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A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes

Merryn Thomas, Sayali K. Pawar, Stephanie Januchowski-Hartley

Conservation Science and Practice, Volume: 3, Issue: 9

Swansea University Authors: Merryn Thomas, Stephanie Januchowski-Hartley

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DOI (Published version): 10.1111/csp2.485

Abstract

Conservation efforts are hampered by limited understanding about how different types of instream infrastructure impact migration patterns and fish survival. We used a rapid, fully online IDEA protocol to elicit expert judgments for the passability of seven different in-stream infrastructures to elve...

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Published in: Conservation Science and Practice
ISSN: 2578-4854 2578-4854
Published: Wiley 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa57436
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first_indexed 2021-07-22T09:14:52Z
last_indexed 2021-09-25T03:20:52Z
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spelling 2021-09-24T16:58:11.1099952 v2 57436 2021-07-22 A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes 82aca05941f2ff78c16feb32b01acca9 Merryn Thomas Merryn Thomas true false b634c6a9429ed84ced10e9033d27659d Stephanie Januchowski-Hartley Stephanie Januchowski-Hartley true false 2021-07-22 PHAC Conservation efforts are hampered by limited understanding about how different types of instream infrastructure impact migration patterns and fish survival. We used a rapid, fully online IDEA protocol to elicit expert judgments for the passability of seven different in-stream infrastructures to elver European eels (Anguilla anguilla) in Great Britain. Nine experts provided judgments via our online survey, followed by a second elicitation via email for reflection and adjustment of initial estimates. We found that on average, bridges were judged the most passable (95% passability), followed by fords, nonperched culverts, weirs, sluices, dams, and perched culverts (7%). Results showed a high degree of agreement about how passable bridges and perched culverts are for elver eels, but less certainty about other infrastructure. Thirty-four distinct factors were identified that experts believed influence infrastructure passability for elver eels, including: the structure itself, hydraulics, elver characteristics, obstructions (e.g., debris accumulation), and vegetation (e.g., to aid climbing). We discuss how our rapid, online-only variation on the IDEA protocol compares with the more traditional protocol, and how the expert estimates generated in this study can be used in future scenario building and connectivity modeling, with a view to improving conservation to support species persistence. Journal Article Conservation Science and Practice 3 9 Wiley 2578-4854 2578-4854 1 9 2021 2021-09-01 10.1111/csp2.485 COLLEGE NANME Public Health COLLEGE CODE PHAC Swansea University SU Library paid the OA fee (TA Institutional Deal) European Regional Development Fund Grant/Award Number: 80761-SU-140 2021-09-24T16:58:11.1099952 2021-07-22T10:09:48.1006648 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Merryn Thomas 1 Sayali K. Pawar 2 Stephanie Januchowski-Hartley 3 57436__20682__56c2102e8a2c453e91d1da1f8bd1cf28.pdf 57436.pdf 2021-08-19T16:09:26.3622872 Output 2202197 application/pdf Version of Record true © 2021 The Authors. This is an open access article under the terms of the Creative Commons Attribution Licens true eng http://creativecommons.org/licenses/by/4.0/
title A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes
spellingShingle A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes
Merryn Thomas
Stephanie Januchowski-Hartley
title_short A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes
title_full A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes
title_fullStr A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes
title_full_unstemmed A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes
title_sort A European eel (Anguilla anguilla) case study using structured elicitation to estimate instream infrastructure passability for freshwater fishes
author_id_str_mv 82aca05941f2ff78c16feb32b01acca9
b634c6a9429ed84ced10e9033d27659d
author_id_fullname_str_mv 82aca05941f2ff78c16feb32b01acca9_***_Merryn Thomas
b634c6a9429ed84ced10e9033d27659d_***_Stephanie Januchowski-Hartley
author Merryn Thomas
Stephanie Januchowski-Hartley
author2 Merryn Thomas
Sayali K. Pawar
Stephanie Januchowski-Hartley
format Journal article
container_title Conservation Science and Practice
container_volume 3
container_issue 9
publishDate 2021
institution Swansea University
issn 2578-4854
2578-4854
doi_str_mv 10.1111/csp2.485
publisher Wiley
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
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description Conservation efforts are hampered by limited understanding about how different types of instream infrastructure impact migration patterns and fish survival. We used a rapid, fully online IDEA protocol to elicit expert judgments for the passability of seven different in-stream infrastructures to elver European eels (Anguilla anguilla) in Great Britain. Nine experts provided judgments via our online survey, followed by a second elicitation via email for reflection and adjustment of initial estimates. We found that on average, bridges were judged the most passable (95% passability), followed by fords, nonperched culverts, weirs, sluices, dams, and perched culverts (7%). Results showed a high degree of agreement about how passable bridges and perched culverts are for elver eels, but less certainty about other infrastructure. Thirty-four distinct factors were identified that experts believed influence infrastructure passability for elver eels, including: the structure itself, hydraulics, elver characteristics, obstructions (e.g., debris accumulation), and vegetation (e.g., to aid climbing). We discuss how our rapid, online-only variation on the IDEA protocol compares with the more traditional protocol, and how the expert estimates generated in this study can be used in future scenario building and connectivity modeling, with a view to improving conservation to support species persistence.
published_date 2021-09-01T04:13:10Z
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