Report of the workshop on age estimation in beluga: Beaufort, North Carolina, US 5-9 December 2011
A workshop convened by C. Lockyer and A. A. Hohn to examine variation among readers in estimating beluga ages was held in Beaufort, North Carolina, US. Terms of Reference for the workshop included the following:1. Provide a guide as to acceptable levels of accuracy and precision for age reading that...
Published in: | NAMMCO Scientific Publications |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Septentrio Academic Publishing
2016
|
Subjects: | |
Online Access: | https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3731 https://doi.org/10.7557/3.3731 |
id |
ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/3731 |
---|---|
record_format |
openpolar |
spelling |
ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/3731 2023-05-15T15:41:28+02:00 Report of the workshop on age estimation in beluga: Beaufort, North Carolina, US 5-9 December 2011 Lockyer, Christina Hohn, Aleta A. Hobbs, Roderick Stewart, Robert EA 2016-02-03 application/pdf https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3731 https://doi.org/10.7557/3.3731 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3731/3628 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3731 doi:10.7557/3.3731 Copyright (c) 2016 Christina Lockyer, Aleta A. Hohn, Roderick Hobbs, Robert EA Stewart 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 age determination monodontids beluga Delphinapterus leucas narwhal Monodon monoceros info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftunitroemsoe https://doi.org/10.7557/3.3731 https://doi.org/10.7557/3.10 2021-08-16T16:42:48Z A workshop convened by C. Lockyer and A. A. Hohn to examine variation among readers in estimating beluga ages was held in Beaufort, North Carolina, US. Terms of Reference for the workshop included the following:1. Provide a guide as to acceptable levels of accuracy and precision for age reading that will enable ages to be used in population models.2. Conduct an inter-reader/laboratory comparison for calibration and standardization of age readings from GLG counts among all readers/laboratories.3. Provide information on validation that will enable GLG counts to be translated to real age.4. Produce a manual of guidelines for the preparation and reading of GLGs in beluga teeth.Presentations by participants are abstracted here. Then we report on the processes used to compare sections, images, and interpretation, and generate guidelines for best practices in beluga age estimation. A comparative study quantified differences among readers and found that precision of experienced readers was good, higher than reported for other odontocetes. Participants agreed that counting GLGs using well prepared thin sections was preferred because they are simpler to prepare than stained sections and there was more agreement among readers compared to using half sections. Examination of teeth from captive beluga as both untreated sections and stained sections and did not clarify the reading of wild beluga teeth. This Workshop concurred with Workshop 1 (Tampa 26-27 November 2011) that interpreting one GLG as an annual record is irrefutable. Guidelines for best practices were developed. Article in Journal/Newspaper Beluga Beluga* Delphinapterus leucas Monodon monoceros narwhal* University of Tromsø: Septentrio Academic Publishing Lockyer ENVELOPE(-57.599,-57.599,-64.447,-64.447) NAMMCO Scientific Publications 8 |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
age determination monodontids beluga Delphinapterus leucas narwhal Monodon monoceros |
spellingShingle |
age determination monodontids beluga Delphinapterus leucas narwhal Monodon monoceros Lockyer, Christina Hohn, Aleta A. Hobbs, Roderick Stewart, Robert EA Report of the workshop on age estimation in beluga: Beaufort, North Carolina, US 5-9 December 2011 |
topic_facet |
age determination monodontids beluga Delphinapterus leucas narwhal Monodon monoceros |
description |
A workshop convened by C. Lockyer and A. A. Hohn to examine variation among readers in estimating beluga ages was held in Beaufort, North Carolina, US. Terms of Reference for the workshop included the following:1. Provide a guide as to acceptable levels of accuracy and precision for age reading that will enable ages to be used in population models.2. Conduct an inter-reader/laboratory comparison for calibration and standardization of age readings from GLG counts among all readers/laboratories.3. Provide information on validation that will enable GLG counts to be translated to real age.4. Produce a manual of guidelines for the preparation and reading of GLGs in beluga teeth.Presentations by participants are abstracted here. Then we report on the processes used to compare sections, images, and interpretation, and generate guidelines for best practices in beluga age estimation. A comparative study quantified differences among readers and found that precision of experienced readers was good, higher than reported for other odontocetes. Participants agreed that counting GLGs using well prepared thin sections was preferred because they are simpler to prepare than stained sections and there was more agreement among readers compared to using half sections. Examination of teeth from captive beluga as both untreated sections and stained sections and did not clarify the reading of wild beluga teeth. This Workshop concurred with Workshop 1 (Tampa 26-27 November 2011) that interpreting one GLG as an annual record is irrefutable. Guidelines for best practices were developed. |
format |
Article in Journal/Newspaper |
author |
Lockyer, Christina Hohn, Aleta A. Hobbs, Roderick Stewart, Robert EA |
author_facet |
Lockyer, Christina Hohn, Aleta A. Hobbs, Roderick Stewart, Robert EA |
author_sort |
Lockyer, Christina |
title |
Report of the workshop on age estimation in beluga: Beaufort, North Carolina, US 5-9 December 2011 |
title_short |
Report of the workshop on age estimation in beluga: Beaufort, North Carolina, US 5-9 December 2011 |
title_full |
Report of the workshop on age estimation in beluga: Beaufort, North Carolina, US 5-9 December 2011 |
title_fullStr |
Report of the workshop on age estimation in beluga: Beaufort, North Carolina, US 5-9 December 2011 |
title_full_unstemmed |
Report of the workshop on age estimation in beluga: Beaufort, North Carolina, US 5-9 December 2011 |
title_sort |
report of the workshop on age estimation in beluga: beaufort, north carolina, us 5-9 december 2011 |
publisher |
Septentrio Academic Publishing |
publishDate |
2016 |
url |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3731 https://doi.org/10.7557/3.3731 |
long_lat |
ENVELOPE(-57.599,-57.599,-64.447,-64.447) |
geographic |
Lockyer |
geographic_facet |
Lockyer |
genre |
Beluga Beluga* Delphinapterus leucas Monodon monoceros narwhal* |
genre_facet |
Beluga Beluga* Delphinapterus leucas Monodon monoceros narwhal* |
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/3731/3628 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/3731 doi:10.7557/3.3731 |
op_rights |
Copyright (c) 2016 Christina Lockyer, Aleta A. Hohn, Roderick Hobbs, Robert EA Stewart http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.7557/3.3731 https://doi.org/10.7557/3.10 |
container_title |
NAMMCO Scientific Publications |
container_volume |
8 |
_version_ |
1766374366066507776 |