A kind of method of using hard-bottomed pond to carry out the seedling breeding of the naked gridworm
A bare square starworm and pond technology, applied in animal husbandry, etc., can solve the problems of affecting the survival rate of seedlings, heavy workload of workers, cumbersome indoor benthic seedling cultivation operations, etc., and achieve the protection and development of marine resources , Improve the survival rate, and the effect of high practical value
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Embodiment 1
[0028] A kind of method utilizing hard-bottomed pond to carry out naked gridworm seed breeding, comprises the following steps:
[0029] S1: Selection of Hard Bottom Ponds
[0030] Choose a hard-bottomed pond with a cement surface for centralized sewage discharge. The area of the pond is 3.8 mu. The slope of the bottom of the hard-bottomed pond is 5% ± 3%. The hard-bottomed pond is located in a zone free of oil pollution and far away from domestic sewage. All poisonous insects are prohibited; the hard bottom pond is equipped with a water gate that can naturally absorb water during the spring tide. The water gate is nailed with 120-mesh nylon net. The water gate is equipped with two water inlets with a diameter of 250mm. The water inlet is equipped with a 2000-kilowatt submersible pump. The water outlet of the submersible pump is covered with a 5m-long 120-mesh nylon bag, and the nylon bag is located in the hard-bottomed pond;
[0031] S2: Pre-treatment of hard-bottomed ponds...
Embodiment 2
[0044] A kind of method utilizing hard-bottomed pond to carry out naked gridworm seed breeding, comprises the following steps:
[0045] S1: Choose a hard bottom pond
[0046] Choose a hard-bottomed pond with a cement surface for centralized sewage discharge. The area of the pond is 3.8 mu. The slope of the bottom of the hard-bottomed pond is 5% ± 3%. The hard-bottomed pond is located in a zone free of oil pollution and far away from domestic sewage. All poisonous insects are prohibited; the hard bottom pond is equipped with a water gate that can naturally absorb water during the spring tide. The water gate is nailed with 120-mesh nylon net. The water gate is equipped with two water inlets with a diameter of 250mm. The water inlet is equipped with a 2000-kilowatt submersible pump. The water outlet of the submersible pump is covered with a 5m-long 120-mesh nylon bag, and the nylon bag is located in the hard-bottomed pond;
[0047] S2: Pre-treatment of hard-bottomed ponds
[...
Embodiment 3
[0060] The steps of the present embodiment 3 are the same as those of the embodiment 2, except that the bottom sand in the step S3 includes the following mass fraction components: 35% fine sand, 45% medium sand, and 20% coarse sand. Put the planktonic larvae cultured for 6 days in step S4 into the hard bottom pond, and the temperature for cultivating the planktonic larvae is 28°C-33°C.
[0061] Cultivate until the number of juvenile starworms reaches 1600 / kg, dig the seedlings and harvest the seeds; this embodiment harvests after 75 days of breeding, counts the number of seedlings by sampling, manually digs the seedlings, and samples 7 100cm×100cm seedlings. Square sample block, seven sampling blocks respectively sample 1015, 1046, 925, 1087, 1034, 1007, 956, average 1024.43 / m 2 , it is estimated that the output of this hard-bottomed pond is about 2.5599 million, and the sample body weight is 0.38-0.68g. According to the statistics, 48.7% of the cells have a body weight of ≥0....
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