The carabid Pterostichus melanarius uses chemical cues for opportunistic predation and saprophagy but not for finding healthy prey
The carabid Pterostichus melanarius uses chemical cues for opportunistic predation and saprophagy but not for finding healthy prey
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步甲翼龙利用化学信号进行机会性捕食和腐食，但不是为了寻找健康的猎物
DOI：
10.1007/s10526-017-9829-5
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发表时间：
2017
期刊：
影响因子：
2.5
通讯作者：
G. Lövei
中科院分区：
文献类型：
--
作者：
M. Ferrante;G. Barone;G. Lövei
哨兵猎物法可以量化不同栖息地的捕食压力。真实的猎物被认为更真实地模仿捕食者的经历，但捕食者很少能被识别出来。由橡皮泥制成的人造猎物可能缺乏真正的化学线索，但可以提供有关捕食者身份的信息。然而，人造猎物和真实猎物所记录的捕食压力之间的关系尚不清楚。我们测试了人工毛虫和白菜蛾（Mamestra brassicae）的完整、受伤和死亡幼虫对Carabidae捕食者Pterostichus melanarius Illiger（鞘翅目：Carabidae）的吸引力。相对于活的或受伤的毛虫，黑绒螯蟹成虫更容易被死去的毛虫吸引。用毛虫血淋巴包裹人工毛虫，增加了其吸引力。然而，捕食者对健康的、真正的毛毛虫的吸引力并不比对“未经处理的”人造毛毛虫的吸引力大。我们的结论是，使用人工毛虫不会低估这种瓢虫对健康毛虫的捕食压力。
The sentinel prey method can quantify predation pressure in various habitats. Real prey is assumed to more realistically mimic the predator experience but the predator can rarely be identified. Artificial prey made of plasticine may lack real chemical cues, but provides information about predator identity. However, the relationship between predation pressure registered by artificial versus real prey is not clear. We tested the relative attractiveness of artificial caterpillars, and intact, wounded, or dead larvae of the cabbage moth (Mamestra brassicae) for the carabid predator Pterostichus melanarius Illiger (Coleoptera: Carabidae). P. melanarius adults were attracted to dead caterpillars more than to live or wounded ones. Coating artificial caterpillars with caterpillar haemolymph increased their attractiveness. However, predators were not attracted more to healthy, real caterpillars than to “untreated” artificial ones. We conclude that using artificial caterpillars does not underestimate predation pressure by this carabid on healthy caterpillars.