Viviparous fish
The anal fin of a male viviparous fish usually develops into a genitalia called a copulator, through which the male fish sends * * * into the female fish. When the water temperature of the aquarium is kept at the general tropical water temperature, the pregnancy is about one month. After a month, the larvae can take care of themselves when they are put into the water. Some common viviparous females can maintain a state of * * * in their bodies, and they can hatch fish one after another without mating again. Such as guppies and swordfish, these fish are called viviparous fish. Fish that can't be stored in the body (viviparous fish) have to mate again every time they hatch, and various developing larvae absorb nutrients through the placenta.
Sprinkle eggs
This is the simplest method of spawning and reproduction (or oviposition): fish eggs are usually discharged into the water by the female fish after the sharp chase of the male fish, and the male fish ovulates the female fish. Fish eggs are fertilized by male fish, but only those that drift with the tide or fall into water plants and pebbles can survive. Other eggs will soon be eaten by other fish and even their parents; So fish usually lay a lot of eggs to increase the possibility of survival.
Hide eggs
Fish that lay these eggs live in waters that dry up once a year. The survival of fish depends on whether fertilized eggs can withstand the harsh reality of being waterless for several months, and then dive back into the water to hatch when the rainy season comes. The eggs of ornamental fish must be collected some time before the water is cut off, and then preserved in a semi-state
lay eggs
This kind of fish will protect the eggs after laying eggs. They carefully lay their eggs on the back of leaves, in caves or on upside-down plant leaves. Use the flat surface of open water or the abdominal sac unique to male fish to store fish eggs. Fish guarding eggs and larvae naturally swim in pairs.
Oral incubation
The fertilized egg is stored in the throat together with the mother color hatched in the mouth, and after a few weeks, the offspring color is hatched. After the larvae can swim by themselves, the mother fish will feed them. But once in danger, the fish will still return to the mother's mouth to take refuge. There is no special requirement for hatch, only a separate fish tank is needed. Male CYPRINIDAE fish in the Grand Canyon area have oval spots on their anal fins. When the female fish touches these spots, it can urge the male to have sex.
nest
Tropical fish build nests in various forms, some dig holes in the sand and some spit bubbles to build nests. However, first build a bubble nest with saliva, then lay eggs at the bottom of the nest and fertilize it, and then put it into the nest. Different kinds of fish have different bubble nests. Some float into a piece, and some pile up under the leaves of aquatic plants.
Ornamental fish culture
In order to cultivate excellent larvae, healthy parent fish with excellent color, fins and size must be selected for breeding. Special nursing, paying close attention to the change of water quality, feeding live bait or fish grass from time to time can cultivate the best larvae. Some fish have special requirements for water quality when they are cultured. Pay attention to prevent parent fish from swallowing their eggs or larvae. Fish lovers can estimate the number of larvae according to the smooth spawning and provide enough food for the larvae.
Separate parent fish
It is best to prepare a separate fish tank for mating, and the water condition in the tank can be adjusted without interfering with the mating of the fish in the tank. Too little water in the tank will increase the risk of fish eggs being swallowed. If some shrub-like aquatic plants are arranged in the color tank, or a layer of pebbles or marble is laid on the bottom of the tank to cover the fish eggs, the fish eggs can be prevented from disaster. Floating aquatic plants can also provide shelter for young fish, and they can swim freely when new eggs are laid. The male and female parent fish are separated before breeding, so as to increase the possibility of breeding after the parent fish (especially spawning fish) reunite. Male fish that lay eggs have bright colors, long fins and slender bodies.
Question 2: How to watch grass carp breed? Watch it reproduce after mating.
Question 3: How to breed ornamental fish;
Friends who have just started to raise ornamental fish have this experience. Buy back the fish and put it in the fish tank. Everything was fine in the first few days. After a few days, I saw that the water was muddy and the fish had faded. I didn't know the fish was sick until I asked. "What? Will fish get sick? " With a grain of salt, I invited a doctor and gave medicine. My wallet hurts badly. I spent a lot of time, and my hair may turn white. Finally, every fish saw Lao Mao. Bite your teeth and buy more. For a few days, I got sick again, cured again, died again, bought again, and went on and on. Unconsciously fall into a strange circle. Finally, there is a feeling that fish farmers who can't cure fish are not good fish farmers. Ha ha. Think about it. Am I wrong?
This is a beginner's problem. Everyone will commit a crime. Not surprising. It is strange that some people can't extricate themselves. Caught in the strange circle of Dr. Fish and couldn't get out. It is believed that raising fish is to treat fish constantly.
In fact, raising fish is the same as raising children. The important thing is not to treat them, but how to prevent them from getting sick. That is, to prevent diseases. There will be small defects in the way of recovery of sick fish, which will reduce its ornamental value. Besides, your favorite fish always greets you sick, and I don't think your mood will be better. Right?
