防御性被捕食者可利用量的波动可调节六斑月瓢虫的功能反应曲线（英文）
发布时间：2018-10-23 15:00
【摘要】：【目的】本研究评价了在被捕食者波动条件下,在花生蚜Aphis craccivora Koch和萝卜蚜Lipaphis erysimi(Kaltenbach)上六斑月瓢虫Menochilus sexmaculatus(Fabricius)4龄幼虫的功能反应。萝卜蚜是一种含烯丙基异硫氰酸酯的防御性被捕食者。我们推测,在试验的被捕食者条件下,在最适量被捕食者或丰富的被捕食者条件下饲养的幼虫比在缺乏被捕食者条件下饲养的幼虫表现出更好的功能反应。而在萝卜蚜上六斑月瓢虫的功能反应曲线的斜率比在花生蚜上要低。【方法】将六斑月瓢虫4龄幼虫从饲养条件(缺乏被捕食者/最适乏被捕食者/丰富的被捕食者)突然转移到不同的试验条件(极为缺乏被捕食者/缺乏被捕食者/次适量被捕食者/最适量被捕食者/丰富的被捕食者)下,外推出其功能曲线。【结果】尽管被捕食资源发生了改变,但是六斑月瓢虫4龄幼虫在花生蚜上表现出Ⅱ型反应,而在萝卜蚜上表现出改变的Ⅱ型反应。此外,在5个试验条件下,不管是哪种被捕食者,在最适量被捕食者/丰富的被捕食者条件下饲养的4龄幼虫均表现出正常的捕食率。但是在缺乏被捕食者条件下饲养的4龄幼虫突然转变到最适量/丰富的被捕食者实验条件下时,它们通过取食比平时更多的被捕食者的生物量来补偿食物的短缺。不过,它们在丰富的被捕食者条件下的取食量最高,在极为缺乏被捕食者的试验条件下的取食量最低。而且,在花生蚜上记录到较高的攻击率和较低的猎物处理时间。【结论】结果说明,萝卜蚜可利用量的波动可改变六斑月瓢虫幼虫的功能反应。然而,对于六斑月瓢虫而言,花生蚜比萝卜蚜是更为合适的被捕食者。
[Abstract]:[objective] to evaluate the functional responses of the 4th instar larvae of ladybird Menochilus sexmaculatus (Fabricius) on Aphis craccivora Koch and Lipaphis erysimi (Kaltenbach) of peanut aphid and radish aphid under the condition of prey fluctuation. Radish aphid is a defensive predator containing allyl isothiocyanates. We conjecture that the larvae fed on the most suitable prey or abundant prey have better functional response than those fed in the absence of the prey under the experimental predatory condition. However, the slope of the functional response curve of the ladybug on the radish aphid was lower than that on the peanut aphid. [methods] the 4th instar larvae of ladybird were collected from the feeding conditions (lack of prey / optimal lack of prey / abundant arrest). A sudden shift to different test conditions (a severe lack of prey / secondary moderate prey / most moderate prey / rich predator), [results] although the predatory resources changed, the 4th instar larvae of ladybug showed type 鈪，
本文编号：2289590
[Abstract]:[objective] to evaluate the functional responses of the 4th instar larvae of ladybird Menochilus sexmaculatus (Fabricius) on Aphis craccivora Koch and Lipaphis erysimi (Kaltenbach) of peanut aphid and radish aphid under the condition of prey fluctuation. Radish aphid is a defensive predator containing allyl isothiocyanates. We conjecture that the larvae fed on the most suitable prey or abundant prey have better functional response than those fed in the absence of the prey under the experimental predatory condition. However, the slope of the functional response curve of the ladybug on the radish aphid was lower than that on the peanut aphid. [methods] the 4th instar larvae of ladybird were collected from the feeding conditions (lack of prey / optimal lack of prey / abundant arrest). A sudden shift to different test conditions (a severe lack of prey / secondary moderate prey / most moderate prey / rich predator), [results] although the predatory resources changed, the 4th instar larvae of ladybug showed type 鈪，
本文编号：2289590
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