Ambient light spectrum affects larval Mexican jumping bean moth (Cydia saltitans) behavior despite light obstruction from host seed

IF 1.3 4区 生物学 Q4 BEHAVIORAL SCIENCES
Faith Summers , Amber M. Tuske , Cassandra Puglisi , Annie Wong , Andrés Rojo , Lindsey Swierk
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引用次数: 0

Abstract

Spectral differences in ambient light can affect animal behavior and convey crucial information about an individual’s environment. The ability to perceive and respond to differences in ambient light varies widely by taxa and is shaped by a species’ ecology. Mexican jumping bean moths, Cydia saltitans, spend their entire larval period encased in fallen host seeds and contend with potentially lethal environmental temperatures when host seeds are in direct sunlight. We investigate if and how C. saltitans larvae in host seeds respond to lighting conditions associated with these thermal risks. In a temperature-controlled experiment, we identified that larvae demonstrated distinct behavioral (“jumping”) responses corresponding to four lighting treatments (white, red, green, and purple), despite extremely minimal light penetration through host seed walls. Red light induced the greatest larval activity (measured by probability of movement and by displacement from origin), suggesting that larvae have mechanisms to perceive low levels of red light and/or to detect subtle increases in heat produced by red/near infrared-biased light spectra, possibly providing them with an early-warning mechanism against thermal stress. Our findings highlight the interplay of environmental lighting, behavior, and potential thermosensory adaptations in a species with a visually constrained environment.

尽管寄主种子阻挡了光线,但环境光谱仍会影响幼虫墨西哥跳豆蛾(Cydia saltitans)的行为。
环境光的光谱差异会影响动物的行为,并传递有关个体所处环境的重要信息。不同类群对环境光线差异的感知和反应能力差异很大,并且受物种生态学的影响。墨西哥跳豆天蛾(Cydia saltitans)的整个幼虫期都被包裹在落下的寄主种子中,当寄主种子被阳光直射时,它们要与可能致命的环境温度作斗争。我们研究了寄主种子中的沙丁夜蛾幼虫在自然环境中是否以及如何应对与这些热风险相关的光照条件。在一项温控实验中,我们发现尽管寄主种子壁的透光率极低,但幼虫在四种光照(白光、红光、绿光和紫光)条件下会表现出不同的行为("跳跃")反应。红光诱导的幼虫活动最高(以移动概率和离开原点的位移来衡量),这表明幼虫具有感知低水平红光和/或检测红光/近红外偏振光光谱产生的微弱热量增加的机制,这可能为它们提供了一种对抗热应力的预警机制。我们的研究结果突显了在视觉受限的环境中,环境光照、行为和潜在热感适应的相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Behavioural Processes
Behavioural Processes 生物-动物学
CiteScore
2.70
自引率
7.70%
发文量
144
审稿时长
4-8 weeks
期刊介绍: Behavioural Processes is dedicated to the publication of high-quality original research on animal behaviour from any theoretical perspective. It welcomes contributions that consider animal behaviour from behavioural analytic, cognitive, ethological, ecological and evolutionary points of view. This list is not intended to be exhaustive, and papers that integrate theory and methodology across disciplines are particularly welcome.
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