Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results
The antioxidant defences in aerobic organisms represent the detoxification pathway against toxicity of reactive oxygen species (ROS). These highly reactive molecules are normally produced during the 4-electrons reduction of molecular oxygen to water coupled with oxidative phosphorylation and during...
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Commission for the Conservation of Antarctic Marine Living Resources
1999
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ftunivsiena:oai:usiena-air.unisi.it:11365/49338 2024-01-28T10:00:40+01:00 Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results CORSOLINI, SIMONETTA Regoli F. OLMASTRONI, SILVIA Nigro M. FOCARDI, SILVANO ETTORE Working Group on Ecosystem Monitoring and Management WG-EMM Corsolini, Simonetta Regoli, F. Olmastroni, Silvia Nigro, M. Focardi, SILVANO ETTORE 1999 STAMPA http://hdl.handle.net/11365/49338 https://www.ccamlr.org/en/wg-emm-99/59 eng eng Commission for the Conservation of Antarctic Marine Living Resources country:AUS place:Hobart, Tasmania ispartofbook:Meeting Report of the Working Group on Environmental Monitoring and Management of the Commission for the Conservation of Antarctic Marine Living Resources WG-EMM-99 volume:WG-EMM-99 firstpage:8 lastpage:10 numberofpages:3 http://hdl.handle.net/11365/49338 https://www.ccamlr.org/en/wg-emm-99/59 info:eu-repo/semantics/other 1999 ftunivsiena 2024-01-02T23:21:55Z The antioxidant defences in aerobic organisms represent the detoxification pathway against toxicity of reactive oxygen species (ROS). These highly reactive molecules are normally produced during the 4-electrons reduction of molecular oxygen to water coupled with oxidative phosphorylation and during the activity of several enzymatic systems which produce ROS as intermediates. If the antioxidant capacity is exceeded (i.e. as a consequence of enhanced intracellular formation of ROS) a pathological condition, generally termed as oxidative stress, may arise. In this preliminary work, susceptibility to oxidative stress has been compared in Adélie penguin (Pygoscelis adeliae) and South polar skua (Catharacta maccormicki), breeding at Edmonson Point (Wood Bay, Ross Sea). At the time of sampling, Adélie penguins were rearing chicks and also for skuas, the redation of eggs and chicks make this period of their biological cycle very stressful. In the framework of the Italian Research Program in Antarctica (PNRA) , blood samples were collected during the Austral summer 1998-99 and the Total Oxyradical Scavenging Capacity (TOSC) analyzed. The TOSC assay, measuring the capability of biological samples to neutralise different oxyradicals, has been recently standardized to provide a quantifiable value of biological resistance to toxicity of ROS. Penguins exhibited higher scavenging capacity towards peroxyl radicals than South polar skua. The greater resistance to toxicity of oxyradicals might suggest that penguins are naturally exposed to an higher basal prooxidant pressure in comparison to skuas. Other/Unknown Material Antarc* Antarctic Antarctica Catharacta maccormicki Pygoscelis adeliae Ross Sea Università degli Studi di Siena: USiena air Antarctic Austral Ross Sea Edmonson Point ENVELOPE(165.133,165.133,-74.333,-74.333) Wood Bay ENVELOPE(165.500,165.500,-74.217,-74.217) |
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Open Polar |
collection |
Università degli Studi di Siena: USiena air |
op_collection_id |
ftunivsiena |
language |
English |
description |
The antioxidant defences in aerobic organisms represent the detoxification pathway against toxicity of reactive oxygen species (ROS). These highly reactive molecules are normally produced during the 4-electrons reduction of molecular oxygen to water coupled with oxidative phosphorylation and during the activity of several enzymatic systems which produce ROS as intermediates. If the antioxidant capacity is exceeded (i.e. as a consequence of enhanced intracellular formation of ROS) a pathological condition, generally termed as oxidative stress, may arise. In this preliminary work, susceptibility to oxidative stress has been compared in Adélie penguin (Pygoscelis adeliae) and South polar skua (Catharacta maccormicki), breeding at Edmonson Point (Wood Bay, Ross Sea). At the time of sampling, Adélie penguins were rearing chicks and also for skuas, the redation of eggs and chicks make this period of their biological cycle very stressful. In the framework of the Italian Research Program in Antarctica (PNRA) , blood samples were collected during the Austral summer 1998-99 and the Total Oxyradical Scavenging Capacity (TOSC) analyzed. The TOSC assay, measuring the capability of biological samples to neutralise different oxyradicals, has been recently standardized to provide a quantifiable value of biological resistance to toxicity of ROS. Penguins exhibited higher scavenging capacity towards peroxyl radicals than South polar skua. The greater resistance to toxicity of oxyradicals might suggest that penguins are naturally exposed to an higher basal prooxidant pressure in comparison to skuas. |
author2 |
Working Group on Ecosystem Monitoring and Management WG-EMM Corsolini, Simonetta Regoli, F. Olmastroni, Silvia Nigro, M. Focardi, SILVANO ETTORE |
format |
Other/Unknown Material |
author |
CORSOLINI, SIMONETTA Regoli F. OLMASTRONI, SILVIA Nigro M. FOCARDI, SILVANO ETTORE |
spellingShingle |
CORSOLINI, SIMONETTA Regoli F. OLMASTRONI, SILVIA Nigro M. FOCARDI, SILVANO ETTORE Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results |
author_facet |
CORSOLINI, SIMONETTA Regoli F. OLMASTRONI, SILVIA Nigro M. FOCARDI, SILVANO ETTORE |
author_sort |
CORSOLINI, SIMONETTA |
title |
Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results |
title_short |
Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results |
title_full |
Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results |
title_fullStr |
Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results |
title_full_unstemmed |
Susceptibility to oxidative stress in different species of Antarctic birds: preliminary results |
title_sort |
susceptibility to oxidative stress in different species of antarctic birds: preliminary results |
publisher |
Commission for the Conservation of Antarctic Marine Living Resources |
publishDate |
1999 |
url |
http://hdl.handle.net/11365/49338 https://www.ccamlr.org/en/wg-emm-99/59 |
long_lat |
ENVELOPE(165.133,165.133,-74.333,-74.333) ENVELOPE(165.500,165.500,-74.217,-74.217) |
geographic |
Antarctic Austral Ross Sea Edmonson Point Wood Bay |
geographic_facet |
Antarctic Austral Ross Sea Edmonson Point Wood Bay |
genre |
Antarc* Antarctic Antarctica Catharacta maccormicki Pygoscelis adeliae Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Catharacta maccormicki Pygoscelis adeliae Ross Sea |
op_relation |
ispartofbook:Meeting Report of the Working Group on Environmental Monitoring and Management of the Commission for the Conservation of Antarctic Marine Living Resources WG-EMM-99 volume:WG-EMM-99 firstpage:8 lastpage:10 numberofpages:3 http://hdl.handle.net/11365/49338 https://www.ccamlr.org/en/wg-emm-99/59 |
_version_ |
1789325162090332160 |