Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish
1. Single fast fibres were isolated from the myotomal muscles of icefish (Chaenocephalus aceratus Lönnberg, Antarctica), North Sea Cod (Gadus morhua L.) and Pacific Blue Marlin (Makaira nigricans Wakiya, Hawaii). Fibres were chemically skinned with the non-ionic detergent Brij-58. 2. Maximum tension...
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1985
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ftnerc:oai:nora.nerc.ac.uk:523392 2023-05-15T13:41:43+02:00 Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish Johnston, I.A. Altringham, J.D. 1985 http://nora.nerc.ac.uk/id/eprint/523392/ https://doi.org/10.1007/BF00584534 unknown Springer Johnston, I.A.; Altringham, J.D. 1985 Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish. Pfl�gers Archiv European Journal of Physiology, 405 (2). 136-140. https://doi.org/10.1007/BF00584534 <https://doi.org/10.1007/BF00584534> Biology and Microbiology Publication - Article PeerReviewed 1985 ftnerc https://doi.org/10.1007/BF00584534 2023-02-04T19:48:22Z 1. Single fast fibres were isolated from the myotomal muscles of icefish (Chaenocephalus aceratus Lönnberg, Antarctica), North Sea Cod (Gadus morhua L.) and Pacific Blue Marlin (Makaira nigricans Wakiya, Hawaii). Fibres were chemically skinned with the non-ionic detergent Brij-58. 2. Maximum tensions (Po, kN m−2) developed at the characteristic body temperature of each species are 231 for icefish (−1°C), 187 for cod (8°C) and 156 for marlin (20°C). At 0°CPo is 7 times higher for fibres from the icefish than from the marlin. 3. Fibres from icefish and cod failed to relax completely following activations at temperatures above approximately 12°C. The resultant post-contraction force is associated with a proportional increase in stiffness, suggesting the formation of a population of Ca-insensitive cross bridges. 4. At 0°C there is little interspecific variation in unloaded contraction velocity (Vmax) among the three species.Vmax (muscle lengths s−1) at normal body temperatures are 0.9 for icefish (−1°C), 1.0 for cod (8°C) and 3.4 for marlin (20°C). 5. The force-velocity (P-V) relationship becomes progressively more curved with increasing temperature for all three species. 6. Maximum power output for the fast muscle fibres from the Antarctic species at −1°C is around 60% of that of the tropical fish at 20°C. Evolutionary temperature compensation of muscle power output appears largely to involve differences in the ability of cross bridges to generate force. Article in Journal/Newspaper Antarc* Antarctic Antarctica Gadus morhua Icefish Natural Environment Research Council: NERC Open Research Archive Antarctic Pacific The Antarctic Pfl�gers Archiv European Journal of Physiology 405 2 136 140 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Biology and Microbiology |
spellingShingle |
Biology and Microbiology Johnston, I.A. Altringham, J.D. Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish |
topic_facet |
Biology and Microbiology |
description |
1. Single fast fibres were isolated from the myotomal muscles of icefish (Chaenocephalus aceratus Lönnberg, Antarctica), North Sea Cod (Gadus morhua L.) and Pacific Blue Marlin (Makaira nigricans Wakiya, Hawaii). Fibres were chemically skinned with the non-ionic detergent Brij-58. 2. Maximum tensions (Po, kN m−2) developed at the characteristic body temperature of each species are 231 for icefish (−1°C), 187 for cod (8°C) and 156 for marlin (20°C). At 0°CPo is 7 times higher for fibres from the icefish than from the marlin. 3. Fibres from icefish and cod failed to relax completely following activations at temperatures above approximately 12°C. The resultant post-contraction force is associated with a proportional increase in stiffness, suggesting the formation of a population of Ca-insensitive cross bridges. 4. At 0°C there is little interspecific variation in unloaded contraction velocity (Vmax) among the three species.Vmax (muscle lengths s−1) at normal body temperatures are 0.9 for icefish (−1°C), 1.0 for cod (8°C) and 3.4 for marlin (20°C). 5. The force-velocity (P-V) relationship becomes progressively more curved with increasing temperature for all three species. 6. Maximum power output for the fast muscle fibres from the Antarctic species at −1°C is around 60% of that of the tropical fish at 20°C. Evolutionary temperature compensation of muscle power output appears largely to involve differences in the ability of cross bridges to generate force. |
format |
Article in Journal/Newspaper |
author |
Johnston, I.A. Altringham, J.D. |
author_facet |
Johnston, I.A. Altringham, J.D. |
author_sort |
Johnston, I.A. |
title |
Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish |
title_short |
Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish |
title_full |
Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish |
title_fullStr |
Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish |
title_full_unstemmed |
Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish |
title_sort |
evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish |
publisher |
Springer |
publishDate |
1985 |
url |
http://nora.nerc.ac.uk/id/eprint/523392/ https://doi.org/10.1007/BF00584534 |
geographic |
Antarctic Pacific The Antarctic |
geographic_facet |
Antarctic Pacific The Antarctic |
genre |
Antarc* Antarctic Antarctica Gadus morhua Icefish |
genre_facet |
Antarc* Antarctic Antarctica Gadus morhua Icefish |
op_relation |
Johnston, I.A.; Altringham, J.D. 1985 Evolutionary adaptation of muscle power output to environmental temperature: force-velocity characteristics of skinned fibres isolated from antarctic, temperate and tropical marine fish. Pfl�gers Archiv European Journal of Physiology, 405 (2). 136-140. https://doi.org/10.1007/BF00584534 <https://doi.org/10.1007/BF00584534> |
op_doi |
https://doi.org/10.1007/BF00584534 |
container_title |
Pfl�gers Archiv European Journal of Physiology |
container_volume |
405 |
container_issue |
2 |
container_start_page |
136 |
op_container_end_page |
140 |
_version_ |
1766154943546261504 |