Effects of spawning run delay on spawning migration of Arctic grayling
Thesis (M.S.) University of Alaska Fairbanks, 1989 The effects of delays on the spawning run of Arctic grayling in Fish Creek, a tributary of the Jack River, near Cantwell, Alaska were examined. Tagged grayling were delayed for 3, 6, or 12 days, and then released; control fish were released within 1...
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1989
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ftunivalaska:oai:scholarworks.alaska.edu:11122/14754 2023-12-24T10:12:43+01:00 Effects of spawning run delay on spawning migration of Arctic grayling Fleming, Douglas F. 1989-09 http://hdl.handle.net/11122/14754 en_US eng http://hdl.handle.net/11122/14754 Arctic grayling Thesis ms 1989 ftunivalaska 2023-11-30T19:04:38Z Thesis (M.S.) University of Alaska Fairbanks, 1989 The effects of delays on the spawning run of Arctic grayling in Fish Creek, a tributary of the Jack River, near Cantwell, Alaska were examined. Tagged grayling were delayed for 3, 6, or 12 days, and then released; control fish were released within 12 hours of capture. During the delays, a high proportion of females became ripe; most males were ripe before the delays and remained ripe over a longer period than females. Delayed and control fish were monitored by the recapture of tagged fish in upstream traps. Females released in a "running-ripe" condition migrated at higher rates, but failed to reach upstream areas in similar proportions as those of "less ripe" females. Reduction in distances traveled by grayling as a result of longer delays may lead to the use of non-preferred spawning habitats, underuse of spawning areas upstream, and decreases in recruitment. I recommend that spawning delays for Arctic grayling not exceed 3 days. Alaska Department of Transportation and Public Facilities, and Federal Highways Administration Thesis Arctic grayling Arctic Alaska University of Alaska: ScholarWorks@UA Arctic Fairbanks |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
topic |
Arctic grayling |
spellingShingle |
Arctic grayling Fleming, Douglas F. Effects of spawning run delay on spawning migration of Arctic grayling |
topic_facet |
Arctic grayling |
description |
Thesis (M.S.) University of Alaska Fairbanks, 1989 The effects of delays on the spawning run of Arctic grayling in Fish Creek, a tributary of the Jack River, near Cantwell, Alaska were examined. Tagged grayling were delayed for 3, 6, or 12 days, and then released; control fish were released within 12 hours of capture. During the delays, a high proportion of females became ripe; most males were ripe before the delays and remained ripe over a longer period than females. Delayed and control fish were monitored by the recapture of tagged fish in upstream traps. Females released in a "running-ripe" condition migrated at higher rates, but failed to reach upstream areas in similar proportions as those of "less ripe" females. Reduction in distances traveled by grayling as a result of longer delays may lead to the use of non-preferred spawning habitats, underuse of spawning areas upstream, and decreases in recruitment. I recommend that spawning delays for Arctic grayling not exceed 3 days. Alaska Department of Transportation and Public Facilities, and Federal Highways Administration |
format |
Thesis |
author |
Fleming, Douglas F. |
author_facet |
Fleming, Douglas F. |
author_sort |
Fleming, Douglas F. |
title |
Effects of spawning run delay on spawning migration of Arctic grayling |
title_short |
Effects of spawning run delay on spawning migration of Arctic grayling |
title_full |
Effects of spawning run delay on spawning migration of Arctic grayling |
title_fullStr |
Effects of spawning run delay on spawning migration of Arctic grayling |
title_full_unstemmed |
Effects of spawning run delay on spawning migration of Arctic grayling |
title_sort |
effects of spawning run delay on spawning migration of arctic grayling |
publishDate |
1989 |
url |
http://hdl.handle.net/11122/14754 |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic grayling Arctic Alaska |
genre_facet |
Arctic grayling Arctic Alaska |
op_relation |
http://hdl.handle.net/11122/14754 |
_version_ |
1786176059726626816 |