Carrying capacity of habitats used seasonally by coho salmon in the Kametolook River, Alaska Peninsula National Wildlife Refuge

Metadata Updated: October 10, 2019

Coho salmon Oncorhynchus kisutch are an important subsistence resource for residents of the Native Village of Perryville. Recent returns to local streams (Kametolook, Three Star, and Long Beach rivers) have declined and cannot support subsistence needs of the village. This project was implemented to assess the quantity and quality of freshwater habitats used for spawning and rearing by coho salmon in streams near Perryville, and to use these data to conduct a limiting habitat analysis. The habitat inventory was repeated on Clear Creek, a small drainage that supports viable runs of coho salmon. Work was completed in 2002 and 2003 and includes: 1) a habitat inventory on Kametolook and Long Beach river tributaries, Three Star River, and Clear Creek, 2) sampling juvenile coho salmon in Clear Creek, 3) spawning escapement monitoring in Clear Creek (weir) and streams near Perryville (walking surveys), and 4) application of a habitat limiting factor model to all systems. Over 43 km of stream were inventoried in the Kametolook, 42 km in the Long Beach, 27 km in the Three Star, and 12 km in the Clear Creek drainages. Habitat composition and quality were similar between systems, except for a 7-ha drainage lake in the Clear Creek system. Juvenile coho salmon densities in Clear Creek in 2002 were similar to values reported in the literature for streams fully seeded. Juvenile densities were lower in 2003 and not at carrying capacity. Minimum estimates of coho salmon spawning escapement in Clear Creek were about 1,100 in 2002 and 1,000 in 2003. Estimates are minimum values due to weir failures. Age and sex compositions of adult coho salmon were similar between years. Two hundred ninety adult coho salmon were observed in Perryville streams during walking surveys in 2002, and 800 were observed in 2003. Results from the habitat limiting factor analysis indicate that winter habitat availability limits production in all systems and each system has the production potential of over 2,000 adult coho salmon given adequate marine survival. Results of the model are comparable to other reported population parameters for coho salmon throughout their range. Model predictions indicate that the physical habitat of the Kametolook, Three Star, and Long Beach drainages can support coho salmon populations in excess of current spawning escapement levels.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date May 1, 2019
Metadata Updated Date October 10, 2019

Metadata Source

Harvested from DOI CKAN Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Created Date May 1, 2019
Metadata Updated Date October 10, 2019
Publisher Fish and Wildlife Service
Unique Identifier FWS_ServCat_84938
Brent Frakes
Maintainer Email
Public Access Level public
Bureau Code 010:18
Metadata Context
Metadata Catalog ID C:\Program Files (x86)\FWS\DataStore\Application\OpenData\FWS_ServCat_v1_1.json
Schema Version
Catalog Describedby
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Harvest Object Id 0c7231c2-4c15-4ae1-94b3-e8b432c590e7
Harvest Source Id 34ce571b-cb98-4e0b-979f-30f9ecc452c5
Harvest Source Title DOI CKAN Harvest Source
Data First Published 2004-06-01
Homepage URL
Data Last Modified 2004-06-01
Program Code 010:094, 010:028
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Source Hash f9efc05aa1be15826dad3e8bc08f5857227f9722
Source Schema Version 1.1
Spatial -163.388336,54.80768,-156.0202,57.9292564
Category "Unpublished Report"

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