Can you raise clams in large pots or vats and tanks on the roof of your home?

The roof of your home can't be a big pot or a big bucket and vat to breed clams.

Clippers, also known as river corbicula, sand clams, etc., are widely distributed in China's lakes and rivers, rich in natural resources, they live in the mud underwater to plankton for food, fast growth, strong reproductive capacity, is an important small freshwater economic shellfish, in our country's large, medium, and small lakes have a wide distribution. In addition to natural resources, river clams are also suitable for artificial culture. River clam culture is suitable for lakes, large and medium-sized water surface releases, also suitable for small water surface or pond feeding, fertilizer farming, low cost of culture of river clams, high yield, easy to catch, can be the year of stocking the year harvest, the economic benefits are significant.

Culture technology

Culture water selection

River clams are best suited for breeding and growth in medium-sized waters with smooth water flow and often micro-flowing water, and require clear, non-polluting water and a certain degree of fertility, but not excessively fertile. Neutral or alkaline water quality is the most suitable water quality, the water color is light yellowish green or light greenish brown, the transparency requirement is 45 to 90 centimeters, the plankton is more abundant, and the flow rate is 0.2 to 0.6 m/sec. It is most suitable to have gyratory current in the aquaculture waters of river clams. Gyratory current can promote the reproduction and growth of plankton and is in a flowing state, which is convenient for river clams to feed on. If the current is too fast, it is not suitable for the growth and reproduction of river clams and the attachment of young clams; if there is no current, the feeding of river clams will be poor, the growth will be slow, and the yield will be low. The depth of the water in which the clams are cultured is 1.5 to 3 meters, and the bottom of the water has soft mud, so that the clams can absorb richer nutrients.

Control and cleaning of the water

We chose Lake Naruko for the suspension culture, which is an inland bend of the lake, with good water quality, suitable depth, low wind and waves, and no mixing with cyprinids and carp, which is good for data measurement and suitable for suspension culture. In most of the lakes, different fish species are cultured at the same time, and it is necessary to set up some fences around the water to block the fish, with a moderate size of the grid, to prevent some large fish from entering the area of the cultured clams, and if these facilities are not set up, the larvae of the clams will be eaten by the fish as bait. If the clams are cultured in a body of water where fish are generally raised, it is necessary to clean up the mackerel and carp, which are harmful to the clams, two to three years in advance, and to improve the quality of the water so that the body of water will have the conditions needed to satisfy the growth of the clams.

Collection of juvenile clams

The best time to collect juvenile clams is the first half of June every year, and the optimal depth of the water layer is 0.3 to 0.8 m. Although this is the peak time for clams to reproduce, the content of larvae on the surface of the lake is at its maximum, which makes it possible to collect as many samples as possible. Juvenile clams were collected by using the traditional form of netting, but due to the high winds and waves in the lake, the larvae attached to the netting were easily dislodged, resulting in a very small number of seedlings being collected, which was unsatisfactory. The method of wrapping small mesh fishing nets externally and stuffing large mesh sieve mesh internally to reduce the influence of hanging dirty phenomenon on the effect of seedling collection in the traditional net box harvester, meanwhile, the traits of the traditional net box were improved, and the effect of seedling collection was good.

Raising of juvenile clams

1. Rearing time

When the larvae of river corbicula's face plate grows into juvenile clams, the length of juvenile clams' shell is 5 to 12mm, and the weight of individual clams is 0.6 to 1g/pc, then the clams can be put into the nets to be raised on bamboo rafts. The time to put in seedlings is from March to April or from September to October.

2. Stocking density

The young clams are placed in the nets at a density of 250 to 300 per cage. Through experiments, this density is the most suitable for breeding density to maximize the effect of weight gain, and the operation should be skillful and quick to avoid hurting the young clams.

3, catch

Net culture and traditional culture of different ways of catching, net culture is more convenient to catch, just lift the net box, pour out the box of river clams can be, no need to row again to catch, it will be more convenient, fast, reduce the cost of labor and time costs.

4, appropriate seeding

When the growth of clams to the specifications of the difference is obvious, you need to separate the culture after catching, the specifications of the large in a pile, the specifications of the small in a pile, so that the breeding density is small, so that the clams can get more oxygen and bait, conducive to the growth of clams, and greatly improve the survival rate.

Daily management

The good or bad of daily management has a direct impact on the growth of clams. After the stocking of river clams, the water quality of the lake should be inspected frequently, and management measures should be formulated to do weekly checks and monthly inspections to ensure the stability of the net box and the integrity of the net coat, and the damaged net box should be repaired in time to prevent greater economic losses. Regularly clean up the nets to prevent other organisms from attaching and affecting the exchange of water inside and outside the nets. The way to clean up the net box is usually manual removal, high-pressure water gun flushing and so on.