How to spend the summer in abalone culture in the south

It is understood that abalone has high requirements for the water temperature of the breeding sea area, and its suitable growth water temperature is about 20℃. In summer, a large number of northern varieties such as black abalone and wrinkled abalone introduced into the south will die due to too high water temperature, while the water temperature in northern waters such as Qingdao is more suitable for abalone growth. In recent years, every summer, many farmers in Fujian will send abalone seedlings and abalone near finished products to Shandong and other places for breeding, and then take back abalone in November of that year.

Abalone transportation adopts two methods of dry transportation and wet transportation. Generally, dry transportation method is adopted for short and short periods, while wet transportation method is adopted for long and long periods. Plastic plates are usually used as abalone attachment base for transportation, and placed in hard containers cleaned and disinfected. The abalone transported shall be selected for temporary cultivation to improve the survival rate of transportation.

Abalone transportation plan and arrangement should be careful. Dry transportation method abalone density should be reasonable, do not squeeze each other, ensure high humidity, low temperature, regular watering, prevent direct sunlight and rain, put in a ventilated cool place, regularly transported to the destination. Wet transport method machine pump to ensure normal operation, to have sufficient seawater, density sparse, do not overlap, water flow, temperature difference is small, and timely involved in the removal of feces debris, if the transport time is too long, to cast a small amount of bait.

After transportation, abalone, to arrive at the destination, must be temporarily cultivated after a period of time, so that its vitality can be pulled out of the sub-culture, the injured abalone can be reduced water temperature. UV sterilization or drug treatment methods.

The feeding of abalone larvae is necessary, and the quality of the feed is directly related to the growth rate of abalone. Generally, abalone of about 3 mm can not eat macroalgae, mainly relying on attached diatoms for food, at this time do not need to feed; grow to 5-6 mm later, began to eat tender algae such as Enteromorpha. As the individual grows, it becomes dominated by macroalgae.

The feeding frequency and quantity of natural sea area and culture depend on the season. In summer, the water temperature is high, the algae is easy to rot, the thallus is rotten and sinks at the bottom, the ammonia nitrogen in the water increases, the dissolved oxygen decreases, which easily causes the deterioration of the culture environment and affects the normal activities of abalone. Therefore, the bait is fed once every 2-3 days, and the amount should be less, so as to be able to eat up. Autumn is the season when abalone grows faster, so it is necessary to feed enough fresh bait every 4-5 days. In winter, the water temperature is low, the abalone intake is small, fresh algae soaked in water for 7-8 days will not rot, so feed once every 8-10 days in winter. Note that each feeding should be carried out after removing bait residues and abalone feces and replacing fresh seawater.

Abalone likes dry young algae. In the absence of fresh algae, dry algae can be used as bait after soaking, and the mixed effect of algae feeding is good. In algae, Undaria pinnatifida, kelp, cauliflower and so on are algae that abalone likes to eat, with good bait effect and fast growth speed. The local resources are relatively rich in laver, the test results show that it is not ideal, and has a great impact on the digestion of abalone.

Abalone culture can also be fed artificial compound bait, should consider when using it contains animal protein, easy to rot in water immersion, so in the grasp of the bait test time shortened accordingly.

The feeding of abalone in factory culture or tunnel culture is basically the same as above, but the difference is that the water temperature and room temperature in factory culture or tunnel culture are relatively constant, so there are differences in feeding time.