HYPOXIC RESPONSES IN A FISH FROM A STABLE ENVIRONMENT: BLOOD OXYGEN TRANSPORT IN THE
The effects of hypoxic exposure on whole-blood oxygen-affinity were examined in the antarctic fish Pagothenia borchgrevinki. Fish exposed to PQJ = 60 mmHg for 11-14 days at-1-5°C had a P50 value of 20-6 ±4-8mmHg (S.D., TV =13) at pH8-16, compared with 31-1 ±4-3mmHg (N = 10) at pH8-00 for normoxic fi...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.524.1519 2023-05-15T13:59:34+02:00 HYPOXIC RESPONSES IN A FISH FROM A STABLE ENVIRONMENT: BLOOD OXYGEN TRANSPORT IN THE Antarctic Fish Pagothenia Borchgrevinki R. M. G. Wells G. C. Grigg L. A. Beard G. Summers The Pennsylvania State University CiteSeerX Archives 1988 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.524.1519 http://jeb.biologists.org/content/141/1/97.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.524.1519 http://jeb.biologists.org/content/141/1/97.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://jeb.biologists.org/content/141/1/97.full.pdf Key words antarctic fish hypoxia blood ATP text 1988 ftciteseerx 2016-01-08T10:16:38Z The effects of hypoxic exposure on whole-blood oxygen-affinity were examined in the antarctic fish Pagothenia borchgrevinki. Fish exposed to PQJ = 60 mmHg for 11-14 days at-1-5°C had a P50 value of 20-6 ±4-8mmHg (S.D., TV =13) at pH8-16, compared with 31-1 ±4-3mmHg (N = 10) at pH8-00 for normoxic fish. Exposure to low oxygen levels resulted in a significant (66 %) rise in haemoglobin concentration, and erythrocyte [ATP] decreased by approximately 27%. There was no evidence for erythrocyte swelling. An aberrant gill morphology was observed in six fish and these showed unexpectedly high erythrocyte ATP levels. Oxygen-carrying capacity increased by approximately 40 % in hypoxic fish and was correlated with a 34 % decrease in spleen mass. Despite the fact that antarctic fish have exceptionally low demands for oxygen and are unlikely ever to encounter environmental hypoxia, this antarctic fish has the necessary machinery to respond to hypoxia in a way that is typical of teleosts that naturally inhabit oxylabile environments. The ability to make short-term adaptive changes in the O2 delivery system in response to hypoxic exposure may be typical for vertebrates in general, rather than a feature seen only in those organisms which encounter environmental hypoxia on a regular basis. Text Antarc* Antarctic Unknown Antarctic The Antarctic |
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English |
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Key words antarctic fish hypoxia blood ATP |
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Key words antarctic fish hypoxia blood ATP Antarctic Fish Pagothenia Borchgrevinki R. M. G. Wells G. C. Grigg L. A. Beard G. Summers HYPOXIC RESPONSES IN A FISH FROM A STABLE ENVIRONMENT: BLOOD OXYGEN TRANSPORT IN THE |
topic_facet |
Key words antarctic fish hypoxia blood ATP |
description |
The effects of hypoxic exposure on whole-blood oxygen-affinity were examined in the antarctic fish Pagothenia borchgrevinki. Fish exposed to PQJ = 60 mmHg for 11-14 days at-1-5°C had a P50 value of 20-6 ±4-8mmHg (S.D., TV =13) at pH8-16, compared with 31-1 ±4-3mmHg (N = 10) at pH8-00 for normoxic fish. Exposure to low oxygen levels resulted in a significant (66 %) rise in haemoglobin concentration, and erythrocyte [ATP] decreased by approximately 27%. There was no evidence for erythrocyte swelling. An aberrant gill morphology was observed in six fish and these showed unexpectedly high erythrocyte ATP levels. Oxygen-carrying capacity increased by approximately 40 % in hypoxic fish and was correlated with a 34 % decrease in spleen mass. Despite the fact that antarctic fish have exceptionally low demands for oxygen and are unlikely ever to encounter environmental hypoxia, this antarctic fish has the necessary machinery to respond to hypoxia in a way that is typical of teleosts that naturally inhabit oxylabile environments. The ability to make short-term adaptive changes in the O2 delivery system in response to hypoxic exposure may be typical for vertebrates in general, rather than a feature seen only in those organisms which encounter environmental hypoxia on a regular basis. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Antarctic Fish Pagothenia Borchgrevinki R. M. G. Wells G. C. Grigg L. A. Beard G. Summers |
author_facet |
Antarctic Fish Pagothenia Borchgrevinki R. M. G. Wells G. C. Grigg L. A. Beard G. Summers |
author_sort |
Antarctic Fish |
title |
HYPOXIC RESPONSES IN A FISH FROM A STABLE ENVIRONMENT: BLOOD OXYGEN TRANSPORT IN THE |
title_short |
HYPOXIC RESPONSES IN A FISH FROM A STABLE ENVIRONMENT: BLOOD OXYGEN TRANSPORT IN THE |
title_full |
HYPOXIC RESPONSES IN A FISH FROM A STABLE ENVIRONMENT: BLOOD OXYGEN TRANSPORT IN THE |
title_fullStr |
HYPOXIC RESPONSES IN A FISH FROM A STABLE ENVIRONMENT: BLOOD OXYGEN TRANSPORT IN THE |
title_full_unstemmed |
HYPOXIC RESPONSES IN A FISH FROM A STABLE ENVIRONMENT: BLOOD OXYGEN TRANSPORT IN THE |
title_sort |
hypoxic responses in a fish from a stable environment: blood oxygen transport in the |
publishDate |
1988 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.524.1519 http://jeb.biologists.org/content/141/1/97.full.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://jeb.biologists.org/content/141/1/97.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.524.1519 http://jeb.biologists.org/content/141/1/97.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766268181915107328 |