Translation 2783

..... 271
; y^,my Sperm Whale (!rog ia. brevice-ns)
mi.-:?,^,tior.s of ;ïay s,: ?:-?i i,rl-ial es 1^_av: not been stud_i ed .
Str.andin;;s of taese ar,imal-s have been renorteâ fro:ïi the coasts of
Japan, Metiico, and the U.S.A. They feed on ceYïha.lo pods. Of f tne
coast of Ja.,)an they feed on fishes from depths of 250 metres or niore.
Their reT)rod.uction has not been studied. Active sper,►atogenesis was
observed i-: October in a male 298 cm in length. !.',o information on
their behaviour is available.
Pygmy snerr:i whales are not hunted. Oc-casional specir.rens are
found among small whales killed off the coast of Je.,Dan.
Their products are insi6-ni ficant. - The animals weigh no more
than ij.00 to 500 kg. According to some reports, ambergris has been
found in their intestines.
Goose-beaked ïr!hale (Zi-nhius ca.virostris)
Up to the present the biology of tiiese whales has been little
studied. Goose-beaked i•:hales feed. on cephalopods, in search of which
they make dives lasting for 30 minutes or even longer.
The feniales attain sexual.maturity at a length of about 5-5
^ ,, , ^ ,,^.,
metres, and the males at w:oï^ic:^,,t,.^a,^ snï^^^.^aÿ 1C17gtAA. 1 ^iG calves .^.re
born mostly in autumn, ti•rhen the embryo has attained a length slightly
less than half of that of the mother.
Hunting is on a small sca.le, and specimens taken are included
in the group "0ther". Goose-beaked whales are taken off the coast
of Japan almost all year round, but principally in summer (from May
to Septer:iber) near the peninsulas of Bose and. San-riku, both on the
1?a,ci.fic side of t'rie island of Ilonshu.
F rom 1948 to 1952 65 goosebeaked
whales were ta,lcen there, 51 being males and 34 females, and
in 1953 36 were taken. 1^iost of t.:ese were animals from 5.5 to 6.4
metres in length.
In a female 658' cm long, i:reiE^hing 2,952-5 kg, the weight of
flesh, blubber, and bones was 2,717 kg.
Porth -Pacific Giant !^ottle-nosed t•Jha.le- (73era.rdius bairdi) 178
The migrations of ti-ïese whales have not been investigated.
',hey are found. in J7.Ywariese waters in winter, but huntinL; of taeri
Û^,reral^.y be^;i.ris in A.^^râ.l, when they aut^roach tue coasts.
Sor:ie of
the a.ni;:.als sta^ t:,ere all su;nc?er, but otIners leave for colder