Gonzalez Paula V, González Audino Paola A, Masuh Héctor M
J Med Entomol. 2016 Mar;53(2):268-72. doi: 10.1093/jme/tjv189.
In mosquitoes, location of suitable sites for oviposition requires a set of visual, tactile, and olfactory cues that influences females before laying their eggs. The ability of gravid females to distinguish among potential oviposition sites that will or will not support the growth, development, and survival of their progeny is critical. Aedes aegypti (L.) and Aedes albopictus (Skuse) share ecological niches, being highly competitive in larval stage. We studied the oviposition behavior of both species in the presence of larvae of one or the other species (heterospecific or conspecific larvae). The number of eggs laid by gravid females on oviposition sites (water with different or the same species of Aedes larvae) were compared. The presence and density of heterospecific or conspecific larvae had a positive or negative effect on the ovipositional responses, measured as an oviposition activity index. For both species, the oviposition was not affected by heterospecific larvae with densities between 10 and 100 larvae in water, but a strong attractant behavior was observed for a density of 500 larvae in water. For Ae. albopictus in the presence of larvae of the same species (conspecific oviposition), we observed an attractant effect for larvae density of 10 but not for 100 or 500 larvae in water. Instead, for Ae. aegypti, we observed attraction only for 100 larvae, not for 10 or 500 larvae. Results presented here provide an additional insight about oviposition behavior responses of gravid females in the presence of conspecific and heterospecific larvae in breeding sites.
在蚊子中，寻找合适的产卵地点需要一系列视觉、触觉和嗅觉线索，这些线索在雌蚊产卵前对其产生影响。怀孕雌蚊区分哪些潜在产卵地点能够或不能支持其后代生长、发育和存活的能力至关重要。埃及伊蚊（L.）和白纹伊蚊（Skuse）共享生态位，在幼虫阶段竞争激烈。我们研究了这两种蚊子在存在另一种蚊子幼虫（异种或同种幼虫）的情况下的产卵行为。比较了怀孕雌蚊在产卵地点（含有不同或相同种类伊蚊幼虫的水）上产下的卵的数量。异种或同种幼虫的存在和密度对产卵反应有正向或负向影响，产卵反应以产卵活动指数衡量。对于这两种蚊子来说，水中密度在10至100只幼虫之间的异种幼虫不会影响产卵，但当水中幼虫密度为500只时，会观察到强烈的吸引行为。对于白纹伊蚊，在存在同种幼虫（同种产卵）的情况下，我们观察到水中幼虫密度为10时有吸引作用，但密度为100或500只时没有。相反，对于埃及伊蚊，我们仅观察到100只幼虫有吸引作用，10只或500只幼虫则没有。此处呈现的结果为繁殖地中存在同种和异种幼虫时怀孕雌蚊的产卵行为反应提供了更多见解。
