[N. S. VOL. XXXI. No. 784
FUR-SEALS DOMESTICATED
UNTIL a few months ago, no authenti
stance was on record of Alaska fur-seals.
(Callorhinus alascanus) being fed in captivity
and living for any length of time in other
than their natural environment. Apocryphal
tales exist on the Pribilof Islands of fur-seals
having been tamed and living thereafter in
the habitations of human beings on the is-
lands. In the early seventies, the Alaska Com-
mercial Company placed two immature live,
fur-seals, exact ages not definitely known, in
Woodward's Gardens in San Francisco, which
were confined within an enclosure, and which
died of starvation after several months' incar-
ceration, having eaten nothing during the
interval.
This experiment at Woodward's Gardens;
fixed the idea that fur-seals would not feed in
captivity. In view of this belief, it is specially
interesting to announce that Mr. Judson
Thurber, boatswain on the revenue cutter
Bear, has succeeded in inducing two fur-
seal pups to take food voluntarily and in
keeping them alive and well in captivity from
October 9, 1909, until the present time. A
brief account of this successful experiment is
given.
The effort had its inception in the desire of
FUR-SEALS DOMESTICATED
UNTIL a few months ago, no authenti
stance was on record of Alaska fur-seals.
(Callorhinus alascanus) being fed in captivity
and living for any length of time in other
than their natural environment. Apocryphal
tales exist on the Pribilof Islands of fur-seals
having been tamed and living thereafter in
the habitations of human beings on the is-
lands. In the early seventies, the Alaska Com-
mercial Company placed two immature live,
fur-seals, exact ages not definitely known, in
Woodward's Gardens in San Francisco, which
were confined within an enclosure, and which
died of starvation after several months' incar-
ceration, having eaten nothing during the
interval.
This experiment at Woodward's Gardens;
fixed the idea that fur-seals would not feed in
captivity. In view of this belief, it is specially
interesting to announce that Mr. Judson
Thurber, boatswain on the revenue cutter
Bear, has succeeded in inducing two fur-
seal pups to take food voluntarily and in
keeping them alive and well in captivity from
October 9, 1909, until the present time. A
brief account of this successful experiment is
given.
The effort had its inception in the desire of
3434 SCIENCESCIENCE
Dr. Fox, the surgeon of the Bear, to ascertain
whether the fur-seal carried ectoparasites.
For this purpose, a starving fur-seal pup,
whose mother had been killed while feeding
at sea, was given to the Bear's surgeon, who
was unable to discover any of the parasites
mentioned. The half-starved little animal was
then taken by Mr. Judson Thurber, the Bear's
boatswain, who desired to attempt feeding the
pup by artificial means. He was so far success-
ful in his efforts that he induced this pup to eat
dried fish from his hand and kept it in good
condition for three weeks, when it died in con-
vilsions. Desiring to carry the experiment
farther, Mr. Thurber obtained two well-con-
ditioned fur-seal pups, a male and a female,
from the Pribilof Islands on October 9, which
he induced to eat regularly and even greedily,
and which now are fat and in prime condition.
The chronology of the experiment follows:
October 9.-Two pups delivered to Revenue
Cutter Manning.
October 14.-Pups delivered by Manning to
Bear--did not eat between these dates.
October 19.-Female began eating solid fish.
October 23.-Male chloroformed and frenum
severed.
October 28.-Male induced to swallow a
little dried salmon.
November 2.-Male began to eat at will,
and on that date ate with evident relish nine
small fresh herring at Seattle.
Mr. Thurber began his experiments by
forcing condensed milk down the throat of
the starving pup first obtained. In doing so
he discovered that the animal experienced
difficulty in swallowing and attributed this to
the fact that the movement of the tongue was
restricted by the frenum. This Mr. Thurber
at once severed forcibly with his finger, upon
which the pup soon after began to eat fish.
After the death of this pup and his securing
the two others, the same impediment to the
free movement of the tongue was noted.
The female, it is stated, succeeded in breaking
the frenum by her own efforts and a few days
afterwards began to eat. The male being un-
able to do this, on October 23 he was chloro-
formed and his frenum cut. Immediately
after this, the male began to protrude its
tongue and to nose the fish in its enclosure, but
did not eat, possibly because no suitable food
was obtainable at sea. Upon the arrival of the
vessel at Seattle small herring were fed to the
pups and both animals ate greedily.
The female was by far the easier to feed,
was without food for only ten days and has
been in good condition during the whole of
her captivity. The male, however, was vir-
tually without food from October 9 until No-
vember 2, a period of twenty-four days, dur-
ing which time he grew thin rapidly and was
a pitiful sight beside his fat and sleek-looking
companion. Since he began feeding, how-
ever, he fattened daily and now is as well-con-
ditioned as the female.
The pups have been kept on board the Bear
in a box six feet long by three feet wide. At
first this box was filled with sea-water two or
three times a day. Now the box is kept filled'
with water during the day and is emptied at
night. They manifest no desire to leave the
water during the day and frequently sleep on
the surface. In the morning, when the box is
filled with water, they show every indication
of delight. They are very tame and, when not
in the water, will allow any one to fondle them
unless a quick motion is made, when they
will snap, but even then will bite gently if the
hand is allowed to remain quiet.
In conducting this experiment Mr. Thurber
used great patience and no little skill. He be-
gan feeding the animals by holding their
mouths open and pouring into their mouths
evaporated cream mixed with bits of fish.
The pups resented this, but small quantities
went into their stomachs. Later, Mr. Thurber
would tie bits of fish on the end of a string
and tease the animals until they would snap at
the fish. Then he would manage to poke the
fish down the seals throat and cut off the
string. In this way the female was taught
the taste for fish, after which she soon learned
to eat voluntarily.
These animals, the only captives of their
kind in the world, are now thriving on board
the Bear and it is hoped soon to bring them
to Washington, where they will be placed in
the large pool at the Bureau of Fisheries. Mr.
Thurber is entitled to all credit for his suc-
cess in demonstrating the practicability of a
measure hitherto believed impossible of ac-
complishment. The greater portion of the
foregoing data was furnished by Captain E.
P. Bertholf of the Bear.
The result of Mr. Thurber's experiment is
to establish the possibility of feeding fur-
seals in captivity. Incidential to this is the
interesting disclosure seemingly demonstrated
by three examples under observation that the
frenum in the fur-seal young at first opposes
an obstacle to their taking solid food, and
that its rupture is a prerequisite to their feed-
ing on other substances than mother's milk.
Should this be proved by subsequent experi-
mentation, the knowledge may open up a wide
field of endeavor, having as its object the
saving from death of those fur-seal nurslings
whose mothers have been killed at sea, and
which now die a lingering death from starva-
tion.
BARTON W. EVERMANN,
WALTER I. LEMBKEY
BUREAU OF FISHERIES,
WASHINGTON, D. C.