Transoceanic Migration of Pacific Lamprey, Entosphenus tridentatus

Murauskas, Joshua G.; Орлов, А. М.; Keller, Laurent; Мазникова, О. А.; Glebov, I. I.

doi:10.1134/s0032945219020115

Cited by 12 publications

(7 citation statements)

References 4 publications

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“…It was beyond the scope of this study to quantify the relative proportions of Snake River‐origin Pacific Lamprey that utilized destinations outside of the Columbia River to return to spawn. However, Pacific Lamprey have been demonstrated to travel long distances in the ocean based on an individual that was PIT‐tagged in the Bering Sea and later detected in the Deschutes River (>5,000 km apart; Murauskas et al 2019). Our sibship results provided additional evidence that Pacific Lamprey travel long ocean distances based on the fact that full siblings can be found in the Bering Sea and at Willamette Falls.…”

Section: Discussionmentioning

confidence: 99%

Pacific Lamprey Translocations to the Snake River Boost Abundance of All Life Stages

et al. 2022

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The Pacific Lamprey Entosphenus tridentatus is an anadromous fish that has severely declined in the Snake River basin. In 2007, the Nez Perce Tribe initiated translocation of adults to this region from the main-stem Columbia River and has continued the translocations to this day. These actions are aimed at restoring larval abundance along with holistic habitat improvements. We performed parentage and sibship analyses with 260 single-nucleotide polymorphism loci to monitor productivity of translocated lamprey over a decade (2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017)(2018). These results provide the first direct evidence that translocations boosted larval abundance, increased juvenile production in the interior Columbia River (~3% in 2017 and 2018), and demonstrated successful migration to the Pacific Ocean. Per capita juvenile production from Snake River adult lamprey translocations out-performed that of their volitionally migrating counterparts in the interior Columbia River, demonstrating that translocating adults to suitable habitats increased overall productivity. We projected that the translocations may eventually return enough adult offspring to the Columbia River to replace the annual take of adults for translocations, despite many adults likely returning to other basins. These translocations are also restoring Pacific Lamprey to historical areas where they had been nearly extirpated, which has impactful benefits both culturally and ecologically. Further, this study provided an unprecedented volume of data that has redefined key biological attributes, including timing of life stage transformation (average of 6.7-year-old juveniles), larval growth rates (~22 mm/year for the first 4 years), ocean duration (average of 5.1 years), dispersal (~3% of Snake River-origin adults that return to the Columbia River will divert to the Willamette River), and life span (median age of postspawn adults was 12.9 years). We even quantified a new biological phenomenon of delayed spawning, which occurs at low rates (~9%) in nature. These data provide an opportunity to monitor ongoing translocation efforts and inform adaptive management to aid species recovery.

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Section: Discussionmentioning

confidence: 99%

Pacific Lamprey Translocations to the Snake River Boost Abundance of All Life Stages

et al. 2022

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“…The fact that Pacific Lamprey are capable of migrating vast distances in the ocean (e.g., between the Bering Sea and the Columbia River; Murauskas et al. 2019) and yet Snake River‐origin fish do not exhibit higher rates of dispersal into tributaries outside of the Columbia River is a mystery that remains to be explained.…”

Section: Discussionmentioning

confidence: 99%

“…However, they are helpful for understanding why there can be seemingly low rates of dispersal across spawning segments yet sufficient gene flow to maintain a single population. The fact that Pacific Lamprey are capable of migrating vast distances in the ocean (e.g., between the Bering Sea and the Columbia River; Murauskas et al 2019) and yet Snake River-origin fish do not exhibit higher rates of dispersal into tributaries outside of the Columbia River is a mystery that remains to be explained.…”

Section: Revisiting the Notion That Pacific Lamprey Do Not Home To Na...mentioning

confidence: 99%

The return of the adult Pacific Lamprey offspring from translocations to the Columbia River

Hess,

Lampman,

Jackson

et al. 2023

N American J Fish Manag

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Pacific Lamprey is a valuable species to tribal culture and to the ecosystem, but abundance in the interior Columbia River has been highly variable and muted in recent years. Translocation programs have been adopted as a proactive strategy to restore Pacific Lamprey abundance to the interior Columbia River, including the Snake River Basin, and these efforts have been largely successful in increasing larval and juvenile abundance in the recipient watersheds and further downstream. In this study, we show that not only have Snake River translocation offspring returned as adults to Bonneville Dam in numbers that exceeded model projections, but offspring from two other tribal translocation programs in the Umatilla (Northeast Oregon) and Yakima (South Central Washington) rivers have also begun to be detected in recent years with offspring produced across all three translocation programs estimated at approximately 1,065 fish in 2021. While Pacific Lamprey is known to lack precise natal homing which may limit benefits of translocations in the interior Columbia River Basin, evidence from detections in this study supports preference for interior Columbia River Pacific Lamprey to return home and migrate toward their natal basins. However, a portion of Snake River origin Pacific Lamprey was estimated to deviate from mainstem routes into tributaries including tribal ceded areas where tribal harvest occurs such as Sherars Falls in the Deschutes River. These results indicate benefits from translocation programs of Pacific Lamprey that not only increase abundance to targeted areas but will also increase tribal harvest opportunities for this culturally important species.

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“…The possibility that Pacific Lampreys originating from the west coast may reside in the Bering Sea (and therefore comprise a single, widely dispersed population; Murauskas et al. 2016) is an important topic that deserves further investigation for both biological interest and conservation implications.…”

Section: Discussionmentioning

confidence: 99%

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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Transoceanic Migration of Pacific Lamprey, Entosphenus tridentatus

Cited by 12 publications

References 4 publications

Pacific Lamprey Translocations to the Snake River Boost Abundance of All Life Stages

Pacific Lamprey Translocations to the Snake River Boost Abundance of All Life Stages

The return of the adult Pacific Lamprey offspring from translocations to the Columbia River

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

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