Ernsting G
Department of Biology, Free University, De Boelelaan 1087, Amsterdam-Buitenveldert, The Netherlands.
Oecologia. 1977 Jan;31(1):13-20. doi: 10.1007/BF00348704.
With diurnally active predators like Notiophilus biquttatus F. food deprivation is involved in predation in two ways: as a consequence of food shortage (i.e., low prey density), and as a consequence of the night period. The pattern of food intake after deprivation at night has been studied with respect to two prey species and differently deprived predators. They prey species represent a locomotory active one (Orchesella cincta) and a locomotory inactive one (Tomocerus minor). It appears that the rate of predation after deprivation shows a distinct pattern, initially high and then slowing to a more or less constant value. This pattern is influenced by food deprivation and type of prey. The beetles preying on O. cincta consumed more prey than those preying on T. minor. The more deprived predators compensated for deprivation by a higher daily predation when O. cincta was the prey, but not when T. minor was. Consequences of these findings are discussed with respect to diet composition and functional response.
对于像双色步甲这样白天活动的捕食者来说，食物剥夺在捕食过程中以两种方式起作用：一是食物短缺（即猎物密度低）的结果，二是夜间时段的结果。针对两种猎物物种以及不同程度食物剥夺的捕食者，研究了夜间食物剥夺后的食物摄入模式。这两种猎物物种分别代表一种活动活跃的（环带跳虫）和一种活动不活跃的（微小圆跳虫）。似乎食物剥夺后的捕食率呈现出一种明显的模式，起初很高，然后逐渐减缓至或多或少的恒定值。这种模式受食物剥夺和猎物类型的影响。捕食环带跳虫的甲虫比捕食微小圆跳虫的甲虫消耗更多猎物。当以环带跳虫为猎物时，食物剥夺程度越高的捕食者通过更高的每日捕食量来弥补食物剥夺，但以微小圆跳虫为猎物时则不然。就饮食组成和功能反应而言，对这些发现的结果进行了讨论。
