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Thermal acclimation dynamics of the Atlantic stingray, Dasyatis sabina.

机译:大西洋黄貂鱼Dasyatis sabina的热适应动力学。

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摘要

Thermal acclimation responses of Atlantic stingrays, Dasyatis sabina, were determined by reciprocal transfer of fish between 18 and 24°C or 24 and 30°C. The acclimation response ratio of fully acclimated fish showed that Atlantic stingrays gain or lose approximately 0.5°C of their thermal tolerance for every degree increase or decrease in acclimation temperature, respectively. Predictive models of thermal tolerance change over time (measured as Critical Thermal Maxima) suggest that stingrays are 75% acclimated by 9.5 days regardless of temperature transfer, or direction of temperature change. The largest acclimation changes were seen during initial transfers indicating an asymmetrical tolerance pattern, whereby stingrays gained or lost approximately twice the heat tolerance at lower transfer temperatures (1824°C) compared to the higher transfer treatments (2430°C). This novel pattern of asymmetric heat tolerance acquisition may be a key adaptation necessary for surviving rapid and extreme water temperature changes Atlantic stingrays commonly experience in their natural environment.
机译:大西洋st鱼Dasyatis sabina的热驯化响应通过鱼在18至24°C或24至30°C之间的相互转移来确定。完全适应鱼的适应响应比表明,大西洋黄貂鱼适应温度每升高或降低一度,其耐热性就会升高或降低约0.5°C。随时间变化的热容性预测模型(以“临界热极大值”度量)表明,无论温度传递或温度变化的方向如何,ing鱼都能在9.5天的时间内适应75%的环境。在初次转印过程中观察到最大的驯化变化,这表明不对称的容差模式,与较高的转印温度(2430°C)相比,在较低的转印温度(1824°C)下,黄貂鱼获得或损失的热耐受性大约是其两倍。这种新的不对称耐热公差模式可能是适应大西洋黄貂鱼在自然环境中经常经历的快速和极端水温变化所必需的关键适应措施。

著录项

  • 作者

    McKiddy, Emily Anne.;

  • 作者单位

    The University of West Florida.;

  • 授予单位 The University of West Florida.;
  • 学科 Biology.;Physiology.
  • 学位 M.S.
  • 年度 2016
  • 页码 44 p.
  • 总页数 44
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 F7-4;
  • 关键词

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