Translation 2783

dive aga.i n.
.... 249
if a wha.le stays under water for one or two minutes it
emerges slowly, both head and back appearing almost simultaneously.
The rate of movement is not high, and when the whales are
undisturbed it rarely exceeds five or six knots. They are not afraid
to corne into the surf zone, and they have been observed in water
three ôr four metres deep. They usually occur in small groups, but
sometimes concentrations of several tens of the animals are observed..
Their chief parasites are whale lice, which usually settle
on prominences on the snout and lower jaw and also around the uro--
genital orifice.
their internal parasites.
Several helminth species have been recorded among
;,Ihaling ships began to hunt I^^:orth Pacific right whales early
in the 1°401s, and within 25 or 30 years th^y were almost comple.tely
killed off. Several thousands of them were taken. The killing of
them is now totally prohibited. Their nLunber was estimated at 300
in 1971.
Each whale yielded up to 15 or 16 tons of oil and about 0.5
ton of whalebone. The-ir flesh was also used as food. Males 11.6
and 12.4 metres long wei,7•hed 22.90 and 22.25-tons respectively, and
a female 171.4 metres long weighed 106.5 tons.*
t•'hen large baleen whales are weighed in parts, up to 816
of the total weight is lost as blood; with sperm whales the corresponding
loss is up to 12L,:) of the total weight.
Grey Whale (^;schrichtius ,;ibbosus)
Grey whales survive only in the northern part of the Pacific
Ocea.n. they were exterminated in the northern pai!t of the Atlantic
before the 18th century. There are two herds there: the Asiatic
(Okhotsk-iiorea.n) and the American (Chukotsk--Californian), with
diffèrent migration routes.
The grey whale's of the Asiatic herd are seen in the Ulsangmang
Bay region (South ILorea, 35 0 35' A!) by the end of November.
The first to arrive from the north are pregnant females, followed
in December by whales of both sexes. Migration of the whales to the
north begins in February. Some of them remain a long time to feed
in iCorea. Strait, between South Korea and Tsushima Islând. The migrating
whales pass through Tatarskii Strait into the Sea of Okhotsk