(Continued from Pago BIO)
fish living in it because of its lack
of oxygen.
That’s just one aspect to the
school’s aquaculture program.
According to Harold Dietrich,
ag science teacher at Twin Valley,
fish were raised in the 1,500 gallon
indoor “pond” in the aquaculture
facility at the school. The facility
will be undergoing renovations in
the summer. The tank was home to
a variety of species, including
large-mouth bass, catfish, blue
gills, and tilapia, said Dietrich.
Some fish were supplied by
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Twin Valley Aquaculture Students
Kurtz’s Fish Hatchery in Elverson.
The tilapia were “grown ourselves
in tanks,” said Dietrich.
The tilapia are grown for about
three months in 20-gallon to
50-gallon tanks. Then they are
moved to the “raceway”—a large
capacity, narrow tank that takes
them to market size (some more
than 12 inches long). Some can be
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In the I,SOO-gallon pool, before
it was drained to make way for
renovations, about 80 tilapia made
their home, along with 30-S0 cat-
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fish (sold to Shady Maple Super
market in Blue Ball). The tilapia
still remaining in the raceway mea
sure about 6-8 inches long and
were placed there last fall.
The catfish marketed to the
supermarket lake about two years
to grow. Tilapia make a better fish
to market because they can be
brought to market sooner—about
a year to a year and a half, accord
ing to Dietrich.
With the renovations to take
place at the facility, the pool, with
a 1,500-gallon capacity, will have
improved temperature. Where
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temperatures were once kept at 63
degrees during the winter, keeping
them wanner at 70 to 80
How old Is Stumpy? Amy said you can tell by the rings on
the shell. Each “ring" or block denotes a year in the life of
the turtle. On Tuesday this week, with help from fellow
aquaculture student Angela Brent, Amy Kline used a scrub
brush to take off some algae tank buildup from Hs outer
shell. They counted the blocks —l4 to be exact —on the
shell.
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fish faster. New electrical lines
(Turn to Pag* BIS)