Precision of Ages Estimated from Five Bony Structures of Arctic Char ( Salvelinus alpinus ) from the Wood River System, Alaska
Ages of 32 Arctic char (Salvelinus alpinus) were estimated from otoliths (surface-examined and broken-and-burned), vertebrae, cleithra, opercula, and subopercula. Six readers examined each structure three times, and the precision of these estimates among structures and readers was compared with mean...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1991
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Online Access: | http://dx.doi.org/10.1139/f91-118 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-118 |
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crcansciencepubl:10.1139/f91-118 2023-12-17T10:24:00+01:00 Precision of Ages Estimated from Five Bony Structures of Arctic Char ( Salvelinus alpinus ) from the Wood River System, Alaska Baker, Timothy T. Timmons, L. Saree 1991 http://dx.doi.org/10.1139/f91-118 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-118 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 6, page 1007-1014 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1991 crcansciencepubl https://doi.org/10.1139/f91-118 2023-11-19T13:39:17Z Ages of 32 Arctic char (Salvelinus alpinus) were estimated from otoliths (surface-examined and broken-and-burned), vertebrae, cleithra, opercula, and subopercula. Six readers examined each structure three times, and the precision of these estimates among structures and readers was compared with means, aging differences, and analyses of variance. Surface-examined otoliths provided the most precise age estimates and were one of the easiest structures to prepare and read. Broken-and-burned otoliths produced less precise estimates for larger, older Arctic char than for smaller, younger Arctic char. Based on lack of precision, cleithra should probably not be used to age Arctic char. Although mean estimates for the five structures were not significantly different, surface-examined otoliths produced older age estimates than break and burn otoliths. We feel that surface-examined otoliths are best for precise estimation of age of Arctic char but recommend that both otolith methods be compared when aging Arctic char older than 8 yr. Scales were also examined from 30 Arctic char but were not included in the analyses after preliminary examination because age was difficult to interpret (circuli were clear on all scales, but only two or three annuli of uncertain significance could be distinguished). Article in Journal/Newspaper Arctic Salvelinus alpinus Alaska Canadian Science Publishing (via Crossref) Arctic Wood River ENVELOPE(-63.157,-63.157,82.502,82.502) Canadian Journal of Fisheries and Aquatic Sciences 48 6 1007 1014 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Baker, Timothy T. Timmons, L. Saree Precision of Ages Estimated from Five Bony Structures of Arctic Char ( Salvelinus alpinus ) from the Wood River System, Alaska |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Ages of 32 Arctic char (Salvelinus alpinus) were estimated from otoliths (surface-examined and broken-and-burned), vertebrae, cleithra, opercula, and subopercula. Six readers examined each structure three times, and the precision of these estimates among structures and readers was compared with means, aging differences, and analyses of variance. Surface-examined otoliths provided the most precise age estimates and were one of the easiest structures to prepare and read. Broken-and-burned otoliths produced less precise estimates for larger, older Arctic char than for smaller, younger Arctic char. Based on lack of precision, cleithra should probably not be used to age Arctic char. Although mean estimates for the five structures were not significantly different, surface-examined otoliths produced older age estimates than break and burn otoliths. We feel that surface-examined otoliths are best for precise estimation of age of Arctic char but recommend that both otolith methods be compared when aging Arctic char older than 8 yr. Scales were also examined from 30 Arctic char but were not included in the analyses after preliminary examination because age was difficult to interpret (circuli were clear on all scales, but only two or three annuli of uncertain significance could be distinguished). |
format |
Article in Journal/Newspaper |
author |
Baker, Timothy T. Timmons, L. Saree |
author_facet |
Baker, Timothy T. Timmons, L. Saree |
author_sort |
Baker, Timothy T. |
title |
Precision of Ages Estimated from Five Bony Structures of Arctic Char ( Salvelinus alpinus ) from the Wood River System, Alaska |
title_short |
Precision of Ages Estimated from Five Bony Structures of Arctic Char ( Salvelinus alpinus ) from the Wood River System, Alaska |
title_full |
Precision of Ages Estimated from Five Bony Structures of Arctic Char ( Salvelinus alpinus ) from the Wood River System, Alaska |
title_fullStr |
Precision of Ages Estimated from Five Bony Structures of Arctic Char ( Salvelinus alpinus ) from the Wood River System, Alaska |
title_full_unstemmed |
Precision of Ages Estimated from Five Bony Structures of Arctic Char ( Salvelinus alpinus ) from the Wood River System, Alaska |
title_sort |
precision of ages estimated from five bony structures of arctic char ( salvelinus alpinus ) from the wood river system, alaska |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/f91-118 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-118 |
long_lat |
ENVELOPE(-63.157,-63.157,82.502,82.502) |
geographic |
Arctic Wood River |
geographic_facet |
Arctic Wood River |
genre |
Arctic Salvelinus alpinus Alaska |
genre_facet |
Arctic Salvelinus alpinus Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 6, page 1007-1014 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f91-118 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
48 |
container_issue |
6 |
container_start_page |
1007 |
op_container_end_page |
1014 |
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1785561928595144704 |