In the autumn, the artificial breeding of eel fry using family clams and aquaculture ponds can adapt to the needs of spring stocking, shorten the fry cycle and increase yield. There are five tips for the artificial breeding of salmon in autumn:
First, the selection of fish to choose mature, weighing more than 500 grams of fish. The female squid has to enlarge and soften the abdomen, redness and congestion around the anus and genital holes; the male squid squeezes the abdomen with white semen outflow, and there is no swelling near the anus.
Second, male and female with a good selection of male and female fish, with a ratio of 1:5 to 7 to match. If you put more squid, you can speed up the estrus of female squid.
Third, hanging eggs spawning Male and female fish in the fish hanging in the water, and place the fish nest, the fish back approximately 3 cm below the water, in order to use differential temperature stimulation and micro-water stimulation to achieve its spawning. If 2 ml of 50% glucose is injected at the base of each pectoral fin of the female, the effect of spawning is better.
IV. Incubation Instructions 1 Do not over-fat the spawning and hatching ponds. If the water is more fat, it will cause the floating head of the fish, no spawning or spawning grains will be formed due to lack of oxygen in the fertilizer and water. The spawning pool and the hatching pond should be filled with fresh water, and it is better to keep the microfluidic water. The water temperature is preferably 18-22°C. 2 The production of ovaries should be smooth with roots, and false narcissus without mixed pulp is better. Cut stems and leaves to avoid sticking the eggs to sunlight. 3 Prevent males from eating eggs and increase hatching rate.
Fifth, artificial aphrodisiac to the artificial eel anchovy fish, can make eel spawn on time, increase egg volume. The specific method is: In the breeding season of carp, mature females are injected with 50% glucose solution. The injection site is at the base of the pectoral fin without fins. The needle is inserted at 45 angles. The injection volume is determined according to the weight of the female fish. Each injection is 3～ 5 ml. After the injection, the female parent fish is placed in the spawning pool, and then each female fish is equipped with two male fish. The spawning pool can be used to house the fish oysters to keep the microfluidic stimulation, and spawning is started 10-15 hours after the injection. The amount is generally about 40% higher than natural ovulation. The eggs of the squid are sticky eggs and need to be set up to produce ovaries. The ovaries use narcissus roots or aquatic plants, the eggs are attached to the fish nests, and the nests with the eggs are put into the saccharinized fish larvae for hatching. . It has been proved by practice that there are three advantages of using glucose as an artificial aphrodisiac to propagate salmon fry: 1 The method is simple, the cost is low, and it is suitable for widespread promotion in rural areas. The spawning of two kinds of fish is centralized and easy to manage. 3 The size of the fry is even and the fish body is strong. The survival rate after stocking is high and the growth is fast, which can win high yields.
First, the selection of fish to choose mature, weighing more than 500 grams of fish. The female squid has to enlarge and soften the abdomen, redness and congestion around the anus and genital holes; the male squid squeezes the abdomen with white semen outflow, and there is no swelling near the anus.
Second, male and female with a good selection of male and female fish, with a ratio of 1:5 to 7 to match. If you put more squid, you can speed up the estrus of female squid.
Third, hanging eggs spawning Male and female fish in the fish hanging in the water, and place the fish nest, the fish back approximately 3 cm below the water, in order to use differential temperature stimulation and micro-water stimulation to achieve its spawning. If 2 ml of 50% glucose is injected at the base of each pectoral fin of the female, the effect of spawning is better.
IV. Incubation Instructions 1 Do not over-fat the spawning and hatching ponds. If the water is more fat, it will cause the floating head of the fish, no spawning or spawning grains will be formed due to lack of oxygen in the fertilizer and water. The spawning pool and the hatching pond should be filled with fresh water, and it is better to keep the microfluidic water. The water temperature is preferably 18-22°C. 2 The production of ovaries should be smooth with roots, and false narcissus without mixed pulp is better. Cut stems and leaves to avoid sticking the eggs to sunlight. 3 Prevent males from eating eggs and increase hatching rate.
Fifth, artificial aphrodisiac to the artificial eel anchovy fish, can make eel spawn on time, increase egg volume. The specific method is: In the breeding season of carp, mature females are injected with 50% glucose solution. The injection site is at the base of the pectoral fin without fins. The needle is inserted at 45 angles. The injection volume is determined according to the weight of the female fish. Each injection is 3～ 5 ml. After the injection, the female parent fish is placed in the spawning pool, and then each female fish is equipped with two male fish. The spawning pool can be used to house the fish oysters to keep the microfluidic stimulation, and spawning is started 10-15 hours after the injection. The amount is generally about 40% higher than natural ovulation. The eggs of the squid are sticky eggs and need to be set up to produce ovaries. The ovaries use narcissus roots or aquatic plants, the eggs are attached to the fish nests, and the nests with the eggs are put into the saccharinized fish larvae for hatching. . It has been proved by practice that there are three advantages of using glucose as an artificial aphrodisiac to propagate salmon fry: 1 The method is simple, the cost is low, and it is suitable for widespread promotion in rural areas. The spawning of two kinds of fish is centralized and easy to manage. 3 The size of the fry is even and the fish body is strong. The survival rate after stocking is high and the growth is fast, which can win high yields.
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