So how can we keep the fish from getting sick? The most important thing is to raise water. In other words, maintain the hydrological environment in the aquarium. At least let the fish, beneficial microorganisms, harmful microorganisms, nutrients and harmful compounds in your aquarium reach a certain balance. If it is an aquatic plant box, the role of aquatic plants in the hydrological environment should be added.
Harmful microorganisms in the aquarium mainly refer to pathogens such as viruses and bacteria. Harmful compounds are various inorganic salts produced in water, such as phosphate and nitrite, which will do harm to fish. In addition, feed live bait to friends who admire fish (such as water lice, filariasis, blood worms, etc.). ) long-term capture from nature will inadvertently bring in some organisms and pathogens (such as fish lice, cat head lice, viruses, etc. ) is basically the main cause of diseases of ornamental fish cultured in aquariums.
Compared with rivers and lakes in nature, aquariums are much smaller and more isolated. The high fluidity of water in nature makes all kinds of harmful salts there quickly washed away by the current, and a large number of elements in natural water will also neutralize some harmful salts. The wide water body in nature also makes this fish have a wide range of activities. In order to survive, they have to run around for food and avoid predators. The chances of infection and invasion by pests will be much smaller. Then, in view of these points, we can make a plan to prevent diseases.
First of all, there should be fewer big fish in the fish tank. That is to say, the density of fish farming should be relatively small, and 1cm fish should be raised per liter of water. This breeding density is the experience summed up by many predecessors. You can lower the density a little.
Second, the arrangement of filters. Some friends will only buy an air pump when they start raising fish. If you think the water is short of oxygen, pump it up. If it is turbid, change it. It doesn't matter whether you buy a filter or not. This idea is very dangerous. As we said in the colorful article on captive equipment, the filtration device in the present sense refers to biochemical filtration. It is no longer simply removing impurities from water. It is a method to establish a good circulation system and improve the hydrological environment by eliminating harmful substances in water through microorganisms. This is a system that must be prepared. In my experience, the gap between filter channels should be bigger and longer. The impurities are filtered by coarse cotton filter for the first time, and then filtered by nitrifying bacteria attachment groups such as biochemical cotton filter, biochemical ball or ceramic ring, so that nitrifying bacteria attached to it can play a role. Then the harmful elements such as chlorine and cadmium are removed by activated carbon filtration. Finally, filter it with a cotton filter and put it back in the aquarium. This kind of filtration is my experience in raising fish. Because, in order to save money, I usually don't use the finished screen, but set up my own filtering device. This will be much cheaper.
Third, the speed of water flow is higher. It depends on the kind of fish. You raise fish in warm water or even still water. You can't wash it with big water, can you This means that the circulating water flow is as large as possible on the water flow it can bear. To simulate natural water flow.
Fourth, lazy people can't raise fish. Fish farmers must develop good habits and monitor and check the water quality and the living conditions of fish every day. This job is boring. But you have to do this. Carefully check the hydrological indexes such as pH value and nitrite content of water. Observe the body of the fish. The shape and movement of fish are different ... >>
Question 4: How do ornamental fish breed freestyle?
There are many ornamental fish that randomly spawn and breed. In the pursuit of male and female fish, the fertilization process is completed in a short time. For fish that produce sticky eggs, Hypericum can be used to receive eggs. It is best to plant a variety of aquatic plants, otherwise the fish eggs will stick to the inner wall of the culture tank. For ornamental fish that lay non-sticky eggs, it is also helpful to place some aquatic plants, because they can protect eggs and prevent them from being swallowed by parent fish. After spawning, the parent fish should be fished out as soon as possible, and then the fish eggs can be transferred to clean water or hatched in the original pool, but the possibility of fish eggs being infected by germs will be greatly increased. But generally speaking, after young fish can move freely, they can leave the pond wall and the surface of aquatic plants to feed freely. At this time, they only need to put bait suitable for young fish, such as paramecium and water Sao. The ornamental fish that have been bred freely mainly include: red and white dandruff, red and white tiger head, red and white scales, red velvet balls, toad head blisters, red nose fish, red blisters, red pearls, traffic lights, red-headed hats, red pearl longan, yellow sky and so on.
