Determining Lamprey Species Composition, Larval Distribution, and Adult Abundance in the Deschutes River, Oregon, Subbasin; 2004-2005 Annual Report.

Graham, Jennifer C.; Brun, Christopher V.

doi:10.2172/877183

Cited by 5 publications

(5 citation statements)

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“…However, a more informative interpretation of conversion estimates will require a better understanding of the distribution and size of Pacific lamprey spawning populations in the Columbia basin. Pacific lamprey historically coincided spatially with anadromous salmonids in the basin (Close et al 1995), but there has been little systematic study of current populations (see Cochnauer and Claire 2002;Moser and Close 2003;Graham and Brun 2005). The PIT tag data from 2005-2007 suggests that relatively large proportions of the runs may enter tributaries between John Day and McNary dams (i.e., the John Day and Umatilla rivers).…”

Section: Comparison Of Results By Tag Typementioning

confidence: 99%

Adult Pacific Lamprey Migration in the Lower Columbia River: 2007 Radiotelemetry and Half-duplex Pit Tag Studies

Keefer¹,

Boogs²,

Peery³

et al. 2009

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Section: Comparison Of Results By Tag Typementioning

confidence: 99%

Adult Pacific Lamprey Migration in the Lower Columbia River: 2007 Radiotelemetry and Half-duplex Pit Tag Studies

Keefer¹,

Boogs²,

Peery³

et al. 2009

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“…Improved understanding using genetic tools, spawning ground sampling, demographic modeling, or other methods may prove beneficial. Pacific lamprey historically coincided spatially with anadromous salmonids in the basin (Close et al 1995), but there has been little systematic study of current populations (see Cochnauer and Claire 2002;Moser and Close 2003;Graham and Brun 2005). The PIT tag data from 2005-2011 suggest that relatively large percentages of the runs may enter tributaries between John Day and McNary dams (especially the John Day River).…”

Section: Discussionmentioning

confidence: 99%

Adult Pacific Lamprey Migration in the Lower Columbia River: 2011 Half-Duplex Pit Tag Studies

Keefer¹,

Caudill²,

Johnson³

et al. 2012

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“…An optimistic interpretation is that many lampreys that did not pass through a reach entered spawning tributaries. Radiotelemetry studies using about 950 lampreys tagged at Bonneville Dam over several years indicated that 25-30% of lampreys that passed The Dalles Dam subsequently entered the Deschutes River (Moser et al 2002b), a tributary where adult escapement was at least 6,000 fish in a recent estimate (Graham and Brun 2005). Use of the Deschutes River potentially accounts for a relatively high proportion of the HDX-PITtagged fish that entered this reach and did not pass John Day Dam.…”

Section: Discussionmentioning

confidence: 99%

Effects of Body Size and River Environment on the Upstream Migration of Adult Pacific Lampreys

Keefer

Moser

Boggs

et al. 2009

N American J Fish Manag

101

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Dams in the Columbia River basin present significant obstacles to declining populations of anadromous Pacific lampreys Lampetra tridentata. Mitigation efforts have focused on fine‐scale improvements in passage at individual dams, but there is an increasing need for basinwide estimates of survival and escapement. We developed a half‐duplex passive integrated transponder (PIT) tag monitoring array at five Columbia and Snake River dams to evaluate adult lamprey migrations. We tagged 3,598 lampreys over 3 years and calculated the rates of main‐stem escapement through 15 river reaches. From these data, we assessed the relative effects of lamprey size, river discharge, water temperature, and migration timing on upstream passage. The results indicated high attrition as lampreys progressed upstream. In each year, about one‐half of the fish passed one dam, 28–33% passed two dams, 17–19% passed three dams, 4–5% passed four dams, and about 1% passed the first dam on the Snake River (five dams and >300 km upstream from their release sites). In most reaches, upstream passage was strongly size dependent, the largest lampreys being two to four times more likely to pass than the smallest fish. Lamprey size was more predictive of passage than were the river discharge, temperature, or migration timing variables. These findings suggest that adult Pacific lamprey migration is affected by physiological constraints and that effective mitigation for the difficult passage conditions at dams should include size‐related considerations.

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Determining Lamprey Species Composition, Larval Distribution, and Adult Abundance in the Deschutes River, Oregon, Subbasin; 2004-2005 Annual Report.

Cited by 5 publications

References 0 publications

Adult Pacific Lamprey Migration in the Lower Columbia River: 2007 Radiotelemetry and Half-duplex Pit Tag Studies

Adult Pacific Lamprey Migration in the Lower Columbia River: 2007 Radiotelemetry and Half-duplex Pit Tag Studies

Adult Pacific Lamprey Migration in the Lower Columbia River: 2011 Half-Duplex Pit Tag Studies

Effects of Body Size and River Environment on the Upstream Migration of Adult Pacific Lampreys

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