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Mesoplodon stejnegeri, Stejneger's beaked whale
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등록시간: 2008:02:10 16:10:10
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CMS: Mesoplodon stejnegeri, Stejneger's beaked whale
English: Stejneger's beaked whale
German: Stejneger-Zweizahnwal
Spanish: Zifio de Stejneger
French: Mésoplodon de Stejneger
Drawing of Mesoplodon stejnegeri
©
Wurtz-Artescienza (see
links
).
1. Description
Few animals have been seen alive. Stejneger's Beaked Whale appears
to be dark above and pale below, with the head and neck areas being
paler. In adult males two large erupted teeth point forwards near
the peak of the arched lower jaw. Both the largest male and largest
female specimens measured 5.2 m (Ward 2001).
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| Stejneger's beaked whale, Mesoplodon stejnegeri (True, 1885), (aka saber-toothed beaked whale, Bering Sea beaked whale, North Pacific beaked whale) ranges in length from 3-7 m, usually averaging longer than 5.3 m. Females are typically longer than males with a larger head. Adults of both sexes are dark gray to black and females usually have paler coloring on the ventral side. M. stejnegeri is distinguished from other Mesoplodon species by the shape and position of its 2 tusklike teeth located on the lower jaw, which are larger in male Stejneger's beaked whales. The bodies of the males are often scarred from the tusks, which are used during competitions for females during mating season. |
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