CATDOLL : CATDOLL: What water quality is suitable for spawning California bass?

1. What water quality is suitable for spawning California bass?

California bass prefer an environment with fresh water and sufficient dissolved oxygen. Pay close attention to changes in water quality. Maintaining good water quality is an important part of breeding work. Regularly inspect the pond. If you find that the water quality is not good, add oxygen or inject fresh water in time to maintain sufficient dissolved oxygen.

The best place to spawn is in still water, with a slight current and fresh water. After induced spawning, the male fish will first build a nest, and the female and male fish will automatically mate and occupy the nest. The eggs are sticky, and the female parent fish will lay the eggs on a net or pebbles to stick them, and the male fish will guard the egg mass.

Reproduction method:

The breeding season of largemouth bass is from March to June, and the peak spawning period is in mid-to-late April. The suitable temperature for reproduction is 18-26℃, and the optimum temperature is 20-24℃. The sexual maturity age is generally 1 year old, but the reproduction effect is better in 2-year-old and 3-year-old individuals.

The male fish uses its tail to dig a hole, builds a nest, and lures the female fish into the nest to lay eggs. After the female fish lays eggs, the male fish chases her away, and the male fish is responsible for guarding the fertilized eggs while they hatch. A male fish weighing 1 kg can carry 40,000 to 100,000 eggs.

The eggs are sticky, but the stickiness is weak. The eggs that have lost their stickiness sink. The diameter of the eggs is 1.22 to 1.45 mm. They can lay eggs many times in a year. When the water temperature is 22 to 26 degrees Celsius, the incubation time is 31 to 33 hours.

California bass prefer an environment with fresh water and sufficient dissolved oxygen. Pay close attention to changes in water quality. Maintaining good water quality is an important part of breeding work. Regularly inspect the pond. If you find that the water quality is not good, add oxygen or inject fresh water in time to maintain sufficient dissolved oxygen.

The best place to spawn is in still water, with a slight current and fresh water. After induced spawning, the male fish will first build a nest, and the female and male fish will automatically mate and occupy the nest. The eggs are sticky, and the female parent fish will lay the eggs on a net or pebbles to stick them, and the male fish will guard the egg mass.

Things to note during the spawning period of California bass

1. Strengthen internal nutrition and health care

In the breeding of California bass, especially during the spawning stage, it is necessary to add the Ulanbao + VC product for a long time. The yucca saponin in Ulanbao can increase the length and thickness of the villi in the intestines of California bass, promote intestinal health, and enhance the absorption and utilization of nutrients.

2. Increase oxygen intake

Depending on the weather, water quality and feeding conditions of the California bass, the aerator should be used rationally to ensure sufficient dissolved oxygen, which is beneficial for the bass's feeding and growth. Especially during the spawning stage, sufficient dissolved oxygen can significantly promote the ovulation of the bass and reduce mortality.

2. Can largemouth bass reproduce naturally in the country?

Can.

Largemouth bass mainly inhabits shallow waters of lakes and ponds with relatively warm water temperatures. It has a wide adaptability to salinity and can live not only in fresh water, but also in brackish water with a salt content of less than 10%. It can reproduce naturally if conditions permit.

3. Freshwater bass tastes particularly good. How should freshwater bass be farmed?

For freshwater perch breeding, each pond has an area of ​​8-15 mu, and requires a flat pond bottom, sandy mud bottom, firm pond bank, and a water depth of more than 2 meters. A pond that is too small and too narrow will cause a lack of dissolved oxygen and make it difficult to produce; a pond that is too large and too deep is not suitable for production operations. The pond is rectangular, and it is better to face north and south. The best water quality is well water, which has been tested to be pollution-free and meets the standards for fishery water use. The pond needs to be equipped with inlet and outlet pipes, which is conducive to regulating water quality and providing fish with a good growth environment. The best pond for breeding perch is a dry pond, dredged and exposed, especially an old pond.

The seedlings should be disinfected half a month before release, and 50 kg of quicklime or 20ppm bleaching powder should be applied per mu for disinfection. The pond can be put into water after 7 days. Pond conditions The area of ​​the adult fish breeding pond should not be too large, 1'5 mu is appropriate, sandy loam bottom, less silt, flat pond bottom, slightly inclined to the drain, 1.54 meters deep, complete drainage and irrigation system, sufficient water, fresh water, no pollution, good water quality. The pond is dried and sun-dried, and about 10 cm of water is added 10'15 days ago. 80'100 kg of quicklime is used per mu, and 5 kg of bleaching powder is added the next day. The whole pond water is splashed and the pond is disinfected. Kelp bait is a highly predatory bait and can be eaten with minced fish, frozen small fish or wild fish pieces.

After taming, the sea bass can be fed with pellet feed. Before feeding, the sea bass are first sprayed with water to form a conditioned reflex, and then the pellets are added. After repeated training, the sea bass will swim in groups as long as they hear the sound of water splashing. Choose a middle place, jump into the water 6-7 meters away from the pond bank with bamboo and wooden boards, and set up a bait throwing point. This bait throwing point has a large area of ​​bait throwing and bait withdrawal area, which is not easy to make the fish muddy water when feeding, and can accommodate more fish to eat evenly.

