Thermoregulatory Capability and Temperature Effects on Foraging Success in Two Species of Crab Spider, Misumenoides formosipes and Misumenops asperatus

两种蟹蛛（Misumenoides formosipes 和 Misumenops asperatus）的温度调节能力和温度对觅食成功的影响

• 批准号: 9311203
• 负责人: Timothy Casey
• 金额: $ 0.26万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-15 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9311203&HistoricalAwards=false
• 关键词: Thermoregulatory; Capability; Temperature; Effects; Foraging

9311203 Casey Temperature affects organisms at many levels and influences such fundamental processes as metabolic rate, growth rate, and movement capability. Although a great deal of research has been devoted to determining how temperature affects various processes within a single organism, little work has been done to investigate the influence of temperature on between-organism interactions. Using spiders as model terrestrial predators, our research will focus on the affect of temperature on predator-prey interactions by asking the following questions: does spider foraging success change as environmental temperature changes over the course of a day, and if so, can spiders extend the period of maximal prey capture by regulating body temperature? We will use two species of crab spider, Misumenops asperatus and Misumenoides formosipes, which mature in late spring and late summer, respectively. These spiders are ambush predators that hunt on flowers and physically over-power prey rather than ensnaring it in silk. Employing a combination of laboratory and field experiments, we will determine (for each species) preferred temperature, the temperature range over which spiders are capable of activity, the effect of temperature on spider foraging success within that temperature range, the timing of greatest prey capture in the field, and the timing of greatest prey visitation to flowers used by the spiders. Using spider species which mature at different times during the season, and thus experience different temperature regimes, will allow us to make a better determination of how temperature may affect spiders directly by limiting the amount of time a spider can remain active. Alternatively, spiders may be tolerant to a broad temperature range, yet may still be indirectly temperature limited by direct temperature limitations on prey activity time. *** v s t $ $ $ ( F / C Dutch (scalable) Symbol " Swiss (scalable) 5 Courier New " h G H W G R:\WW20USER\ABSTRACT.DOT Rochelle D Ray Rochelle D Ray

9311203 Casey 温度在多个层面上影响生物体，影响新陈代谢率、生长率和运动能力等基本过程。尽管大量研究致力于确定温度如何影响单个生物体内的各种过程，但很少有人研究温度对生物体之间相互作用的影响。 使用蜘蛛作为陆地捕食者模型，我们的研究将重点关注温度对捕食者与猎物相互作用的影响，并提出以下问题：蜘蛛觅食的成功率是否会随着一天中环境温度的变化而变化，如果是这样，蜘蛛能否通过调节体温来延长最大猎物捕获的时间？我们将使用两种蟹蛛，Misumenops asperatus 和 Misumenoides formosipes，它们分别在春末和夏末成熟。这些蜘蛛是伏击掠食者，它们捕食花朵并用身体压制猎物，而不是用丝诱捕猎物。通过实验室和现场实验的结合，我们将确定（对于每个物种）首选温度、蜘蛛能够活动的温度范围、温度范围内温度对蜘蛛觅食成功的影响、田间捕获最大猎物的时间，以及蜘蛛访问花朵的最大猎物的时间。使用在季节不同时间成熟并因此经历不同温度状况的蜘蛛物种，将使我们能够通过限制蜘蛛保持活跃的时间来更好地确定温度如何直接影响蜘蛛。或者，蜘蛛可以耐受较宽的温度范围，但仍然可能受到对猎物活动时间的直接温度限制的间接温度限制。 *** v s t $ $ $ ( F / C 荷兰语 (可扩展) 符号 " 瑞士 (可扩展) 5 Courier New " h G H W G R:\WW20USER\ABSTRACT.DOT Rochelle D Ray Rochelle D Ray