Texas Game and Fish, Volume 9, Number 4, March 1951 Page: 9
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When the fry are found, the jar is
lifted out (figure 7, carried to the
holding trough, and laid down in it
with the mouth of the jar facing the
incoming water. Some hatcheries
build screen boxes (figure 8) to set
the jars in; other hatcheries do not
use the boxes. The purpose of the
boxes is to keep the fry confined and
make it possible to remove them from
the trough with less chance of injury
when they are ready to go to the rear-
ing ponds.
Figure 9 shows some newly hatched
fry. As soon as they absorb their
yolk sacs, the fry are placed in a
rearing pond. Ponds that are four-
teen-hundredths of an acre in size are
stocked with one spawn, ponds one-
half acre in size are stocked with two
spawns, and ponds an acre in size are
stocked with three spawns.
In Texas the first spawns are ob-
tained by the 15th of April. Spawning
continues until the first part of Au-
gust. The eggs hatch in 5 to 10 days.
Feeding the Young
After the young fry are placed in
rearing ponds, artificial feeding is be-
gun. The fry are fed ground meat
scraps or tankage until they are de-
livered from the hatchery.
The young should be fed sparingly
at first and, if possible, in about the
same spot. At the start, about a 1-
gallon bucketful of meat scraps is
used for an acre of water. Within a
week or two, the young catfish will
"top" or surface when feed is cast on
the water. After they begin topping,
it is easier to judge how much feed to
give them. They should be given all
the feed they will clean up.
Should the fish stop topping for
several days, trouble-such as an out-
break of ichthyophthirius - may be
brewing. An outbreak of a disease
usually indicates that the young have
been underfed.
Two spawns of catfish in a half-
acre pond require about 3,500 pounds
of meat scrap over a period of three
and one-half months. This breaks
down to roughly 34 pounds of feed per
day, but considerably less than that is
fed at the start, and more and more
feed is given as the young fish grow.
Figure 8. Jars set in screen boxes (top
right) open ends toward incoming water.
Figure 9. Newly hatched fry.MARCH, 1951
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Texas. Game and Fish Commission. Texas Game and Fish, Volume 9, Number 4, March 1951, periodical, March 1951; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth1588346/m1/11/?q=%221951~%22&rotate=270: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.