A living indicator Fish in nature also serve other missions besides providing for the dining table. For example, appropriate amounts of fishing can be permitted for those species with stable populations, providing recreation. Wild animals are also the best materials for teaching about one's own land and about the environment. What's more, animals are an important indicator of the quality of the environment of human life.
除了食用，野生動物對人類還負有其他重要使命，比如對族群穩定的魚類，可以適度開放垂釣，具有遊憩功能；野生動物也是最好的鄉土與環境教育教材，更是人類生活環境的指標。