Feeding and foraging behaviour of a generalist caterpillar: are third instars just bigger versions of firsts?
Feeding and foraging behaviour of a generalist caterpillar: are third instars just bigger versions of firsts?
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DOI：
10.1017/s0007485307004750
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发表时间：
2007-02-01
影响因子：
1.9
通讯作者：
Zalucki, M. P.
中科院分区：
文献类型：
--
作者：
Johnson, M. -L.;Zalucki, M. P.
1龄和3龄棉铃虫Helicoverpa armigera（Hubner）对绿豆（Vigna radiata（L.）R. Wilczek（豆科）（绿豆）的昆虫通过频繁，反复观察整个植物。两龄幼虫取食、休息和寻找的时间不同。第三龄幼虫经常被发现在植物的暴露区域觅食，如果在终端部分，会比第一龄幼虫更频繁地离开这些区域。三龄幼虫在更少的网站和花费更少的时间寻找和休息，在更长的回合和花费20%以上的时间喂养比一龄。虽然这两个龄期往往向上移动到顶部的植物，这适用于约一半的第三龄观察相比，所有的第一龄。一龄幼虫的相对生长率高于三龄幼虫。结果表明，不能假定第一龄幼虫只是晚龄幼虫的较小版本。
Similarities and differences in foraging behaviour between first and third instar Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) on Vigna radiata (L.) R. Wilczek (Fabaceae) (mung bean) were determined by frequent, repeated observation of insects on whole plants. The time apportioned to feeding, resting and searching by these two larval instars differed. Third instars were often found feeding on exposed areas of the plant and, if in the terminal parts, would leave these areas more frequently than first instars. Third instars fed at fewer sites and spent less time searching and resting, fed in longer bouts and spent 20% more time feeding than first instars. Although both instars tended to move upwards to the top of the plant, this applied to approximately half of the third instars observed compared to all of the first instars. First instars were found to have a higher relative growth rate than third instars. The results show that it cannot be assumed that first instars are just smaller versions of late instars.