Does variation in egg structure among five populations of Atlantic salmon (Salmo salar) influence their survival in low oxygen conditions?
Oxygen supply to the salmonid egg surface can be limited by external factors such as sedimentation and groundwater upwelling, while the egg membrane itself can impede diffusion from the egg surface to the embryo. Therefore, the structure of egg membranes could affect the rate at which embryos obtain...
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ftdoajarticles:oai:doaj.org/article:6dcdebba13634254a9c16afbf955a99e 2023-05-15T15:30:51+02:00 Does variation in egg structure among five populations of Atlantic salmon (Salmo salar) influence their survival in low oxygen conditions? Jack Bloomer David Sear Paul Kemp 2019-01-01T00:00:00Z https://doi.org/10.1098/rsos.181020 https://doaj.org/article/6dcdebba13634254a9c16afbf955a99e EN eng The Royal Society https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.181020 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.181020 https://doaj.org/article/6dcdebba13634254a9c16afbf955a99e Royal Society Open Science, Vol 6, Iss 1 (2019) chorion permeability hypoxia adaptation tolerance Science Q article 2019 ftdoajarticles https://doi.org/10.1098/rsos.181020 2022-12-31T04:18:23Z Oxygen supply to the salmonid egg surface can be limited by external factors such as sedimentation and groundwater upwelling, while the egg membrane itself can impede diffusion from the egg surface to the embryo. Therefore, the structure of egg membranes could affect the rate at which embryos obtain oxygen from their surroundings. Published field data indicate that oxygen stress experienced by salmonid eggs can vary widely among populations. Therefore, if membrane architecture influences diffusion rate to the embryo, selection for more permeable membranes could occur in oxygen-stressed environments. Using electron microscopy, the membrane structure of eggs obtained from five UK Atlantic salmon (Salmo salar) populations is described. Membrane thickness, porosity and permeability to dissolved oxygen varied among populations. Furthermore, comparison of membranes of eggs that survived laboratory controlled low-oxygen conditions compared to those that died suggested that ova with less permeable membranes were more susceptible to hypoxia-induced mortality. In addition, membrane porosity was lower than previously reported indicating that oxygen requirements during incubation have been underestimated, so models such as the mass transfer theory that predict incubation success could currently overestimate ova survival. Variation in egg membrane structure influences low oxygen tolerance of Atlantic salmon embryos and could represent adaptation to low oxygen stress. Consequently, stock enhancement techniques such as supportive breeding that relieve incubation stress could erode structural adaptations. Article in Journal/Newspaper Atlantic salmon Salmo salar Directory of Open Access Journals: DOAJ Articles Royal Society Open Science 6 1 181020 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
chorion permeability hypoxia adaptation tolerance Science Q |
spellingShingle |
chorion permeability hypoxia adaptation tolerance Science Q Jack Bloomer David Sear Paul Kemp Does variation in egg structure among five populations of Atlantic salmon (Salmo salar) influence their survival in low oxygen conditions? |
topic_facet |
chorion permeability hypoxia adaptation tolerance Science Q |
description |
Oxygen supply to the salmonid egg surface can be limited by external factors such as sedimentation and groundwater upwelling, while the egg membrane itself can impede diffusion from the egg surface to the embryo. Therefore, the structure of egg membranes could affect the rate at which embryos obtain oxygen from their surroundings. Published field data indicate that oxygen stress experienced by salmonid eggs can vary widely among populations. Therefore, if membrane architecture influences diffusion rate to the embryo, selection for more permeable membranes could occur in oxygen-stressed environments. Using electron microscopy, the membrane structure of eggs obtained from five UK Atlantic salmon (Salmo salar) populations is described. Membrane thickness, porosity and permeability to dissolved oxygen varied among populations. Furthermore, comparison of membranes of eggs that survived laboratory controlled low-oxygen conditions compared to those that died suggested that ova with less permeable membranes were more susceptible to hypoxia-induced mortality. In addition, membrane porosity was lower than previously reported indicating that oxygen requirements during incubation have been underestimated, so models such as the mass transfer theory that predict incubation success could currently overestimate ova survival. Variation in egg membrane structure influences low oxygen tolerance of Atlantic salmon embryos and could represent adaptation to low oxygen stress. Consequently, stock enhancement techniques such as supportive breeding that relieve incubation stress could erode structural adaptations. |
format |
Article in Journal/Newspaper |
author |
Jack Bloomer David Sear Paul Kemp |
author_facet |
Jack Bloomer David Sear Paul Kemp |
author_sort |
Jack Bloomer |
title |
Does variation in egg structure among five populations of Atlantic salmon (Salmo salar) influence their survival in low oxygen conditions? |
title_short |
Does variation in egg structure among five populations of Atlantic salmon (Salmo salar) influence their survival in low oxygen conditions? |
title_full |
Does variation in egg structure among five populations of Atlantic salmon (Salmo salar) influence their survival in low oxygen conditions? |
title_fullStr |
Does variation in egg structure among five populations of Atlantic salmon (Salmo salar) influence their survival in low oxygen conditions? |
title_full_unstemmed |
Does variation in egg structure among five populations of Atlantic salmon (Salmo salar) influence their survival in low oxygen conditions? |
title_sort |
does variation in egg structure among five populations of atlantic salmon (salmo salar) influence their survival in low oxygen conditions? |
publisher |
The Royal Society |
publishDate |
2019 |
url |
https://doi.org/10.1098/rsos.181020 https://doaj.org/article/6dcdebba13634254a9c16afbf955a99e |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Royal Society Open Science, Vol 6, Iss 1 (2019) |
op_relation |
https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.181020 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.181020 https://doaj.org/article/6dcdebba13634254a9c16afbf955a99e |
op_doi |
https://doi.org/10.1098/rsos.181020 |
container_title |
Royal Society Open Science |
container_volume |
6 |
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1 |
container_start_page |
181020 |
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1766361312316620800 |