Rehabilitation of two northern river lamprey (Lampetra fluviatilis) populations impacted by various anthropogenic pressures : lessons learnt in the past three decades

Aronsuu, Kimmo; Vikström, Risto; Marjomäki, Timo J.; Wennman, Kim; Pakkala, Jukka; Mäenpää, Eero; Tuohino, Jukka; Sarell, Juha; Ojutkangas, Esa

doi:10.17011/jyx/18282/64592

Cited by 7 publications

(2 citation statements)

References 48 publications

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“…Excavating and then sifting the fine sediment contained within the excavated substrate with fine‐mesh (0.5–1.0‐mm) sifters constitute another active method that can be used to collect larval lampreys (Lasne et al 2010; Aronsuu et al 2019). Sediment can be excavated by dredging (Lasne et al 2010) or by shoveling (Aronsuu et al 2019) and then transferred to a sifter to separate the lampreys from the substrate. Excavation surveys typically occur when streamflow is low—during the summer to early fall in the Northern Hemisphere (Harvey and Cowx 2003; LATF 2019).…”

Section: Sampling Methodsmentioning

confidence: 99%

“…Mullet and Type III (unacceptable) "unacceptable for burrowing, consisting of bedrock, hardpan clay, rubble, or coarse gravel" used to collect larval lampreys (Lasne et al 2010;Aronsuu et al 2019). Sediment can be excavated by dredging (Lasne et al 2010) or by shoveling (Aronsuu et al 2019) and then transferred to a sifter to separate the lampreys from the substrate. Excavation surveys typically occur when streamflow is low-during the summer to early fall in the Northern Hemisphere (Harvey and Cowx 2003;LATF 2019).…”

Section: Habitat Definition Sourcementioning

confidence: 99%

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Sampling Methods and Survey Designs for Larval Lampreys

Clemens

Harris

Starcevich

et al. 2022

N American J Fish Manag

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Knowledge of the biology, distribution, and abundance of lampreys (Petromyzontiformes) is critical to inform conservation actions for native species and to inform control measures for the invasive Sea Lamprey Petromyzon marinus of the Laurentian Great Lakes. Lampreys have complex life cycles that include a freshwater larval stage in which they burrow into substrates consisting of fine sediment and organic matter. The larval stage is frequently targeted in research and monitoring; given this interest, a review of survey designs and methods is needed. Our review identified 12 different sampling methods for larval lampreys and focused on one common method-backpack electrofishing in wadeable habitats. Our review also identified eight research and monitoring questions that have been addressed for larval lampreys in field studies, including distribution, species identification, life stage occurrence, abundance, length frequency, habitat use, residence and movement phenology, and species status. Each question provides unique information and poses distinct challenges to data acquisition and interpretation. The objectives guide decisions about study design and scope of inference. The scope of inference is determined by the size, spatial distribution,

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