Seasonal abundance, size, and host selection of western river (Lampetra ayresii) and Pacific (Entosphenus tridentatus) lampreys in the Columbia River estuary

Weitkamp, Laurie A.; Hinton, Susan A.; Bentley, Paul

doi:10.7755/fb.113.2.9

Cited by 19 publications

(30 citation statements)

References 21 publications

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“…Similarly, Pacific Lampreys and Western River Lampreys were observed feeding on a variety of hosts in the Columbia River estuary (Weitkamp et al. ). Similar predation events on juvenile salmon can be expected to occur in the western Alaska river deltas due to the close proximity of Arctic Lampreys to the estuaries of the Yukon and Kuskokwim rivers, and sampling of these habitats could find concentrations of lampreys not identified by this study.…”

Section: Discussionmentioning

confidence: 93%

“…For example, Arctic Lampreys in the western Bering Sea were estimated to consume 75% of Pink Salmon and Chum Salmon smolts in the Amur River estuary (Novomodnyy and Belyaev 2002), and Western River Lampreys fed on Pacific Herring and Pacific salmon smolts in the nearshore Fraser River plume (Beamish and Neville 1995). Similarly, Pacific Lampreys and Western River Lampreys were observed feeding on a variety of hosts in the Columbia River estuary (Weitkamp et al 2015). Similar predation events on juvenile salmon can be expected to occur in the western Alaska river deltas due to the close proximity of Arctic Lampreys to the estuaries of the Yukon and Kuskokwim rivers, and sampling of these habitats could find concentrations of lampreys not identified by this study.…”

Section: Contrasting Arctic Lampreys and Pacific Lampreysmentioning

confidence: 99%

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Spatial Differences in the Distributions of Arctic and Pacific Lampreys in the Eastern Bering Sea

Siwicke

Seitz

2018

Trans Am Fish Soc

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The Arctic Lamprey Lethenteron camtschaticum and Pacific Lamprey Entosphenus tridentatus are ecologically and culturally valuable native species that co‐occur in the eastern Bering Sea. Lamprey wounds are often observed on fishes in this region, yet there is a paucity of information on the distribution of anadromous lampreys, lamprey–host interactions, and foraging behavior in the ocean. Our hypothesis was that each lamprey species would be positively associated (distribution and abundance) with their presumed hosts: Arctic Lampreys with smaller fishes that could easily be killed, and Pacific Lampreys with larger hosts that could sustain blood feeding. To examine lamprey distribution, abundance, and associations, we utilized data from two fishery‐independent surveys—one epipelagic trawl survey and one benthic trawl survey—conducted between 2002 and 2012 in the eastern Bering Sea. Distinct distributions of lamprey species were evident in models of their presence and absence by latitude and longitude. Arctic Lampreys inhabited the northern regions on the inner/middle continental shelf in depths less than 100 m, while Pacific Lampreys inhabited waters deeper than 150 m along the continental slope. Pacific Herring Clupea pallasii and juvenile salmonids were found in regions with relatively high Arctic Lamprey catches in the epipelagic trawl survey, and catches of lampreys and these potential hosts were positively correlated. Demersal groundfishes were found in regions with relatively high Pacific Lamprey abundance in the benthic trawl survey, but catches of Pacific Lampreys and these hosts were not consistent. We conclude that Arctic Lampreys and Pacific Lampreys are segregated in the eastern Bering Sea, and although differences in their distributions may be explained by species‐specific host preferences, alternate explanations include differences in seasonal movements, source river locations, and marine residence times. This study provides an initial baseline of the oceanic ecology of lampreys, which increases our understanding of species‐specific differences beyond traditional freshwater studies.

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Section: Discussionmentioning

confidence: 93%

Section: Contrasting Arctic Lampreys and Pacific Lampreysmentioning

confidence: 99%

Spatial Differences in the Distributions of Arctic and Pacific Lampreys in the Eastern Bering Sea

Siwicke

Seitz

2018

Trans Am Fish Soc

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“…Western river lamprey can be common in estuaries (Vladykov and Follett 1958;Weitkamp et al 2015), but records from upstream of Bonneville Dam are scarce (Vladykov and Follett 1958;Jolley et al 2016). Western brook lamprey are not highly migratory (Moser et al 2015a) and there may be multiple highly localized riverine populations in the Columbia River Basin that may not use tributary river mouths (USFWS unpublished data).…”

Section: R a F Tmentioning

confidence: 99%

Estimation of occupancy, density, and abundance of larval lampreys in tributary river mouths upstream of dams on the Columbia River, Washington and Oregon

Harris

Jolley

2017

Can. J. Fish. Aquat. Sci.

