Beserra Eduardo B, Fernandes Carlos R M, Ribeiro Paulino S
Depto. de Biologia, Univ. Estadual da Paraíba.
Neotrop Entomol. 2009 Nov-Dec;38(6):847-52. doi: 10.1590/s1519-566x2009000600020.
We focused on the evaluation of the influence that the larval density have on the life cycle, size and fecundity of Aedes aegypti (L.). The bioassays were conducted at 26 + or - 2 degrees Celsius and at 12h light. Five larval densities (200, 500, 750, 1000 and 1250 larvae/l) and two feeding systems (one with a fixed amount of 100 mg of food, and other with an amount of food proportional to the number of larvae/tray) were tested. Egg and larval development time and survivorship, sex ratio, longevity, fecundity and the size of adults were evaluated on a daily basis. The life cycle of A. aegypti was significantly affected by the density when offered 100 mg of food per tray. The period of larval development increased from 8.3 to 37.9 days whereas female fecundity and wing length decreased from 105.7 to 41.8 eggs/female and from 4.6 mm to 3.6 mm, respectively, by changing from a density of 200 to 1250 larvae/l. Significant differences of these variables were not detected when offering 1.9 mg of food per larvae, except for the size of the adults. Females emerged from rearing densities of 1250 larvae/l grew larger, with an average wing length of 5.2 mm.
我们重点评估了幼虫密度对埃及伊蚊生命周期、体型和繁殖力的影响。生物测定在26±2摄氏度、12小时光照条件下进行。测试了五种幼虫密度（200、500、750、1000和1250只幼虫/升）和两种喂食系统（一种固定喂食100毫克食物，另一种喂食量与每个托盘内幼虫数量成比例）。每天评估卵和幼虫的发育时间、存活率、性别比、寿命、繁殖力以及成虫的体型。当每个托盘提供100毫克食物时，埃及伊蚊的生命周期受密度影响显著。幼虫发育周期从8.3天增加到37.9天，而雌蚊繁殖力和翅长分别从105.7枚卵/雌蚊和4.6毫米降至41.8枚卵/雌蚊和3.6毫米，幼虫密度从每升200只变为1250只。当每只幼虫提供1.9毫克食物时，除成虫体型外，未检测到这些变量有显著差异。从每升1250只幼虫的饲养密度羽化出的雌蚊体型更大，平均翅长为5.2毫米。
