Data-based question: fishing down marine food webs
1. We can check what is in the stomach of the fish to determine what trophic levels it has consumed therefore, determining what trophic level the fish is in.
2a. Over the years, both the fresh water fish and marine fish have decreased trophic levels. However, the marine fish have a more constant decrease where has the fresh water fish have a faster rate of decline.
3. Increasing the age means that the size increases as well, which would mean that the range of prey would increase as well.
4. If the trophic level is lowered, the age is lowered as well. This is because they are related to each other.