Billiard fish artificial pond raising technology
Bullet fish, also known as jumping fish, flower jump, mud monkey. There are three kinds of common species, such as mudskipper fish, big mudskipper fish, and green-coated fish. It is one of the marine precious aquatic products, and is well-known both at home and abroad for its rich nutrition and delicious meat. The cycle of sling-bearing fish culture is short, and the commercial fish size can be reached within seven to eight months from seedling investment to growth. Moreover, the disease is rare, the survival rate is high, the long-distance transportation is tolerated, and the production risk is small, which is an emerging breeding industry worthy of development. Bullet fish is a warm coastal small fish. Because it is rich in muscles, it is good for jumping out of the water. Body length is generally about 15 cm. It inhabits the sandy mudflats or salty and fresh waters, and is good at crawling and jumping in shallow mudflats or at low tide. Usually lying on top of a muddy beach, if you are frightened, you can quickly jump into the water with a tail-stem spring, or dive into the cave to hide in order to escape the enemy. The suitable seawater density for mudskippers is between 1.010 and 1.020. The water temperature requires rapid growth at 24°C to 30°C, and it is not suitable for water temperatures in summer up to 32°C. In winter, the water temperature drops below 14°C to hide in the tunnel. The fish used for bombardment was mainly benthic diatoms, followed by zooplankton. The main points of the techniques for raising and raising fish by shellfish are as follows: 1. Selection of aquaculture pond: The bottom of the pool is required to be flat and higher than the low tide line, which facilitates fertilization and sun drying to promote the cultivation of benthic diatoms and breeding. Each aquiculture pond shall be constructed with one entrance and one exit gate. The bottom of the tank shall be slightly inclined towards the gate, and a gutter with a width of about 2 meters shall be created in the center to connect the gate for smooth drainage. In order to make holes for bombardment fish to inhabit and breed algae, soft clay is preferred as the bottom. The pond outside the pond should be higher, and conditions can be added to a purse seine facility to prevent fish and wildlife from being invaded. Fish pond area: Each pond is generally suitable for 7-8 acres. 2. Source of seed: First, natural seed. The breeding season of the mudskipper fish is generally from April to September, and the picking time is usually from June to August. Collectors use a small hand-held net to fish. Second, due to the rich resources of Taiwan's mudflat fish seedlings, they can be purchased from Taiwan. 3. Clearing and Disinfection: Before stocking, the first thing to do is to expose the bottom of the pool and remove the enemy from the clearing pool. Then infuse the fish pond with water, and then disinfect with a bleaching powder. Use 1.5 grams of bleach solution per cubic meter of water. The newly constructed aquaculture ponds can be applied with a total of 40 kilograms of mixed fertilizer for pigs, sheep, and cow dung per acre, and the depth of pool water should be 6-8 cm. 4 seedlings and density: buy more than 5 cm bombardment fish seedlings, generally in April after the fish ponds directly into the aquaculture, to about 25 per kg commercial fish specifications, you can capture. Seedlings density, generally put 3000 ~ 3500 per mu. 5. Fertilization and Feeding: After a period of careful feeding, benthic diatoms in the fish pond have basically disappeared, and the water quality begins to become cloudy. It should be timely drainage, drying pool and fertilization, and promote the reproduction of benthic diatoms. In the case of separate feeding, when mastering the seedling injection, the feed is fed once a week, and 50 kg of rice bran and 2 kg of feed additive are dispensed per acre. Pool water depth to maintain 8 to 10 cm. After 45 days of breeding, when it grows to 5-7 cm, a deeper hole is to be built. When the temperature is high, it is better to drain off the pool water in the sunny day, leaving some water in the ditch, and dry the sun for 3 to 5 days, depending on the bottom of the pool, it can be used to fertilize water and rice bran. When the sun cracks, the seawater is injected 5 to 10 cm. After one week, the adherent diatoms continue to multiply. Note: Regardless of manure or fertilizer, avoid direct flow into the channel, it is best to mix the manure with water and fertilizer, dilute with water and then inject, so as not to stimulate the bombardment fish inhabiting the hole. 6. Day-to-day management: First of all, when the weather is calm and sunny, drain and dry the pool. In case of cold winter cold, multiple water injections are suitable for maintaining water volume. Second, we must pay attention to harm. It is necessary to prevent the hunting and other damages caused by ferocious fish, birds, crabs and conch shells such as sea otters.