Distribution of Pacific Lamprey<i>Entosphenus tridentatus</i>in Watersheds of Puget Sound Based on Smolt Monitoring Data

Hayes, Michael C.; Hays, Richard; Rubin, Stephen P.; Chase, Dorothy M.; Hallock, Molly; Cook‐Tabor, Carrie; Luzier, Christina W.; Moser, Mary L.

doi:10.3955/046.087.0202

Cited by 15 publications

(27 citation statements)

References 21 publications

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“…Bond et al (1983) reported western river lamprey in the Columbia River estuary, in Yaquina Bay on the Oregon coast, and nearby in marine waters from May through September. Hayes et al (2013) stated that western river lamprey juveniles were common in downstream salmon smolt traps in Puget Sound in all months of operation (February-August), and the highest abundances occurred during June-August. For western river lamprey populations in Canada, Beamish (1980) reported the highest abundances in the Fraser River estuary in late May and in the Fraser River plume from early May through early July.…”

Section: Discussion Lamprey In the Columbia River Estuarymentioning

confidence: 99%

“…org/smolt/SMP_queries.html, accessed August 2013). Hayes et al (2013) indicated that, in Puget Sound, downstream migration of Pacific lamprey juveniles occurs during fall or winter, on the basis of the absence of that life stage in salmon smolt traps, which typically only operate during spring and summer. Moreover, in Tenmile Creek on the Oregon coast, van de Wetering (1998) observed peak downstream migration of juvenile Pacific lamprey during November and December, slightly earlier than the timing observed in our analysis for the Columbia River estuary but consistent with the patterns described by Kan (1975) for large versus small rivers.…”

Section: Discussion Lamprey In the Columbia River Estuarymentioning

confidence: 99%

“…As with other lamprey studies (e.g., Hayes et al, 2013), we relied on data from research projects where-although lampreys were caught and recorded-lampreys were not specifically the focus of the study. In addition, in the CREDDP, lampreys and other fishes were sampled only during fall and winter of a single year; therefore we were unable to estimate interannual variability in the timing of winter migrations of Pacific lamprey.…”

Section: Fishes With Lamprey Woundsmentioning

confidence: 99%

“…Compared with Pacific lamprey, western river lamprey have a much shorter ocean residence (3-4 months), adults are much smaller, and timing of transitions between life stages differs (Beamish, 1980;Hayes et al, 2013). During the parasitic phase, the mode of feeding also differs between the 2 species: Pacific lamprey consume their host's blood, but western river lamprey bite off pieces of flesh (Cochran, 1986;Beamish and Neville, 1995).…”

mentioning

confidence: 99%

“…Like most lampreys (family Petromyzontidae), both of these species have complex life cycles that include an extended larval stage (the ammocoete stage) and a relatively brief adult stage (Hardisty, 2006). Both western river and Pacific lampreys are anadromous and parasitic as adults (Beamish, 1980;Wydowski and Whitney, 2003); however, many details concerning their life cycle and ecology are poorly understood, and most available information comes from a few geographic areas (Beamish, 1980;Hayes et al, 2013).…”

mentioning

confidence: 99%

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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

Weitkamp¹,

Hinton²,

Bentley³

2015

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Section: Discussion Lamprey In the Columbia River Estuarymentioning

confidence: 99%

Section: Discussion Lamprey In the Columbia River Estuarymentioning

confidence: 99%

Section: Fishes With Lamprey Woundsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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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

Weitkamp¹,

Hinton²,

Bentley³

2015

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Pacific Lamprey and Western River Lamprey marine ecology: Insight from new ocean collections

