Accession Number : ADA322665

Title :   Habitat Suitability Index Models: Nonmigratory Freshwater Life Stages of Atlantic Salmon.

Descriptive Note : Biological science rept. no. 3,

Corporate Author : NATIONAL BIOLOGICAL SERVICE ANN ARBOR MI GREAT LAKES SCIENCE CENTER

Personal Author(s) : Stanley, Jon G. ; Trial, Joan G.

PDF Url : ADA322665

Report Date : MAY 1995

Pagination or Media Count : 28

Abstract : A Habitat Suitability Index model was developed by evaluating individual suitability indices of 17 environmental variables that have been shown to affect productivity or survival of nonmigratory freshwater life history stages of Atlantic salmon (Salmo salar L.). These stages included egg, embryo, fry, and parr but not smolt. During summer base flows, the most suitable habitats had temperatures of 16-19 deg C, oxygen percent saturation exceeding 60%, and pH between 5.5 and 6.8. The most suitable current velocity was 1030 cm/s for fry and 10-40 cm/s for parr. The most suitable depth was 10-40 cm for fry and 20-50 cm for parr. The Habitat Suitability Index model is useful for evaluating stream habitat for production and survival of juvenile Atlantic salmon when these variables cannot practically be measured directly.

Descriptors :   *MODELS, *FRESH WATER, *HABITATS, *FISHES, TEMPERATURE, SURVIVABILITY, SATURATION, OXYGEN, WATER QUALITY, EMBRYOS, PH FACTOR, SUMMER, STREAMS, ECOLOGY, BASE FLOW, INDEXES(RATIOS).

Subject Categories : Biology
      Ecology
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE