Thermal biology and locomotor performance of the Andean lizard Liolaemus fitzgeraldi (Liolaemidae) in Argentina

IF 1.1 4区 生物学 Q4 ANATOMY & MORPHOLOGY
Acta Zoologica Pub Date : 2022-09-26 DOI:10.1111/azo.12440
Franco M. Valdez Ovallez, Rodrigo Gómez Alés, Vanesa Astudillo, Mariela Córdoba, Gustavo Fava, Rodrigo Acosta, Graciela Blanco, José Villavicencio, Juan Carlos Acosta
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引用次数: 0

Abstract

Ectotherms thermoregulate to maintain their body temperature within the optimal range needed for performing vital functions. The effect of climate change on lizards has been studied as regards the sensitivity of locomotor performance to environmental temperatures. We studied thermoregulatory efficiency and locomotor performance for Liolaemus fitzgeraldi in the Central Andes of Argentina. We determined body temperature, micro-environmental temperatures and operative temperatures in the field. In the laboratory, we measured preferred temperatures and calculated the index of thermoregulatory efficiency. We estimated the thermal sensitivity of locomotion by measuring sprint speed (initial velocity and long sprint) and endurance at five different body temperatures. Body temperature was not associated with either micro-environmental temperature, nor did it show differences with preferred temperatures. Thermoregulatory efficiency was moderate (0.61). Initial velocity and long sprint trials showed differences at different temperatures; however, endurance did not. Moreover, the optimal temperatures for the performance trials showed no significant differences among themselves. We conclude that Liolaemus fitzgeraldi has thermal sensitivity in locomotor performance with respect to body temperature and that it is an eurythermic lizard that experiences a large variation in body temperature and that has thermal flexibility in the cold.

阿根廷安第斯蜥蜴Liolaemus fitzgeraldi(Liolaemidae)的热生物学和运动性能
体外体温调节,将体温保持在执行重要功能所需的最佳范围内。研究了气候变化对蜥蜴运动性能对环境温度的敏感性。我们研究了阿根廷安第斯山脉中部的Liolaemus fitzgeraldi的体温调节效率和运动性能。我们在野外测定了体温、微环境温度和操作温度。在实验室中,我们测量了首选温度,并计算了温度调节效率指数。我们通过测量五种不同体温下的冲刺速度(初速和长距离冲刺)和耐力来估计运动的热敏感性。体温与微环境温度都没有关联,也没有显示出与首选温度的差异。体温调节效率中等(0.61)。初速和长距离冲刺试验在不同温度下表现出差异;然而,耐力却没有。此外,性能试验的最佳温度之间没有显著差异。我们得出的结论是,Liolaemus fitzgeraldi在运动性能方面对体温具有热敏性,它是一种体温变化较大的宽温蜥蜴,在寒冷中具有热灵活性。
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来源期刊
Acta Zoologica
Acta Zoologica 生物-动物学
CiteScore
2.90
自引率
8.30%
发文量
35
审稿时长
>12 weeks
期刊介绍: Published regularly since 1920, Acta Zoologica has retained its position as one of the world''s leading journals in the field of animal organization, development, structure and function. Each issue publishes original research of interest to zoologists and physiologists worldwide, in the field of animal structure (from the cellular to the organismic level) and development with emphasis on functional, comparative and phylogenetic aspects. Occasional review articles are also published, as well as book reviews.
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