Spontaneous daily torpor observed in the greater long-tailed hamster (<i>Tsherskia triton</i>)

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  • Masaki Mika
    Graduate School of Agriculture, University of Miyazaki Present Address: Department of Animal Pharmaceutical Sciences, School of Pharmaceutical Sciences, Kyushu University of Medical Science
  • Morita Tetsuo
    Faculty of Agriculture, University of Miyazaki Present Address: Department of Bio-resources, Division of Biotechnology, Frontier Science Research Center, University of Miyazaki
  • Koshimoto Chihiro
    Department of Bio-resources, Division of Biotechnology, Frontier Science Research Center, University of Miyazaki
  • Shinohara Akio
    Department of Bio-resources, Division of Biotechnology, Frontier Science Research Center, University of Miyazaki

Bibliographic Information

Other Title
  • キヌゲネズミ<i>Tscherskia triton</i>における自発日内休眠の利用
  • キヌゲネズミTscherskia tritonにおける自発日内休眠の利用
  • キヌゲネズミ Tscherskia triton ニ オケル ジハツ ニチナイ キュウミン ノ リヨウ
Published
2025
DOI
  • 10.11238/mammalianscience.65.9
Publisher
The Mammal Society of Japan

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Description

<p>To overcome severe environmental conditions such as cold or food shortage, many small mammals utilize hibernation or daily torpor. Hamsters (subfamily Cricetinae) are a well-known group using hibernation and daily torpor. Interestingly, among hamsters, hibernators tend to have relatively larger body sizes. In contrast, species that use daily torpor have a small body size, although some hamsters still remain unknown in torpor characteristics. In this study, we attempted to induce torpor in the greater long-tailed hamster (Tscherskia triton), which has a large body size among hamsters, by exposing them to condition that mimic winter (short photoperiod 8L:16D and low temperature 5°C). We successfully observed a spontaneous decrease in body temperature, and the duration of the torpor bout did not exceed 24 hours. Therefore, it was revealed for the first time that the greater long-tailed hamster is a heterothermic mammal that utilizes spontaneous daily torpor.</p>

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