Passage through a hydropower plant affects the physiological and health status of Atlantic salmon smolts

Ammar, Imen Ben; Baeklandt, Sébastien; Cornet, Valérie; Antipine, Sascha; Sonny, Damien; Mandiki, Syaghalirwa N.M.; Kestemont, Patrick

doi:10.1016/j.cbpa.2020.110745

Cited by 6 publications

(4 citation statements)

References 59 publications

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“…For example, delayed mortality of juvenile Chinook salmon ( Oncorhynchus tshawytscha ) that migrated through McNary Dam, Columbia River, was 46% to 70% of total mortality (Ferguson et al, 2006). Further, indirect effects on physiology and immunity can compromise Atlantic salmon post‐smolt ability to escape to the ocean (Ammar et al, 2020). We cannot exclude potential compensatory mortality during marine migration (i.e.…”

Section: Discussionmentioning

confidence: 99%

Handling of wild Atlantic salmon smolts reduced marine survival more than hydropower turbine passage

Haraldstad

Johansen

Vollset

2023

Fisheries Management Eco

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Atlantic salmon smolts are sensitive to disturbance during their migration and negative effects experienced in freshwater may carry over into the marine environment. In this study, smolts were PIT‐tagged and detected during their subsequent spawning migration. A generalized linear model fitted to the return data predicted a return probability of 0.091 ± 0.0061 (±SE) for smolt that was released downstream of a hydropower dam. The additional effect of migrating through a Kaplan turbine associated with hydroelectric generation did not significantly reduce return rates, while the additional effect of being handled twice in a trap was significant and lowered the predicted return probability to 0.057 ± 0.0079 (±SE; model predictions from logistic regression). Catch‐mark‐recapture methods such as those using physical recapture of fish should be applied with great care to avoid multiple handling stress that may lead to reduced marine survival and biasing estimates intended to help monitor population statuses. Moreover, similar return rates in turbine and bypass migrating smolts emphasize that more knowledge is needed when evaluating mitigation actions for migratory fish at hydropower plants.

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Section: Discussionmentioning

confidence: 99%

Handling of wild Atlantic salmon smolts reduced marine survival more than hydropower turbine passage

Haraldstad

Johansen

Vollset

2023

Fisheries Management Eco

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“…As stated in the introduction, cortisol is the dominant stress hormone in the chronic stress response, whereas a combination of other stress hormones released from the HPI axis plays a bigger role alongside cortisol in an acute stress response. This sentiment was well elucidated by Ben Ammar et al [8] who performed an interesting study where they exposed Atlantic salmon ( Salmo salar ) to a 10-minute acute stressor: the process of a fish passing through a power dam. Splenic mRNA expression of lysozyme G, eosinophil peroxidase , and IgM were increased post-stress.…”

Section: Effect Of Stress Hormones On Fish Immunitymentioning

confidence: 94%

Understanding acute stress-mediated immunity in teleost fish

Guo

Dixon

2021

Fish and Shellfish Immunology Reports

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“…Firstly, the Mortality 1, mostly used during formulae development, is certainly a too optimistic way to compute fish mortality, as all uncaptured fish are considered alive. Secondly, available field studies usually report fish mortality between 0 and 48h after fish passage through the turbine and delayed mortality, occurring afterward (Ferguson et al, 2006;Algera et al, 2020;Ben Ammar et al, 2020), remains unknown. New formulae were developed using mortality tests performed on a quite wide panel of Francis turbines (Tab.…”

Section: Conclusion and Formulae Applicabilitymentioning

confidence: 99%

Updated mortality estimation formulae for salmonids passing through Francis turbines at hydropower plants

Tomanova¹,

Courret²,

Tymen³

et al. 2023

Knowl. Manag. Aquat. Ecosyst.

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Downstream migrating fish can be strongly affected by hydroelectric facilities. To set up adapted mitigation measures, it is important to identify these impacts (e.g. induced mortality rates). For Francis turbines, two mortality prediction formulas, developed in 1989 and updated in 2000, are currently used in France for salmonids according to turbine characteristics and fish size (Larinier and Dartiguelongue, 1989, updated by Bosc and Larinier, 2000). However, their use is limited when some parameters are unknown, such as turbine speed. Moreover, the updated version of can be criticized because of its unpublished development procedure and its unknown predictive power. The main purpose of this study is to update the existing formulae to meet the following objectives: (1) a transparent development procedure, (2) formulae simplification, (3) the use of simple (usually the best-known) turbine parameters, and (4) a maximization of the predictive power and an assessment of prediction errors. Based on data from 73 in situ mortality tests available in peer-reviewed and ‘grey’ literature, we developed two new formulae to estimate salmonid mortality rate in Francis turbines. The first one uses turbine peripheral speed, diameter and fish size (correlation between predicted and observed mortality rates r = 0.89, and root mean square error RMSE = 0.11). The second one is based on usually known parameters: turbine discharge, water head and fish size, to allow a broader applicability (r = 0.89, RMSE = 0.10). This study comforts the validity of previous formulae and provides two new ones allowing a satisfactory precision in the estimations.

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Passage through a hydropower plant affects the physiological and health status of Atlantic salmon smolts

Cited by 6 publications

References 59 publications

Handling of wild Atlantic salmon smolts reduced marine survival more than hydropower turbine passage

Handling of wild Atlantic salmon smolts reduced marine survival more than hydropower turbine passage

Understanding acute stress-mediated immunity in teleost fish

Updated mortality estimation formulae for salmonids passing through Francis turbines at hydropower plants

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