...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological Entomology >Tigers eating tigers: evidence of intraguiid predation operating in an assemblage of tiger beetles
【24h】

Tigers eating tigers: evidence of intraguiid predation operating in an assemblage of tiger beetles

机译：老虎吃老虎：公会内捕食老虎甲虫的证据

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

1. Co-occurrence of closely related predators in a prey-limited habitat appears to contradict the principle of competitive exclusion, however it may be explained through indirect effects, niche shifts, and intraguiid predation. 2. The interactionsbetween sympatric tiger beetle Cicindela species were examined. Cicindela circumpicta is the largest of three species (C. circumpicta, C. togata, C. fulgida) found in saline habitats throughout central North America. The temporal occurrence ofthese species overlaps, as does their spatial occurrence on exposed salt flats of saline marshes. During field observations, exoskeletal remains of C. togata were found at the study site in Nebraska,, U.S.A. 3. In laboratory trials, male C. circumpictaate C. togata in 38% of trials and female C. circumpicta ate C. togata in 50% of trials (n = 24). 4. In the field, potential prey, consisting mainly of small flies, was found mostly in shaded conditions but tiger beetles differed significantly in shadeuse, with C. circumpicta spending 70% of the time in the shade compared with =20% for C. togata. Differential habitat use was not explained by maximum temperature tolerances, which did not differ between the species. 5. Laboratory trials established that both tiger beetle species consumed small prey (apterous Drosophila) but C. togata was more efficient at capturing winged Drosophila. 6. Foraging efficiency, as measured by the time taken for a C. togata to capture three prey items, decreasedsignificantly in the presence of other tiger beetles, especially C. circumpicta. 7. These results are an indication that intraguiid predation and induced changes in foraging behaviour operate in the ecology of adult tiger beetles.
机译：1.在捕食受限的栖息地中同时存在密切相关的捕食者似乎与竞争排斥的原则相抵触，但是可以通过间接作用，生态位转移和指南内捕食来解释。 2.研究了同胞老虎甲虫Cicindela之间的相互作用。 Cicindela circumpicta是在北美洲中部盐碱生境中发现的三种物种（C. circumpicta，C。togata，C。fulgida）中最大的一种。这些物种的时间发生重叠，它们在盐沼裸露的盐滩上的空间发生重叠。在野外观察期间，在美国内布拉斯加州的研究地点发现了togata的外骨骼残骸。3在实验室试验中，有38％的试验中雄性圆角衣原体和togata雌性中有50％。试验百分比（n = 24）。 4.在田间，发现主要由小苍蝇组成的潜在猎物大多处于遮荫条件下，但虎甲在遮荫条件下有显着差异，环柏假单胞菌在遮荫处花费的时间为70％，而C则为20％。 togata。最高温度耐受性不能解释不同的栖息地使用方式，最高温度耐受性在物种之间没有差异。 5.实验室试验确定，这两种老虎甲虫都消耗小猎物（果蝇属），但togata C. togata在捕获有翅果蝇方面更有效。 6.捕食效率，以多毛梭菌捕获三个猎物所需的时间来衡量，在其他老虎甲虫（尤其是圆角梭菌）的存在下显着降低。 7.这些结果表明，成年虎甲虫的生态系统中有内部觅食和觅食行为的诱导变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号