Validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13C trends in teeth
Isotopic time series from sequentially sampled growth layer groups (GLGs) in marine mammal teeth can be combined to build chronologies allowing assessment of isotopic variation in marine ecosystems. Synchronous recording of baseline isotopic variation across dentinal GLGs of species with temporal an...
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Language: | English |
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Septentrio Academic Publishing
2014
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Online Access: | https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3196 https://doi.org/10.7557/3.3196 |
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/3196 2023-05-15T15:08:06+02:00 Validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13C trends in teeth Matthews, Cory JD Ferguson, Steven H 2014-11-26 application/pdf https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3196 https://doi.org/10.7557/3.3196 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3196/3137 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3196 doi:10.7557/3.3196 Copyright (c) 2014 Cory JD Matthews, Steven H Ferguson http://creativecommons.org/licenses/by/3.0/ CC-BY NAMMCO Scientific Publications; Vol 10: Age estimation of marine mammals with a focus on monodontids 2309-2491 1560-2206 10.7557/3.10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftunitroemsoe https://doi.org/10.7557/3.3196 https://doi.org/10.7557/3.10 2021-08-16T16:42:48Z Isotopic time series from sequentially sampled growth layer groups (GLGs) in marine mammal teeth can be combined to build chronologies allowing assessment of isotopic variation in marine ecosystems. Synchronous recording of baseline isotopic variation across dentinal GLGs of species with temporal and spatial overlap in foraging offers a unique opportunity for validation of marine mammal age estimation procedures through calibration of GLG deposition rates in one species against another whose GLG deposition has been independently determined. In this study, we compare trends in stable carbon isotope ratios (d13C) across dentinal GLGs of three eastern Canadian Arctic (ECA) beluga (Delphinapterus leucas) populations through the 1960s-2000s with a d13C time series measured across dentinal GLGs of ECA/Northwest Atlantic killer whales (Orcinus orca) from 1944-1999. We use confirmed annual GLG deposition in killer whales as a means to assess beluga GLG deposition, and show linear d13C declines across chronologies of both species were statistically indistinguishable when based on annual GLG deposition in beluga whales, but differed when based on biannual deposition. We suggest d13C declines reflect the oceanic 13C Suess effect, and provide additional support for annual GLG deposition in beluga whales by comparing rates of d13C declines across beluga GLGs with published annual d13C declines attributed to the oceanic 13C Suess effect in the North Atlantic. Article in Journal/Newspaper Arctic Beluga Beluga* Delphinapterus leucas North Atlantic Northwest Atlantic Orca Orcinus orca University of Tromsø: Septentrio Academic Publishing Arctic NAMMCO Scientific Publications 8 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
description |
Isotopic time series from sequentially sampled growth layer groups (GLGs) in marine mammal teeth can be combined to build chronologies allowing assessment of isotopic variation in marine ecosystems. Synchronous recording of baseline isotopic variation across dentinal GLGs of species with temporal and spatial overlap in foraging offers a unique opportunity for validation of marine mammal age estimation procedures through calibration of GLG deposition rates in one species against another whose GLG deposition has been independently determined. In this study, we compare trends in stable carbon isotope ratios (d13C) across dentinal GLGs of three eastern Canadian Arctic (ECA) beluga (Delphinapterus leucas) populations through the 1960s-2000s with a d13C time series measured across dentinal GLGs of ECA/Northwest Atlantic killer whales (Orcinus orca) from 1944-1999. We use confirmed annual GLG deposition in killer whales as a means to assess beluga GLG deposition, and show linear d13C declines across chronologies of both species were statistically indistinguishable when based on annual GLG deposition in beluga whales, but differed when based on biannual deposition. We suggest d13C declines reflect the oceanic 13C Suess effect, and provide additional support for annual GLG deposition in beluga whales by comparing rates of d13C declines across beluga GLGs with published annual d13C declines attributed to the oceanic 13C Suess effect in the North Atlantic. |
format |
Article in Journal/Newspaper |
author |
Matthews, Cory JD Ferguson, Steven H |
spellingShingle |
Matthews, Cory JD Ferguson, Steven H Validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13C trends in teeth |
author_facet |
Matthews, Cory JD Ferguson, Steven H |
author_sort |
Matthews, Cory JD |
title |
Validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13C trends in teeth |
title_short |
Validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13C trends in teeth |
title_full |
Validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13C trends in teeth |
title_fullStr |
Validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13C trends in teeth |
title_full_unstemmed |
Validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13C trends in teeth |
title_sort |
validation of dentine deposition rates in beluga whales by interspecies cross dating of temporal δ13c trends in teeth |
publisher |
Septentrio Academic Publishing |
publishDate |
2014 |
url |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3196 https://doi.org/10.7557/3.3196 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beluga Beluga* Delphinapterus leucas North Atlantic Northwest Atlantic Orca Orcinus orca |
genre_facet |
Arctic Beluga Beluga* Delphinapterus leucas North Atlantic Northwest Atlantic Orca Orcinus orca |
op_source |
NAMMCO Scientific Publications; Vol 10: Age estimation of marine mammals with a focus on monodontids 2309-2491 1560-2206 10.7557/3.10 |
op_relation |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3196/3137 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3196 doi:10.7557/3.3196 |
op_rights |
Copyright (c) 2014 Cory JD Matthews, Steven H Ferguson http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/3.3196 https://doi.org/10.7557/3.10 |
container_title |
NAMMCO Scientific Publications |
container_volume |
8 |
_version_ |
1766339526748274688 |