Peripheral oxygen transport in skeletal muscle of Antarctic and sub-Antarctic notothenioid fish.
Contains fulltext : 185443.pdf (Publisher’s version ) (Open Access) Transcellular oxygen flux was modelled mathematically in the aerobic skeletal muscles of perciform fish species living at widely different temperatures (Antarctica, sub-Antarctica and the Mediterranean Sea). Using structural data de...
Published in: | Journal of Experimental Biology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2002
|
Subjects: | |
Online Access: | http://hdl.handle.net/2066/185443 https://repository.ubn.ru.nl//bitstream/handle/2066/185443/185443.pdf https://doi.org/10.1242/jeb.205.6.769 |
id |
ftunivnijmegen:oai:repository.ubn.ru.nl:2066/185443 |
---|---|
record_format |
openpolar |
spelling |
ftunivnijmegen:oai:repository.ubn.ru.nl:2066/185443 2023-05-15T13:36:31+02:00 Peripheral oxygen transport in skeletal muscle of Antarctic and sub-Antarctic notothenioid fish. Egginton, S. Skilbeck, C. Hoofd, L.J.C. Calvo, J. Johnston, I.A. 2002 http://hdl.handle.net/2066/185443 https://repository.ubn.ru.nl//bitstream/handle/2066/185443/185443.pdf https://doi.org/10.1242/jeb.205.6.769 unknown https://repository.ubn.ru.nl//bitstream/handle/2066/185443/185443.pdf http://hdl.handle.net/2066/185443 https://doi.org/10.1242/jeb.205.6.769 Journal of Experimental Biology, 205, 6, pp. 769-779 Bloodpressure regulation tissue oxygenation and exercise Bloeddrukregulatie weefseloxygenatie en inspanning Article / Letter to editor 2002 ftunivnijmegen https://doi.org/10.1242/jeb.205.6.769 2022-09-29T05:56:25Z Contains fulltext : 185443.pdf (Publisher’s version ) (Open Access) Transcellular oxygen flux was modelled mathematically in the aerobic skeletal muscles of perciform fish species living at widely different temperatures (Antarctica, sub-Antarctica and the Mediterranean Sea). Using structural data derived from stereological analysis of electron micrographs, mean fibre P(O(2)) was calculated on the basis of temperature-corrected rates of mitochondrial respiration and oxygen diffusion. The mean muscle fibre diameter (MFD) among Antarctic notothenioids was in the range 17-61 microm and mitochondrial volume density, Vv(mit,f), was 0.27-0.53, but capillary-to-fibre ratio varied only between 1.2 and 1.5. For a mean capillary P(O(2)) of 6 kPa, the model predicted a mean tissue P(O(2)) in the range 0.7-5.8 kPa at the estimated maximum aerobic capacity (M(O(2)max)). The lowest levels of tissue oxygenation were found in the pectoral muscle fibres of the icefish Chaenocephalus aceratus, which lacks the respiratory pigments haemoglobin and myoglobin. Red-blooded notothenioids found in the sub-Antarctic had a similar muscle fine structure to those caught south of the Antarctic Convergence, with an MFD of 20-41 microm and Vv(mit,f) of 0.27-0.33, resulting in an estimated mean P(O(2)) of 4-5 kPa at M(O(2)max). Mean tissue P(O(2)) in the sub-Antarctic icefish Champsocephalus esox, with greater MFD and Vv(mit,f), 56 microm and 0.51, respectively, was calculated to exceed 1 kPa at winter temperatures (4 degrees C), although oxidative metabolism was predicted to be impaired at the summer maximum of 10 degrees C. At the high end of the thermal range, related perciform species from the Mediterranean had a negligible drop in intracellular P(O(2)) across their small-diameter fibres, to a minimum of 5.4 kPa, comparable with that predicted for Trematomus newnesi from the Antarctic (5.6 kPa) with a similar MFD. These data suggest that, within a single phylogenetic group, integrative structural adaptations potentially enable a similar ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Icefish Radboud University: DSpace Antarctic The Antarctic Journal of Experimental Biology 205 6 769 779 |
institution |
Open Polar |
collection |
Radboud University: DSpace |
op_collection_id |
ftunivnijmegen |
language |
unknown |
topic |
Bloodpressure regulation tissue oxygenation and exercise Bloeddrukregulatie weefseloxygenatie en inspanning |
spellingShingle |
