Pegg, M.A.

8 items:

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
Spatial, temporal, and environmental trends of fish assemblages within six reaches of the Upper Mississippi River System We investigated differences in adult and young-of-the-year (YOY) fishes within each of the six Long Term Resource Monitoring Program study areas, using monitoring data from 1993 to 2001. Our objective was to investigate the relative roles of seasonal, annual, in situ, and physical habitat factors in explaining assemblage structure patterns within the Long Term Resource Monitoring Program study areas. Adult and YOY assemblage structure within each reach was dominated by one to three numerically abundant species. The percent of the total abundance for which these species accounted was 10–88% and varied among age classes and study areas. Physical habitat classes were only weakly associated with differences in fish... Categories: Publication; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service
White perch occurrence, spread, and hybridization in the middle Illinois River, Upper Mississippi River System Categories: Publication; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service
Development of a life history database for Upper Mississippi River fishes Categories: Publication; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service
Spatial patterns of fish communities in the Upper Mississippi River System: Assessing fragmentation by low-head dams Categories: Publication; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service

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