MetaData for Migration and Passage of Redband Trout in the Donner und Blitzen River, 2007-2009, Information Reports 2009-05
Migration and Passage of Redband Trout in the Donner und Blitzen River, 2007-2009, Information Reports 2009-05
Identification Information
-
Citation
- Originator: Jacobs, S.
- Publish Date: August 2009
- Online Link: None
- BPA Project #:
-
Contact Information
- Agency: Oregon Department of Fish and Wildlife
- Name: Cedric Cooney
- Job Position: Natural Resources Data and Systems Manager
- Telephone: 503-947-6094
- E-Mail Address: cedric.x.cooney@odfw.oregon.gov
-
Description
- Abstract: Movement of redband trout (Oncorhynchus mykiss gairdneri) was tracked between March 2007
and June 2009 in the Donner und Blitzen River (Blitzen River). We had three primary study
objectives: 1) examine redband trout spawning locations and spawning migration timing, 2)
evaluate redband trout passage at diversion dams, and 3) investigate seasonal migration
patterns of redband trout as they relate to stream temperature dynamics. We tagged 96
redband trout with radio transmitters and 706 with PIT tags. Radio tracking included both
mobile and fixed station detections. We established PIT tag readers at Cato Bridge (Rkm 1),
Busse Dam (Rkm 35), Grain Camp Dam (Rkm 48), and Page Dam (Rkm 76) for additional data
on large-scale movement patterns. With the PIT antennas at the three diversion dams, we
placed one antenna below the dam and one at the upstream exit of the fish ladders to evaluate
the passage delays at each dam. Stream temperature was recorded at 10 locations in the
Blitzen River throughout the study. Scales of 257 migratory trout were interpreted for age and
spawning history. Our results indicated that the majority of Blitzen redband trout migrated
upstream of Page Dam to spawn and that most trout spawned in the mainstem and not the
tributaries. Upstream trout migration occurred from March to July, but the peak migration
occurred during late April and early May. Passage problems were recorded at two of the three
dams evaluated. Trout were delayed longest at Busse Dam and 44% of radio-tagged trout that
approached the dam were never able to pass. Trout experienced less delay at Grain Camp
Dam and only 8% of radio-tagged trout failed to pass the dam. At Page Dam, which has a
recently upgraded fish ladder, trout delays were short and only 5% of trout that approached the
dam were unable to pass. Potentially stressful or lethal temperatures (>24.3°C) were recorded
at all monitoring locations downstream of Fish Creek, except at the site just below Page
Springs. The migratory population ranged in age from 1+ to 5+, but only age 3+ and older trout
were reproductively mature. This suggests that the spring upstream migration includes both
adult trout seeking suitable spawning habitats and immature trout making a seasonal habitat
shift for thermal refuge. A fraction of the PIT-tagged fish were observed to make two or three
migrations from below Busse Dam to above Page Dam in the spring and returning back to the
lower river in the fall. We recommend prioritizing fish passage at the Busse Dam and Grain
Camp Dam for conservation and enhancement efforts.
-
- Purpose:
-
- Time Period of Content: 2007-2009
- Geographic Extent: Donner und Blitzen River
- Status: Final
- Use Constraints:
- Format: PDF File
Data Quality Information
- Lineage-Source:
Data Information
- No data information was supplied.
Entity and Attribute Information
- Attributes Description:
Is a physical copy maintained for reference at Headquarters?
No
Files
File Name |
File Type Category |
File Uploaded |
File Description |
|
2009-05.pdf
|
Document File |
3/23/2018 12:32:57 PM |
|
|
|
|