Translation 2783

...., 274
::ia!cint; lea Gher, and vc;,lucb]... l;cc^_ni ct,l 1^^-•oâucts are also obte.ined
from them. The flesh can be used as human food, and also in the
preparation of ineat-mcal for feedin;; to animals.
Common dolphin (vel_^^hizius del,,his)
The colouring of the North Pacific common dol;phin differs
from that of common dolphins in other regions in that it does not
z)ossess lateral and diagonal stri:)e-s. The transition from the light
colour of the lower nart of the body to the dark colour characteristic
of the up')er takes nlace abruptly, without passing
4
through intermediate hues.
The migrations have not been studied. Common dol-phins are
found in the Lower California region throughout the entire year, but
they are seen more often in winter and spring, together with North
Pacific white-sided dolphins. Their principal food items are pelagic
fishes, mostly Pacific saury and anchovies.
Their reproduction, like other aspects of thei-r biology, has
not been well studied. New-born calves 75-76 ciu long have been
reported, without lactatin£, fer:iales bein^ seen near by. The peak
of mating occurs from the middle to the end of summer. At that time
the weight of the males' testes increases markedly.
Common dolphins are often seen together with IRorth Pacific
white-sided dolphins in open waters. They sorneti:-aes dive to a dey^th
of 200 or 250 metres in search of food.
Cases of stomach ulcers have been recorded.
Common dolphins are taken off the coasts of Japan, but apparently
in small numbers -- no p:_ecise figures are available.
; iales 213 cm and 1;88 cie in len;t,.i, taken in August, weighed
90 kg and 80 kg respectively.
Pacific Bottle-nosed Do1i)hin (Tursiops gilli)
The biology of this d-oli^hi.n has not been adequwtely studied.
Seasonal migrations have been observed. These dolphins come to the
Goto Island region (southern part of the Sea of Japan) to produce
their your_L. -- both new-born calves and females about to give birth
have been recorded there. The new-born calves are about 120 cvi long.
The sto:.iaciis of dissected fe._tales have boeri found to contain
:nackerel, horse-mackerel, and cc-phalopods.