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December 3, 2010 | History

Inventory and survey of the brown and rainbow trout populations of the Big Hole River of southwest Montana, 2001-2005 1 edition

Inventory and survey of the brown and rainbow trout populations of the ...
Oswald, Richard A.

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Inventory and survey of the brown and rainbow trout populations of the Big Hole River of southwest Montana, 2001-2005
by Richard A Oswald.

Published 2005 by Montana Dept. of Fish, Wildlife and Parks in Bozeman, Mont .
Written in English.

About the Book

River discharge and thermal data are summarized for the Big Hole River at the USGS Melrose Gage site for water years 2002-2004. A relatively severe episode of drought continued to dominant flow and temperature regimes over the report period. Despite extremely low water yields recorded over the period, summer minimum flows were slightly mitigated through components of a Big Hole River Drought Plan administered by the Big Hole River Watershed Committee. Rainbow trout population studies were conducted by fall population estimates in the Jerry Creek and Melrose Study Sections while brown trout population studies were conducted from spring estimates in the Maiden Rock, Melrose and Hog Back Study Sections. Rainbow trout populations demonstrated declining trends in recruitment and population density but maintained near average standing crops through relatively high densities if older, larger fish in the populations. A relatively severe point source for whirling disease was identified near the head of the Melrose section. Data strongly suggest that the whirling disease infection has been reducing the rainbow trout recruitment through the reach. Brown trout populations in the Maiden Rock, Melrose and Hog back Section exhibited declining trends in density, standing crop, recruitment, numbers of older larger fish, and spring condition factor concomitant with extremely low summer flow regimes and high summer water temperatures throughout the period. Record high winter ambient temperatures in January and February of 2005 were associated with extremely high brown trout condition factor. Numbers of Age V and older brown trout in the Maiden Rock Section declined to their lowest observed density since the inception of special angling regulations in 1981.

Edition Notes

Cover title.

"June 2005"

p. 19 - "All work included in this report in conjunction with Federal Aid in Fish and Wildlife Restoration acts: Project Numbers: F-113-R-2, R-3, R-4 and R-5. Montana Fish Wildlife and Parks Project Number 3320."

Includes bibliographical references (p. 16-19).

Classifications

Dewey Decimal Class
597.5/709786
Library of Congress
QL628.M9 O89 2005

The Physical Object

Pagination
1 v. (various pagings) :

ID Numbers

Open Library
OL16367762M
Internet Archive
inventorysurveyo2005oswa
LC Control Number
2007406526

History Created December 10, 2009 · 2 revisions Download catalog record: RDF / JSON

December 3, 2010 Edited by Open Library Bot Added subjects from MARC records.
December 10, 2009 Created by WorkBot add works page