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Scientific Investigations Map 3272

Prepared in cooperation with the Idaho Department of Fish And Game

Bathymetry, Morphology, and Lakebed Geologic Characteristics of Potential Kokanee Salmon Spawning Habitat in Lake Pend Oreille, Bayview and Lakeview Quadrangles, Idaho

By Gary J. Barton and Andrew M. Dux

Thumbnail of and link to report PDF (8.3 MB)Abstract

Kokanee salmon (Oncorhynchus nerka) are a keystone species in Lake Pend Oreille in northern Idaho, historically supporting a high-yield recreational fishery and serving as the primary prey for the threatened native bull trout (Salvelinus confluentus) and the Gerrard-strain rainbow trout (Oncorhynchus mykiss). After 1965, the kokanee population rapidly declined and has remained at a low level of abundance. Lake Pend Oreille is one of the deepest lakes in the United States, the largest lake in Idaho, and home to the U.S. Navy Acoustic Research Detachment Base. The U.S. Geological Survey and Idaho Department of Fish and Game are mapping the bathymetry, morphology, and the lakebed geologic units and embeddedness of potential kokanee salmon spawning habitat in Lake Pend Oreille. Relations between lake morphology, lakebed geologic units, and substrate embeddedness are characterized for the shore zone, rise zone, and open water in bays and the main stem of the lake. This detailed knowledge of physical habitat along the shoreline of Lake Pend Oreille is necessary to better evaluate and develop kokanee recovery actions.

First posted September 27, 2013

For additional information contact:
Director, Idaho Water Science Center
U.S. Geological Survey
230 Collins Road
Boise, Idaho 83702
http://id.water.usgs.gov/

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Suggested citation:

Barton, G.J., and Dux, A.M., 2013, Bathymetry, morphology, and lakebed geologic characteristics of potential Kokanee salmon spawning habitat in Lake Pend Oreille, Bayview and Lakeview quadrangles, Idaho: U.S. Geological Survey Scientific Investigations Map 3272, 1 sheet, https://pubs.usgs.gov/sim/3272.



Contents

Abstract

Introduction

Setting

Methods

Lakebed Geologic Characteristics

Acknowledgments

References Cited


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