PDF
Abundance, growth, distribution, and movements of white sturgeon in the Mid-Snake River. Research technical completion report, project B-026-IDA Item Info
- Title:
- Abundance, growth, distribution, and movements of white sturgeon in the Mid-Snake River. Research technical completion report, project B-026-IDA
- Authors:
- Coon, John C.; Bjornn, T. C.; Ringe, Rudy R.
- Date Created (ISO Standard):
- 1977-09
- Description:
- During the years 1972-75, we captured 876 sturgeon from the Snake River between Lower Granite and Hells Canyon dams. We marked or tagged the sturgeon so that we could assess their abundance, growth, distribution and movements. We recaptured 204 of the sturgeon, some up to eight times. Some of the large pools in the Snake River contained more than 200 sturgeon, according to our estimates. By expanding the population estimates we made for several pools in the river, we believe 8,000-12,000 sturgeon resided in the study area during the period 1973-1975. Small sturgeon (less than 3 feet) were the most abundant (86%) of the fish caught. Sturgeon 3-6 feet in length were least abundant (4%) and large fish (over 6 feet in length) comprised 10% of the fish we caught. There was some tendency for the small 2 to 3 foot sturgeon to move downstream, whereas the larger sturgeon did not move far from the original site of capture. Growth of sturgeon produced since dams were constructed in Hells Canyon was less than for sturgeon produced prior to damming of the river. Sturgeon are reproducing successfully in the middle section of the Snake River but the population may not thrive as in past years if the growth rate has indeed slowed and if critical habitat for the rearing of 3-6 foot sturgeon has been eliminated by dams in the lower Snake River
- Subjects:
- sturgeon population growth dam effects
- Location:
- Lower Granite Dam
- Latitude:
- 46.63
- Longitude:
- -117.38
- Collection:
- IWRRI
- IWRRI number:
- 197708
- Rights:
- Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
- Publisher:
- University of Idaho
- Contributing Institution:
- University of Idaho
- Type:
- Text
- Format:
- application/pdf
- Cataloger:
- wbv
- Date Digitized:
- 2012
Source
- Preferred Citation:
- "Abundance, growth, distribution, and movements of white sturgeon in the Mid-Snake River. Research technical completion report, project B-026-IDA", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-197708.html
Rights
- Rights:
- Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/