Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival?
Repeat spawners constitute an important component of Atlantic salmon populations, but survival of post-spawning individuals (kelts) are often compromised by anthropogenic structures such as hydropower plants (HPPs). Potential effects of HPPs include migration delays and associated increased energy d...
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ftrepec:oai:RePEc:gam:jsusta:v:12:y:2020:i:18:p:7341-:d:410181 2024-04-14T08:09:04+00:00 Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival? Henrik Baktoft Karl Ø. Gjelland Marcell Szabo-Meszaros Ana T. Silva Milan Riha Finn Økland Knut Alfredsen Torbjørn Forseth https://www.mdpi.com/2071-1050/12/18/7341/pdf https://www.mdpi.com/2071-1050/12/18/7341/ unknown https://www.mdpi.com/2071-1050/12/18/7341/pdf https://www.mdpi.com/2071-1050/12/18/7341/ article ftrepec 2024-03-19T10:36:23Z Repeat spawners constitute an important component of Atlantic salmon populations, but survival of post-spawning individuals (kelts) are often compromised by anthropogenic structures such as hydropower plants (HPPs). Potential effects of HPPs include migration delays and associated increased energy depletion, which potentially results in increased overall mortality. We combined a detailed 3D hydraulic model with high-resolution 3D tracking of tagged kelts (length 73–104 cm) to obtain estimates of kelt movement through water. These estimates were then used in an energetics model to estimate hourly energy expenditure while negotiating the HPP area. Hourly kelt energy expenditure varied between 0.8 and 10.1 kJ × h −1 and was dependent on kelt length. Degree of additional energy depletion can amount to several percent of remaining energy content (our study indicates 4–5 percentage points) potentially leading to reduced post-spawning survival. In turn, this can nullify the iteroparous breeding strategy and jeopardize long-term stability and persistence of Atlantic salmon populations inhabiting HPP rivers. high-resolution 3D telemetry; 3D hydraulic modeling; anthropogenic structures; river connectivity; energetics model; energy expenditure Article in Journal/Newspaper Atlantic salmon RePEc (Research Papers in Economics) |
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RePEc (Research Papers in Economics) |
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ftrepec |
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description |
Repeat spawners constitute an important component of Atlantic salmon populations, but survival of post-spawning individuals (kelts) are often compromised by anthropogenic structures such as hydropower plants (HPPs). Potential effects of HPPs include migration delays and associated increased energy depletion, which potentially results in increased overall mortality. We combined a detailed 3D hydraulic model with high-resolution 3D tracking of tagged kelts (length 73–104 cm) to obtain estimates of kelt movement through water. These estimates were then used in an energetics model to estimate hourly energy expenditure while negotiating the HPP area. Hourly kelt energy expenditure varied between 0.8 and 10.1 kJ × h −1 and was dependent on kelt length. Degree of additional energy depletion can amount to several percent of remaining energy content (our study indicates 4–5 percentage points) potentially leading to reduced post-spawning survival. In turn, this can nullify the iteroparous breeding strategy and jeopardize long-term stability and persistence of Atlantic salmon populations inhabiting HPP rivers. high-resolution 3D telemetry; 3D hydraulic modeling; anthropogenic structures; river connectivity; energetics model; energy expenditure |
format |
Article in Journal/Newspaper |
author |
Henrik Baktoft Karl Ø. Gjelland Marcell Szabo-Meszaros Ana T. Silva Milan Riha Finn Økland Knut Alfredsen Torbjørn Forseth |
spellingShingle |
Henrik Baktoft Karl Ø. Gjelland Marcell Szabo-Meszaros Ana T. Silva Milan Riha Finn Økland Knut Alfredsen Torbjørn Forseth Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival? |
author_facet |
Henrik Baktoft Karl Ø. Gjelland Marcell Szabo-Meszaros Ana T. Silva Milan Riha Finn Økland Knut Alfredsen Torbjørn Forseth |
author_sort |
Henrik Baktoft |
title |
Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival? |
title_short |
Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival? |
title_full |
Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival? |
title_fullStr |
Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival? |
title_full_unstemmed |
Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival? |
title_sort |
can energy depletion of wild atlantic salmon kelts negotiating hydropower facilities lead to reduced survival? |
url |
https://www.mdpi.com/2071-1050/12/18/7341/pdf https://www.mdpi.com/2071-1050/12/18/7341/ |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
https://www.mdpi.com/2071-1050/12/18/7341/pdf https://www.mdpi.com/2071-1050/12/18/7341/ |
_version_ |
1796306519547969536 |