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Mesoplodon stejnegeri:   (click for more)

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FAO Names
En - Stejneger's beaked whale, Fr - Baleine à bec de Stejneger, Sp - Zifio de Stejneger.
3Alpha Code: BJW     Taxonomic Code: 4220200313
Diagnostic Features
Stejneger's beaked whale has the characteristic Mesoplodon body shape. Apparently, both sexes are uniformly grey to black, often with extensive scarring in bulls.

  The flattened tusks of males are situated near the middle of the lower jaw, and point forward. They are located on raised prominences, so that the crowns extend above the rostrum. 
Can be confused with: Adult males will be distinguishable from most other Mesoplodon species by tooth shape and position. Within Stejneger's beaked whale's range, both Hubbs' beaked whale and Blainville's beaked whale males have similar teeth.

Geographical Distribution
Stejneger's beaked whales are found in continental slope and oceanic waters of the North Pacific Basin, from southern California, north to the Bering Sea, and south to the Sea of Japan. This appears to be primarily a cold temperate and subarctic species. It is most commonly stranded in Alaska, especially along the Aleutian Islands.
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Habitat and Biology
Groups of 5 to 15 individuals have been observed, often containing animals of mixed sizes.Stejneger's beaked whales are known to feed on squid.
Interest to Fisheries
Several Stejneger's beaked whales are known to have been taken in salmon driftnets off Japan, and there have probably been occasional direct catches of this species off Japan and possibly elsewhere.

IUCN:  Insufficiently known.
Source of Information
Marine mammals of the world. Jefferson, T.A., S. Leatherwood & M.A. Webber - 1993. FAO species identification guide. Rome, FAO. 320 p. 587 figs. . 
 
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