Consider the conception of using fluctuating temperature for the warming effect of a herbivorous insect

• Main Authors: Ying-Hsin Chen, 陳穎新
• Other Authors: 郭美華
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/97887609294691476030

碩士 === 國立中興大學 === 昆蟲學系所 === 98 === For ectotherms, global climate change and ecological effects caused the growth the most important factor is temperature, the impact of climate warming is an important issue. Amount of researches about the relationship between insects and temperature to set constant temperature treatment of many ways to discuss, but the constant temperature does not correctly reflect the true circumstances of the natural environment for the biological impact of temperature changes. Experiment will be divided into constant temperature and fluctuating temperature treatments, observed under the same average temperature difference between the two treatments. In this study, Myzus varians rear at 8 different temperatures on Clematis gouriana. According to climate data of Ilan in July 2009, adjust the average temperature corresponding to the same constant temperature of the variable temperature treatments. The longest developmental time for nymphs was 29.1 days at 10℃ of the longest, and shortest developmental time was 7.27 days at 30℃. The adult longevity was 66.33 days at 10℃ while the minimum of longevity was 18.67 days at 30℃. The adult fecundity at 20℃ was maximum (42.03 offspring / female) and minimum at 30℃ (4.73 offspring / female). Under fluctuating temperatures between 25℃ to 32.5℃ the nymphs on average 28.8℃ was the longest development time 9.00 days, while at average 25℃ with the shortest development time 7.97 days. The adult at 25℃ with a maximum longevity 23.27 days , while the shortest longevity at average 30℃ with 13.47 days. The adult fecundity at average 25℃ was maximum value (10.2 offspring / female) and minimum at average 30℃ (0.97 offspring / female). Furthermore, at average 30℃ the population growth was negative growth. From analysis of variance results show that constant temperatures and fluctuating temperatures were significant different, and in case of elevated temperature, fluctuating temperature treatments than in constant temperature should be set early response to higher temperatures, so temperature is a critical cues to the result, will increase insects growth, development and affect various physiological responses. According to the control treatments, constant temperature and fluctuating temperature treatments have different expectations, and this means that in order to set temperature and the prediction of climate warming may underestimate their seriousness.