Effect of hydration state on locomotor performance and water searching behavior of the terrestrial lungless salamander Bolitoglossa ramosi

IF 1.9 3区 生物学 Q1 ZOOLOGY
C. Galindo, K. Gutiérrez, L. Calvache, M. H. Bernal
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引用次数: 0

Abstract

Bolitoglossa ramosi is a terrestrial plethodontid salamander particularly active during cloudy nights with high relative humidity in the environment. In this work, we tested the hypotheses that: (1) the hydration state of B. ramosi directly affects its locomotor performance; (2) dehydrated salamanders spend less time to find a water source than hydrated salamanders and (3) dehydrated salamanders find a water source in fewer attempts than hydrated individuals. To evaluate these hypotheses, salamanders at different levels of body hydration were used for an experiment of maximum locomotor performance, and a behavioral assessment test for searching a water source that was randomly located in one of the eight arms of a labyrinth. We found that salamanders hydrated at 95% had a greater locomotor performance (speed) than those hydrated at 85% and 75%. On the other hand, salamanders hydrated at 75% found the water source faster than those hydrated at 95%, although there was not a significant difference between these two groups of salamanders tested in the number of arms visited to find the water source. According to our results, we propose that dehydration in salamanders could be a causal factor for the inactivity of these animals during low levels of environmental humidity, and can also motivate a faster response to find a water source. In addition, we postulate that B. ramosi seems to use a random searching behavior to locate a water source as both hydrated and dehydrated salamanders find it after several attempts.

Abstract Image

Abstract Image

水合状态对陆生无肺蝾螈(Bolitoglossa ramosi)运动表现和寻水行为的影响
Bolitoglossa ramosi 是一种陆生胸棘螈,在环境相对湿度较高的阴天夜晚特别活跃。在这项工作中,我们检验了以下假设(1)蝾螈的水合状态直接影响其运动表现;(2)与水合蝾螈相比,脱水蝾螈花在寻找水源上的时间更少;(3)与水合蝾螈相比,脱水蝾螈花在寻找水源上的时间更少。为了评估这些假设,我们用不同水合水平的蝾螈进行了最大运动性能实验,以及寻找水源的行为评估测试,水源随机位于迷宫的八个臂中的一个。我们发现,体内水分含量为 95% 的蝾螈比体内水分含量为 85% 和 75% 的蝾螈具有更高的运动能力(速度)。另一方面,补充了 75% 水分的蝾螈比补充了 95% 水分的蝾螈更快找到水源,尽管这两组蝾螈在寻找水源时所经过的臂的数量上没有显著差异。根据我们的研究结果,我们认为蝾螈脱水可能是这些动物在环境湿度较低时不活跃的一个原因,也可能促使它们更快地找到水源。此外,我们推测拉莫斯蝾螈似乎使用随机搜索行为来寻找水源,因为水合蝾螈和脱水蝾螈都是在多次尝试后才找到水源的。
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来源期刊
Journal of Zoology
Journal of Zoology 生物-动物学
CiteScore
3.80
自引率
0.00%
发文量
90
审稿时长
2.8 months
期刊介绍: The Journal of Zoology publishes high-quality research papers that are original and are of broad interest. The Editors seek studies that are hypothesis-driven and interdisciplinary in nature. Papers on animal behaviour, ecology, physiology, anatomy, developmental biology, evolution, systematics, genetics and genomics will be considered; research that explores the interface between these disciplines is strongly encouraged. Studies dealing with geographically and/or taxonomically restricted topics should test general hypotheses, describe novel findings or have broad implications. The Journal of Zoology aims to maintain an effective but fair peer-review process that recognises research quality as a combination of the relevance, approach and execution of a research study.
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