Tilapia is not tolerant of low temperatures. In the late autumn and early winter, when the water temperature drops to 15°C, it cannot continue to grow. In fact, tilapia culture ponds can only be used for half a year (5-10 months). Salmon is different. It does not stop eating during the winter and it can continue to grow. It only reduces the food intake and the growth rate slows down. The use of tilapia breeding ponds to raise octopus during the idle period, this stage is a cheap seed, rich bait fish, squid raised to the following year in May, the price is relatively high. Many years of production practice have proved that the practical technology of using tilapia ponds to raise squid can effectively increase the production rate of ponds, and the efficiency per acre is more than 3% higher than that of a single cultured tilapia or squid. Its specific technology is as follows:
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1. Tilapia rearing Tilapia up until August-September, most of them have reached the market specification (about 400 grams per end) and can be harvested and listed. To dry ponds in late October, stocks of puffer fish are stocked for 10 days after clearing the pond with lime. The specification is 300-400 grams per tail, and the stocking capacity is 300 fishes per mu. The fingerlings in front of the fish ponds are disinfected with salt mixture.
2, feeding feed
In early November, when the eel ponds were fed with bait fish at the same time, the scale was 25-50 grams of cheap fish such as clams and breams, and 150 kilograms per mu of water was started. Gradually increase the amount of feed.
The feeding amount is: feeding every 7-10 days before the end of February; feeding 2 times every week from March, feeding 15-20 kg per acre; each month according to the weather Feeding amount. Ensure that the ratio of carp and bait fish tails is 1:5-10. The density of bait fish is too thin. On one hand, squid is not enough to eat, and on the other hand, it will consume too much physical strength due to predatory bait fish, thus affecting growth. The density of bait fish is too high, and it can easily cause anoxic floating heads. In order to ensure the year-on-year growth of uneaten bait fish, appropriate amount of cakes should also be fed.
3. Fertilization and Water Quality Control Aquaculture commercial squid requires a rich dissolved oxygen and fresh water. In winter 15-20 days, fresh water should be filled 1 time, each time 10-15cm deep, spring water 7-10 days, each time 20-30cm deep, to ensure that dissolved oxygen in water is kept at 4mg per liter. Above, the transparency remains above 40 cm.
4. Disease prevention and treatment The carp has strong disease resistance, and basically no disease occurs in the breeding process. Before the squid enters the pond, it is disinfected with a medicinal bath to avoid sickness entering the pool. Feeding bait fish should also be maintained during the feeding process to ensure sufficient feed.
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