Context dependency and generality of fever in insects
Context dependency and generality of fever in insects
复制标题
DOI：
10.1007/s00114-013-1057-y
复制
发表时间：
2013-07-01
影响因子：
--
通讯作者：
Adamo, S. A.
中科院分区：
文献类型：
--
作者：
Stahlschmidt, Z. R.;Adamo, S. A.
发热可降低受感染动物的死亡率。然而，尽管发烧具有增强身体素质的特性，但动物之间的发烧往往各不相同。我们使用了几种方法来研究昆虫的这种变异。在注射前列腺素后，德克萨斯田蟋蟀（Gryllus texensis）表现出适度的发烧（首选体温升高1摄氏度，T（首选温度）），前列腺素被认为可以在脊椎动物和无脊椎动物中介导发烧，但它们在长期暴露于热杀细菌中没有表现出发烧。此外，长期的食物限制和交配状态不影响T （pref）或行为性发热的表达，这表明在G. texensis中发热的环境依赖性有限。我们对行为性发热研究的荟萃分析表明，行为性发热发生在许多昆虫中，但并非普遍存在。因此，经验和荟萃分析结果都表明，昆虫的发热反应“广泛存在，尽管肯定不是不可避免的”（Moore 2002）。我们强调，未来需要将工作重点放在标准化实验方案上，以测量行为性发烧，了解昆虫发烧的具体机制，并检查生态或生理成本是否经常超过发烧的好处，以及是否可以解释昆虫发烧的散发性质。
Fever can reduce mortality in infected animals. Yet, despite its fitness-enhancing qualities, fever often varies among animals. We used several approaches to examine this variation in insects. Texas field crickets (Gryllus texensis) exhibited a modest fever (1 A degrees C increase in preferred body temperature, T (pref)) after injection of prostaglandin, which putatively mediates fever in both vertebrates and invertebrates, but they did not exhibit fever during chronic exposure to heat-killed bacteria. Further, chronic food limitation and mating status did not affect T (pref) or the expression of behavioural fever, suggesting limited context dependency of fever in G. texensis. Our meta-analysis of behavioural fever studies indicated that behavioural fever occurs in many insects, but it is not ubiquitous. Thus, both empirical and meta-analytical results suggest that the fever response in insects 'is widespread, although certainly not inevitable' (Moore 2002). We highlight the need for future work focusing on standardizing an experimental protocol to measure behavioural fever, understanding the specific mechanism(s) underlying fever in insects, and examining whether ecological or physiological costs often outweigh the benefits of fever and can explain the sporadic nature of fever in insects.