Fish are a major source of food. A healthy balanced diet contains 2 (140g) portions of fish a week. But where does all this fish come from?
Roughly 70% – 80% of the seafood eaten in the UK is imported from abroad. But the rest is fished in our local seas. How does fishing work?
A common fishing method is using trawl nets these nets are attached to a boat by long pieces of rope and they drag behind the boat. Sometimes more than one boat is required to pull the net. Unfortunately trawl nets can catch dolphins as well as fish which inevitably ends in the dolphins drowning.
Another net that can be used is the fixed gillnets. These nets are stationary and run along the bottom of the sea. Fish swim into them and get caught, the gap sizes are big enough that the fish can get its head through the net but not its body the gills then get caught preventing the fish from getting out backwards.
Fishing is also done as a sport. Rods, spears, hand nets and many other methods are used to catch fish on a small scale.
Over fishing is a major issue, it happens when more fish are caught than born. Therefore the amount of fish decreases. This affects many ecosystems and animals. Animals like bears and sea birds then starve as well as other sea predators like seals or sharks. This then affects almost all life whether it is marine or not. It is possible than one day fish will become extinct.
Another reason that fish are struggling is that that the oceans are warming more than normal and fishes habitats are changing rapidly. This forces the fish further and further away from the equator meaning that countries near their like Bangladesh, that get 60% of their animal protein from fish are really going to begin to struggle.