Jennifer M Bayer (Former Employee)
Science and Products
Filter Total Items: 28
Early life history of the northern pikeminnow in the lower Columbia River basin Early life history of the northern pikeminnow in the lower Columbia River basin
The northern pikeminnow Ptychocheilus oregonensis is a large, native cyprinid in the Columbia River basin that has persisted in spite of substantial habitat alterations. During the months of June to September 1993-1996, we investigated the temporal and spatial patterns of northern pikeminnow spawning, along with describing larval drift and characterizing larval and early juvenile rearing...
Authors
D.M. Gadomski, C.A. Barfoot, J.M. Bayer, T.P. Poe
Length changes in white sturgeon larvae preserved in ethanol or formaldehyde Length changes in white sturgeon larvae preserved in ethanol or formaldehyde
We examined the effects of two preservatives on the notochord and total lengths of white sturgeon (Acipenser transmontanus) larvae. White sturgeon larvae that were one, seven, and 14 days old were measured live and then preserved in 95% ethanol or 10% formaldehyde. Length changes were then determined at 20 and 95 days after preservation. We found mean length changes ranging from 0.4% to...
Authors
J.M. Bayer, T.D. Counihan
Identification of larval Pacific lampreys (Lampetra tridentata), river lampreys (L. ayresi), and western brook lampreys (L. richardsoni) and thermal requirements of early life history stages of lampreys Identification of larval Pacific lampreys (Lampetra tridentata), river lampreys (L. ayresi), and western brook lampreys (L. richardsoni) and thermal requirements of early life history stages of lampreys
Abstract not available
Authors
J.M. Bayer, M.H. Meeuwig, J.G. Seelye
Early life history of northern squawfish Ptychocheilus oregonensis in the Columbia River. System-wide significance of predation on juvenile salmonids in Columbia and Snake River reservoirs and evaluation of predation control measures Early life history of northern squawfish Ptychocheilus oregonensis in the Columbia River. System-wide significance of predation on juvenile salmonids in Columbia and Snake River reservoirs and evaluation of predation control measures
No abstract available
Authors
C.A. Barfoot, D.M. Gadomski, J.M. Bayer, G.T. Schultz
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 28
Early life history of the northern pikeminnow in the lower Columbia River basin Early life history of the northern pikeminnow in the lower Columbia River basin
The northern pikeminnow Ptychocheilus oregonensis is a large, native cyprinid in the Columbia River basin that has persisted in spite of substantial habitat alterations. During the months of June to September 1993-1996, we investigated the temporal and spatial patterns of northern pikeminnow spawning, along with describing larval drift and characterizing larval and early juvenile rearing...
Authors
D.M. Gadomski, C.A. Barfoot, J.M. Bayer, T.P. Poe
Length changes in white sturgeon larvae preserved in ethanol or formaldehyde Length changes in white sturgeon larvae preserved in ethanol or formaldehyde
We examined the effects of two preservatives on the notochord and total lengths of white sturgeon (Acipenser transmontanus) larvae. White sturgeon larvae that were one, seven, and 14 days old were measured live and then preserved in 95% ethanol or 10% formaldehyde. Length changes were then determined at 20 and 95 days after preservation. We found mean length changes ranging from 0.4% to...
Authors
J.M. Bayer, T.D. Counihan
Identification of larval Pacific lampreys (Lampetra tridentata), river lampreys (L. ayresi), and western brook lampreys (L. richardsoni) and thermal requirements of early life history stages of lampreys Identification of larval Pacific lampreys (Lampetra tridentata), river lampreys (L. ayresi), and western brook lampreys (L. richardsoni) and thermal requirements of early life history stages of lampreys
Abstract not available
Authors
J.M. Bayer, M.H. Meeuwig, J.G. Seelye
Early life history of northern squawfish Ptychocheilus oregonensis in the Columbia River. System-wide significance of predation on juvenile salmonids in Columbia and Snake River reservoirs and evaluation of predation control measures Early life history of northern squawfish Ptychocheilus oregonensis in the Columbia River. System-wide significance of predation on juvenile salmonids in Columbia and Snake River reservoirs and evaluation of predation control measures
No abstract available
Authors
C.A. Barfoot, D.M. Gadomski, J.M. Bayer, G.T. Schultz
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government