Irons, K.S.

18 items:

The long-term resource monitoring program: insights into the Asian carp invasion of the Illinois River, Illinois, USA Categories: Publication; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service
Winter habitats used by largemouth bass in the Illinois River, a large river floodplain ecosystem During the winter of 1993 1994, we characterized habitats used by 17 radio-tagged largemouth bass Micropterus salmoides in La Grange Reach of the Illinois River, a large river-floodplain ecosystem that has been significantly altered from its natural state. Radio-tagged largemouth bass wintered in backwaters, off-channel coves, ditches, and marinas from November through February. Electrofishing mean catch rates were higher in the study areas during winter than in other seasons, indicating fish were more concentrated in these areas during winter. Five of nine study areas received thermal inputs from springs or power plants, but water temperatures in all nine areas were warmer than the main channel during winter. Current... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service
1995 Annual Status Report: A summary of fish data in six reaches of the Upper Mississippi River System The Long Term Resource Monitoring Program (LTRMP) completed 2,723 collections of fishes from stratified random and permanently fixed sampling locations in six study reaches of the Upper Mississippi River System during 1995. Collection methods included day and night electrofishing, hoop netting, fyke netting (two net sizes), gill netting, seining, and trawling in select aquatic area classes. The six LTRMP study reaches are Pools 4 (excluding Lake Pepin), 8, 13, and 26 of the Upper Mississippi River, an unimpounded reach of the Mississippi River near Cape Girardeau, Missouri, and the La Grange Pool of the Illinois River. A total of 59–72 fish species were detected in each study reach. For each of the six LTRMP study... Categories: Publication; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service
Analysis of fish age structure and growth in the Illinois River Otoliths and other calcified structures have been used to age and determine growth rates of fish from a variety of habitats. Sagittal otoliths were removed from fishes representing five species from La Grange Pool of the Illinois River for age determination. Species collected included largemouth bass (Micropterus salmoides), black crappie (Pomoxis nigromaculatus), bluegill (Lepomis macrochirus), white bass (Morone chrysops), and freshwater drum (Aplodinotus grunniens). Common univariate techniques were used to analyze the significance of spatial and temporal variation in growth and back-calculated mean length-at-age for all five species. For largemouth bass, black crappie, and bluegill, age-frequency distributions... Categories: Publication; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service
2004 Annual Status Report: A summary of fish data in six reaches of the Upper Mississippi River System Categories: Publication; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service

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