Kenawy M A
Department of Entomology, Faculty of Science, Ain Shams University, Abbassia, Cairo, Egypt.
J Egypt Soc Parasitol. 1995 Apr;25(1):257-68.
Three colonies of An. sergentii from El Faiyum (Tersa and El Nazlah) and Siwa oasis were maintained for one year under the circulating room conditions to examine the rates of immature development and survival. For each colony, the egg incubation periods and immature developmental periods (P 50 and E 50) were significantly longer at low temperatures (mean = 13.4 degrees C) during winter. Egg hatch rates and survivorships of the different immature stages did not significantly differ among seasons except for Siwa colony where rates of immature survival decreased during summer (mean = 28.5 degrees C). No differences in such estimates were observed among the three colonies. With the exception of Tersa eggs, the developmental velocity (V = 1/period)--temperature relationships were linear (r2 = 0.94-0.98). The temperature thresholds (to) were 8.64 and 7.35 degrees C with thermal constants (K) of 38.61 and 42.74 degree--days (DD) for eggs of El Nazlah and Siwa, respectively. For adult emergence (male or female) of the three colonies, the to's were 8.02-9.41 degrees C and K's were 212.34-223.71, DD required above the to to complete development. The study indicated that seasons of higher temperatures (mean = > 20 degrees C) are optimal for the development and survival of An. sergentii immatures.
来自法尤姆（特尔萨和纳兹拉）和锡瓦绿洲的三个塞氏按蚊群体在循环室条件下饲养了一年，以检查未成熟发育和存活的比率。对于每个群体，冬季低温（平均 = 13.4摄氏度）下的卵孵化期和未成熟发育期（P 50和E 50）明显更长。除了锡瓦群体，不同未成熟阶段的卵孵化率和存活率在不同季节之间没有显著差异，锡瓦群体在夏季（平均 = 28.5摄氏度）未成熟存活率下降。在这三个群体之间没有观察到此类估计的差异。除了特尔萨的卵，发育速度（V = 1/时期）与温度的关系是线性的（r2 = 0.94 - 0.98）。纳兹拉和锡瓦卵的温度阈值（to）分别为8.64和7.35摄氏度，热常数（K）分别为38.61和42.74度日（DD）。对于这三个群体的成虫羽化（雄性或雌性），to为8.02 - 9.41摄氏度，K为212.34 - 223.71，完成发育需要高于to的DD。该研究表明，较高温度（平均 => 20摄氏度）的季节最适合塞氏按蚊未成熟体的发育和存活。
