飼養雌、雄魚一對，控制相同的光週期、溫度、密度等變因。結果顯示食物量為中食量組（6粒/隻）泡巢維持時間最長，與其他三組統計上有顯著差異，而其他生殖表現如雄魚的吐泡巢次數、泡巢間隔時間，以及雌魚產卵次數、產卵間隔時間，和魚卵孵化時間等四組之間皆無明顯差異。因此推測不同飼養食物量的處理對於蓋斑鬥魚生殖行為之影響不顯著。From April 29, 2004 to August 30, 2004, we studied the effects on breeding behavior of Macropodus opercularis in different quantities of food. We got forty fish from the nursery in Taipei County. We breed one male and one female in the tank, and the quantities food was set to low, middle, high, and highest groups (3, 6, 9, 12 granule forage per one fish). Every experiment group repeated three times. We also controlled the same light cycle, temperature, and density. We found that the longest maintenance time per one foam nest was breeding in middle group, and there is a statistically significant difference. But the other results had no statistically significant differences between different groups. Therefore, we inferred that the different allowance food feeding control had no significant effect to breeding behaviors of Macropodus opercularis.