Weitkamp

Tuttle

Ward

et al. 2023

N American J Fish Manag

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Little is known about the marine ecology of anadromous Pacific Lamprey Entosphenus tridentatus and Western River Lamprey Lampetra ayresii. This information is needed to determine how marine life regulates adult abundances and identify management actions that may benefit declining populations. To address this deficit, we compiled historic data, collected lamprey from marine stock assessment surveys and commercial fisheries, and documented fish with Pacific Lamprey wounds. Pacific Lamprey were most commonly caught by midwater trawls targeting Pacific Hake Merluccius productus along the continental shelf break from northern California to northern Washington. Pacific Lamprey ranged in size from 115 mm total length (TL) and 2.9 g to 714 mm TL and 655g (n = 1,912), and were expected to represent multiple ocean ages. The vast majority (93%) of Pacific Lamprey were small (< 300 mm TL), likely in their first year in marine waters. Growth for small Pacific Lamprey was estimated as 0.37 mm/d and 0.13 g/d over the summer. Gut fullness for Pacific Lamprey was high (5.5% of body weight [BW]), but highly variable for larger individuals (range 0‐55% BW). Our results suggest there is a positive relationship between calendar day and lamprey length and condition factor in most years, while the effect of latitude varies by life stage. We documented Pacific Lamprey wounds on 240 individual fish, representing 16 species, of which 6 species are new lamprey hosts. We had comparably few records for Western River Lamprey (n = 72; mean length = 285.5 mm TL), which were primarily found in surface waters on the continental shelf from northern California to southern British Columbia. Our results have implications for both fisheries and conservation management, including development of best practices for lamprey caught by net fisheries, and using new marine information to inform conservation actions.

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Behavior and potential threats to survival of migrating lamprey ammocoetes and macrophthalmia

Moser

Jackson

Lucas

et al. 2014

Rev Fish Biol Fisheries

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(2014) 'Behavior and potential threats to survival of migrating lamprey ammocoetes and macrophthalmia.', Reviews in sh biology and sheries., 25 (1). pp. 103-116. Further information on publisher's website:http://dx.doi.org/10.1007/s11160-014-9372-8Publisher's copyright statement:The nal publication is available at Springer via http://dx.doi.org/10.1007/s11160-014-9372-8Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract: Upon metamorphosis, anadromous juvenile lamprey (macrophthalmia) exhibit distinct migration behaviors that take them from larval rearing habitats in streams to the open ocean. While poorly studied, lamprey larvae (ammocoetes) also engage in downstream movement to some degree. Like migrating salmon smolts, lamprey macrophthalmia undergo behavioral changes associated with a highly synchronized metamorphosis. Unlike salmon smolts, the timing of juvenile migration in lamprey is protracted and poorly documented. Lamprey macrophthalmia and ammocoetes are not strong swimmers, attaining maximum individual speeds of less than 1 m s 1, and sustained speeds of less than 0.5 m s 1. They are chiefly nocturnal and distribute throughout the water column, but appear to concentrate near the bottom in the thalweg of deep rivers. At dams and irrigation diversions, macrophthalmia can become impinged on screens or entrained in irrigation canals, suffer increased predation, and experience physical injury that may result in direct or delayed mortality. The very structures designed to protect migrating juvenile salmonids can be harmful to juvenile lamprey. Yet at turbine intakes and spillways, lampreys, which have no swim bladder, can withstand changes in pressure and shear stress large enough to injure or kill most teleosts. Lamprey populations are in decline in many parts of the world, with some species designated as species of concern for conservation that merit legally mandated protections. Hence, provisions for safe passage of juvenile lamprey are being considered at dams and water diversions in North America and Europe.Response to Reviewers: I have made the suggested changes to the figures and acknowledgements section. I agree that the two photos can be combined on one figure and that has been done and the text has been revised to reflect this change. All of the figures have been re-done as suggested and in each case Times New Roman font (16 pt) was used for axis titles (14 pt for axis labels). 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 3...

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Distribution of Pacific LampreyEntosphenus tridentatusin Watersheds of Puget Sound Based on Smolt Monitoring Data

Cited by 15 publications

References 21 publications

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

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

Pacific Lamprey and Western River Lamprey marine ecology: Insight from new ocean collections

Behavior and potential threats to survival of migrating lamprey ammocoetes and macrophthalmia

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