The weather is so hot this year, and the hairy crabs are "thin"?Intersection

It's another year of crab fat

recently

"Yangcheng Lake hairy crabs may be absent from Mid -Autumn Festival"

"High temperature, hot and thin Yangcheng Lake hairy crab"

Become a hot topic of the Internet

So

What is the growth of hairy crabs this year?

Will high temperatures affect the normal listing of hairy crabs?

What are the special services for the meteorological department?

The reporter interviewed Shi Dongtou, a senior engineer of the Meteorological Bureau of Gaochun District, Nanjing City, Jiangsu Province.

River crab farming is the most distinctive and influential pillar industry in freshwater fisheries in Jiangsu Province. At present, the total farming area of ​​the province is about 4 million mu, and the annual output value exceeds 30 billion yuan.

Since the summer of this year, there have been high temperatures above 40 ° C in multiple sites in Jiangsu. In a round of high temperature in mid -July this year, the highest temperature in Jiangsu has the highest value of 31 national stations in mid -July 1961.

The picture shows Jiangsu Province's high temperature days since summer (day)

As one of the main producing areas of my country's hairy crabs, Gaochun District, from mid -June to the end of August, the number of high temperature (≥35 ° C) has reached 52 days, which has been the same period since 1961, especially in August. It is the second highest value in the region's meteorological data recorded in the same period.

The picture shows Gaochun crab breeding base

Shi Dongtou said:

""

Before high temperature weather this year, the growth of hairy crabs is generally better, but the recent continued high temperature weather has a great impact on the growth of hairy crabs.

"

Specific impact:

As a result, the aquatic plants in the breeding pond float or die

First of all, continuous high temperature weather will lead to the floating or death of the aquaculture pond, lack of water plants, and the crab without molting inhabitation; in addition, high temperature will exacerbate soluble oxygen consumption, which will easily cause insufficient dissolved oxygen in the water, resulting in crab hypoxic hypoxia Essence

Causes crab feeding reduction

Secondly, continuous high temperature weather (generally refers to more than 7 days or more) will also lead to a decrease in crab feeding. The remaining bait will affect the water quality in the pond due to fermentation and corrosion, and further worsen the living environment of the crab.

Crab molting is affected

Due to the high temperature of this summer, the crab molting was affected. It is understood that from the launch of crab seedlings to the listing of about 7 to 8 months, the crabs will go through five molten shells. Each molten shell will grow up.

Analysis of the winter head:

""

Compared with the same period of previous years, due to the high temperature weather this year, the time of hairy crabs with four or five shells is obviously late, which affects the listing specifications, time and output of hairy crabs to a certain extent. It is expected that this year's Gatsui Lake hairy crabs and Yangcheng Lake hairy crabs are listed in a large area, and in early and mid -October (under normal years, the peak season for crab listings from late September to early October).

"

In recent years, the meteorological department has launched refined crab meteorological services in accordance with local characteristics.

According to Shi Dongtou, the Gaochun District Meteorological Bureau establishes the user data of the "Crab SMS Platform" to compile characteristic aquatic meteorological service materials, install meteorological water temperature automatic stations, etc. When encountering major weather, use SMS, WeChat and electronic display screens, etc. Release meteorological warnings to the heads of agricultural cooperatives and large aquaculture households.

Recently, an agricultural meteorological expert in Gaochun District, Nanjing City, Jiangsu Province investigated to understand the impact of high temperature.

Gaochun District Meteorological Bureau Agricultural Meteorological Experts measured the pH value of micro -ecological preparations in ponds and guided the adjustment of crab growth water environment.

The picture shows the agricultural meteorological expert of the Meteorological Bureau jointly conducting high -temperature aquaculture meteorological services

The picture shows the Agricultural Meteorological Expert of Gaochun District Meteorological Bureau Joint Fedrims and Fisheries Department experts carry out high -temperature aquaculture meteorological services

For fixed -point farmers

Meteorological experts will also carry out "point -to -point" service

In -depth integration into the entire industry chain of the river crab economy

Ps:

Then let's wait patiently for hairy crabs to go public one after another ~~

Produced by China Meteorological News Agency

Author: Wang Wan Chen Xiaoying

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