First, the purchase of shrimp tips; shrimp farmer to shrimp farms to buy shrimp, the field will be used to use small hand-shouldered dip nets repeatedly picked up from the bottom of the nursery pool dense shrimp, Sheng was presented in a white gourd Shrimp farmers, let them choose. At this time, the shrimp farmer saw the shrimps with uniform jumps and even specifications, and then the two sides hammered the deal. However, when the shrimp seedlings were sampled and counted, it was found that the size and size of the shrimps were inconsistent. For example, the body length was 0.8-1.0 cm, and the body length of the young was only 0.5-0.6 cm, and the percentage of the young was about 20%-40. Percentages ranging, shrimp farmers have to swallow themselves. In fact, it is not difficult to solve this “mysteryâ€. When the shrimp farmer observes the shrimp seedling sample given on the farm, he may wish to use another white gourd scoop to remove some shrimp seedlings from the sample (about 100-200 tails). Dilute with water, and then take a small white bowl and take a look out of the shrimp (about 5 to 10 tails for each). This observation → sampling → dilution → re-sampling → re-observation, repeated three or four times, its internal “mysteries†will know a little, only to do so shrimp farmers can buy satisfactory shrimp. Second, the use of shrimp tips; traditional shrimp release operation method is to first put the shrimp bag in the pond, and then slowly turn the shrimp bag, so that it gradually becomes similar to the pond water temperature, later opened the shrimp bag Put a little water into the mouth and put the shrimp into the pool with water. This method of operation is time-consuming and laborious, and several people have to go to the pond to operate. If the wind is a bit larger, the shrimp bags will be blown to every corner of the pond. The author recommended a new shrimp seedling operation method to shrimp farmers. When the shrimp and shrimp are transported to the shrimp farm, 30-40 cm of pool water is injected into a sterile black glass steel drum (capacity of approximately 1.0-1.5 m3) placed on a feeding bait (foam board). Put the shrimp into the pond water) and place 1-2 aerated stones to inflate and aerate oxygen, and then prepare the shrimps that will be put into the pond and come with the shrimps. Pour into the bucket until about 30 minutes after the shrimps adapt to the pool water. Grab a boat slowly by one person (that is, pull the ropes that have been fixed on the two sides of the pond). Feed the boat and follow the pool from the upwind of the pond. Use a small scoop to collect the shrimp from the bucket and gently put it into the pond. It is worth reminding that all the aerators in the pool should be turned off (after 2-3 hours before starting) 20 minutes before the shrimp seedlings are put in, so that the water waves and the formed water flow caused by their work can be avoided under the influence of wind power. , The shrimp seedlings swimming in the downwind (near the pool) were splashed on the edge of the pool and died. The merits of the seedling operation method are as follows: shrimp seedlings can quickly adapt to the large water bodies in the pond, save time and labor costs, and have a high survival rate in the early stage of the rearing of the young larvae, which is suitable for use in the high level pool.
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