Iowa, fishes, fisheries, endangered fish species, habitat alteration
Settlers in Iowa found a rich and diverse fisheries resource in its creeks, rivers, and lakes. However, for nearly a century, degradation of the aquatic environments and their fishes occurred as a result of agricultural and urban development. Since the 1930's management efforts have improved the interior sport fishery resources but many nongame species have been extirpated or are imperiled in the state. Various forms of pollution and habitat alteration remain as threats to the well-being of stream and lake fishes in Iowa. The Mississippi and Missouri rivers bordering Iowa have been drastically changed by navigation improvements and other influences. At least 17 Iowa fishes may be regarded to be in danger of extirpation from these waters, and stocks of many others have been depleted. Fisheries production of the Upper Mississippi River has been relatively stable for the past several decades and is improved in some respects but that of the Missouri River has declined to relative insignificance. Efforts are presently under way to mitigate the damage caused to the fish and wildlife resources of these rivers by the navigation alterations.
Proceedings of the Iowa Academy of Science
© Copyright 1981 by the Iowa Academy of Science, Inc.
Menzel, Bruce W.
"Iowa's Waters and Fishes: A Century and a Half of Change,"
Proceedings of the Iowa Academy of Science: Vol. 88:
, Article 7.
Available at: http://scholarworks.uni.edu/pias/vol88/iss1/7