TRAVERSE CITY, Mich. (AP) — Sport fish have declined significantly in portions of the Upper Mississippi River infested with Asian carp, adding evidence to fears about the invader’s threat to native species, according to a new study.

Analysis of nearly 20 years of population data suggests the carp are out-competing fish prized by anglers, such as yellow perch, bluegill, and black and white crappie, the report said.

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