1. Home
  2. Items
  3. Abundance, growth, distribution, and movements of white sturgeon in the...
PDF

Abundance, growth, distribution, and movements of white sturgeon in the Mid-Snake River. Research technical completion report, project B-026-IDA Item Info

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

View on Timeline View on Map Download PDF
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:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu. The University of Idaho Library is not liable for any violations of the law by users.
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

Contact us about this record

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:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu. The University of Idaho Library is not liable for any violations of the law by users.
Standardized Rights:
http://rightsstatements.org/vocab/InC-EDU/1.0/
« Previous Back to Browse Next »