Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska

Thesis (M.S.) University of Alaska Fairbanks, 1997 Escapement information for management of coho salmon, (Oncorhynchus kisutch), is lacking in some drainages on Kodiak National Wildlife Refuge. In 1993 and 1994,1 assessed availability of spawning substrate for coho salmon in the Ayakulik River, a ma...

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Bibliographic Details
Main Author: Hander, Raymond F.
Format: Thesis
Language:English
Published: 1997
Subjects:
Coho salmon
Ayakulik River
Spawning
Fishery management
Fairbanks
Kodiak
Alaska
Online Access:http://hdl.handle.net/11122/14757
id ftunivalaska:oai:scholarworks.alaska.edu:11122/14757
record_format openpolar
spelling ftunivalaska:oai:scholarworks.alaska.edu:11122/14757 2023-12-24T10:18:18+01:00 Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska Hander, Raymond F. 1997-05 http://hdl.handle.net/11122/14757 en_US eng http://hdl.handle.net/11122/14757 Coho salmon Ayakulik River Spawning Fishery management Thesis ms 1997 ftunivalaska 2023-11-30T19:04:38Z Thesis (M.S.) University of Alaska Fairbanks, 1997 Escapement information for management of coho salmon, (Oncorhynchus kisutch), is lacking in some drainages on Kodiak National Wildlife Refuge. In 1993 and 1994,1 assessed availability of spawning substrate for coho salmon in the Ayakulik River, a major drainage of the Refuge, as a potential cost-effective method for setting escapement goals. Spawning substrate was divided into three categories: optimal, suboptimal and marginally usable. I conducted a foot survey to count coho salmon spawners in 10 river sections during late October 1994 in three of four strata comprising the Ayakulik River. I found a significant relationship between numbers of spawners and availability of optimal substrate in two of the strata combined (r2=0.28, p=0.04); with optimal and suboptimal substrate combined the significance increased (r2=0.39, p=0.01). When I pooled optimal, suboptimal, and marginally usable substrate I found no significant relationship (r2=0.21, p=0.08). Adequate escapement of coho salmon may be predicted by the amount of optimal and suboptimal substrate available. U. S. Fish and Wildlife Service Thesis Kodiak Alaska University of Alaska: ScholarWorks@UA Fairbanks
institution Open Polar
collection University of Alaska: ScholarWorks@UA
op_collection_id ftunivalaska
language English
topic Coho salmon
Ayakulik River
Spawning
Fishery management
spellingShingle Coho salmon
Ayakulik River
Spawning
Fishery management
Hander, Raymond F.
Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska
topic_facet Coho salmon
Ayakulik River
Spawning
Fishery management
description Thesis (M.S.) University of Alaska Fairbanks, 1997 Escapement information for management of coho salmon, (Oncorhynchus kisutch), is lacking in some drainages on Kodiak National Wildlife Refuge. In 1993 and 1994,1 assessed availability of spawning substrate for coho salmon in the Ayakulik River, a major drainage of the Refuge, as a potential cost-effective method for setting escapement goals. Spawning substrate was divided into three categories: optimal, suboptimal and marginally usable. I conducted a foot survey to count coho salmon spawners in 10 river sections during late October 1994 in three of four strata comprising the Ayakulik River. I found a significant relationship between numbers of spawners and availability of optimal substrate in two of the strata combined (r2=0.28, p=0.04); with optimal and suboptimal substrate combined the significance increased (r2=0.39, p=0.01). When I pooled optimal, suboptimal, and marginally usable substrate I found no significant relationship (r2=0.21, p=0.08). Adequate escapement of coho salmon may be predicted by the amount of optimal and suboptimal substrate available. U. S. Fish and Wildlife Service
format Thesis
author Hander, Raymond F.
author_facet Hander, Raymond F.
author_sort Hander, Raymond F.
title Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska
title_short Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska
title_full Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska
title_fullStr Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska
title_full_unstemmed Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska
title_sort spawning substrate and adequate escapement for coho salmon in the ayakulik river, kodiak national wildlife refuge, alaska
publishDate 1997
url http://hdl.handle.net/11122/14757
geographic Fairbanks
geographic_facet Fairbanks
genre Kodiak
Alaska
genre_facet Kodiak
Alaska
op_relation http://hdl.handle.net/11122/14757
_version_ 1786207194349305856

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