异色瓢虫捕食胁迫对黑腹果蝇繁殖与后代发育的影响水

以模式昆虫黑腹果蝇(Drosophila melanogaster)及捕食性天敌异色瓢虫(Harmonia axyridis)为研究系统,通过把异色瓢虫接入到有黑腹果蝇的指形管中,研究了黑腹果蝇雌、雄成虫单独或共同被异色瓢虫捕食胁迫后,其自身寿命、子代的生长发育、繁殖和适合度的变化。结果表明:当雄性黑腹果蝇受到异色瓢虫成虫胁迫时,其寿命明显延长,但胁迫与否对雌性黑腹果蝇的寿命无明显影响;当黑腹果蝇的雌雄成虫同时受到胁迫时,其子代幼虫的发育历期延长,雄性后代寿命也增加,而雌性或雄性黑腹果蝇单独受到胁迫,其子代幼虫发育进度没有明显改变;当初孵黑腹果蝇幼虫受到异色瓢虫成虫直接或间接捕食胁迫后,其后续幼虫的发育历期都会受到影响,其中1龄期受到的间接捕食胁迫作用的影响大于直接捕食胁迫作用,直接捕食胁迫1龄幼虫比间接捕食胁迫更能延长其将来雌性成虫的寿命。

Effects of predatory stress imposed by Harmonia axyridis on the development and fecundity of Drosophila melanogaster

Model insect Drosophila melanogaster was exposed to its predatory natural enemy Harmonia axyridis to study the responses of the insect in its development and fecundity.When the male and female D.melanogaster adults were separately exposed to H.axyridis,the lifespan of the males was significantly extended,while that of the females was less affected;when the male and female D.melanogaster adults were exposed together to H.axyridis,the development duration of D.melanogaster larvae and the lifespan of the males...