Crucian carp is an important farmed fish in my country. It is an omnivorous fish that mainly feeds on plants, likes to live in groups, and is selective about its food and habitat. So how big can a crucian carp grow in a year? Let's take a look.
1. How big can a crucian carp grow in a year?
A crucian carp can grow to about 50g per year, depending on factors such as species and rearing environment. In the wild, crucian carp grow relatively slowly, only gaining about 30-50g per year. In ponds with ample food, crucian carp can grow to about 150-200g per year.
II. Crucian Carp Farming Methods
1. Preparation for breeding
(1) It is essential to select a suitable aquaculture pond. For example, build the pond in a sheltered, sunny, and well-drained area, drain the water from the pond, expose it to the sun for a few days, disinfect it with quicklime , and then release the water.
(2) Choose the species to be farmed. You can choose a species with a fast growth rate according to your needs. High-backed crucian carp is a good choice.
(3) The protein content of the feed must reach more than 30%, and the feed must be of high quality.
2. Seedling release
(1) Low water temperature will affect the survival rate of seedlings. The water temperature must be stable above 10°C when releasing the seedlings. In order to facilitate sales and breeding, the seedlings cannot be released in several batches. The seedlings must be released at once, which makes breeding inconvenient.
(2) Before releasing the seedlings, in order to reduce the chance of common diseases, the seedlings must be disinfected. In addition, releasing the seedlings too densely is not conducive to growth. Generally, about 2,000 seedlings are released per mu. They can also be raised together with other fish species, and the breeding effect is more obvious.
3. Water quality management
(1) Crucian carp are rich in calcium and phosphorus, which are 2-3 times higher than those of other fish. Therefore, in order to meet its growth needs, it is necessary to ensure the calcium and phosphorus content of the water during breeding. Calcium phosphate and lime solution can be applied once every half month.
(2) Other trace elements are also essential. If necessary, microalgae or duckweed can be cultivated in the pond. Organic fertilizer must be applied according to changes in water quality.
(3) Change the water promptly if the water quality is too poor, and pay attention to changes in water quality at high temperatures.
4. Feeding Management
(1) The feed must be in line with the preferences of crucian carp. Crucian carp are omnivorous fish that feed on plants. They should be fed 6-8 times a day. When feeding, they should be fed in small amounts and frequently. Each feeding should not be too much.
(2) In spring, crucian carp feed less and the temperature is lower, so the feeding frequency can be reduced. In summer, crucian carp feed more and the temperature is high, which is a period of rapid growth, so the feeding frequency and amount must be increased.
5. Disease prevention and control
(1) Disease prevention is the main focus. The diseases of crucian carp include red gill disease, hepatobiliary syndrome and saprolegniasis. If these diseases are not treated in time, they will lead to the death of crucian carp.
(2) In order to reduce the possibility of disease, quicklime should be sprayed regularly for disinfection and sterilization.
