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Image from page 35 of "Yosemite nature notes" (1922)

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説明Identifier: yosemitenatureno316unitrichTitle: Yosemite nature notesYear: 1922 (1920s)Authors: United States. National Park Service Yosemite Naturalist Dept Yosemite Natural History Association Yosemite Naturalist DivisionSubjects: Natural history National parks and reservesPublisher: [Yosemite National Park, Calif. : Yosemite Natural History AssociationContributing Library: Prelinger LibraryDigitizing Sponsor: Internet ArchiveView Book Page: Book ViewerAbout This Book: Catalog EntryView All Images: All Images From BookClick here to view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:g on thecomplished in a humane manner through severity of the winter. They hibernatethe use of a large, iron cylinder, mounted alone, except where cubs of the year oc-n trailer wheels. There is a trap door cupy the den with the mother,in one end, and the bear is enticed into As a rule, bears do not eat or drinkthe trap by bait. The trailer can then be during the hibernation period. The break-coupled to a car and transported to a ing down of the fatty tissues built upmore remote spot in the park where the during the previous fall sustains life,bear is released/1 However, they have been observed out- In 193 8, a very large male bear was side their dens during mild winters. Sev- captured in the above manner. This gar- eral observations recorded by Yosemite * The material on bears is largely an abridgement of Bears of Yosemite by M. E. Beatty, YosemiteNature Notes 22 (I). January 1945. Mr. Beatty is now (June 1952) Chief Naturalist in GlacierNational Park. 84 YOSEMITE NATURE NOTESText Appearing After Image:Photo by AlgerianThe bear trap. naturalists have indicated that, at thislatitude, bears sleep rather lightly duringhibernation. * It has been generally supposed that hi-bernation was to enable the bears toescape the cold weather of the wintermonths. Observations in Yosemite indi-cate, however, that the availability offood during this period is the chief con-trolling factor. It is believed that late June is thetime when most Yosemite bears mate.Cubs are, for the most part, born aroundthe latter part of January, or early Feb-ruary, while the mother is in hiberna-tion. Cubs are generally born in pairs,although triplets or even solitary cubs.ire not uncommon. Rarely there arequadruplets. At birth, they are extremely tiny,weighing less than a pound. Their growthand development are at first very slow.In one case, it was 31> days before thecub opened its eyes. The nursing periodlasts tor about six months, but the cubswill be with the mother their first year,usually hibernating in the sameNote About ImagesPlease note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
撮影日1922-01-01 00:00:00
撮影者Internet Archive Book Images
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