Bloodpressure regulation tissue oxygenation and exercise Bloeddrukregulatie weefseloxygenatie en inspanning Egginton, S. Skilbeck, C. Hoofd, L.J.C. Calvo, J. Johnston, I.A. Peripheral oxygen transport in skeletal muscle of Antarctic and sub-Antarctic notothenioid fish. |
topic_facet |
Bloodpressure regulation tissue oxygenation and exercise Bloeddrukregulatie weefseloxygenatie en inspanning |
description |
Contains fulltext : 185443.pdf (Publisher’s version ) (Open Access) Transcellular oxygen flux was modelled mathematically in the aerobic skeletal muscles of perciform fish species living at widely different temperatures (Antarctica, sub-Antarctica and the Mediterranean Sea). Using structural data derived from stereological analysis of electron micrographs, mean fibre P(O(2)) was calculated on the basis of temperature-corrected rates of mitochondrial respiration and oxygen diffusion. The mean muscle fibre diameter (MFD) among Antarctic notothenioids was in the range 17-61 microm and mitochondrial volume density, Vv(mit,f), was 0.27-0.53, but capillary-to-fibre ratio varied only between 1.2 and 1.5. For a mean capillary P(O(2)) of 6 kPa, the model predicted a mean tissue P(O(2)) in the range 0.7-5.8 kPa at the estimated maximum aerobic capacity (M(O(2)max)). The lowest levels of tissue oxygenation were found in the pectoral muscle fibres of the icefish Chaenocephalus aceratus, which lacks the respiratory pigments haemoglobin and myoglobin. Red-blooded notothenioids found in the sub-Antarctic had a similar muscle fine structure to those caught south of the Antarctic Convergence, with an MFD of 20-41 microm and Vv(mit,f) of 0.27-0.33, resulting in an estimated mean P(O(2)) of 4-5 kPa at M(O(2)max). Mean tissue P(O(2)) in the sub-Antarctic icefish Champsocephalus esox, with greater MFD and Vv(mit,f), 56 microm and 0.51, respectively, was calculated to exceed 1 kPa at winter temperatures (4 degrees C), although oxidative metabolism was predicted to be impaired at the summer maximum of 10 degrees C. At the high end of the thermal range, related perciform species from the Mediterranean had a negligible drop in intracellular P(O(2)) across their small-diameter fibres, to a minimum of 5.4 kPa, comparable with that predicted for Trematomus newnesi from the Antarctic (5.6 kPa) with a similar MFD. These data suggest that, within a single phylogenetic group, integrative structural adaptations potentially enable a similar ... |
format |
Article in Journal/Newspaper |
author |
Egginton, S. Skilbeck, C. Hoofd, L.J.C. Calvo, J. Johnston, I.A. |
author_facet |
Egginton, S. Skilbeck, C. Hoofd, L.J.C. Calvo, J. Johnston, I.A. |
author_sort |
Egginton, S. |
title |
Peripheral oxygen transport in skeletal muscle of Antarctic and sub-Antarctic notothenioid fish. |
title_short |
Peripheral oxygen transport in skeletal muscle of Antarctic and sub-Antarctic notothenioid fish. |
title_full |
Peripheral oxygen transport in skeletal muscle of Antarctic and sub-Antarctic notothenioid fish. |
title_fullStr |
Peripheral oxygen transport in skeletal muscle of Antarctic and sub-Antarctic notothenioid fish. |
title_full_unstemmed |
Peripheral oxygen transport in skeletal muscle of Antarctic and sub-Antarctic notothenioid fish. |
title_sort |
peripheral oxygen transport in skeletal muscle of antarctic and sub-antarctic notothenioid fish. |
publishDate |
2002 |
url |
http://hdl.handle.net/2066/185443 https://repository.ubn.ru.nl//bitstream/handle/2066/185443/185443.pdf https://doi.org/10.1242/jeb.205.6.769 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Icefish |
genre_facet |
Antarc* Antarctic Antarctica Icefish |
op_source |
Journal of Experimental Biology, 205, 6, pp. 769-779 |
op_relation |
https://repository.ubn.ru.nl//bitstream/handle/2066/185443/185443.pdf http://hdl.handle.net/2066/185443 https://doi.org/10.1242/jeb.205.6.769 |
op_doi |
https://doi.org/10.1242/jeb.205.6.769 |
container_title |
Journal of Experimental Biology |
container_volume |
205 |
container_issue |
6 |
container_start_page |
769 |
op_container_end_page |
779 |
_version_ |
1766079690422878208 |