A fisheries authority records the catch of sardines and sets a maximum catch for the following year.
| Fish species | Catch in one year (tonnes) | Maximum catch in the following year (tonnes) |
|---|---|---|
| Sardines | 840 | 700 |
Calculate the reduction in the sardine catch if the maximum catch is reached.
Explain how setting this maximum catch could help conserve the sardine stock.
87 exam-style questions on AQA GCSE Biology 7.5 Food production, covering 7.5.1 Factors affecting food security, 7.5.2 Farming techniques, 7.5.3 Sustainable fisheries, and 7.5.4 Role of biotechnology. Each one has a worked solution and a mark scheme showing where the marks go.