Ooembryo reproduction
Ooembryo reproduction is a special way of reproduction. Egg-embryo fish do not lay eggs, but directly give birth to small fish. People used to call this kind of reproduction viviparous. Strictly speaking, this name is not appropriate, because the small fish does not contact the mother fish through the placenta before birth, but is fertilized in the mother through its own eggs and develops by its own nutrition. Embryo reproduction is relatively easy and does not need special management. It should be noted that male and female fish of the same species must be used as parent fish. Generally speaking, the ratio of male to female should be kept at 1: 3 ~ 1: 4. The aquaculture pond should be large, and a variety of aquatic plants should be planted. After putting the parent fish into the culture pond, feed them with proper live bait every day to keep the water clean. When the abdomen of the female fish is swollen and there is a fetal point, the male fish can be fished out, and when the female fish is prominent and close to production, the female fish can be fished into a special culture pond for viviparous fish. Newborn larvae will soon swim freely, and when the yolk sac disappears, they can be fed with screened Daphnia. Ornamental fishes propagated by eggs and embryos mainly include Jin Mudan, Tetranychus urticae, Green Peony, Monochrome Fish, etc.
Oral incubation and reproduction
Taking care of fish eggs by oral incubation is called oral incubation. Parent fish should be selected before breeding, and the ratio of male to female should be kept at 2:4 to obtain better breeding effect. First, put them in a culture tank filled with water with adjusted hardness and pH, and after feeding for a period of time, they will naturally lay eggs. After laying eggs, the female fish will leave the fertilized eggs in her mouth until the young fish hatch. At this time, the female fish will bring enough oxygen to the fertilized egg with proper breathing frequency. After the larvae hatch, the care of the parent fish is still not over. They should continue to take care of the larvae' food until they can act independently. During this period, the parent fish will stop foraging and always be alert to the surrounding environment. Especially when in danger, the parent fish will open their mouths to let the larvae swimming nearby escape and provide them with hiding places. This way will continue until the young fish can move completely independently. At this time, it is necessary to add food to the young fish in time, such as paramecium and Daphnia. The ornamental fish cultivated by oral incubation mainly include: black dragon fish, red arowana, arowana, arowana and so on.
Bubble nest propagation
The method of protecting fish eggs by building special ovaries before breeding is called nest rearing. Thanks to the protection of the nest, the safety of fish eggs and newly hatched small fish is reliably guaranteed, thus improving the reproductive survival rate. To cultivate this kind of ornamental fish, we must first provide nesting materials. Some floating aquatic plants, such as Eichhornia crassipes and staghorn grass, can be put in the culture pond, and only in this way can fish eggs be prevented from being swallowed by parent fish. Because most of these eggs are floating eggs, when floating eggs emerge from the water, they are easily swallowed by parent fish. Ornamental fish bred in nests have strict requirements on the environment in Zhou Wei. Generally speaking, they need a quiet environment, and the ratio of male to female should be kept at 4:5, so as to obtain the best reproductive effect. Before laying eggs, the male will build a bubble ovary. When laying eggs, the male fish lures and drives away the female fish under the bullous ovary, and then wraps his body around the female fish. Female fish excrete eggs and male fish fertilize them. Male and female fish will bring them from the water into strong bubbles and gather together. The responsibility of maintaining the young fish falls on the male fish, who will protect the silence in the nest from being destroyed. This kind of work will continue until the young fish can move freely. At this time, paramecium should be fed to the young fish first, and then Daphnia should be fed as food. Ornamental fish that breed by nesting mainly include: Jane ... >>
Question 5: What kind of ornamental fish breeds quickly and abounds in egg-laying fish such as peacock, swordfish, Mary, moonlight, etc. It is good to raise and look good. 1. Peacock fish, also known as peacock flower and rainbow, is called "anchovy" and "torch" in some parts of Northeast China. It is a tropical fish in the suborder of plant kingdom and plant kingdom, and it is difficult to raise. Venezuela, Barbados, northern Brazil and Guyana, native to South America, were introduced as ornamental fish to Singapore, China, Japan, South Korea, the United States and many European countries (such as Russia and Germany). 2. Swordfish (Xiphophorushellerii.var), also known as red sword and swordfish, is an order (CYPRINIDAE), a kind of freshwater ornamental fish cultivated artificially, which is loved by people because of its red color. 3. Moonlight fish is an important species of tropical fish. It is as small as guppies, colorful and attractive. Moonlight fish is 4~6 cm long and has strong adaptability and reproductive ability. Its characteristic is that it can cross with swordfish and breed new varieties. Common moonlight fish species are: red moonlight fish, blue moonlight fish, red-finned golden moonlight fish, golden-headed moonlight fish, double-finned moonlight fish, sail-finned moonlight fish, golden-headed sail-finned moonlight fish and so on.
Question 6: first of all, the cultivation of ornamental fish.
Some fish are fried directly.
Have a plenty of eggs.
So you have to be clear first.
What exactly did you ask?
What kind of tropical fish is it?
Question 7: How do ornamental fish breed quickly? Don't be quick, it's better to let nature take its course. Forced labor will affect the quality of future generations.
