First, what conditions are needed to raise lobsters
Lobsters belong to insect-shell animals. They like dark environment and are afraid of strong light. They stay in dark environment to avoid strong light during the day.
when raising lobsters, the management of water quality is very important. The water quality is related to the healthy growth and development of lobsters. When raising lobsters, the ph value of the water quality should be between 7.5 and 8.5, and the transparency should be about 3cm. Before releasing lobsters, 1-2kg of organic fertilizer can be applied per mu to cultivate plankton as natural bait.
second, what technology is needed to raise crayfish
1. Scientific and reasonable fishing
Fishing lobsters must be decided according to the stocking season, and generally you can choose to fish in June-July and November-December every year. You can also catch large lobsters that meet the market specifications first, and then continue to put in new lobsters, so that you can catch lobsters all the year round.
2. Make breeding plans in advance
If wild lobster species are introduced, they must be domesticated for a period of time before being released. Generally, the first year of crayfish breeding is mainly to do a good job in breeding. Generally, shrimp seedlings are raised in summer, and lobsters that grow in the early stage are mainly stocked in autumn and winter and spring.
3. How to raise crayfish
1. Pond requirements for crayfish culture
The pond should be built in a place with sunny ventilation, convenient irrigation and drainage, and no pollution of water quality. The bottom of the pond should be flat, and it is appropriate to use hard soil or sand, with a certain slope (1: 2.5) and a pond depth of 1-1.5m..
2. Preparation for stocking crayfish
About 25 days before raising shrimp seedlings, drain the pond water and clean up the sludge, and then disinfect the pond with 75kg of quicklime per mu.
after disinfection, 55kg of decomposed farmyard manure was applied to each mu of land to cultivate water quality, cladocera and copepod plankton and provide food for shrimp seedlings.
3. Key points of crayfish stocking
The stocking time in summer is in the middle and late July, and 3,-4, juvenile shrimps (the specification is above .8cm) are stocked per mu.
The autumn stocking time is from mid-August to September, and 25,-3, shrimps (about 1.2cm in size) or 15,-2, shrimps (2.5-3 cm in size) are stocked per mu.
The stocking time in winter and spring is December or March-April of the following year, and 15,-2, shrimp fry (1-2 shrimps /kg) are stocked per mu.
4. Feeding method of crayfish
From July to October, the feeding amount of animal feed accounts for about 8-12% of the weight of shrimp, and the dry feed or compound feed accounts for about 3-5% of the weight of shrimp. Feed twice a day, once in the morning and once in the evening, and the feeding amount at night accounts for 6-7%.
In other seasons, the daily feeding amount accounts for about 2-5% of the shrimp's weight, and it is fed once a day, around sunset.
5. Daily management of crayfish
The dissolved oxygen in the pond water should be kept above 5mg/l, the ph should be controlled between 7 and 8.5, and the transparency should be controlled around 4cm.
under normal circumstances, change the water every 15-2 days or so. if it is a hot season, change the water every 5-7 days, and the amount of water changed each time is about one third. Every 2 days, use 1kg of quicklime per mu of pond, and sprinkle it with water all over the pond.