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Upstream movement of river lamprey through a culvert retrofitted with spoiler baffles under experimental conditions

Upstream movement of river lamprey through a culvert retrofitted with spoiler baffles under experimental conditions
Upstream movement of river lamprey through a culvert retrofitted with spoiler baffles under experimental conditions
Culverts used to convey river water under roads and embankments are one of the most common small-scale barriers to longitudinal fish movements worldwide. Using an open channel flume, this study assessed the ability of upstream migrating adult river lamprey (Lampetra fluviatilis) to ascend a pipe culvert when unmodified (control [C]) and retrofitted with spoiler baffles (treatment [T]) under three flow regimes (low discharge [L], high discharge [H] and high discharge with a raised downstream water level [HD]). Few lamprey attempted to ascend the culvert under low (11%) and high (21%) discharge in both the control and treatments. Despite a greater percentage attempting to pass (75%) under HD, they frequently failed. Contrary to our predictions, upstream progress was impeded by the spoiler baffles and may reflect low motivation or avoidance of the physical and/or hydraulic conditions encountered. This study emphasises the need to better understand factors influencing the behaviour and motivation of fish as they ascend fish passage structures, and of the importance of reporting negative results as fish passage solutions that are promising for some species may be ineffective for others.
2470-5365
99-107
Vowles, Andrew
c35c3a75-2199-4665-8340-e8ee7abc25f4
Karageorgopoulos, Perikles
d8f4cf26-5ac0-4f70-bb9a-baab3980014f
Kemp, Paul
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
Vowles, Andrew
c35c3a75-2199-4665-8340-e8ee7abc25f4
Karageorgopoulos, Perikles
d8f4cf26-5ac0-4f70-bb9a-baab3980014f
Kemp, Paul
9e33fba6-cccf-4eb5-965b-b70e72b11cd7

Vowles, Andrew, Karageorgopoulos, Perikles and Kemp, Paul (2019) Upstream movement of river lamprey through a culvert retrofitted with spoiler baffles under experimental conditions. Journal of Ecohydraulics, 3 (2), 99-107. (doi:10.1080/24705357.2018.1555777).

Record type: Article

Abstract

Culverts used to convey river water under roads and embankments are one of the most common small-scale barriers to longitudinal fish movements worldwide. Using an open channel flume, this study assessed the ability of upstream migrating adult river lamprey (Lampetra fluviatilis) to ascend a pipe culvert when unmodified (control [C]) and retrofitted with spoiler baffles (treatment [T]) under three flow regimes (low discharge [L], high discharge [H] and high discharge with a raised downstream water level [HD]). Few lamprey attempted to ascend the culvert under low (11%) and high (21%) discharge in both the control and treatments. Despite a greater percentage attempting to pass (75%) under HD, they frequently failed. Contrary to our predictions, upstream progress was impeded by the spoiler baffles and may reflect low motivation or avoidance of the physical and/or hydraulic conditions encountered. This study emphasises the need to better understand factors influencing the behaviour and motivation of fish as they ascend fish passage structures, and of the importance of reporting negative results as fish passage solutions that are promising for some species may be ineffective for others.

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Accepted/In Press date: 2 December 2018
e-pub ahead of print date: 19 January 2019

Identifiers

Local EPrints ID: 426961
URI: http://eprints.soton.ac.uk/id/eprint/426961
ISSN: 2470-5365
PURE UUID: 7d631815-5737-4743-8f4a-ca62e7348593
ORCID for Paul Kemp: ORCID iD orcid.org/0000-0003-4470-0589

Catalogue record

Date deposited: 19 Dec 2018 17:30
Last modified: 07 Oct 2020 01:51

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