冬季巢温升高不会影响彩龟(Chrysemys picta)幼体的残余卵黄代谢。

IF 3.5 1区 生物学 Q1 ZOOLOGY
Daniel A Warner, Timothy S Mitchell, Fredric J Janzen
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引用次数: 0

摘要

全球气温升高会对生物体、种群和生态系统产生广泛影响。冬季气温升高预计会改变在此期间处于休眠状态的物种的能量。幼年彩龟(Chrysemys picta)在陆地上的浅巢中度过最初的8个月,在春季萌发前的这段不活动时期,它们可能依靠剩余的卵黄储备来满足能量需求。我们进行了一项实验室实验来描述皮氏幼体残余卵黄数量的变化,并通过实验测试了温度对残余卵黄、幼体大小和冬眠期存活率的影响。我们通过模拟两种自然热机制("低 "与 "高 "处理)和一种近似于预计到2100年温度升高的机制("未来 "处理)来操纵冬季巢温。由于高温会增加新陈代谢,我们预测未来温度处理会减少冬季结束时剩余的卵黄量,并降低幼体质量和存活率。越冬后的卵黄残留量与越冬前的卵黄残留量没有差别,温度对第二年春季的卵黄残留量和幼体存活率也没有影响。然而,与其他处理的幼体相比,经历了未来温度的幼体在冬季损失了更多的质量。这些结果与之前的研究一致,表明残余卵黄并不能满足幼体在冬季的能量需求。未来气温升高对体重的影响可能会对幼体在春季萌发和分散过程中的高能量活动产生负面影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Increased nest temperature during winter does not affect residual yolk metabolism of hatchling painted turtles (Chrysemys picta).

Rising global temperatures have a wide range of effects at organismal, population, and ecosystem levels. Increased winter temperatures are expected to alter the energetics of species that are dormant during this time. Hatchling painted turtles (Chrysemys picta) spend their first ∼8 months in shallow nests on land, where they putatively rely on residual yolk reserves to fuel energetic demands during this period of inactivity before they emerge in the spring. We performed a laboratory experiment to characterize changes in residual yolk quantity in hatchling C. picta and experimentally tested the effect of temperature on residual yolk, hatchling size, and survival over the winter brumation period. We manipulated winter nest temperature by simulating two natural thermal regimes ("low" vs "high" treatments) and one regime that approximates warmer temperatures expected by 2100 ("future" treatment). Because high temperature increases metabolism, we predicted that the future temperature treatment would decrease the amount of residual yolk remaining by the end of winter and reduce hatchling mass and survival. Residual yolk over winter did not differ from that before winter, and the temperature had no effect on the quantity of residual yolk or hatchling survival by the following spring. However, hatchlings that experienced future temperatures lost more mass over winter than those from the other treatments. These results correspond with previous work indicating that residual yolk does not fuel the energetic needs of hatchlings during winter. The effect of future warming temperatures on body mass may have negative consequences during energetically demanding activities during spring emergence and dispersal.

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来源期刊
CiteScore
6.40
自引率
12.10%
发文量
81
审稿时长
>12 weeks
期刊介绍: The official journal of the International Society of Zoological Sciences focuses on zoology as an integrative discipline encompassing all aspects of animal life. It presents a broader perspective of many levels of zoological inquiry, both spatial and temporal, and encourages cooperation between zoology and other disciplines including, but not limited to, physics, computer science, social science, ethics, teaching, paleontology, molecular biology, physiology, behavior, ecology and the built environment. It also looks at the animal-human interaction through exploring animal-plant interactions, microbe/pathogen effects and global changes on the environment and human society. Integrative topics of greatest interest to INZ include: (1) Animals & climate change (2) Animals & pollution (3) Animals & infectious diseases (4) Animals & biological invasions (5) Animal-plant interactions (6) Zoogeography & paleontology (7) Neurons, genes & behavior (8) Molecular ecology & evolution (9) Physiological adaptations
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