A mixed bait feeding method for cultivating imitation prawn seedlings

Abstract

A feeding method for parapenaeopsis hardwickii seed cultivation mixed bait is characterized by comprising feeding with mixed bait during the seed cultivation period. For nauplii at the one-day age at a fifth to sixth stage, pandorina and chlorella algae water is inoculated to a seed cultivation pond; for zoea at the two-to-four-day age at a first state, the bait is yolk and BP powder; for mysis at the five-to-six-day age at a first stage, the bait is yolk and mixed compound fodder; for mysis at the seven-to-ten-day age at a second to third stage, the mixed compound fodder is fed every day and rotifer is fed as supplement; for the mysis at the eleven-to-thirteen-day age at a transformation stage, the mixed compound fodder is fed every day and brine shrimp lavas are fed as supplement; for young shrimps at the one-to-five-day age, the mixed compound fodder is fed and the brine shrimp lavas are fed as supplement; for the young shrimps at the six-to-ten-day age, the brine shrimp lavas are fed as supplement; for the young shrimps at the eleven-to-fifteen-day age, the brine shrimp lavas and fresh opossum shrimps are fed as supplement; for the young shrimps at the 15-to-16-day age at the out of pond stage, the feeding amount of the fresh opossum shrimps is reduced, feeding of frozen large brine shrimps is increased, and prawn artificial pellet fodder is fed in a leading mode.

Description

technical field [0001] The invention relates to the Breeding Technology of Hashield's Imitation Penaeid Shrimp, in particular to a mixed bait feeding method for Hashield's imitation prawn seed. Background technique [0002] Hardwood imitation prawns ( Parapenaeopsis hardwickii ), commonly known as striped shrimp, slippery shrimp, and choking shrimp, belongs to the decapod order, the prawn family, and the genus Penaeus. The seabed within 70 meters from the shore. Hardwood's imitation prawns are fresh and tender, and can be eaten fresh or made into sea rice, which is very popular among people. At the same time, the imitation prawn is the main species of coastal towed shrimp and one of the main economic shrimps in the offshore. The imitation prawn has fast growth, long breeding period, large population and high economic value. It is a potential mariculture and multiplication species. [0003] At present, there are two series of bait for the artificial breeding of Penaeus p...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two series of bait for the artificial breeding of Penaeus prawns. One is the whole biological bait: single-celled algae, fertilized eggs of shellfish-rotifers-artemia larvae. Although these fresh baits are convenient to feed, follow-up The management is simple, but it also has the following disadvantages: it is difficult to match the peak period of cultivating fresh and live bait with the time of cultivating palatable bait for seedlings, and it is also affected by environmental weather conditions, especially seawater rotifers. In August, this is the season when the temperature is relatively high, and the water temperature in the outer pond is about 30 degrees. It is very difficult to cultivate rotifers on a large scale in the pond, and the peak duration of rotifers is very short. It often happens that when there is a large demand for seedling production, The peak of rotifers has not arrived, so it cannot be supplied in large quantities; and when the production of seedlings is not needed, there are a large number of rotifers in the bait cultivation pond. In addition, the cultivation of fresh and live baits requires certain conditions and technologies, such as: fertilized eggs of shellfish. It has created restrictive factors for the large-scale seedling production of Imitation prawns; the other is the whole process of compound feed: such as: egg yolk, shrimp chips, artificial Artemia, sieved with different meshes, and fed to larvae at different stages

Although artificial compound feed can be purchased in the market, the supply is sufficient, but the compound feed tends to sink to the bottom, the amount of feeding is difficult to control, and the number of feedings per day is also high, the operation is cumbersome, the technical requirements are high, and it is easy to be caused by bait deposition. Too much will cause water quality to deteriorate. The most important point is that the whole process of compound feed is single in nutrition, which may easily cause the lack of certain nutrients in the seedlings.

The above two bait series have their own shortcomings, and none of them involve bait for large-sized seedlings (about 10-16 days old in the late stage of larvae). Large-sized imitation Penaeus prawns are very aggressive. Without palatable bait, shrimp seedlings will bite each other, and the probability of mutual killing will increase, which will reduce the survival rate of seedling production