It should be noted that the theme in the stories show that the fish populations are reducing.
It should be noted that the theme simply means the main idea in a story. It's the underlying message in a story.
In this case, the theme in the stories show that the fish populations are reducing. The article "Big Fish in Troubled Waters" studied how large predators are declining.
"One choice at a time" stated that people can avoid adding t the problem of a declining fish population.
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