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When breeding, you must choose high-quality varieties and nutritious feed. You should also learn professional breeding techniques, pay attention to the cleanliness and hygiene of the water, change the water source regularly, keep the water full of oxygen, remove weeds in time, and avoid polluting the water source.

First of all, you should prepare a clean pond. The pond should be cleaned in advance and have a clean water source. When planting freshwater perch, do not plant it too densely. Do a good job of shading and preventing escape. Only in this way can you breed freshwater perch well.

You need to choose a suitable place for breeding and suitable water quality for breeding. You must pay attention to the cleaning of the water quality, pay attention to cleanliness and hygiene, pay attention to the selection of varieties, pay attention to temperature, pay attention to density, and spray some quicklime on the bottom of the pool.

4. What impact will unstable weather have on the reproduction of California bass?

March to May is the peak breeding season for California bass, and also the peak season for stocking in previous years. March is the transition period between winter and spring in southern China, and the weather is unstable, with sudden changes from warm to cold, which has a certain impact on the breeding of California bass and raw fish, and has also delayed the stocking of farmers.

1. California bass: low spawning rate, price will increase in half a month

Although it is common sense that spring is the peak breeding season for California bass, the temperature in the Pearl River Delta region is relatively high, and the first batch of fry has been produced in the seedling breeding farm in mid-January. However, from mid-February to now, there have been occasional cold waves, which have had a serious impact on the hatching of California bass fry. California bass breeding requires a relatively stable environmental temperature, preferably 15-25℃. Water temperature outside this range will cause the broodstock to be unfertilized. The recent unstable weather has led to a very low fertilization rate of California bass broodstock, only 10% to 20%. As for the price of fry, there has been no significant change compared to January, and the price of 1-1.5 cm fry remains at 130-150 yuan per 10,000 tails. Despite this, the low fertilization rate and low survival rate have caused a large reduction in the supply of fry, which will lead to an increase in the price of California bass fry. "The fry we hatch now are not enough to supply our old customers. There are farmers who want to buy the fry that are less than 1 cm in size." Master Deng predicts that the number of California bass fry in Shunde District will be reduced by about half this year. With the arrival of the peak season for stocking fry, the price of California bass fry will rise significantly in half a month.

Unstable temperature, delayed seedling season: Unstable temperature not only troubles California bass seedling breeding farms, but also delays the seedling stocking actions of most farmers. Because California bass seedlings under 3 cm are very sensitive to temperature differences, they are often stressed by the arrival of cold waves and sudden drops in temperature. For example, if the water temperature drops below 15°C, a large number of seedlings will often die. In order to solve the problem of low survival rate of California bass fry, many farmers choose to buy fry (8 to 10 days old) that have been marked thick in seedling breeding farms and release them. Brother Ji, the person in charge of the Lecong Agricultural Office, told the author, "It is understood that during the Spring Festival, many fish were frozen to death because the weather was too cold. Now the weather is unstable, and many farmers dare not rashly buy fish and release them to avoid losses. Large-sized seedlings will be better adaptable to the environment and have a higher survival rate."

2. Raw fish: Feed price increase + poor market conditions make farmers hesitant

The situation of raw fish is similar to that of California bass. It is in the hatching stage and has not yet reached the peak season for seedlings. A raw fish feed distributor in Xingtan, Shunde, revealed that it is expected that seedlings will be available in mid-April. However, due to the sharp increase in feed prices since last year (the 40-jin/bag of raw fish extruded feed has increased by about 10 yuan/bag this month), coupled with the less than ideal price of raw fish last year, many farmers are still hesitant about whether to continue breeding raw fish this year. From the above situation, affected by factors such as unstable weather, feed price increases, and government land acquisition, both California bass and raw fish have not yet reached the peak season for seedlings. It is expected that by the end of March, after the temperature gradually stabilizes, farmers will gradually implement the seedling action. It is recommended that farmers currently focus on pond cleaning and water diversion, so as to "wait for fish in the pond" to facilitate the smooth development of the next stage of work.

It will be affected by temperature, weather, this kind of influence, the influence of the surroundings, and water sources.

California bass need a relatively stable temperature to breed, preferably 15-25 degrees Celsius. Water temperatures outside this range will result in fertilization failure of the broodstock. The recent unstable weather has resulted in a very low fertilization rate of California bass broodstock, only 10% to 20%.

In recent years, the price of California bass has continued to rise, especially the off-season breeding and early batch breeding of California bass, which have considerable profits and are highly sought after. Compared with spring and summer, winter breeding has obvious advantages. First, the weather is stable, without typhoons and rainstorms. Second, the temperature is suitable for the reproduction of bait organisms, and it can avoid the high temperature causing the proliferation of algae.