The causes and preventive measures of the death of a large number of mackerel

Mackerel is a mollusk in shellfish, which is rich in meat nutrition and high nutritional value. It has a very long history of breeding in China, the market is extremely popular, and the breeding prospect is good. In the production of oysters, there will be a large number of deaths, which occur faster, and it takes only a few days to find a small number of deaths, which takes farmers by surprise. So what is the cause of the death of a large number of leeches? How to prevent it? Let's take a look at the details.

1. The culture environment is poor.

Mackerel likes to live in the inner bay where the wind is calm, the tidal current is smooth and the sediment is soft. It grows very fast in this environment. If the breeding site is poor, the sediment is sticky, and the air permeability is poor, the pollution of sea water or sediment will cause it to die in large quantities.

Prevention method: choose a good breeding site is the basis of breeding, in order to prevent the aging of the site, to regularly rake loose substrate, can also be manual use of machinery, and then the fluctuation of sea water to wash naturally.

2. High culture density

The main reason for the death of a large number of oysters is that the breeding density is too high, which can easily lead to the lack of bait, which will lead to the lack of adequate nutrition, resulting in weak physique and slow growth, and in the later stage of reproduction, it is very easy to float and cause death.

Prevention method: reasonable stocking density, because the culture environment in each region is different, so there is not a strict standard for culture density. But generally speaking, the areas with better culture conditions can be properly stocked, and those with small size can also appropriately increase the culture density, while those with poor culture conditions should appropriately reduce the culture density.

3. Climate is changeable

High temperature and rainy, low pressure, strong wind (typhoon and so on) these climatic factors, cause a large number of death reasons are: 4-5 consecutive rainy days, precipitation more than 3000 mm; 3-4 consecutive days temperature higher than 30 degrees; 3-4 consecutive days of air pressure less than 1001 mbar; when the tide blows a gale, it will directly hit the beach and pile up and die.

Prevention methods: for these climatic factors can not be controlled by manpower, only to strengthen management, to avoid losses, in long-term rainy days, to do a good job of drainage measures; in high temperature, will be systematically transferred to the low tide level, and so on.

4. Disease

Disease is also one of the reasons for the death of a large number of oysters, especially in the period of high temperature, razor clam is very easy to infect the disease, once the infectious disease occurs, the diseased Sinonovacula Sinonovacula decays very quickly at high temperature, so that the bottom material is polluted, and then infects the whole breeding site in a short time, resulting in a large number of deaths.

Prevention methods: we must pay attention to the prevention and control of diseases, disinfect and sterilize the site, restrain the growth of bacteria, treat the disease in time after finding the disease, strengthen the management, fish out the dead fish in time, and then comprehensively disinfect the site to improve the substrate.

The above are the causes and preventive measures of a large number of deaths. I hope I can help you. If you want to know more about planting, please follow us.