CATDOLL : CATDOLL: What is the temperature tolerance of tilapia?

What is the temperature tolerance of tilapia?

Different species and strains of tilapia have slightly different lethal temperatures. The suitable temperature range for Nile tilapia is 16-42°C, the suitable growth temperature is 22-34°C, and the optimal growth water temperature is 24-32°C; the lethal temperature range is 10-12°C (8-10°C for Aurelia tilapia); the appetite of Nile tilapia decreases slightly at 14-15°C, and significantly at 13°C. The minimum water temperature for feeding is 11°C. The dominant breed of Aoni hybrid fish currently in farming, will die when the water temperature remains at 11°C for more than 1 week, or at 14°C for more than 2 weeks. The tolerance of GIFT tilapia to temperature is slightly worse than that of Aoni hybrid fish.

What are the temperature and salinity requirements of tilapia?

Tilapia is a tropical fish that cannot tolerate low temperatures. Its growth is closely related to temperature. Different species and strains of tilapia have slightly different lethal temperatures. The suitable temperature range for Nile tilapia is 16-42°C, the normal suitable growth temperature is 22-34°C, the most suitable water temperature for growth is 24-32°C, and the lethal temperature range is 10-12°C (8-10°C for Aurelia tilapia); Nile tilapia's appetite decreases slightly at 14-15°C, and its appetite decreases significantly at 13°C. The lowest water temperature for feeding is 11°C. When a cold wave comes, always pay attention to changes in water temperature and add a greenhouse if necessary. If the water temperature is low for a week (10-14°C), tilapia is prone to frostbite and death. The period after the weather turns sunny and warm is the most dangerous time for tilapia, and try to avoid stress on the fish. Avoid turning on aerators and other behaviors that stir the water layer, because the temperature of the upper water layer is lower than that of the lower water layer, and stirring the water layer further lowers the water temperature. Before the end of the year, some farmers choose to continue to store tilapia in ponds to extend the time to market in order to avoid low prices when the tilapia is put on the market. Pay special attention to changes in water temperature and keep a good balance to avoid freezing and death of tilapia. During that period, the cold storage of processing plants was basically saturated, and processing plants basically did not accept them, which would cause immeasurable losses to fishermen.

Tilapia is a euryhaline fish that can live in fresh water, brackish water, and even sea water. Different types of tilapia have different salt tolerance. Mozambique tilapia can live, grow, and reproduce in the sea; the highest salinity for the reproduction of Aurelia tilapia is 19, but after domestication, it can grow at a salinity of 36 to 53.5; the salt tolerance of Nile tilapia is worse than that of other types of tilapia, and it can only tolerate a salinity of 20 to 23. In addition, the tolerance of young fish to salinity is worse than that of adult fish. The new salt-tolerant variety, Jili tilapia, is suitable for breeding in water bodies with a salinity of 20 to 25. Since the commercial fish raised in salt water does not have a muddy smell, its quality is better than that raised in freshwater earth ponds.