The maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in Atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule
The maternal effect of fish egg size has profound implications for oxygen transfer across the egg shell surface, and therefore metabolism, especially under adverse environmental conditions like hypoxia. We found that metabolic rate ([Formula: see text]) of Atlantic salmon alevins was higher than of...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2016
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/cjfas-2015-0358 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2015-0358 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2015-0358 |
id |
crcansciencepubl:10.1139/cjfas-2015-0358 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/cjfas-2015-0358 2024-09-30T14:32:26+00:00 The maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in Atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule Polymeropoulos, Elias. T. Elliott, Nicholas G. Frappell, Peter B. 2016 http://dx.doi.org/10.1139/cjfas-2015-0358 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2015-0358 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2015-0358 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 73, issue 8, page 1173-1181 ISSN 0706-652X 1205-7533 journal-article 2016 crcansciencepubl https://doi.org/10.1139/cjfas-2015-0358 2024-09-05T04:11:14Z The maternal effect of fish egg size has profound implications for oxygen transfer across the egg shell surface, and therefore metabolism, especially under adverse environmental conditions like hypoxia. We found that metabolic rate ([Formula: see text]) of Atlantic salmon alevins was higher than of eggs in normoxia and hypoxia. Equally, the [Formula: see text] of smaller eggs from maiden spawners was lower than that of larger eggs from repeat spawners. Critical partial pressure of oxygen (PO 2 ) for hatching was lower in eggs from repeat spawners. Generally, the PO 2 within the egg capsule was lower for a given ambient PO 2 and decreased further with hypoxia, and the internal PO 2 was higher, the bigger the volume of the egg. Therefore, we conclude that the egg capsule poses a major barrier to oxygen exchange for the mature embryo that is more severe in eggs from maiden spawners than in eggs from repeat spawners. This was corroborated by a more advantageous egg surface area to [Formula: see text] ratio in eggs from repeat spawners. These findings challenge the “bigger is worse during incubation” hypothesis. Article in Journal/Newspaper Atlantic salmon Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 73 8 1173 1181 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
The maternal effect of fish egg size has profound implications for oxygen transfer across the egg shell surface, and therefore metabolism, especially under adverse environmental conditions like hypoxia. We found that metabolic rate ([Formula: see text]) of Atlantic salmon alevins was higher than of eggs in normoxia and hypoxia. Equally, the [Formula: see text] of smaller eggs from maiden spawners was lower than that of larger eggs from repeat spawners. Critical partial pressure of oxygen (PO 2 ) for hatching was lower in eggs from repeat spawners. Generally, the PO 2 within the egg capsule was lower for a given ambient PO 2 and decreased further with hypoxia, and the internal PO 2 was higher, the bigger the volume of the egg. Therefore, we conclude that the egg capsule poses a major barrier to oxygen exchange for the mature embryo that is more severe in eggs from maiden spawners than in eggs from repeat spawners. This was corroborated by a more advantageous egg surface area to [Formula: see text] ratio in eggs from repeat spawners. These findings challenge the “bigger is worse during incubation” hypothesis. |
format |
Article in Journal/Newspaper |
author |
Polymeropoulos, Elias. T. Elliott, Nicholas G. Frappell, Peter B. |
spellingShingle |
Polymeropoulos, Elias. T. Elliott, Nicholas G. Frappell, Peter B. The maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in Atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule |
author_facet |
Polymeropoulos, Elias. T. Elliott, Nicholas G. Frappell, Peter B. |
author_sort |
Polymeropoulos, Elias. T. |
title |
The maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in Atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule |
title_short |
The maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in Atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule |
title_full |
The maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in Atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule |
title_fullStr |
The maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in Atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule |
title_full_unstemmed |
The maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in Atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule |
title_sort |
maternal effect of differences in egg size influence metabolic rate and hypoxia induced hatching in atlantic salmon eggs: implications for respiratory gas exchange across the egg capsule |
publisher |
Canadian Science Publishing |
publishDate |
2016 |
url |
http://dx.doi.org/10.1139/cjfas-2015-0358 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2015-0358 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2015-0358 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 73, issue 8, page 1173-1181 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2015-0358 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
73 |
container_issue |
8 |
container_start_page |
1173 |
op_container_end_page |
1181 |
_version_ |
1811636595116212224 |