Polar marine bivalves stay younger than their North Sea relatives

Age determinations of polar marine ectotherms using carbon isotope ratios and seasonal growth bands of hard structures, fish otholids or bivalve shells, indicate some polar species to live longer than their temperate relatives. Here we examined physiological ageing parameters in mantle tissue of dif...

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Main Authors: Philipp, Eva, Abele, Doris, Pörtner, Hans-Otto
Format: Conference Object
Language:unknown
Published: 2004
Subjects:
Online Access:https://epic.awi.de/id/eprint/10645/
https://hdl.handle.net/10013/epic.21116
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spelling ftawi:oai:epic.awi.de:10645 2023-09-05T13:14:03+02:00 Polar marine bivalves stay younger than their North Sea relatives Philipp, Eva Abele, Doris Pörtner, Hans-Otto 2004 https://epic.awi.de/id/eprint/10645/ https://hdl.handle.net/10013/epic.21116 unknown Philipp, E. , Abele, D. orcid:0000-0002-5766-5017 and Pörtner, H. O. orcid:0000-0001-6535-6575 (2004) Polar marine bivalves stay younger than their North Sea relatives , 12th Biennial Meeting of the Society for Free Radical Research, SFRR 2004, Buenos Aires. . hdl:10013/epic.21116 EPIC312th Biennial Meeting of the Society for Free Radical Research, SFRR 2004, Buenos Aires. Conference notRev 2004 ftawi 2023-08-22T19:48:50Z Age determinations of polar marine ectotherms using carbon isotope ratios and seasonal growth bands of hard structures, fish otholids or bivalve shells, indicate some polar species to live longer than their temperate relatives. Here we examined physiological ageing parameters in mantle tissue of different sized animals from two species of the same ecotype but with different maximum life spans (MLSP), the polar mud clam Laternula elliptica (MLSP: 36years) from the Antarctic Peninsula (King George Island) and the temperate mud clam Mya arenaria (MLSP: 10-12 years) from the North Sea, to characterize the physiological ageing process as a possible explanation for higher longevity in polar animals.We found lower mitochondrial oxidative capacity (nmol O2/ mg prot), energetic coupling and membrane potential and a higher % fraction of proton leak in older age clams of both species. Changes were more apparent in the temperate than the polar clam. In vitro H2O2 generation of succinate respiring mitochondria was 2 to 10-fold higher in the temperate compared to the polar clam and increased significantly with ageing. Antioxidant capacities were higher in the polar clam.Mitochondria of temperate mud clams show a pronounced loss of functioning, accelerated ROS release and their cellular redox milieu became more oxidized with ageing. Polar mud clams preserve cellular redox potential and mitochondrial functioning better in aged specimens and limit the production of mitochondrial ROS to lower levels. Together with a well developed AOX system, this may enable these animals to reach older ages than their temperate relatives. Conference Object Antarc* Antarctic Antarctic Peninsula King George Island Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Antarctic Peninsula King George Island The Antarctic
institution Open Polar
collection Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
op_collection_id ftawi
language unknown
description Age determinations of polar marine ectotherms using carbon isotope ratios and seasonal growth bands of hard structures, fish otholids or bivalve shells, indicate some polar species to live longer than their temperate relatives. Here we examined physiological ageing parameters in mantle tissue of different sized animals from two species of the same ecotype but with different maximum life spans (MLSP), the polar mud clam Laternula elliptica (MLSP: 36years) from the Antarctic Peninsula (King George Island) and the temperate mud clam Mya arenaria (MLSP: 10-12 years) from the North Sea, to characterize the physiological ageing process as a possible explanation for higher longevity in polar animals.We found lower mitochondrial oxidative capacity (nmol O2/ mg prot), energetic coupling and membrane potential and a higher % fraction of proton leak in older age clams of both species. Changes were more apparent in the temperate than the polar clam. In vitro H2O2 generation of succinate respiring mitochondria was 2 to 10-fold higher in the temperate compared to the polar clam and increased significantly with ageing. Antioxidant capacities were higher in the polar clam.Mitochondria of temperate mud clams show a pronounced loss of functioning, accelerated ROS release and their cellular redox milieu became more oxidized with ageing. Polar mud clams preserve cellular redox potential and mitochondrial functioning better in aged specimens and limit the production of mitochondrial ROS to lower levels. Together with a well developed AOX system, this may enable these animals to reach older ages than their temperate relatives.
format Conference Object
author Philipp, Eva
Abele, Doris
Pörtner, Hans-Otto
spellingShingle Philipp, Eva
Abele, Doris
Pörtner, Hans-Otto
Polar marine bivalves stay younger than their North Sea relatives
author_facet Philipp, Eva
Abele, Doris
Pörtner, Hans-Otto
author_sort Philipp, Eva
title Polar marine bivalves stay younger than their North Sea relatives
title_short Polar marine bivalves stay younger than their North Sea relatives
title_full Polar marine bivalves stay younger than their North Sea relatives
title_fullStr Polar marine bivalves stay younger than their North Sea relatives
title_full_unstemmed Polar marine bivalves stay younger than their North Sea relatives
title_sort polar marine bivalves stay younger than their north sea relatives
publishDate 2004
url https://epic.awi.de/id/eprint/10645/
https://hdl.handle.net/10013/epic.21116
geographic Antarctic
Antarctic Peninsula
King George Island
The Antarctic
geographic_facet Antarctic
Antarctic Peninsula
King George Island
The Antarctic
genre Antarc*
Antarctic
Antarctic Peninsula
King George Island
genre_facet Antarc*
Antarctic
Antarctic Peninsula
King George Island
op_source EPIC312th Biennial Meeting of the Society for Free Radical Research, SFRR 2004, Buenos Aires.
op_relation Philipp, E. , Abele, D. orcid:0000-0002-5766-5017 and Pörtner, H. O. orcid:0000-0001-6535-6575 (2004) Polar marine bivalves stay younger than their North Sea relatives , 12th Biennial Meeting of the Society for Free Radical Research, SFRR 2004, Buenos Aires. . hdl:10013/epic.21116
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