Karowe D N
Department of Biology, University of Michigan, 48109, Ann Arbor, MI, USA.
Oecologia. 1989 Jan;78(1):106-111. doi: 10.1007/BF00377204.
Although newly-emerged Colias philodice readily accept Medicago sativa, Melilotus alba, and Coronilla varia, fifth instar larvae reared on any single plant species display a highly significant induced feeding preference for their rearing host. Forced host-switching reveals that fifth instar relative growth rate (RGR) on M. sativa and M. alba is significantly reduced by prior feeding on either alternative host. Moreover, regardless of rearing diet, switching to a novel host during the fifth instar results in reduced RGR, relative consumption rate (RCR), efficiency of conversion of digested food (ECD), and pupal weight. These results support the hypothesis that induction of feeding preference is an adaptive response that predisposes larvae to feed on the plant species they are most capable of utilizing for growth.
尽管新羽化的云粉蝶很容易接受紫花苜蓿、白花草木樨和小冠花，但在任何单一植物物种上饲养的五龄幼虫对其饲养宿主表现出高度显著的诱导取食偏好。强制宿主转换表明，先前取食任何一种替代宿主都会显著降低五龄幼虫在紫花苜蓿和白花草木樨上的相对生长率（RGR）。此外，无论饲养饮食如何，在五龄期间转换到新宿主都会导致RGR、相对摄食率（RCR）、消化食物转化率（ECD）和蛹重降低。这些结果支持了以下假设：取食偏好的诱导是一种适应性反应，使幼虫倾向于取食它们最能用于生长的植物物种。
