Method for improving uniformity of sizes of juvenile crabs
A technology for uniformity and juvenile crabs, which is applied to the cultivation of crab species and to improve the uniformity of juvenile crab specifications. It can solve the problems of low uniformity of specifications and low survival rate, and achieve the effect of simple method, improved survival rate and easy realization
Inactive Publication Date: 2015-05-13
FRESHWATER FISHERIES RES INSITUTE OF JIANGSUPROVINCE
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Problems solved by technology
[0004] The purpose of the present invention is to invent a kind of improved juvenile crab that uses the original pond ecological cultivation to solve the problems that the standard uniformity of V-stage juvenile crabs is not high, the survival rate is low, and a large number of "lazy crabs" are easy to form in the current crab species cultivation process. Method of Specification Uniformity
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Such as figure 1 shown.
[0019] A method for improving the uniformity of juvenile crab size, it comprises the following steps:
[0020] First, according to the water surface area for stocking, the megalopa are stocked according to the conventional stocking density of 1.0-1.5 kg per mu;
[0021] Secondly, in stocking water surface 1, barrier 2 is set, separate a piece of area and account for the small pool that stocking water surface area is no more than 20% with 20 mesh sieve tulle to be used for cultivating from megalopa to V stage juvenile crab, the selected quantity Put the megalopa in the small pond, keep the consistency of the water body in the small pond and the water surface for stocking, and make the water in the small pond and the water surface for stocking circulate. In different stages of seedling growth and development, the cu...
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Provided is a method for improving uniformity of sizes of juvenile crabs. The method is characterized by including the following steps: firstly, proper quantities of megalopae are selected according to the breeding water surface area; secondly, partitions are arranged in a breeding water surface, so that a small pool with an area not larger than 20% of the breeding water surface area is formed in a separated mode, the selected megalopae are placed in the small pool, uniformity of water in the small pool and water of the breeding water surface is kept, water in the small pool is communicated with the water of the breeding water surface and accordingly more than 80% of the megalopae in the small pool grow synchronously; thirdly, normal feeding is carried out until the megalopae grow to be V-stage juvenile crabs, the partitions are removed so that the V-stage juvenile crabs can enter the whole breeding water surface, and the V-stage juvenile crabs are cultivated to grow to be crabs in a common crab cultivation method. The method is simple, the sizes of the crabs are uniform, and the yield is high.
Description
technical field [0001] The invention relates to an aquaculture method, in particular to a method for cultivating crab species, in particular to a method for improving the standard uniformity of juvenile crabs. Background technique [0002] As we all know, the simultaneous growth of juvenile crabs in the breeding process of crabs is the key to increasing the yield and size of crabs, and the process from megalopa to V-stage juveniles is a critical period for crabs. The growth and development of the young are affected by eating and genetics, and the growth speed will be different, the morphological change process will not be synchronized, and the phenomenon of big seedlings eating young seedlings and cannibalism will appear, which will affect the survival rate. [0003] At present, there are two ways to cultivate juvenile crabs. One is to put crab seedlings (megalopa) directly into the crab seed breeding pool to directly cultivate crab seedlings. Due to the large water surface ...
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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 李跃华丁淑燕邓燕飞朱清顺柏如发
Owner FRESHWATER FISHERIES RES INSITUTE OF JIANGSUPROVINCE