Question 8: When will ornamental fish breed after sexual maturity?
Ornamental fish refers to fish with ornamental value. They are distributed all over the world, with more than a thousand species. Some live in fresh water, some in seawater, some from temperate regions and some from tropical regions. Due to the differences in the original living environment of ornamental fish, the time required for sexual maturity of various fish is different.
For example, fish living in Africa, once the dry season comes, the fish originally living in the stream will inevitably * * * on the riverbed because of the dryness of the stream, so the life of the fish will eventually end within one year. They can mature sexually and lay eggs as long as 2 months after hatching.
For example, if the adult is more than 2.5 meters in length, it will take 4-5 years for sexual maturity to start breeding.
Question 9: How to breed ornamental fish vests? Trichogaster leeri is a common freshwater tropical ornamental fish, which is native to Thailand, Malaysia and Indonesia. Its taxonomic status is Perciformes, Perciformes and Hairy Foot Perch. There are also two kinds of tropical ornamental fish in this genus-Blue Samsung and Blue Manlong, and the shape of pearl vessel is slightly smaller than that of Blue Samsung and Blue Manlong.
type
1, preparation and male and female identification of parent fish
After 10 months of feeding, the body length of Pinctada can reach more than 6cm, and the gonads begin to mature. According to the author's observation, the second-year-old fish with a body length of 6 ~ 8 cm has the highest reproductive success rate, and individuals with a body length of 10cm or more may have passed puberty, but the reproductive success rate is low (the life span of the pearl tail fish can exceed 5 years in a good aquarium environment).
2, spawning environment
Before breeding, the male and female parent fish were isolated for more than 20 days and fed with live bait such as Daphnia. During breeding, a pair of parent fish are put into a spawning pond with the size of 0.5m× 0.4m× 0.3m ~ 0.8m× 0.5m× 0.4m, and the water temperature is controlled at 25 ~ 30℃ (preferably1~ 2℃ higher than usual); Do > 5 mg/L, pH 6.8 ~ 7.5, water hardness 5 ~ 10 DGH. The fertilized eggs of pearl mackerel are floating eggs, which need foam nests when hatching. Therefore, some aquatic plants floating on the water surface should be placed in the spawning pond to concentrate the foam spit out by the male fish, which is beneficial to the formation of foam nests. Although the male fish with well-developed gonads can spit foam without the tank angle of aquatic plants, the diameter of the foam nest is larger after placing aquatic plants, which can generally reach 5 ~ 8 cm; Moreover, aquatic plants can induce the parent fish to quickly enter the state of * * *. Because aquatic plants must be strictly disinfected and sometimes rot due to insufficient light, the author replaces aquatic plants with foam blocks with a diameter of about 5 cm, and the effect is good.
3. Reproductive behavior
Male fish with well-developed gonads start to spit foam to build nests within 1 ~ 3 days after entering the tank, which usually takes about 2 ~ 5 hours to build nests, and then start chasing female fish; At this time, the color of the male fish becomes very bright, and the color of the female fish is brighter than usual. The male fish trembled and danced in front of the female fish. If the gonads of the female fish are well developed, they will cooperate with the male fish after several chases, and sometimes even the female fish will actively chase the male fish. In this case, if the male fish is smaller than the female fish, reproduction often fails, or the female fish cannot lay all the eggs. If the gonad of the female fish is immature, the female fish will avoid the male fish everywhere. At this time, the female fish must be removed in time, otherwise the female fish will be injured.
The male fish leads the female fish under the foam nest, curls his body around the female fish, and then both of them discharge sperm and eggs with their stomachs up. So many iterations can produce all the eggs, and the fertilized eggs are wrapped in foam. Generally, females with a body length of 6 ~ 8 cm can lay1000 ~ 2,000 eggs, with an egg diameter of about 0.5 mm. ..
Step 4 hatch
Male fish have the habit of protecting eggs and will take care of eggs in foam nests and newly hatched larvae. When an egg falls from the foam nest, he will immediately catch it with his mouth and then spit it out and put it in the nest. At this time, the male fish will keep the female fish away from the foam nest and will always drive the female fish away. In order to avoid female fish injury, the female fish should be taken out in time after spawning. The author's method is to remove the male and female fish after mating and spawning, and let the fish eggs hatch separately; After 1 d, the light-colored eggs turn black, and after 1d, the larvae break out of the membrane; About 1 ~ 2 days after hatching, the yolk sac of the larvae basically disappeared and the larvae began to swim horizontally for food.
Question 10: Can domestic ornamental fish breed small tropical fish in fish tanks? Yes, the most typical guppy. There are four kinds of large tropical fish: fish, big pearl, emperor, half set and black gold.