Culture techniques of puffer fish

Puffer fish is known as puffer fish, also known as puffer fish, bubble fish, belly fish, chicken bubble fish, Qinglangjun, dolphin fish, etc., which is called "three delicacies of the Yangtze River" with shad and swordfish. Warm-water marine benthic fishes are distributed in the western North Pacific Ocean. They are caught in all major sea areas of China, and fake Oriental dolphins often enter the waters of the middle and lower reaches of the Yangtze River and Yellow River. The dark-striated Oriental dolphin can also enter rivers or settle in freshwater lakes. Let's take a look at puffer fish culture techniques.

Culture environment of puffer fish

The sea area of puffer fish culture requires clean and rich dissolved oxygen, no occurrence of red tide, no pollutants and sewage inflow. Cage culture should choose the inner bay of shelter, transparency requirements of 7cm / s, flow rate of 10cm / s, and the optimum water temperature is 16023 ℃. When the water temperature is lower than 9 ℃ or higher than 28 ℃, it is disadvantageous to its growth.

Selection of puffer bait

The puffer fish often feed on fish, shrimp, crabs and shellfish, as well as insect larvae, Cladocera, copepods and higher plant leaves and filamentous algae. Puffer fish are used in juvenile stage, such as bran shrimp, shrimp, jade muscle fish, etc. in the mature period, in addition to sardines, mackerel and jade muscle fish, grouper, six-line fish, autumn saury and bamboo pod fish can also be used. in order to improve the quality of fish during harvest, squid, shrimp, oysters, clams and so on are sometimes fed.

Puffer growth overwintering

The puffer fish fry weighing 3-4 grams were placed in the cage from June to July, reaching about 400g at the end of December and more than 1000 grams at the end of the second year. The best listing specification of the red-finned Oriental dolphin is the highest price of 1kg. In order to achieve a better culture effect, the weight of forefish should reach more than 350 grams. Before December, the water temperature is suitable for growth, so it is necessary to feed enough bait. During the overwintering period, when the fish can still eat, it is also necessary to ensure a small amount of feeding as far as possible to prevent weight loss and ensure a stable survival rate. After overwintering, it began to return to normal growth in April.

Culture management of puffer fish

1. Before releasing seedlings, it is necessary to select seedlings with the same specifications, healthy and lively seedlings, and to understand the management status of the seedling stage and the presence or absence of abnormal seedlings.

2. Medicine bath must be taken before stocking to prevent parasites and other diseases from invading.

3. Large containers should be used as far as possible when transporting and transporting seedlings to avoid injury to the fry.

4. The best way to prevent cannibalism is to produce and use healthy seedlings. Healthy seedlings show cluster activities in cages and culture ponds, and the phenomenon of Jiao is not easy to occur in this state.

5. It is usually sorted twice from May to November, and when changing the net, it is best to connect the new and old nets together to make the fish move naturally so as not to scratch the fish.

6. The chilled bait had better be processed with ice to keep the food fresh and prevent the protein from deteriorating.

7. Fresh bait should be fed in the early morning to improve the enthusiasm of fish fry feeding.