Record Details
Bioenergetic evaluation of diel vertical migration by bull trout
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Bioenergetic evaluation of diel vertical migration by bull trout |
| Names |
Eckmann, Madeleine
(creator) Dunham, Jason B. (advisor) |
| Date Issued | 2014-11-21 (iso8601) |
| Note | Graduation date: 2015 |
| Abstract | I evaluated hypotheses related to growth as a driver of depth use and diel vertical migration by bull trout (Salvelinus confluentus) in a thermally stratified reservoir. I applied a bioenergetic model to evaluate growth of bull trout in relation to potential patterns of diel depth use by bull trout in Ross Lake, Washington. Modeled patterns of growth were derived from observed vertical distributions of temperature and prey availability. I also observed bull trout depth (and corresponding temperature) use patterns to determine if observed behaviors corresponded with those predicted to maximize growth. Results of this work suggest that bull trout migrations beyond 25 m deep in Ross Lake cannot be explained exclusively by growth and survival alone, two common explanations for diel vertical migration. These deeper excursions may be explained by a third driver that has not been previously emphasized: the importance of colder water for gametogenesis. Further evaluation of this hypothesis as a means of explaining diel vertical migration for bull trout and other fish species in similar environments is warranted. |
| Genre | Thesis/Dissertation |
| Access Condition | http://creativecommons.org/licenses/by-nd/3.0/us/ |
| Topic | bull trout |
| Identifier | http://hdl.handle.net/1957/54623 |
