Because of the long breeding season of crickets, the hatching time of larvae is also inconsistent, and the individuals vary in size. Each year, young larvae are hatched soon after the autumn, and some have not yet been able to feed and grow into hibernation. As the juveniles that have just hatched are young (normally about 4 grams), they are young, poor in feeding ability, and weak in disease resistance, resulting in higher mortality. How to increase the survival rate of children and nurses becomes a technical difficulty in raising children. The author after years of practice, summed up a set of effective methods of feeding children, are introduced as follows.
- Science feeding
Feeding juveniles requires the use of high-quality, fresh, nutritious, well palatable, and high protein foods. After the yolk sac is absorbed from the 2 to 3 days after hatching, it starts to feed. At this time, some small red worms, chironomid larvae, cocoon, cooked egg yolk and other foods can be fed. After feeding for 7 days, fresh pork liver, minced fresh fish, snails, and animal organs can be fed, and the conditions can be fed artificially. (Because wolfberry is rich in protein and various amino acids and minerals, Feeding quail feeding larvae is fast growing, low cost and high survival rate. Feeding larvae must adhere to the "Four Sets": that is, regular, fixed-point, qualitative, quantitative, and raise the juveniles' regular feeding habits. The high temperature season is fed once at 9 o'clock and once at 5 o'clock in the afternoon. After autumn, they are fed once a day and the feed must be placed on the food table near the water surface. The dining table can be set up 10 centimeters underwater with a plank or asbestos in a 25 degree slope. In order to avoid contention and biting during the juvenile feeding, several additional feeding points may be set up. The amount of food to be eaten depends on the actual feeding situation of the baby. When the water temperature is 25°C～30°C, the amount of feed can be used
Carcass weight 10% to 20%. The feed required was fresh, rot-free and mildew-free. Every day before the food is eaten, the food table should be cleaned and disinfected to prevent contamination of fresh feed and water pollution.
Second, strict water quality management
The juvenile skin is delicate and vulnerable to external mechanical damage. In addition, the newly hatched juveniles have bad habits of biting each other. In the case of high-density artificial rearing, they are vulnerable to bite. The injured juvenile suffers from poor water quality. In the pool water, it is easy to be infected and die. Therefore, raising juveniles requires the water quality to be tender, fresh, light green, non-polluting and pathogen-free. The transparency is generally about 25 cm and the pH is 7-8. Since the young and small ponds are shallow, the water is shallow (generally the water depth is 20 to 30 centimeters), the stocking density is high, and the water quality is easily corrupted. The water must be replaced within 2 to 3 days. The amount of water changed every time is l/3 of the total amount of water. about. Changing water temperature to raise
The water temperature in the cultivation pool remains the same. It is better to keep the greenish water. Some aquatic plants such as water hyacinths, water lettuces, and water peanuts can be placed in the culture ponds. This will enable the juveniles to grow under covert conditions, reduce juveniles' mutual biting and increase their survival rate.
Third, timely prevention and treatment of diseases
Before juveniles are stocked, they must thoroughly disinfect the culture ponds. It can be soaked with 10ppm bleach, or 150ppm quicklime. After 7 days, the new water will be put back. Disinfect the carcasses before hatching and use the 8ppm potassium permanganate for 20 minutes (water temperature 20°C). Or soak with 20ppm furazolidone for 25 minutes, or soak with 3% saline for 10 minutes,
Injured infants should be soaked in 2ppm malachite green solution or painted with gentian violet to prevent infection. Found that the disease must be promptly isolated treatment. Completely change the water in the disease pool, use 10ppm formalin to sprinkling, and targeted drug treatment.
IV. Management of hibernation
Wintering is a difficulty in juvenile breeding. Due to the small number of individuals hatched in the year (usually only 10 to 15 grams), there is less nutrients stored in the body, and the overwintering period is long, and the consumption is large, and it is easy to die due to weak constitution. When the natural water temperature is 20°C, greenhouses must be promptly transferred to the greenhouse for warming culture. In the absence of a greenhouse, when the water temperature is below 15°C, the fishermen will be transferred to the wintering pond in time. Overwintering pond should choose sunny, leeward, antifreeze insulation indoor or plastic shed, the bottom of the pool pad 20 cm of fine sand, and then into 10 cm of water, the quail quail with 20ppm furazolidone soak for 25 minutes per square meter put into the 200 There are ~250 animals and they will drill into the sand themselves. If the number of young children is not large, they can be put into the tank, barrel, pot, and filled with fine sand and water for the winter. During the winter to maintain the appropriate temperature (usually winter requirements of water temperature at 2 °C ~ 6 °C), to prevent indoor temperature when high, so as not to wake up from hibernation, not conducive to hibernation. The pool water does not generally need to be changed. If the water level drops, a little water can be added, but the water temperature must be the same as the water temperature in the wintering pool. When weather changes, antifreeze measures must be taken in time. Through many aspects of scientific feeding and management, after the hibernation has been hibernated, the general survival rate is about 95%.
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