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Does the Presence of Other Egg Rafts and Conspecific Larvae Encourage Oviposition by the Mosquito, Culex sitiens (Diptera: Culicidae)?
Journal of Insect Behavior ( IF 1 ) Pub Date : 2021-01-06 , DOI: 10.1007/s10905-020-09762-w
Derek Roberts

Mosquitoes include many major disease vectors and are often controlled in their aquatic larval stage, since they are living in defined habitats. However, non-chemical methods of control are influenced by the female oviposition behavior, and this is affected by many factors. Many mosquito species choose to oviposit on water containing egg raft pheromones (which have thus been used in control), showing another female has selected that pool as being best. However, Culex sitiens did not respond chemically to water previously containing egg rafts, but unlike most species, did strongly respond visually to artificial black egg rafts floating on the surface. Oviposition increased as the number of artificial egg rafts increased up to six, but more rafts gave no further increase. However, even nine egg rafts had no repellent effect, despite the high probability of larval overcrowding and thus starvation. Altering the pattern with which five rafts were interconnected and also altering the size of individual rafts seemed to show that the mosquitoes were responding more to total raft area rather than number. The presence of either 2nd instar or 4th (final) instar conspecific larvae in the water can be detected chemically but did not influence oviposition, either positively or negatively. Conspecific larvae show the water is suitable for oviposition, but they are competitors for the available food and so many studies have shown especially older larvae to be repellent to oviposition. Culex sitiens was thus not responding chemically to either eggs or larvae but unusually had a visual response.

中文翻译:

其他卵筏和同种幼虫的存在是否会促进蚊子、库蚊(双翅目:蚊科)的产卵?

蚊子包括许多主要的疾病媒介,并且通常在其水生幼虫阶段受到控制,因为它们生活在确定的栖息地中。然而,非化学控制方法受雌性产卵行为的影响,且受多种因素影响。许多蚊子物种选择在含有卵筏信息素(因此已被用于控制)的水中排卵,这表明另一只蚊子选择了最好的水池。然而,库蚊对以前含有卵筏的水没有化学反应,但与大多数物种不同,它们对漂浮在水面上的人造黑色卵筏在视觉上有强烈反应。随着人造卵筏的数量增加到六个,产卵量增加,但更多的卵筏没有进一步增加。然而,即使是九个蛋筏也没有驱蚊效果,尽管幼虫过度拥挤并因此饥饿的可能性很高。改变五个筏子相互连接的模式并改变单个筏子的大小似乎表明蚊子对总筏子面积而不是数量的反应更多。可以通过化学方法检测水中 2 龄或 4 龄(最终)同种幼虫的存在,但不会对产卵产生积极或消极的影响。同种幼虫表明水适合产卵,但它们是可用食物的竞争者,因此许多研究表明,特别是年龄较大的幼虫排斥产卵。因此,库蚊对卵或幼虫没有化学反应,但有异常的视觉反应。改变五个筏子相互连接的模式并改变单个筏子的大小似乎表明蚊子对总筏子面积而不是数量的反应更多。可以通过化学方法检测水中 2 龄或 4 龄(最终)同种幼虫的存在,但不会对产卵产生积极或消极的影响。同种幼虫表明水适合产卵,但它们是可用食物的竞争者,因此许多研究表明,特别是年龄较大的幼虫排斥产卵。因此,库蚊对卵或幼虫没有化学反应,但有异常的视觉反应。改变五个筏子相互连接的模式并改变单个筏子的大小似乎表明蚊子对总筏子面积而不是数量的反应更多。可以通过化学方法检测水中 2 龄或 4 龄(最终)同种幼虫的存在,但不会对产卵产生积极或消极的影响。同种幼虫表明水适合产卵,但它们是可用食物的竞争者,因此许多研究表明,特别是年龄较大的幼虫排斥产卵。因此,库蚊对卵或幼虫没有化学反应,但有异常的视觉反应。可以通过化学方法检测水中 2 龄或 4 龄(最终)同种幼虫的存在,但不会对产卵产生积极或消极的影响。同种幼虫表明水适合产卵,但它们是可用食物的竞争者,因此许多研究表明,特别是年龄较大的幼虫排斥产卵。因此,库蚊对卵或幼虫没有化学反应,但有异常的视觉反应。可以通过化学方法检测水中 2 龄或 4 龄(最终)同种幼虫的存在,但不会对产卵产生积极或消极的影响。同种幼虫表明水适合产卵,但它们是可用食物的竞争者,因此许多研究表明,特别是年龄较大的幼虫排斥产卵。因此,库蚊对卵或幼虫没有化学反应,但有异常的视觉反应。但它们是可用食物的竞争者,因此许多研究表明,特别是年长的幼虫会排斥产卵。因此,库蚊对卵或幼虫没有化学反应,但有异常的视觉反应。但它们是可用食物的竞争者,因此许多研究表明,特别是年长的幼虫会排斥产卵。因此,库蚊对卵或幼虫没有化学反应,但有异常的视觉反应。
更新日期:2021-01-06
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