Squirrel takes the first place among the fur-bearing animals caught in our country. What changes in biotic factors can lead to an increase in the protein population?
1) The harvest of plants and fungi that proteins feed on; 2) Reducing the number of predators – martens, and birds of prey – natural enemies of squirrels; 3) Reducing the number of parasites and pathogens; 4) Reducing the number of competing species.
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