The reason for the formation of the world s four major fishing grounds

1. Hokkaido Fishing Ground is located at the confluence of the Japanese warm current and the cold current of the Kuril Islands, due to the difference in the density of the seawater, the dense cold water sinks, and the warm water with less density rises, so that the sea water is vertically agitated, bringing the organic matter deposited on the seabed to the sea surface, providing abundant bait for fish, so that the sea area has become a world-famous fishing ground.

The confluence of cold and warm currents can disturb the seawater, and the upper seawater will bring nutrients to the surface of the ocean, so that plankton can flourish, and then provide abundant bait for fish, and fishery resources are abundant. In addition, the confluence of cold and warm currents can create a "water barrier" to prevent fish from swimming, and because of the advanced technology of the fishing industry and the development of the country's aquaculture fishery, it has become the world's largest fishing ground.

2. Newfoundland Fishery, the current from the Arctic Ocean along the Labrador Peninsula is called the Labrador Current, which meets the Gulf Current near 40 ° latitude in the southeast of Newfoundland, causing this sea area to be often foggy and warm water fish and cold-water fish to converge to form a world-famous Newfoundland fishery.

3. The North Sea fishery is located at the confluence of the North Atlantic warm current and the cold current from the Arctic. The cold and warm currents converge to produce upwelling currents. The seawater in the upwelling current area continues to flow from the lower layer to the surface, and nutrients such as decomposed organic matter in the lower layer of the seawater are also brought to the surface.

As a result, the water quality of this area is fertile, forming a highly productive fishing area in the North Sea.

4. The coast of Peru is in the southeast trade wind belt, the southeast trade wind blows from the South American continent to the Pacific Ocean, so that the surface sea water along the coast goes offshore, and the bottom sea water rises to supplement and form an upward compensation flow, which brings the nutrients to the surface layer of the seabed, and the surface sea water flows northward under the action of the wind, and the sea water flowing away from the original sea area is supplemented by the deep sea water, and the deep sea water turns up, bringing rich nutrients on the bottom of the sea, and the plankton multiplies in large quantities, providing sufficient bait for fish and shrimp to form a large fishing ground.

1. Peruvian fisheries are formed because of upwelling.

2. The North Sea fishery is formed by the confluence of the North Atlantic Warm Current and the East Greenland Cold.

3. The Hokkaido fishing grounds are formed by the confluence of the warm Japanese current and the cold current of the Kuril Islands.

4. Newfoundland fisheries are formed by the confluence of the warm Gulf Current and the cold Labrador Current.

That is, only the Peruvian fishery is formed by the upwelling, and the other three are formed by the convergence of cold and warm currents!

from ocean currents. In terms of the impact on fisheries, there are four major fisheries in the world.

1. The Hokkaido fishing ground is made up of warm currents from Japan.

Formed by the confluence with the cold current of the Kuril Islands.

2. The Newfoundland Fishery is formed by the confluence of the warm Gulf Current and the cold current of Labrador.

3. The North Sea fishery is formed by the confluence of the North Atlantic Warm Current and the East Greenland Cold Current.

4. Peru. The fishery is formed by the upwelling compensating currents along the Peruvian coast.

In general, marine fishery resources are mainly concentrated on the coastal continental shelf.

The sea area, that is, the part of the continental seabed that extends from the coast to a depth of about 200 meters. Here sunlight is concentrated, and biophotosynthesis is carried out.

Strong, rivers that flow into the sea bring abundant nutrients, hence plankton.

Prosperous. They are bait for fish and are generally abundant in temperate seas.

In the temperate zone, the surface sea water and the bottom sea water are exchanged in winter, and the upper sea water is rich in nutrients, which is conducive to the reproduction of plankton.

In addition, the confluence of cold and warm currents and the flooding of cold seawater are also abundant.

From these aspects, there are five major fishing grounds in the world:

1. North Pacific Fishing Ground: It is a vast area including Hokkaido Fishing Ground, Zhoushan Fishing Ground in China, and many fishing grounds on the west coast of North America;

2. Southeast Pacific Fisheries: It is a vast area including Peruvian fisheries;

3. Northwest Atlantic Fishing Grounds: It is a vast area including Newfoundland Fishing Grounds;

4. Northeast Atlantic Fishing Grounds: It is a vast area including North Sea Fisheries;

5. Southeast Atlantic Fishing Grounds: It is a vast area including coastal fisheries in southwest Africa.

The four major fishing grounds in the world are Hokkaido Fisheries in Japan, North Sea Fisheries in the United Kingdom, Newfoundland Fisheries in Canada, and Peruvian Fisheries in Peru.

The Hokkaido Fishery is formed by the cold current of the Kuril Islands and the warm current of Japan, the North Sea fishery is formed by the convergence of the warm current of the North Atlantic Ocean and the cold water of the southward movement of the Arctic Ocean, the Newfoundland fishery is formed by the confluence of the warm current of the Gulf of Mexico and the cold current of Labrador, and the Peruvian fishery is formed by the upwelling of the cold current of Peru.

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The world's four major fishing grounds: Japan's Hokkaido fishery is formed by the Kuril Stream and the Japanese warm current, the British North Sea fishery is formed by the confluence of the North Atlantic Current and the southward cold water of the Arctic Ocean, Canada's Newfoundland fishery is formed by the confluence of the Gulf of Mexico Stream and the Labrador Current, and Peru's Peruvian fishery is formed by the upwelling of the Peruvian cold current.

1. Hokkaido Fishing Ground: It is formed by the confluence of the Japanese warm current and the cold current of the Kuril Islands.

2. The Newfoundland Fishery is formed by the confluence of the warm Gulf Current and the cold current of Labrador. It used to be one of the four largest fishing grounds in the world, but after centuries of unbridled fishing, especially after large mechanized trawlers began to operate in the fishing grounds in the fifties and sixties of the twentieth century, the Newfoundland fishing grounds gradually disappeared and were no longer visible after the nineties.

Today, Newfoundland fishing grounds are a thing of the past.

3. North Sea Fishing Ground: It is formed by the confluence of the warm current of the North Atlantic Ocean and the cold water of the Arctic Ocean to the south.

4. Peruvian Fishing Grounds: It is formed by the upwelling compensating current of the Peruvian cold current, which causes the deep sea water to gush up.

North Sea fisheries, cod, herring, capelin.

Hokkaido fisheries, Japan: salmon, pollock, Pacific herring, Far Eastern sardines, saury.

Canada's Newfoundland Fishery: Cod.

Peruvian Fishery: Peruvian anchovy.

Hokkaido Fishing Grounds: Japan's Warm Bucket Dust Stream and the Kuril Cold CurrentQihui Newfoundland Fishing Ground: The Gulf Stream meets the Labrador Current.

The North Sea Fishery is formed by the confluence of the North Atlantic Current and the East Greenland Current: an upwelling current off the coast of Peru, the Peruvian Cold Current, which is the upwelling of deep seawater.