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Causes of and Preventive Measures Against Winter Mortality of Fingerlings
According to available data, the average mortality rate of fingerlings caused by improper overwintering reaches 15% each year, with mortality in North China reaching as high as about 20%, and sometimes even exceeding 30%. The reduction in the number of fingerlings leads to insufficient stocking numbers the following year, directly
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Experience in Stocking Fingerlings for Tilapia Pond Aquaculture
1. Selection of fingerling size for stocking. Adult fish farming generally involves stocking in the same year and harvesting in the same year, so the fingerling stocking size is generally 3-10 cm, which gives a high fingerling survival rate, large marketable fish size, and high economic returns. At present, the fingerling sizes for tilapia farming in China mainly fall into three
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Aquaculture Measures to Improve the Survival Rate of Two-Year-Old Grass Carp Fingerlings
I. Main Reasons for the Low Survival Rate of Two-Year-Old Grass Carp Fingerlings 1. Pond not cleared or not thoroughly cleared before stocking Thoroughly inadequate pond clearing easily leads to poor pond bottom quality, with large amounts of pathogenic bacteria remaining on the pond bottom. When the weather is erratic as it has been this year and water quality is unstable, this will cause sporadic deaths of the fingerlings.
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Methods to Improve the Survival Rate of Grass Carp Fingerlings in Grass Carp Farming
Whether grass carp are raised in monoculture or in polyculture with grass carp as the main species, the water quality must be kept fresh. Feed mainly with green feed and supplement with concentrated feed. Concentrated feed includes bran, beans, and compound feed, etc. During the initial stage of stocking (within 15 days), summer fry should be fed some fresh and tender aquatic plants, such as duckweed and watermeal.
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Key Technical Points for Nursing Summer-Fingerlings of Freshwater Pompano
Freshwater pompano fry reared for about 20 days, with a body length of about 3 cm, are called summer-fingerling fish. The key nursing techniques at this stage are as follows: 1. Pond selection. The pond should have abundant water sources, good water quality free of pollution, good light, and convenient water intake and drainage, with a length-to-width ratio of 3:
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Overwintering management techniques for freshwater pomfret fry and fingerlings after being stocked into ponds
1. Overwintering pond preparation: area 600-1500 sq m, pond depth 1.5 m; the pond water in the Pukou District area of Nanjing is geothermal spring water, flowing into the pond in a slight current; the inlet pipe is 10 cm, and the mud at the pond bottom is 10 cm thick. After drying the pond and disinfecting it, fill with water. Each pond is equipped with two 3-kilowatt aerators. 2. Pomfret fry and fingerlings
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Experience in Rearing Yellow Catfish Fingerlings in Ponds
Based on the characteristics at this stage, such as the increased size of yellow catfish fry, feeding habits basically similar to those of adult fish, stronger schooling behavior, increased food intake, and stronger adaptability to the ecological environment, and given that water temperatures are generally high during the rearing process, it is necessary to take into account the characteristics of yellow catfish and grasp
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Methods and Technical Points for Rearing Black Carp Fry and Fingerlings in Ponds
The black carp is a fish with a bluish-black color, mainly distributed in the plains south of the Yangtze River in China, and relatively scarce north of the Yangtze River; it is an important fishery resource in the middle and lower reaches of the Yangtze River and the lakes along the river, and a major culture species in various lakes and ponds. It is one of the "Four Major Chinese Carps" of freshwater aquaculture in China.
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Analysis of Causes of Overwintering Death in Fingerlings and Overwintering Management Measures
Causes of Overwintering Death in Fingerlings and Management Measures
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Detailed Explanation of High-Yield Breeding Techniques for Grass Carp Fingerlings
In recent years, in order to increase breeding profits, the vast number of fish farmers have changed the previous stocking model, from the previous dominance of silver carp to the current dominance of bottom-dwelling fish. ...
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