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Fishing the North Sea
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The North Sea
Fishing in the North Sea is concentrated in the southern coastal waters. The main fishing method is trawling.
Annual catches grew each year until the 1980s, when a high point of over 3 million metric tons (3.3millionS / T) was reached. Since then, the numbers have fallen to about 2.3 million tonnes (2.5millionS / T) per year with notable differences between years. Besides the fish caught, it is estimated that 150,000 metrictons (165,000 S / T) of unmarketable catch are caught and metrictons 85,000 (94,000 S / T) of dead and injured invertebrates.
Of the fish caught, about half are used for the production of fish oil and fishmeal.
History
Sturgeon, shad, striped and salmon, among other species were common in the North Sea the 20th century, when numbers declined due to overfishing.
Other factors such as the introduction of alien species, industrial and agricultural pollution, trawling and dredging, eutrophication of human origin, construction on the coast of breeding and feeding grounds, sand and gravel extraction, offshore construction and heavy maritime traffic have also contributed to the decline.
The bottom and the mouth of a sturgeon
The OSPAR Commission manages the OSPAR Convention to counter the harmful effects of human activity on wildlife in the North Sea, preserving endangered species, and provide environmental protection. All North Sea border states are signatories to the MARPOL 73/78 Agreement preserving the marine environment by preventing the Pollution from Ships. Germany, Denmark and the Netherlands also have a trilateral agreement for the protection of the Wadden Sea, or marshes, which run along the costs of the three countries in the southern North Sea.
A late 19th century, large quantities of herring were in Scotland. Today mainly mackerel, Atlantic cod, whiting, saithe, plaice and sole are caught. In addition, the common shrimp, lobster and crab, along with a variety of seafood is harvested.
Overfishing
Trends in landings of cod, haddock, whiting and Norway pout in the North Sea (1961-2004).
In recent decades, overfishing has left many unproductive fisheries, disrupting the dynamics of the marine food chain and manufacturing jobs fishing. Herring, cod and plaice fishing could soon face the same situation as fishing for mackerel, which ceased in the 1970s due to overfishing. From the 1960s, various regulations have attempted to protect fish stocks such as limited fishing times and limits the number of fishing boats, among other regulations. However, these rules were not applied consistently and did not bring much relief. Since then, the United Kingdom and Denmark, two important fishing nations, became members of the EU, and tried, with the help of the Common Fisheries Policy, to introduce the problem under control.
Norway is not an EU member, also has reached an agreement with the European Community policy on fisheries. Regional advisory committees meet with the EU to help enforce the policy.
In addition to threats from disruptions in the food chain, non-target species often fall victim to intense fishing. Sea turtles, dolphins, porpoises, rays, and dozens of species of fish are killed or injured by trawlers and beams. From Denmark trawling alone accounts for the death of dolphins 5000 year. Trawling may also have a destructive impact on seabed habitats as the trawl beams can drag along the ground to root plants and destroy reefs.
Fish caught in the North Sea in metric tons
Country
1950
1960
1970
1980
1990
1996
2002
Denmark
96 494
284 527
528 127
1806191
1328251
1284365
1249656
Norway
296 337
323 381
480 819
498 777
617 741
618 669
691 062
United Kingdom
308 895
343 002
410 775
389 417
343 205
355 385
295 367
Germany
233 481
305 776
284 685
90 217
108 990
63 647
69 836
Netherlands
64 438
92 119
121 524
213 365
256 597
140 765
146 835
Soviet Union / Russia
89 269
352 857
429 182
7181
1
0
0
France
79 751
149 769
202 948
100 861
64 860
35 262
55 379
Sweden
43 680
71 899
124 790
86 465
116 695
72 863
131 991
Faroe Islands
38 630
17 111
63 725
71 540
23 292
27 572
0
Iceland
0
50 065
21 111
523
0
8
4668
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