School of Biological Sciences, University of Sydney, A08 - Heydon-Laurence Building, NSW 2006, Australia; Department of Biology, Queen's University, Kingston, ON K7L 3N6, Canada.
School of Biological Sciences, University of Sydney, A08 - Heydon-Laurence Building, NSW 2006, Australia.
Comp Biochem Physiol A Mol Integr Physiol. 2019 Mar;229:81-92. doi: 10.1016/j.cbpa.2018.12.005. Epub 2018 Dec 18.
Optimal breeding conditions for locust swarms often include heavy rainfall and flooding, exposing individuals to the risk of immersion and anoxia. We investigated anoxia tolerance in solitarious and gregarious adults of the Australian Plague Locust, Chortoicetes terminifera, by measuring the time to enter an anoxic coma after submersion in water, the time for recovery of ventilation and the ability to stand on return to air. We found a longer time to succumb in immature adults that we attribute to a larger tracheal volume. Time to succumb was also longer after autotomizing the hindlegs to reduce the energetic cost of muscular activity. Time to recover was longer in gregarious males and this developed during maturation, suggesting an increase in the cost of neural processing associated with social interactions under crowded conditions. Short-term changes in rearing conditions had effects that we interpret as stress responses, potentially mediated by octopamine.
蝗虫群的最佳繁殖条件通常包括大量降雨和洪水，使个体面临浸泡和缺氧的风险。我们通过测量浸水后进入缺氧昏迷的时间、恢复通气的时间以及返回空气后站立的能力，研究了澳大利亚瘟疫蝗（Chortoicetes terminifera）独居和群居成虫的缺氧耐受性。我们发现，未成熟的成虫需要更长的时间才能屈服，这归因于更大的气管体积。后肢自切后屈服的时间也更长，这降低了肌肉活动的能量成本。群居雄性恢复的时间更长，这是在成熟过程中发展起来的，这表明与拥挤条件下的社交互动相关的神经处理成本增加。饲养条件的短期变化产生了我们认为是应激反应的影响，可能是由章鱼胺介导的。
