PDF
Effects of reduced stream discharge on fish and aquatic macroinvertebrate populations. Research technical completion report, project B-045-IDA Item Info
![We examined the response of aquatic insects and juvenile rainbow-steelhead trout to flow related changes in habitat and assessed the predictive reliability of three hydraulic simulation models currently used in making instream flow recommendations. We conducted spring, summer and fall tests in two large, near natural artificial stream channels with run-riffle channel configurations. One channel was maintained at constant discharge while flow in the second channel was incrementally reduced. All flow reduction tests resulted in increased behavioral drift and catastrophic drift of aquatic insects, with peak drifting at night. [...] All flow reduction tests resulted in decreased numbers and biomass of juvenile rainbow-steelhead trout. We found that large test fish were affected more by reduced flow than small fish. [...] Submitted to the Office of Water Research and Technology, U.S. Department of the Interior.](https://objects.lib.uidaho.edu/iwdl/small/iwdl-198114_sm.jpg)
- Title:
- Effects of reduced stream discharge on fish and aquatic macroinvertebrate populations. Research technical completion report, project B-045-IDA
- Authors:
- White, Robert G.; Milligan, James, H.; Bingham, Allen E.; Ruediger, Robert A.; Vogel, Tomas S.; Bennett, David H.
- Date Created (ISO Standard):
- 1981-09
- Description:
- We examined the response of aquatic insects and juvenile rainbow-steelhead trout to flow related changes in habitat and assessed the predictive reliability of three hydraulic simulation models currently used in making instream flow recommendations. We conducted spring, summer and fall tests in two large, near natural artificial stream channels with run-riffle channel configurations. One channel was maintained at constant discharge while flow in the second channel was incrementally reduced. All flow reduction tests resulted in increased behavioral drift and catastrophic drift of aquatic insects, with peak drifting at night. [...] All flow reduction tests resulted in decreased numbers and biomass of juvenile rainbow-steelhead trout. We found that large test fish were affected more by reduced flow than small fish. [...] Submitted to the Office of Water Research and Technology, U.S. Department of the Interior.
- Subjects:
- Fish Trout Macroinvertebrates Hydraulic models Simulation Streamflow Flow
- Collection:
- IWRRI
- IWRRI number:
- 198114
- Rights:
- Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
- Publisher:
- Idaho Water Resources Research Institute; University of Idaho
- Contributing Institution:
- University of Idaho
- Type:
- Text
- Format:
- application/pdf
- Cataloger:
- KIT
- Date Digitized:
- 2017-08-21
Source
- Preferred Citation:
- "Effects of reduced stream discharge on fish and aquatic macroinvertebrate populations. Research technical completion report, project B-045-IDA", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-198114.html
Rights
- Rights:
- Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/