Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance
Studies of hydropeaking‐induced stranding mortality on fish populations have been confined to analysis of empirical data and/or short‐term hydraulic‐habitat modelling of individual events and are thus limited as to how they may be used to infer long‐term effects in fish populations. In this study, t...
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Online Access: | http://hdl.handle.net/11250/2496204 https://doi.org/10.1002/eco.1960 |
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ftninstnf:oai:brage.nina.no:11250/2496204 2024-06-23T07:51:12+00:00 Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance Hedger, Richard David Sauterleute, Julian Friedrich Sundt-Hansen, Line Elisabeth Breivik Forseth, Torbjørn Ugedal, Ola Diserud, Ola Håvard Bakken, Tor Haakon 2018 application/pdf http://hdl.handle.net/11250/2496204 https://doi.org/10.1002/eco.1960 eng eng Norges forskningsråd: 193818 urn:issn:1936-0584 http://hdl.handle.net/11250/2496204 https://doi.org/10.1002/eco.1960 cristin:1578243 Ecohydrology Atlantic salmon density‐dependent mortality hydropeaking population dynamics stranding mortality VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2018 ftninstnf https://doi.org/10.1002/eco.1960 2024-06-07T03:57:56Z Studies of hydropeaking‐induced stranding mortality on fish populations have been confined to analysis of empirical data and/or short‐term hydraulic‐habitat modelling of individual events and are thus limited as to how they may be used to infer long‐term effects in fish populations. In this study, the effects of stranding mortality on an Atlantic salmon population were simulated using an individual‐based Atlantic salmon population model with the objective of determining the sensitivity of population dynamics to stranding. It was found that density‐dependent mortality (an alternative source of mortality in juvenile Atlantic salmon) partially compensated for stranding mortality, acting as a negative feedback mechanism that dampened change in population abundance. Stranding caused a perturbation in population dynamics, and effects of individual stranding events persisted in time across the life stages of the population. Effects on population abundance depended on the time of year when stranding was applied, both because of intra‐annual changes in stranding mortality probability and because of intra‐annual changes in the ability of density‐dependent mortality to compensate for stranding mortality. We concluded that empirical measurements of stranding mortality have limited potential for inference of overall effects on the population, and a more dynamic modelling approach, incorporating system feedback, allows for a better modelling of the impact of stranding. Sensitivity analysis showed that population abundance was highly sensitive to density‐dependent mortality, and we suggest that this area should be prioritized for further research when investigating the effects of hydropeaking on rivers. acceptedVersion publishedVersion Article in Journal/Newspaper Atlantic salmon Norwegian Institute for Nature Research: Brage NINA Ecohydrology 11 5 e1960 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
Atlantic salmon density‐dependent mortality hydropeaking population dynamics stranding mortality VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
Atlantic salmon density‐dependent mortality hydropeaking population dynamics stranding mortality VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Hedger, Richard David Sauterleute, Julian Friedrich Sundt-Hansen, Line Elisabeth Breivik Forseth, Torbjørn Ugedal, Ola Diserud, Ola Håvard Bakken, Tor Haakon Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance |
topic_facet |
Atlantic salmon density‐dependent mortality hydropeaking population dynamics stranding mortality VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
Studies of hydropeaking‐induced stranding mortality on fish populations have been confined to analysis of empirical data and/or short‐term hydraulic‐habitat modelling of individual events and are thus limited as to how they may be used to infer long‐term effects in fish populations. In this study, the effects of stranding mortality on an Atlantic salmon population were simulated using an individual‐based Atlantic salmon population model with the objective of determining the sensitivity of population dynamics to stranding. It was found that density‐dependent mortality (an alternative source of mortality in juvenile Atlantic salmon) partially compensated for stranding mortality, acting as a negative feedback mechanism that dampened change in population abundance. Stranding caused a perturbation in population dynamics, and effects of individual stranding events persisted in time across the life stages of the population. Effects on population abundance depended on the time of year when stranding was applied, both because of intra‐annual changes in stranding mortality probability and because of intra‐annual changes in the ability of density‐dependent mortality to compensate for stranding mortality. We concluded that empirical measurements of stranding mortality have limited potential for inference of overall effects on the population, and a more dynamic modelling approach, incorporating system feedback, allows for a better modelling of the impact of stranding. Sensitivity analysis showed that population abundance was highly sensitive to density‐dependent mortality, and we suggest that this area should be prioritized for further research when investigating the effects of hydropeaking on rivers. acceptedVersion publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hedger, Richard David Sauterleute, Julian Friedrich Sundt-Hansen, Line Elisabeth Breivik Forseth, Torbjørn Ugedal, Ola Diserud, Ola Håvard Bakken, Tor Haakon |
author_facet |
Hedger, Richard David Sauterleute, Julian Friedrich Sundt-Hansen, Line Elisabeth Breivik Forseth, Torbjørn Ugedal, Ola Diserud, Ola Håvard Bakken, Tor Haakon |
author_sort |
Hedger, Richard David |
title |
Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance |
title_short |
Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance |
title_full |
Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance |
title_fullStr |
Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance |
title_full_unstemmed |
Modelling the effect of hydropeaking‐induced stranding mortality on Atlantic salmon population abundance |
title_sort |
modelling the effect of hydropeaking‐induced stranding mortality on atlantic salmon population abundance |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2496204 https://doi.org/10.1002/eco.1960 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Ecohydrology |
op_relation |
Norges forskningsråd: 193818 urn:issn:1936-0584 http://hdl.handle.net/11250/2496204 https://doi.org/10.1002/eco.1960 cristin:1578243 |
op_doi |
https://doi.org/10.1002/eco.1960 |
container_title |
Ecohydrology |
container_volume |
11 |
container_issue |
5 |
container_start_page |
e1960 |
_version_ |
1802642222280081408 |