scholarly journals Mercury cycling in the Hells Canyon Complex of the Snake River, Idaho and Oregon

Fact Sheet ◽  
2016 ◽  
Author(s):  
Gregory M. Clark ◽  
Jesse Naymik ◽  
David P. Krabbenhoft ◽  
Collin A. Eagles-Smith ◽  
George R. Aiken ◽  
...  
Keyword(s):  
Snake River ◽  
Mercury Cycling ◽  
Hells Canyon

Snake River-Hells Canyon Phosphorus TMDL – Fitting the Pieces Together

2002 ◽  
Vol 2002 (8) ◽  
pp. 570-597
Author(s):  
Bret Linenfelser ◽  
Brown ◽  
Caldwell ◽  
Robbin Finch
Keyword(s):  
Snake River ◽  
Hells Canyon

Biology, Management, and Protection of North American Sturgeon

2002 ◽  
Keyword(s):  
Population Dynamics ◽  
Population Structure ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Snake River ◽  
Nez Perce ◽  
River Section ◽  
Catch And Release ◽  
Research Population ◽  
Hells Canyon

<em>Abstract.</em>—White sturgeon <em>Acipenser transmontanus</em> in the Hells Canyon reach of the Snake River have been under sport catch-and-release regulations for almost thirty years. Three states, Idaho, Oregon, and Washington bound this river section, and each imposed catchand-release regulations in 1970s. Nez Perce Tribe tribal members can harvest sturgeon throughout the year in this Snake River section. The population structure at the initiation of catch-and-release regulations showed a deficit in the 92–183 cm (TL) length range as white sturgeon within this group were harvested before 1972. The population composition was 86% between 55 and 92 cm, 4% between 92 and 183 cm, and 10% greater than 183 cm. Information collected during 1982–85 and in 1998 shows increasing abundance in the mid-sized length-group (92–183 cm TL). Because of the positive response of this population to a reduction in legal sport harvest, there have been discussions regarding the elimination of catchand-release fishing. Because of the longevity of white sturgeon, it may take another 25–30 years for the older age-class segment (>183 cm TL) to show a response to catch and release. For the interim, I suggest that strong consideration be given for retaining the Hells Canyon population as a conservation research population. This designation would allow for better understanding of population dynamics for future managers, but still allow present activities of catch-and-release sport fishing and tribal harvest.

CASE STUDIES IN COLLABORATION: THE LOWER BOISE RIVER TRADING PROJECT AND THE SNAKE RIVER - HELLS CANYON TMDLS

2013 ◽  
Author(s):  
Thomas V. Dupuis ◽  
Robbin W. Finch ◽  
Daniel V. Steenson ◽  
J.D. Ringert Clark Chartered
Keyword(s):  
Case Studies ◽  
Snake River ◽  
Hells Canyon
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