Age determination of a long-lived coregonid from the Canadian North: comparison of otoliths, fin rays and scales in inconnu (Stenodus leucichthys)
We examined otoliths, pelvic fin rays and scales of inconnu to determine precision of age estimates within and between readers, and to compare relative accuracy of estimates from different structures. Our main objective was to determine if readability and estimates from fin rays and scales, which ca...
Main Authors: | , , , |
---|---|
Format: | Other/Unknown Material |
Language: | English |
Published: |
2004
|
Subjects: | |
Online Access: | https://era.library.ualberta.ca/items/da2541ff-55ee-4085-b9bf-dfb38f8b8a34 https://doi.org/10.7939/R3DS0H |
id |
ftunivalberta:oai:era.library.ualberta.ca:da2541ff-55ee-4085-b9bf-dfb38f8b8a34 |
---|---|
record_format |
openpolar |
spelling |
ftunivalberta:oai:era.library.ualberta.ca:da2541ff-55ee-4085-b9bf-dfb38f8b8a34 2023-05-15T15:02:48+02:00 Age determination of a long-lived coregonid from the Canadian North: comparison of otoliths, fin rays and scales in inconnu (Stenodus leucichthys) Gendron, M. Tonn, W.M. Howland, K.L. Tallman, R.F. 2004 https://era.library.ualberta.ca/items/da2541ff-55ee-4085-b9bf-dfb38f8b8a34 https://doi.org/10.7939/R3DS0H English eng https://era.library.ualberta.ca/items/da2541ff-55ee-4085-b9bf-dfb38f8b8a34 doi:10.7939/R3DS0H © Finnish Zoological and Botanical Publishing Board 2004 Arctic Char Mackenzie River System Lake whitefish Alaska Fresh-water Growth Anadromous inconnu Clupeaformis Article (Published) 2004 ftunivalberta https://doi.org/10.7939/R3DS0H 2022-08-22T20:14:15Z We examined otoliths, pelvic fin rays and scales of inconnu to determine precision of age estimates within and between readers, and to compare relative accuracy of estimates from different structures. Our main objective was to determine if readability and estimates from fin rays and scales, which can be non-lethally removed, were similar to those of otoliths, which are generally considered the most reliable ageing structure. Among- and within-reader variation was low for both fin rays and otoliths, but higher for scales. Variation tended to increase with fish length for all structures. Scales were most difficult to read and had age estimates that were significantly lower than the other structures at ages of ten years and greater. Age estimates and readability of fin rays and otoliths were similar. Other/Unknown Material Arctic Mackenzie river Alaska University of Alberta: Era - Education and Research Archive Arctic Mackenzie River |
institution |
Open Polar |
collection |
University of Alberta: Era - Education and Research Archive |
op_collection_id |
ftunivalberta |
language |
English |
topic |
Arctic Char Mackenzie River System Lake whitefish Alaska Fresh-water Growth Anadromous inconnu Clupeaformis |
spellingShingle |
Arctic Char Mackenzie River System Lake whitefish Alaska Fresh-water Growth Anadromous inconnu Clupeaformis Gendron, M. Tonn, W.M. Howland, K.L. Tallman, R.F. Age determination of a long-lived coregonid from the Canadian North: comparison of otoliths, fin rays and scales in inconnu (Stenodus leucichthys) |
topic_facet |
Arctic Char Mackenzie River System Lake whitefish Alaska Fresh-water Growth Anadromous inconnu Clupeaformis |
description |
We examined otoliths, pelvic fin rays and scales of inconnu to determine precision of age estimates within and between readers, and to compare relative accuracy of estimates from different structures. Our main objective was to determine if readability and estimates from fin rays and scales, which can be non-lethally removed, were similar to those of otoliths, which are generally considered the most reliable ageing structure. Among- and within-reader variation was low for both fin rays and otoliths, but higher for scales. Variation tended to increase with fish length for all structures. Scales were most difficult to read and had age estimates that were significantly lower than the other structures at ages of ten years and greater. Age estimates and readability of fin rays and otoliths were similar. |
format |
Other/Unknown Material |
author |
Gendron, M. Tonn, W.M. Howland, K.L. Tallman, R.F. |
author_facet |
Gendron, M. Tonn, W.M. Howland, K.L. Tallman, R.F. |
author_sort |
Gendron, M. |
title |
Age determination of a long-lived coregonid from the Canadian North: comparison of otoliths, fin rays and scales in inconnu (Stenodus leucichthys) |
title_short |
Age determination of a long-lived coregonid from the Canadian North: comparison of otoliths, fin rays and scales in inconnu (Stenodus leucichthys) |
title_full |
Age determination of a long-lived coregonid from the Canadian North: comparison of otoliths, fin rays and scales in inconnu (Stenodus leucichthys) |
title_fullStr |
Age determination of a long-lived coregonid from the Canadian North: comparison of otoliths, fin rays and scales in inconnu (Stenodus leucichthys) |
title_full_unstemmed |
Age determination of a long-lived coregonid from the Canadian North: comparison of otoliths, fin rays and scales in inconnu (Stenodus leucichthys) |
title_sort |
age determination of a long-lived coregonid from the canadian north: comparison of otoliths, fin rays and scales in inconnu (stenodus leucichthys) |
publishDate |
2004 |
url |
https://era.library.ualberta.ca/items/da2541ff-55ee-4085-b9bf-dfb38f8b8a34 https://doi.org/10.7939/R3DS0H |
geographic |
Arctic Mackenzie River |
geographic_facet |
Arctic Mackenzie River |
genre |
Arctic Mackenzie river Alaska |
genre_facet |
Arctic Mackenzie river Alaska |
op_relation |
https://era.library.ualberta.ca/items/da2541ff-55ee-4085-b9bf-dfb38f8b8a34 doi:10.7939/R3DS0H |
op_rights |
© Finnish Zoological and Botanical Publishing Board 2004 |
op_doi |
https://doi.org/10.7939/R3DS0H |
_version_ |
1766334729461694464 |