sentences:  The dog sleds ("ikamraq" sg "ikamrak" dual "ikamrat" pl in Yup'ik and Cup'ik, "qamauk" in Yukon and Unaliq-Pastuliq Yup'ik, "ikamrag, qamaug" in Cup'ig; often used in the dual for one sled) are an ancient and widespread means of transportation for Eskimo peoples, but when non-Native fur traders and explorers first traveled the Yukon River and other interior regions in the mid-19th century they observed that only Yupikized Athabaskan groups, including the Koyukon, Deg Hit'an and Holikachuk, used dogs in this way.Both of these peoples had probably learned the technique from their Iñupiat or Yup'ik Eskimo neighbors.Non-Yupikized Athabaskan groups, including the Gwich'in, Tanana, Ahtna and other Alaskan Athabaskans pulled their sleds and toboggans by hand, using dogs solely for hunting and as pack animals.