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首页> 外文期刊>Polar biology >Increased blubber cortisol in ice-entrapped beluga whales (Delphinapterus leucas)
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Increased blubber cortisol in ice-entrapped beluga whales (Delphinapterus leucas)

机译：冰层白鲸（Delphinapterus leucas）中的脂皮质醇增加

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摘要

Entrapments of whales in sea ice occur occasionally in the Arctic and often last several weeks or months, resulting in emaciation or death of whales. These events provide a unique opportunity for investigating the physiological response to a prolonged or chronic stress in an otherwise healthy population of marine mammals. By measuring cortisol in blubber, a peripheral tissue, we expect to see a reflection of long-term or chronic stress rather than short-term or acute stress. Adipose tissue should be less subject to rapid changes compared to blood cortisol, reflecting stressors experienced over a longer period of time, and should not be affected by potential stress associated with sampling. We measured blubber cortisol of 29 beluga whales (Delphinapterus leucas) entrapped in November 2006 in Husky Lakes basin and 26 whales from the same population (Eastern Beaufort Sea) during regular seasonal harvests in July of 2006 and 2007. Mean cortisol concentrations (+/- SEM) were seven times higher in blubber from entrapped whales (1.76 +/- 0.32 ng/g wet weight) compared to whales from regular seasonal harvests (0.26 +/- 0.042 ng/g wet weight) and appeared to increase with whale age. Our results provide a measure of blubber cortisol from a prolonged stress and demonstrate blubber cortisol as a useful indicator of longer-term exposure to stress in beluga whales.
机译：北极海冰中鲸鱼的夹带偶尔发生，并且通常持续数周或数月，导致鲸鱼消瘦或死亡。这些事件提供了一个独特的机会，可以研究在其他方面健康的海洋哺乳动物种群对长期或慢性应激的生理反应。通过测量润滑脂（一种周围组织）中的皮质醇，我们希望看到长期或慢性压力的反映，而不是短期或急性压力的反映。与血液中的皮质醇相比，脂肪组织应较少受到快速变化的影响，这反映了较长时间的压力源，并且不受与采样相关的潜在压力的影响。我们测量了2006年11月在赫斯基湖盆地捕获的29头白鲸（Delphinapterus leucas）的脂皮质醇，以及2006年7月和2007年的常规季节性收获期间来自同一种群（东博福特海）的26头鲸的脂皮质醇。平均皮质醇浓度（+/- SEM（SEM）是捕获的鲸脂（1.76 +/- 0.32 ng / g湿重）的脂糊的七倍，比来自常规季节性收获的鲸鱼（0.26 +/- 0.042 ng / g湿重）高七倍，并且似乎随着鲸龄的增加而增加。我们的结果提供了对长期压力下的脂皮质醇的测量，并证明了脂皮质醇作为长期接触白鲸的应激的有用指标。

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  • 来源
    《Polar biology》 |2016年第9期|1563-1569|共7页
  • 作者

    Trana Marci R.; Roth James D.; Tomy Gregg T.; Anderson W. Gary; Ferguson Steven H.;

  • 作者单位

    Univ Manitoba, Dept Biol Sci, 50 Sifton Rd, Winnipeg, MB R3T 2N2, Canada;

    Univ Manitoba, Dept Biol Sci, 50 Sifton Rd, Winnipeg, MB R3T 2N2, Canada;

    Univ Manitoba, Dept Chem, 594 Parker Bldg, Winnipeg, MB R3T 2N2, Canada;

    Univ Manitoba, Dept Biol Sci, 50 Sifton Rd, Winnipeg, MB R3T 2N2, Canada;

    Univ Manitoba, Dept Biol Sci, 50 Sifton Rd, Winnipeg, MB R3T 2N2, Canada|Fisheries & Oceans Canada, 501 Univ Crescent, Winnipeg, MB R3T 2N6, Canada;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Delphinapterus leucas; Glucocorticoid; Steroid hormones; Stress;

    机译：翠雀;糖皮质激素;类固醇激素;应力;

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