The influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos
Abstract Embryos of many valued salmonid species incubate in the hyporheic zone of boreal streams over winter. Influence of individual winter‐related environmental variables on salmonid embryo success has been previously investigated. However, how multiple variables act together to influence embryo...
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crwiley:10.1111/fwb.13280 2024-06-02T08:03:43+00:00 The influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos Lavery, J. Michelle Cunjak, Richard A. Natural Sciences and Engineering Research Council of Canada 2019 http://dx.doi.org/10.1111/fwb.13280 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fwb.13280 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fwb.13280 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 64, issue 6, page 1098-1113 ISSN 0046-5070 1365-2427 journal-article 2019 crwiley https://doi.org/10.1111/fwb.13280 2024-05-03T11:16:46Z Abstract Embryos of many valued salmonid species incubate in the hyporheic zone of boreal streams over winter. Influence of individual winter‐related environmental variables on salmonid embryo success has been previously investigated. However, how multiple variables act together to influence embryo incubation remains poorly understood. Using a naturally spawning population of Atlantic salmon ( Salmo salar ) in the Miramichi River basin (New Brunswick, Canada), we related variation in the abiotic embryo incubation habitat in different streams (spatial) and over the course of two winters (temporal) to embryo mortality between fertilisation and hatch. Over two years (2013–2014 and 2014–2015), we introduced fertilised eggs to six simulated salmon redds in each of three riffles in each of five active spawning reaches ( n redds = 90) with a range of hyporheic conditions. Embryo mortality was quantified at an early sampling event (March; pre‐freshet and during late embryonic development) and a late sampling event (May; post‐freshet and post‐hatch). We extracted 22 abiotic predictor variables for statistical analyses from continuous records of hyporheic environmental conditions, collected for the duration of the incubation period in each study reach. Through partial least squares regression analyses, 37.6% of the total variation in mortality was explained by the predictor variables. Each group of predictor variables explained similar proportions of variation (water temperature: 8.4%, water level: 7.4%, dissolved oxygen: 7.1%, ice conditions: 7.2%, and substrate characteristics: 7.5%), which suggests that mortality is influenced by multiple interacting abiotic conditions, rather than a single variable in isolation, and that the factors contributing to ideal salmonid incubation habitats are complex and interconnected. Our research highlights the value of a multi‐faceted research perspective and provides a baseline from which future changes in threatened salmonid populations can be measured and compared in an effort to ... Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Canada Freshwater Biology 64 6 1098 1113 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Embryos of many valued salmonid species incubate in the hyporheic zone of boreal streams over winter. Influence of individual winter‐related environmental variables on salmonid embryo success has been previously investigated. However, how multiple variables act together to influence embryo incubation remains poorly understood. Using a naturally spawning population of Atlantic salmon ( Salmo salar ) in the Miramichi River basin (New Brunswick, Canada), we related variation in the abiotic embryo incubation habitat in different streams (spatial) and over the course of two winters (temporal) to embryo mortality between fertilisation and hatch. Over two years (2013–2014 and 2014–2015), we introduced fertilised eggs to six simulated salmon redds in each of three riffles in each of five active spawning reaches ( n redds = 90) with a range of hyporheic conditions. Embryo mortality was quantified at an early sampling event (March; pre‐freshet and during late embryonic development) and a late sampling event (May; post‐freshet and post‐hatch). We extracted 22 abiotic predictor variables for statistical analyses from continuous records of hyporheic environmental conditions, collected for the duration of the incubation period in each study reach. Through partial least squares regression analyses, 37.6% of the total variation in mortality was explained by the predictor variables. Each group of predictor variables explained similar proportions of variation (water temperature: 8.4%, water level: 7.4%, dissolved oxygen: 7.1%, ice conditions: 7.2%, and substrate characteristics: 7.5%), which suggests that mortality is influenced by multiple interacting abiotic conditions, rather than a single variable in isolation, and that the factors contributing to ideal salmonid incubation habitats are complex and interconnected. Our research highlights the value of a multi‐faceted research perspective and provides a baseline from which future changes in threatened salmonid populations can be measured and compared in an effort to ... |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Lavery, J. Michelle Cunjak, Richard A. |
spellingShingle |
Lavery, J. Michelle Cunjak, Richard A. The influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos |
author_facet |
Lavery, J. Michelle Cunjak, Richard A. |
author_sort |
Lavery, J. Michelle |
title |
The influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos |
title_short |
The influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos |
title_full |
The influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos |
title_fullStr |
The influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos |
title_full_unstemmed |
The influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos |
title_sort |
influence of abiotic incubation conditions on the winter mortality of wild salmonid embryos |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/fwb.13280 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fwb.13280 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fwb.13280 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Freshwater Biology volume 64, issue 6, page 1098-1113 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/fwb.13280 |
container_title |
Freshwater Biology |
container_volume |
64 |
container_issue |
6 |
container_start_page |
1098 |
op_container_end_page |
1113 |
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1800748320217366528 |