Almost half of the world’s oceans have been seriously affected by over-fishing, pollution and climate change, according to a major study of man’s impact on marine life.

Several countries agreed, for instance, to cut Atlantic swordfish catches in 1991. Spain and America did so, but not others: Japan’s catch rose by 70%, Portugal’s by 120% and Canada’s by 200%.

Once again, we tried to sidestep this inconvenience, asking if we could get fishing permits for the day, intending to slip off of the wall and disappear on our own.

For several months Tyne has had a run of disappointing catches, and his boss was quite dissatisfied with him. So he decides to make one more trip before the end of the fishing season.

Over-fishing also leads to fewer jobs, rises in the price of fish and can reduce an important source of revenue for developing countries.