the two types of the duck-whales is named in the English "Bottle-Nosed Whales", since steeply the forehead-part particularly with old males through high protuberances of the upper jaw-bones over the beak-shaped one(s) (duck-whale)!), rises long muzzle.
Whale-advice As a greasy substance, the so-called whale-council, is in the connective tissue of the forehead with the Pottwal. With increasing age and particularly with male duck-whales, this mass becomes waxy solid.
Types The southern duck-whale (Hyperoodon planifrons) moves as far as to Australia's west and South-coasts from the South-Atlantic. The northern duck-whale (Hyperoodon ampullatus) or Dögling, as it is also named frequently, are to frequently be found in the North-Atlantic (particularly at Iceland and north of it) during the summer-months. In the winter, it moves until before Africa's northwest-coast southwards.
Whale-catch Since adult bulls become approximately 7,5 m long until 9 m and female duck-whales, has against end of the 19. Jahrhunderts the Scotsmen (from 1877) and the Norwegians (since 1882) the continuances of these whales strongly gezehntet. A male animal of 9 m of length and 6 m of scope delivered approximately 2 tons of oil and 100 kg of whale-advice.
Since the hunt for the Greenland-whale rewarded no more and North-caper was for a long time almost wiped out anyway, the Norwegians concentrated on the Dögling so that 70 catch-boats carried off 3000 duck-whales in the year 1895 alone. one single ship of the Norwegian catch-fleet only had remained in 1927. Only 1973, Norway, that possessed the monopoly of the duck-whale-catch practically, adjusted the hunt to the Dögling - mainly for economic reasons.
Way of life As a squid-hunter, duck-whales dive without effort into big depths; normally, they remain under water 10-20 minutes. If however, Döglinge are harpooned, so they dive very fast and can endure long under water, an animal is supposed to have dived 2 hours; Times by 1 hours more frequently are reported.
Injured duck-whales are supported by its Artgenossen and are defended, so that they one in troops of approximately 10 animals of living Döglinge without big chase after the other from shelf of the big catch-ships from could be shot.
The hikes of the duck-whales, with whom many can meet hundred animals, are to be possibly led back also on hikes of its loot-animals.
Reproduction From March to May, the boys come to the world after one year of Tragzeit, they then are approximately 3 m long. Initially, one has dread duck-whales until black upper side and one somewhat lighter stomach-side. Already as young, they can have stains sallow or white, old animals often are fully yellow until white. With such old duck-whales can be the tooth-pair well visibly at the top of the lower jaw, while the gum hides the small teeth with younger animals. Stunted teeth frequently are hidden in the gum of both jaws. The skull of the duck-whales is strongly asymmetrical, the left nose-walk admittedly is strongly from-locked up, finishes blindly, however; only the right one leads to the Blasloch.
Endangering The northern duck-whale is led since 1976 in the red list of the IUCN (international union to the protection of the nature) as endangered and stands under protection since 1977. From the southern duck-whale, there are not any usable continuance-estimates, however one assumes that it in the Antarctica to the south of the 58. It is degree's of latitude the most frequent beak-whale.
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