Gun, also known as horse shark. Vertebrates, ichthyoidea, a genus of fishes of the genus Scombridae. Also known as blue mackerel. It is long and flat on the side, about 1 m long and weighs more than 4.5 kg. The body is silvery gray with dark stripes or spots. The lateral line is wavy.

The snout is pointed, with a large mouth and oblique crack. The teeth are flat and sharp, with 1 row in the upper and lower jaws. Scales are small or degenerated. There are 2 dorsal fins, and the second dorsal fin and the posterior part of the anal fin each have 7 ~ 9 small fins. The tail handle is thin and powerful. Tail fin fork.

It is a medium-sized marine economic fish in the upper and middle layers, and often groups for long-distance reproductive migration. Fierce sex and quick swimming. Often chasing small fish and shrimp in groups.

Bayuquan District is a jurisdiction of Yingkou City, Liaoning Province, located 58 kilometers south of Yingkou City, which is a new urban area of Yingkou City. Yingkou Port, one of the top ten coastal ports in China, is located in this area, which is the nearest and most convenient sea passage in the hinterland of Northeast China.

Since the establishment of 1984, Bayuquan District has become the fastest-growing economic and social area in Northeast China, and is the gateway of Yingkou City and Liaodong Bay Economic Zone to the outside world. In the ranking of comprehensive strength of national development zones, it ranks 2nd1. In 20 13 years, it ranked 32nd in the comprehensive strength ranking of municipal districts in China.

Extended data:

I. Climate

Yingkou development zone is surrounded by mountains and seas and belongs to continental temperate monsoon climate. It is characterized by four distinct seasons, the same season of rain and heat, mild climate, moderate precipitation, sufficient sunlight and superior climatic conditions.

The annual average temperature is 9.8℃, the highest temperature is 36.9℃, the lowest temperature is -3 1℃, the annual average precipitation is nearly 700 mm, the annual average sunshine reaches 3000 hours, and the frost-free period is 172~ 188 days. The average number of foggy days over the years is 5 days, and there is ice flowing in the ice condition, but it does not affect the entry of 10,000-ton ships.

In spring (March-May), the weather is southerly and windy, and the climate is dry and rainy. In summer (June-August), there are many southerly winds, concentrated precipitation and high temperature; In autumn (September 9~ 10/October), the weather is crisp and pleasant; In winter (11~1February), the weather is cold and dry. The average wind speed is 2 ~ 4m/s. No typhoon influence.

Second, natural resources

1, mineral resources

There are 32 kinds of metallic and nonmetallic mineral deposits in Yingkou Development Zone and its surrounding areas, including metallic minerals such as gold, silver, copper, iron, aluminum and zinc, nonmetallic minerals such as magnesite, boron, talc and silicon. The daily inflow of natural mineral water is more than 500 tons, and geothermal water reserves in Xiong Yue and other places are rich, with a daily mining capacity of 5,000 tons and a temperature of about 80 degrees Celsius.

Two oil pipelines, Liaohe Oilfield and Daqing Oilfield, pass through Yingkou Development Zone to transport oil and natural gas from Daqing Oilfield and Liaohe Oilfield to Dalian and Yingkou Xingang respectively.

2. Marine resources

The existing coastline of the Development Zone is 28.5 kilometers, with a sea area of * * * 13400 hectares. Coastal salt fields produce 800,000 tons of sea salt annually, and are rich in seafood such as Spanish mackerel, prawns and jellyfish.

3. Biological resources

There is a national first-class protected plant ginkgo biloba; The key protected plants are red rosewood, magnolia, lampstand tree, phellodendron amurense, Juglans mandshurica and so on. And a large number of trees and shrubs, such as juniper, cedar, magnolia and French phoenix tree, which are critical trees in the growth period.

In addition, there are plantain, medlar, dragon bone, Sophora flavescens and other Chinese herbal medicines; Pollution-free natural edible plants such as Pteridium aquilinum, Aralia elata, etc.

Wild animal resources mainly include pheasants, rabbits, foxes, Yellow weasel, badgers and hedgehogs. Wild resident birds mainly include sparrows, woodpeckers, larks, falcons, seagulls, grey magpies, sparrows, owls and other dozens of national second-class or provincial key protected animals.

In addition, the geographical location of the development zone is on the migration channel of migratory birds, and there are a large number of wild migratory birds passing through in spring and autumn.

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