Derivation of the Study Parameters in Field Studies for the Determination of the Site Injury Rate

Infographic on Derivation of the Study Parameters in Field Studies for the Determination of the Site Injury Rate

Ecologic Institute & IGF Jena 2020 | CC BY 4.0

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Derivation of the Study Parameters in Field Studies for the Determination of the Site Injury Rate

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Ecologic Institute 2020: Derivation of the Study Parameters in Field Studies for the Determination of the Site Injury Rate. Infographic published in: Wagner, F. and P. Warth 2020: Evaluation of primary injury to fish at hydropower sites. Methodological recommendations for quantifying the risk of injury and mortality to fish during the passage of hydropower sites. Jena: Institute of Aquatic Ecology and Fish Biology (IGF Jena).

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A planning tool for a site evaluation is available in Schmalz et al. (2015) and DWA (2021). Due to the diverse hazards to which fish are exposed during the passage of hydropower sites, not only the turbine but all downstream migration corridors must be investigated. For this reason, both corridor-specific and overall site-related assessment parameters are specified:

  • Corridor-specific injury rate
  • Corridor-specific mortality / survival rate
  • Site injury rate
  • Site-specific mortality / survival rate

These assessment parameters include various study parameters that must be determined and quantified in the field. Factors influencing the results, such as the previous injury of the fish and the study-related influences, are excluded. For the assessment parameter site injury rate, the derivation of the necessary study parameters is exemplified in the following figure. 

This illustration exemplifies the derivation of the study parameters in field studies for the determination of the site injury rate. It is part of a fact sheet on primary injury to fish at hydropower sites.

The infographic is published under a creative commons license CC BY 4.0. That means it can be copied and redistributed in any medium or format and for any purpose as long as appropriate credit to the authors (Ecologic Institute, Institute of Aquatic Ecology and Fish Biology) is given.

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German
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Media format: coloured infographic for a digital fact sheet
Copyright: CC BY 4.0
Content: Falko Wagner, Peter Warth ( Institut für Gewässerökologie & Fischereibiologie, Jena)
Graphic design: Lena Aebli (Ecologic Institute)

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Fact Sheet 03: Evaluation of primary injury to fish at hydropower sites
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Keywords
Water Framework Directive, WFD, river, nature conservation, biodiversity, energy, hydropower, fish, migration, watercourse, connectivity, restoration, hydromorphology, protection
Germany, Switzerland, Austria
infographic, visualization, illustration, creative commons, fact sheet
PublicationFact SheetEvaluation of Primary Injury to Fish at Hydropower Sites
 
Cover of the fact sheet "Evaluation of primary injury to fish at hydropower sites"

© German Participatory Forum on Fish Protection & Downstream Migration

This Fact Sheet provides methodological recommendations for quantifying the risk of harm and mortality to fish during passage from hydropower sites. The fact sheet "Evaluation of primary injury to fish at hydropower sites" is available for download. The key messages... Read more

Wagner, Falko and Peter Warth 2020: Evaluation of primary injury to fish at hydropower sites. Methodological recommendations for quantifying the risk of injury and mortality to fish during the passage of hydropower sites. Jena: Institute of Aquatic Ecology and Fish Biology (IGF Jena).

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Ecologic Institute & IGF Jena 2020 | CC BY 4.0

Passage-related injuries can be determined for a group of fish or for the individual fish on the basis of the documented previous injuries. Depending on which approach is chosen, the results of the study may differ. In the group approach, the proportion of injured... Read more

Ecologic Institute 2020: group and individual approach to quantifying passage-related injuries at a hydropower site. Infographic published in: Wagner, F. and P. Warth 2020: Evaluation of primary injury to fish at hydropower sites. Methodological recommendations for quantifying the risk of injury and mortality to fish during the passage of hydropower sites. Jena: Institute of Aquatic Ecology and Fish Biology (IGF Jena).

PublicationInfographicComparison of the Injuries of a Common Nase Before and After the Passage of a Hydropower Site
 
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Ecologic Institute & IGF Jena 2020 | CC BY 4.0

In studies investigating the risk of injury and mortality of fish during the passage of hydropower sites, the animals are inevitably caught and handled at least once. Injuries to the fish cannot be ruled out in this process. It is therefore imperative that they are... Read more

Ecologic Institute 2020: Comparison of the injuries of a common Nase before and after the passage of a hydropower site. Infographic published in: Wagner, F. and P. Warth 2020: Evaluation of primary injury to fish at hydropower sites. Methodological recommendations for quantifying the risk of injury and mortality to fish during the passage of hydropower sites. Jena: Institute of Aquatic Ecology and Fish Biology (IGF Jena).

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Ecologic Institute & IGF Jena 2020 | CC BY 4.0

When planning the studies, the fundamental question arises as to whether naturally downstream migrating fish or introduced experimental fish should be used, and thus whether an experimental approach is required. Both approaches have their advantages and disadvantages. ... Read more

Ecologic Institute 2020: Advantages and disadvantages of using naturally downstream migrating fish or an experimental approach to determine the mortality and injury risk. Infographic published in: Wagner, F. and P. Warth 2020: Evaluation of primary injury to fish at hydropower sites. Jena: Institute of Aquatic Ecology and Fish Biology (IGF Jena).