Practical techniques for Culture of Bamboo shoot Shell Fish
Bamboo shell fish scientific name brown pond fish or sharp pond fish, warm water economic fish, mainly produced in Cambodia, Thailand, Vietnam and other countries, commonly known as bamboo shell fish in Guangdong and South China. The maximum body length is 60cm and weighs 5- 6kg. The tail weight is 0.3kg, reaching the commodity specification. Thailand bamboo shell fish belongs to the suborder gobies, carnivorous, benthos, burrowing fish, photophobia, often hidden in stone crevices, caves, body color will change with the surrounding water quality and environment, under natural conditions, the main food is small fish, shrimp, culture temperature range in 15--33℃, suitable for water temperature 25--30℃, suitable for pH value between 7.0 - 8.5, suitable for pond, reservoir, mountain pond cage and greenhouse culture. Bamboo shoot shell fish tender meat, less thorns, delicious taste, better than seawater green grouper. The price will not be lower than 100 - 120 yuan/kg, and the breeding cost is relatively low. 1. Selection of fry specifications. The scales on the body surface of bamboo shoot fish are special. They are comb-toothed. Reverse friction can easily hurt the skin and induce infection. The seed size is too large, the scale development is relatively mature, and it is easy to scratch each other during transportation and cause infection, even death. Therefore, the key to the success of breeding bamboo shell fish lies in the selection of small-sized fry, generally no more than 2 cm. After the seedlings are transported back, they shall be temporarily cultivated in pots and barrels for 2 days immediately. The specific methods are as follows: (1) 20mg/L potassium permanganate is soaked and washed for 1h;(2) 10% povidone iodine is added into 20mg/L and 0.6% salt solution is used for soaking and temporarily culturing for 40- 48;(3) if the temperature is high, 20mg/L potassium permanganate is used for sprinkling disinfection on the whole pond at the same time, and seedlings are released after 2 days; and (4) seedlings are released between 2000 and 3000 per mu. In addition, fish nests must be set up. Cut into 60cm or so with 12cm diameter non-toxic PVC pipe, fix it into "well" shape, and place it at the bottom of the pond. 30- 40 "wells" per mu. 2. The characteristics of feeding the fish with bait are that the growth speed is slow in the early stage, and it takes 60- 70 days to grow from 2 cm to 10cm. Live bait must be fed during this time. Better live bait such as wild miscellaneous fish larvae flower, freshwater shrimp fry (shrimp fry can also be desalinated). Because the growth rate of small fish and shrimp is faster than that of shoot shell fry, feeding fish and shrimp fry of appropriate specifications in batches is extremely beneficial to the success of breeding. Our approach is: (1) Local
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Problems in the black larval stage of Japanese eel and its countermeasures
At the turn of spring and summer, Japanese eel culture is mostly in the black larval stage, which generally reflects the decline of feeding rate, prone to rotten Gill, rotten tail syndrome and other phenomena, which seriously affect the healthy, sustained and steady development of Japanese eel culture. This paper analyzes the main problems existing in the culture stage of Japanese eel black larvae, and puts forward some countermeasures for reference. First, the feeding rate decreased: the feeding rate decreased or the feeding amount was difficult to increase in the culture of Japanese eel black larvae, and the main inducing factors
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Experiment on culture of sampan fish in cement pond
1 Materials and methods 1.1 sources of experimental fish on May 12, 2001, sampan fish were shipped from Indonesia and transferred through Malaysia, and arrived at the test site at 5 pm on the 14th. 3000 test fry were transported with oxygen in 6 bags and 3 boxes in live water bags. Upon arrival, only 1380 fry survived and the survival rate was only 46%. The fry put in the fry pond died one after another in the second and third days, and only more than 500 survived because the transportation time was too long. Death caused by carbon dioxide poisoning. 1.
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