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We estimated occupancy, density, and abundance of larval Pacific lamprey (Entosphenus tridentatus) and Lampetra spp. in tributary river mouths to impounded portions of the Columbia River, Washington and Oregon, using count data from deepwater electrofishing. Count data were analyzed by Bayesian methods using zero-inflated N-mixture models modified to include our experimentally derived estimate of capture probability of 0.70 (95% CI: 0.63–0.77). Lampetra spp. were only collected in river mouths in Bonneville Reservoir, while Pacific lamprey were also captured from river mouths in The Dalles and John Day reservoirs. In occupied river mouths, mean densities were commonly 0.2–0.3·m−2, but ranged from 0.18 to 1.72·m−2 for Pacific lamprey and 0.24 to 1.72·m−2 for Lampetra spp. Although there was spatial overlap, estimated density peaked in the Klickitat River mouth (556 600 larvae) for Pacific lamprey and in the Wind River mouth (544 800 larvae) for Lampetra spp. Our study demonstrates considerable larval rearing in river mouths to impounded portions of the Columbia River; however, information on survival is needed to evaluate the contribution of this production to population growth and conservation.

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“…Ammocoetes eventually metamorphose into macrophthalmia and migrate downstream to the Pacific Ocean. Ammocoetes are known to occur in shallow-stream sediments, but their use of comparatively large river habitats in relatively deeper areas is poorly understood (Jolley et al 2012;Weitkamp et al 2015). Adult Pacific Lamprey migrate in the late spring and early summer in the Columbia River.…”

mentioning

confidence: 99%

Video‐Based Electroshocking Platform to Identify Lamprey Ammocoete Habitats: Field Validation and New Discoveries in the Columbia River Basin

Arntzen

Mueller

2017

N American J Fish Manag

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A deepwater electroshocking platform (DEP), developed to sample larval lampreys (ammocoetes) and associated habitat in depths up to 15 m, was recently tested in the field. Searches were conducted at a known rearing location (mouth of the Wind River, Washington) and at locations on the Cowlitz River, Washington, where ammocoetes had not previously been found. At the Wind River, video‐imaged ammocoetes ranged from 50 to 150 mm in water depths between 1.5 and 4.5 m, and were more common in sediments containing organic silt. Ammocoetes (n = 137) were detected at 61% (summer) and 50% (winter). Following the field verification, the DEP was used on the lower 11.7 km of the Cowlitz River. Ammocoetes (n = 41) were found at 26% specific search locations. Cowlitz River sediment containing ammocoetes was also dominated by silt with organic material, often downstream of alluvial bars in water depths from 0.8 to 1.7 m. Test results indicated the DEP was successful at detecting ammocoetes with little to no impact in relation to other sampling methods. The DEP can also be used to characterize lamprey ammocoete habitats. Received October 21, 2016; accepted March 17, 2017 Published online May 12, 2017

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Seasonal abundance, size, and host selection of western river (Lampetra ayresii) and Pacific (Entosphenus tridentatus) lampreys in the Columbia River estuary

Abstract: Abstract-Little is known about the basic biology and ecology of most native lampreys, including the use of estuaries by anadromous lampreys.

Cited by 19 publications

References 21 publications

Spatial Differences in the Distributions of Arctic and Pacific Lampreys in the Eastern Bering Sea

Spatial Differences in the Distributions of Arctic and Pacific Lampreys in the Eastern Bering Sea

Estimation of occupancy, density, and abundance of larval lampreys in tributary river mouths upstream of dams on the Columbia River, Washington and Oregon

Video‐Based Electroshocking Platform to Identify Lamprey Ammocoete Habitats: Field Validation and New Discoveries in the Columbia River Basin

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