Page 40 - fish_farms_curriculum

Trout, a member of the salmon family, are cold water fish and prefer a water temperature of

10-18˚C. The optimum water temperature is 15˚C for trout. For this reason, trout can be
preferred for geothermal systems mostly in the northern regions of our country, in the cold

climate zone. Growth in trout slows down considerably when the water temperature rises

above 21 ˚C, and since the oxygen level will drop at this temperature, trout farming will reach
critical limits. (As the water temperature rises, the amount of dissolved oxygen will decrease).

Abbots need a more sensitive water quality compared to Tilapia and Carp, therefore the
aeration (oxygenation) of the water should be secured with spare pumps.

4.4. Catfish

Experiments on the production of catfish, whose commercial production has not yet started in

our country, continue. However, catfish fry, which are naturally found in the inland waters of
our country, can be collected from nature after the necessary permissions are obtained.

Picture 17. Catfish (Silurus Glanis)

The optimum growth temperature for catfish, which, unlike other fish, can survive at lower

dissolved oxygen concentrations is 25-28˚C. Reproductive activation begins at 22˚C and
occurs in spring. Offspring production is relatively difficult. There is no fry production in our

country, except for a few commercial enterprises. After obtaining the necessary legal permissions,
breeding can be done by collecting offspring from nature.

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