The morning call. [volume] (San Francisco [Calif.]) 1878-1895, 1890-08-31

Ranbol0 Trout
when they come to the surface sucking air.
The attendant always keeps an eye out for
this, and when he detects the fry swimming
near The surface he scoops up the water
with his hand, and as it returns it carries
in with it a certain quantity of air, which,
being dispersed throughout the whole body
of water in very minute bubbles, is rapidly
absorbed.
A HIGH TEMPERATURE.
Il is thus demonstrated that high tenn
perature is fatal to many fishes, under arti-
fetal conditions, because unless the water
is artifcally charged with air it does not
afford them sufficient oxygen.
The young rainbow trout are hardy little
fellows and make a stubborn battle for life.
writer says that number of yearlings
are now in the aquarium in New York in
water the temperature OF which is 10.
They are healthy and lively and feed
with ayidity. 1t is quite possible, judging
from experiences related of the rainbow
trout, that this species of the salmon family
can be readily adapted to waters Of warmer
and more sluggish character than those
usually inhabited by them.
4 representative of The CALL, while
III ,ticating at klamath Springs recently,
had the pleasure OF an Introduction to Mr..
y
cries. That gentleman and his assistant.
Nj. Richardson, who supervIses the Shovel
Creek Hatchery, from which thousands of
eggs and young fry have been shipped this
year, showed the writer the entire workings
of the hatchery, the manner in which the
fish were stripped Of their spawn and the
Matching Of the eggs in the troughs, etc.
STOCKING STREAMS.
Nothing would give me greater pleas
ure," SAID the Commissioner, than to see
all II the beautiful streams adjacent to San
Francisco crowded with these handsome
aud gamy rainbow trout but, as matters
stand at present il would be a very difficult
task for ne to stock all of the streams be-
low unless some Of the gentlemen who re-
side in the immedlats vicinity of the creeks
would assist me in that undertaking"
In answer to question as to that which
he desired being done, MIR. WoOdberry said
that unless miniature hatcheres-which
could be erected at a very small outlay
were established on the margin of the
streams, 1t would be utterly impossible for
MIN 10 stock or keep in stock the many
streams which flow through the counties
adjoining this county
If the farmers and those who take
pleasure in angling" he continued "would
go 10 the nominal expense of having a
place for the depOsiting of eyed-eggs c0u-
structed, l could easily furnish them with
spawn, which requires only limited ex-
PtIlChNC III uNuulIuG W plONUNc luG oc5lEtu
results.
SHIPPING TROUT.
"Therei is very little loss or danger attached
10 the shipment of eggs when properly
handled in packing, but it is entirely differ
ent with fry, and it costs the commissioners
quite little sum to stock streams which
are couple Of days journey from the
hatchery"
. There are, no doubt, many sportsmen
who reside In the-neighbOrhoOd of pictur-
esque mountain streams who would be only
to happy TO erect batcheries from which
they could stock their streams with the
beautiful rainbow trout IL they had a
knowledge Of how to proceed. For those
who desire 10 propagate streams by the
artificial breeding of fish, The CALL pub
H,hes the following Instructions from an
article on hsh culture by Max Won Dem
Borne OF the General Fishing Association
OF Germany. which will be found both valu-
able and instructive, rs it briefly outlines a
simple method Of artificial fish breeding.
ARTIFICIAL BREEDING.
Artificial breeding has the following ad-
vantages: 4 much larger percentage Of the
eggs are Matched than would be the case if
left 10 nature, and il Is possible to protect
them and tile young against many dangers
that threaten them in free and open waters.
For breeding artifcially the following
kinds would do well: Salmon, trout, pike,
etc, also shad, sturgeon, smells and other
sea fish.
Many kinds of fish, among which may be
mentioned the trout, can be kept in ponds
until they are ready to deposit their eggs.
Where this is not feasible as in the case of
shad, sturgeon, ETC., the fish must be caught
when they have reached the necessary de-
yelopment. and when they are captured in
great quantities, as are the sbad in spring,
ample opportunity Is afforded for getting an
unlimited supply of eggs aud impregnatng
them. As by doing this the value of the
fish Is not decreased, and the impregnated
eggs are readily bought, it will be TO the
advantage of fishermen to impregnate the
ripe eggs and sell them to breeders.
But the roe, as well as the milt. Is fruitful
only when ripe. This can easily be deter
mined by stroking the fish from its head
backward under the stomach, with gentle
pressure. If the roe and milr are ripe they
flow freely. When they flow with difficulty,
further experiment is useless.
trout and salmon in captivity may be eX-
amlned weekly to ascertain their condition.
The ripe fish should be placed in two
separate vessels Of water, according to sex.
II will be well to take an equal number of
males and females, but in case of necessity
the milt from one male will be sufficient for
the roe from two females.
IMPREGNATING THE FISH.
When impregnating the fish, glass or
eartbenware basin should be used Into
this is stroked first the milt and then the
EOt, III SuiuCltuL 4uduLlby " cCfeT The
bottom of the dish. The milt and roe are
then mixed by carefully shaking the vessel,
after which water is gently poured down
the edge until the eggs are covered. The
water is renewed until the eggs are quite
clean and the mlt entirely removed. In
pregnation follows at the moment that
eggs, milt and water come together. The
eggs are then placed on the wire cloth
bottom C of the California trough, and
water is permitted to flow through without
interruption.
When impregnated eggs are to be sent
from distant hatchery, word as to the
time OF their arrival should precede them
by f0rty-eight hours. so that the receiver
may have ample time to be PREPARED for
them, and care should be taken that the
forwarding company is instructed to send
the eggs promptly in warm compartments.
On their arrival the cover is removed in a
cold room and the contents Of the box re-
peatedly dampened with the same water in
which it is intended to place the eggs
When this has been done, and the eggs are
of the same temperature as the water that
will flow over them in the Matching appa-
rstus. they are transferred into a larger
vessel filed with water and removed from
the packing material. After the eggs have
Been thoroughly cleansed and the dead
ones removed. they are placed In the
breeding trough by means OF ladle.
THE CALIFORNIA TROUGH.
For large eggs, with diameter OF perhaps
Inn a annaTatu9 IL rec