Artificial breeding method for cultellus attenuatus
A small razor razor, artificial technology, applied in fish farming, application, climate change adaptation and other directions, can solve the problem of small razor razor no artificial seedling method, can only rely on natural capture and other problems, to achieve strong operability, scientific and simple process Effect
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Embodiment 1
[0022] Firstly, annual sampling of razor clam is carried out. Take 30 razor clams of similar size and specifications, wash the sediment remaining on the shell, separate the soft part from the shell, put it in an oven at 60°C for 48 hours, and weigh the soft part with an electronic balance. Dry weight and shell dry weight, plumpness=(soft body dry weight / shell dry weight)×100%, to determine the specific spawning season of razor clams, the results are as follows figure 1 with 2 shown, from figure 1 It can be seen from the figure that from November to April of the following year, the fatness did not change significantly, and in May and June, the fatness rose rapidly; in early July, some individuals began to lay eggs, and in late July, most The individual has already laid eggs, and the fatness drops sharply, which is similar to that in April; in early August, the fatness begins to rise again, and the gonads quickly return to the mature stage, and enter the next spawning period. ...
Embodiment 2
[0032] The artificial seedling raising method of this razor clam mainly includes the following steps: (1) Cultivate parent shellfish: choose to buy gonads full and mature from late July to early September. The length of the shell is 6.92cm, the width of the shell is 2.22cm, and there is no parasite The razor clams are used as broodstock for artificial nursery broodstocking to ensure that they have never laid eggs to reduce costs;
[0033] (2) Artificial induction of labor: wash the brood shellfish selected in step (1) through filtered sea water, dry in the shade for 12 hours, put the brood shellfish into a net cage (150cm×80cm×20cm) to lay eggs, each net Put about 500 broilers in the box, that is, control the density of broilers in the cage to 2000 / m 3 ;
[0034] (3) artificial hatching: the parent shellfish in the step (2) starts to lay eggs at about 7h, the density of fertilized eggs is controlled to be 40 / ml, and hatching is carried out. The water temperature of the hatchi...
Embodiment 3
[0039] The artificial seedling raising method of this razor clam mainly includes the following steps: (1) Cultivate parent shellfish: choose to buy gonads full and mature from late July to early September, the shell length is 7.00cm, the shell width is 2.20cm, and there is no parasite The razor clams are used as broodstock for artificial nursery broodstocking to ensure that they have never laid eggs to reduce costs;
[0040] (2) Artificial induction of labor: wash the brood shellfish selected in step (1) through filtered seawater, dry in the shade for 11 hours, put the brood shellfish into a net cage (150cm×80cm×20cm) to lay eggs, each net Put about 450 broilers in the box, that is, control the density of broilers in the cage to 1800 / m 3 ;
[0041] (3) Artificial hatching: the parent shellfish in the step (2) starts to lay eggs at about 6.5h, and the density of fertilized eggs is controlled to be 35 / ml for hatching. The water temperature of the hatching is controlled to be 26...
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