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The first season of freshwater pelicans will be listed on the market from July 15 to 30. The average size will be about 600 grams. The second season will be listed on October 5-15 and the average size will be about 480 grams. When catching freshwater fish in the first quarter, attention should be paid to the use of large-eye nets, and the freshwater white mullet species in the second season must not be harmed.
In the Pearl River basin and its areas south of the river, the stocking of freshwater whitefish species can be appropriately reduced, for example, the double-season feeding test of the Zhanjiang Fisheries Academy breeding group, the wintering fish species with a tail weight of 12.17 grams in the first season, and the second season stocking. The current fish species with a tail weight of 16.67 grams is stocked with 80 pieces of large-sized squid with a tail weight of 200 grams and 33 pieces of squid per acre, or 80 pieces of small-size squid with a tail weight of 75 grams, and 33 pieces of squid. A total of 210 tails of 50 tilapia were weighed, 120 tails of MacGregor were weighed at 10 grams; or 500.2 grams of tail fish were on average each summer, and other fish that had reached food specifications were caught. General yield per acre of 690 kg, net production of 630 kg. The weight gain of freshwater pelicans was 43 times in the first quarter, 26 times in the second season, and the survival rate was above 90%, which achieved significant benefits.
All freshwater white mullet species stocked in the two seasons require regular specifications, robust physique, complete fins and no disease. The fish should be sterilized with 2% saline or 30mg/L potassium permanganate solution before the fish pool is underway to kill pathogens on the fish body and play a role in the top defense against diseases.
Freshwater whitefish species stocking
Taking Nanjing as an example, in the first quarter, freshwater white winter fishes were stocked at the beginning of May. The average stocking size was 50-60 g. The stocking density was 500 or so per acre, and the other one was about 60 catfish. The specifications were About 500 grams of tail weight, about 20 squid, specifications for the tail weight of about 700 grams, from the role of regulating water quality. The freshwater whitefish have been listed in the middle and late July, and they have also been listed and sold. The freshwater white bream species stocked in the first season were intensively cultivated with early-stage seedlings, and fish species with a size of 20-30 g were placed on July 20th. Stocking density is 500-600 acre per mu, and the other is about 2,000 seedlings of squid and squid with a size of about 5 cm. The ratio of carp and squid is 1:4. The freshwater white pods of this season are all listed on or about October 15.