期刊
JOURNAL OF THERMAL BIOLOGY
卷 34, 期 8, 页码 401-405出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jtherbio.2009.09.001
关键词
Amphibians; Aquatic air breathers; Ectotherms; Swimming angle; Swimming speed; Thermal sensitivity; Time costs
资金
- Czech Science Foundation [206/06/0953]
- Czech Ministry of Education [LC06073]
An aquatic lifestyle poses serious restriction to air-breathing animals in terms of time and energy spent during a dive cycle. The diving frequency increases with water temperature, therefore an ectotherm's time budget greatly depends on the thermal characteristics of the aquatic environment. Available data suggests that time costs caused by temperature-dependent dive frequency can be partially compensated for by adjusting the swimming speed and diving angle during dive cycle. We tested this prediction by examining the influence of temperature on the diving behaviour of the alpine newt, Triturus alpestris. The ascending speed and angle showed disparate patterns of temperature dependency, with a minor influence on travel duration. Surprisingly, at higher temperatures, the diving newts saved most of their time by restricting swimming activity in the water column during their return to the bottom and not by adjusting their ascending duration. Hence, aquatic newts have the capacity to reduce temperature-dependent time costs of aerial breathing primarily by behavioural modifications during the descending phase of the dive cycle. (C) 2009 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据