Efficient cultivation of Pelteobagrus fulvidraco in miniature cage
Pelteobagrus fulvidraco cultured in ponds with other aquatic species has the advantages of simple operation, low investment, easy feeding, fast growth and high benefit, so it is a high-yield feeding method to improve the utilization rate of water surface.
1 net cage setting
The cage is stitched with polyethylene mesh, which is 2m long, 2m wide and 1.2m high. The mesh is 0.5~1cm. The cage adopts a closed stretcher floating type, the bottom uses 9-purpose mesh cloth as the cushion, the edge of the cushion is high 20cm, in order to reduce the loss of bait, the upper part of the cage is about 30cm above the water surface. A square plastic basket with high 10cm and side length 30cm made of 18 mesh polyethylene window screen is used as a dining table, which is placed in the middle of the box, with one in each box. The cage is set at the inlet of the fish pond, and there are 3 fish ponds per mu (667 square meters). Cages can also be set in spacious waters with fresh water quality, sufficient dissolved oxygen, shelter from the wind and sun, and no pollution, arranged in a "one" shape, with a box spacing of 4m and a row spacing of about 10m. Transplant water hyacinth or water peanut which accounts for about 2 / 3 of the cage area.
2 fish fingerling restocking
The cage was launched 1-2 weeks before the fingerling was released. Fish species are required to be disease-free, injury-free, physically strong and neat in specifications. There are 100,150 large size yellow croaker fingerlings with a tail weight of about 20g per square meter.
3. Feeding and management
3.1 Feed
Common baits include small miscellaneous fish, snail clam, @ # @ 254 fish, silkworm pupa, viscera of livestock and poultry and animal blood, which are fed regularly, positioned, qualitatively and quantitatively to ensure that yellow croaker can eat well and grow rapidly.
3.2 Pipe water
Keep the water quality fresh and sufficient dissolved oxygen. Observe the activities of the fish every day and check whether the cage is damaged, fish out the sick fish and dead fish in the cage, and keep the water in the cage clean. Clean the cage once a week to ensure the normal exchange of water inside and outside the cage. Adjust the height of the cage in time when the water level changes.
(4) Disease control
Soak the cage with bleach solution for 30 minutes before entering the water; wash the fish with salt solution before entering the box to kill surface bacteria and parasites; sprinkle and disinfect the whole box with raw lime water every 10 to 15 days; regularly hang bags with the mixture of copper sulfate and ferrous sulfate; bait made of antibiotics for 2 days every 20 days or so.
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Sashimi
The Japanese call themselves "thorough fish eaters". Japan's fish catch ranks first in the world, but it also imports a large number of fish and shrimp from abroad every year, eating more than 100 jin of fish per capita a year, exceeding rice consumption. Japanese eat fish raw, cooked, dried, pickled and other ways to eat, and sashimi is the most expensive. The highest etiquette is to entertain sashimi at state banquets or civilian treats. The Japanese call sashimi "Shashimi". The general sashimi is made of skipjack, snapper and sea bass. The most high-end sashimi is tuna sashimi.
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Measures for Fisheries Reconstruction after Rain and Snow freezing disaster in South China
Since the beginning of January 2008, the freezing weather of rain and snow has had a serious impact on fishery production in many provinces and cities in southern China. According to incomplete statistics, the loss of frozen fish and shrimp in southern provinces exceeds 10 billion yuan. In view of this, this paper puts forward some measures and suggestions for the reconstruction of freshwater fisheries after the rain and snow freezing disaster in the south for reference. The types of disasters are distinguished from the types of farming and regions. At present, the main types of disasters are as follows: 1. Tilapia aquaculture: tilapia aquaculture has suffered the most from the cold wave this winter
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