Accession Number : ADA322817

Title :   Relations Between Habitat Variability and Population Dynamics of Bass in the Huron River, Michigan.

Descriptive Note : Technical rept.,

Corporate Author : NATIONAL ECOLOGY RESEARCH CENTER FORT COLLINS CO

Personal Author(s) : Bovee, Ken D. ; Newcomb, Tammy J. ; Coon, Thomas G.

PDF Url : ADA322817

Report Date : APR 1994

Pagination or Media Count : 68

Abstract : One of the assumptions of the Instream Flow Incremental Methodology (IFIM) is that the dynamics of fish populations are directly or indirectly related to habitat availability. Because this assumption has not been successfully tested in coolwater streams, questions arise regarding the validity of the methodology in such streams. The purpose of our study was to determine whether relations existed between habitat availability and population dynamics of smallmouth bass (Micropterus dolomieu) and rock bass (Ambloplites rupestris) in a 16-km reach of the Huron River in southeastern Michigan. Both species exhibited strong to moderate carryover of year classes from age 0 through age 2, indicating that adult populations were related to factors affecting recruitment. Year-class strength and subsequent numbers of yearling bass were related to the availability of young-of-year habitat during the first growing season for a cohort. Numbers of age-0, age-1, and adult smallmouth bass were related to the average length at age 0 for the cohort. Length at age 0 was associated with young-of-year habitat and thermal regime during the first growing season.

Descriptors :   *HABITATS, *FISHES, *STREAMFLOW ANALYSIS, THERMAL PROPERTIES, METHODOLOGY, VALIDATION, DYNAMICS, GROWTH(GENERAL), ROCK, POPULATION, VARIATIONS, AVAILABILITY, FLOW, RIVERS, ADULTS, SEASONS.

Subject Categories : Biology
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE