Lobsters in nature mainly inhabit the sandy and muddy seabed, with one tail lurking in each hole. However, in the mating period, males and females pair up and sometimes lurk in the gaps of rocks, while Japanese lobsters live in groups. Lobsters must be fed during feeding, and it is necessary to consider whether various attached organisms can be used as bait.
1. water temperature: lobsters live in low water temperature. The lowest water temperature in winter is about 5℃-6℃, which is suitable for lobster culture. If the water temperature is low, the maturity will be extended to 5-7 years. Lobster has poor high temperature resistance. In the experiment, the water temperature was raised to 25℃, and there was no special abnormality for 2 weeks. According to the experiment, the suitable growth temperature is 20℃-23℃, and lobster grows fastest in water with water temperature of 20℃-22℃, so in winter when the water temperature drops, it is one of the methods to promote growth by using warm drainage.
2. Salinity: The suitable salinity range of lobster is 26.90‰-34.40‰, and it can live and metamorphose in seawater with low salinity of 23.50‰.
3. Bottom material: The metamorphosed larvae of lobsters turn to benthic life in order to avoid predation by natural enemies, and the sand in the bottom material is extremely important as a place for lurking and feeding. After metamorphosis for 3-4 days, lobsters can burrow and lurk in sand with a particle size of 0.4- 1.00 mm. After 8 days of metamorphosis, it can lurk in sand with a particle size of 2.0-3.0 mm.
4. Growth rate: For the lobster population before 1 age, it is only necessary to lay the bottom of the pond with oyster shells, instead of putting artificial shelter nests, and feed the mussels as bait. Since the 2nd instar, tetrachloroethylene pipes have been put into shelter nests, and the number of them is twice that of lobsters. In the population that has been cultured for two years, individuals with the maximum weight of about 300 grams appear, and the lobsters gain about 50% each time they molt. The lobsters molt at the beginning of the first year, and their weight can reach 450 grams when they are sexually mature. In the third-year population, 16% reaches sexual maturity.
The growth of lobster is related to bait, environment, water quality and molting times. Various baits and electrical stimulation have been tested. As a result, feeding fresh shrimp meat grows faster, which is 1 times faster than feeding fish meat. During the growth process, it usually molts more than twice a year, and it can molt four times when chemical drugs or electrical stimulation are used, and the growth rate increases 1 times. After the lobster molts, it will become active again after two weeks of hardening of the new shell. At this time, the food intake will increase greatly, and the feed amount must be increased by 30%.