Sampling device and sampling method for pond-culture flatfish
A sampling device, the technology of flounder flounder, applied in fishing, application, animal husbandry, etc., can solve the problems of time-consuming and labor-intensive sampling of rotary nets and hand-drawn nets, easy damage to fish bodies, large deviations, etc., to increase the number of people entering the sampling device The probability of avoiding escape and the effect of large bottom length
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Embodiment 1
[0056] From May to November 2013, during the implementation of the project "National Flounder Industry Technology System-Pond Breeding Project" in the Rizhao City Water Conservancy Farm of Shandong Province, we used the sampling device of the present invention and the rotating net to make a random sampling comparison of flounder test.
[0057] 1. Test conditions and basic situation
[0058] Breeding methods and ponds are engineered pond full-circulation water systems, and the water used for aquaculture is natural seawater. During the high temperature period in summer, the temperature of the aquaculture water is adjusted with low-temperature seawater from underground deep wells, and the daily water exchange rate is 50% to 80%. The water quality parameters during the entire breeding process are: water temperature 14-29°C, dissolved oxygen 5.1-8.5 mg / L, salinity 26-30, pH 7.8-8.2. On May 15, the whole system was used with a single area of 4.5 mu A total of 6 small conjoined po...
Embodiment 2
[0072] From the beginning of May to the beginning of December in 2012, we used the sampling device of the present invention to conduct a sampling test during the implementation of the project "Pond polyculture technology demonstration of sea cucumber and flounder" in Wudi County, Shandong Province Youcheng Ocean Technology Development Co., Ltd.
[0073] 1. Test conditions and basic situation
[0074] There are 3 polyculture ponds for sea cucumber and flounder, with an area of 48 mu (Pond No. 9), 44 mu (Pond No. 10) and 47 mu (Pond No. 11), with a water depth of 1.00-1.20m. There are sea cucumber reefs in the ponds. An average of 500 sea cucumbers / 500g per mu and 10 kg of sea cucumbers are stocked, and the average body length of flounder fry is 155 mm (140-168 mm), with a total of 20,000 fish, including 4,800 fish in No. 9 pond, 6,600 fish in No. 10 pond, and 6,600 fish in No. 11 pond. Pond 8 600 tails. Sea cucumbers are not fed with bait, and the humus in the pond, excremen...
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