Accession Number:

ADA470414

Title:

Analysis of Fish Age Structure and Growth in the Illinois River

Descriptive Note:

Technical rept.

Corporate Author:

ILLINOIS STATE WATER SURVEY PEORIA CENTER FOR WATERSHED SCIENCE

Report Date:

2007-06-01

Pagination or Media Count:

65.0

Abstract:

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 salmoldes, 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.

Subject Categories:

  • Anatomy and Physiology
  • Ecology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE