Open AccessBull Trout Life History, Genetics, Habitat Needs, and Limiting Factors in Central and Northeast Oregon. Annual Report 1996.
Author(s) -
Blane L. Bellerud,
Stephanie L. Gunckel,
Alan R. Hemmingsen,
David V. Buchanan,
Philip J. Howell
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/654049
Subject(s) - trout , juvenile , habitat , fishery , ecology , biology , sympatry , geography , fish <actinopterygii>
This study is part of a multi-year research project studying aspects of bull trout life history, ecology and genetics. This report covers the activities of the project in 1996. Results and analysis are presented in the following five areas: (1) analysis of the genetic structure of Oregon bull trout populations; (2) distribution and habitat use of bull trout and brook trout in streams containing both species; (3) bull trout spawning surveys; (4) summary and analysis of historical juvenile bull trout downstream migrant trap catches in the Grande Ronde basin; and (5) food habits and feeding behavior of bull trout alone and in sympatry with brook trout