An assessment of burbot ( Lota lota) weight–length data from North American popuplations
Declining burbot (Lota lota) abundance across some portions of North America has prompted a search for additional evaluation tools, including a measure of condition. Weight–length data were compiled for 10 293 burbot from 79 North American populations. These data were used to develop a 75th percenti...
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Language: | English |
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Canadian Science Publishing
1996
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Online Access: | http://dx.doi.org/10.1139/z96-063 http://www.nrcresearchpress.com/doi/pdf/10.1139/z96-063 |
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crcansciencepubl:10.1139/z96-063 2024-09-15T18:00:30+00:00 An assessment of burbot ( Lota lota) weight–length data from North American popuplations Fisher, Shannon J. Willis, David W. Pope, Kevin L. 1996 http://dx.doi.org/10.1139/z96-063 http://www.nrcresearchpress.com/doi/pdf/10.1139/z96-063 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 74, issue 3, page 570-575 ISSN 0008-4301 1480-3283 journal-article 1996 crcansciencepubl https://doi.org/10.1139/z96-063 2024-07-25T04:10:04Z Declining burbot (Lota lota) abundance across some portions of North America has prompted a search for additional evaluation tools, including a measure of condition. Weight–length data were compiled for 10 293 burbot from 79 North American populations. These data were used to develop a 75th percentile standard weight (W s ) equation using the regression-line-percentile technique. The proposed equation is log 10 W s = −4.868 + 2.898 log 10 TL, where W s is the standard weight in grams, and TL is the maximum total length in millimetres. The equation is valid for burbot ≥ 20 cm and will allow calculation of relative weights (W r ) for this species. Based on the length of the longest burbot in our data set (104.3 cm), we propose minimum standardized length categories of 20, 38, 53, 67, and 82 cm for stock, quality, preferred, memorable, and trophy length, respectively. The standard length categories will allow determination of mean W r by length group, as well as calculation of stock density indices. Differences in W r values were present between lentic and lotic burbot populations, suggesting variation in body shape and a need for establishment of different W r objective ranges. Article in Journal/Newspaper Burbot Lota lota lota Canadian Science Publishing Canadian Journal of Zoology 74 3 570 575 |
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Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Declining burbot (Lota lota) abundance across some portions of North America has prompted a search for additional evaluation tools, including a measure of condition. Weight–length data were compiled for 10 293 burbot from 79 North American populations. These data were used to develop a 75th percentile standard weight (W s ) equation using the regression-line-percentile technique. The proposed equation is log 10 W s = −4.868 + 2.898 log 10 TL, where W s is the standard weight in grams, and TL is the maximum total length in millimetres. The equation is valid for burbot ≥ 20 cm and will allow calculation of relative weights (W r ) for this species. Based on the length of the longest burbot in our data set (104.3 cm), we propose minimum standardized length categories of 20, 38, 53, 67, and 82 cm for stock, quality, preferred, memorable, and trophy length, respectively. The standard length categories will allow determination of mean W r by length group, as well as calculation of stock density indices. Differences in W r values were present between lentic and lotic burbot populations, suggesting variation in body shape and a need for establishment of different W r objective ranges. |
format |
Article in Journal/Newspaper |
author |
Fisher, Shannon J. Willis, David W. Pope, Kevin L. |
spellingShingle |
Fisher, Shannon J. Willis, David W. Pope, Kevin L. An assessment of burbot ( Lota lota) weight–length data from North American popuplations |
author_facet |
Fisher, Shannon J. Willis, David W. Pope, Kevin L. |
author_sort |
Fisher, Shannon J. |
title |
An assessment of burbot ( Lota lota) weight–length data from North American popuplations |
title_short |
An assessment of burbot ( Lota lota) weight–length data from North American popuplations |
title_full |
An assessment of burbot ( Lota lota) weight–length data from North American popuplations |
title_fullStr |
An assessment of burbot ( Lota lota) weight–length data from North American popuplations |
title_full_unstemmed |
An assessment of burbot ( Lota lota) weight–length data from North American popuplations |
title_sort |
assessment of burbot ( lota lota) weight–length data from north american popuplations |
publisher |
Canadian Science Publishing |
publishDate |
1996 |
url |
http://dx.doi.org/10.1139/z96-063 http://www.nrcresearchpress.com/doi/pdf/10.1139/z96-063 |
genre |
Burbot Lota lota lota |
genre_facet |
Burbot Lota lota lota |
op_source |
Canadian Journal of Zoology volume 74, issue 3, page 570-575 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z96-063 |
container_title |
Canadian Journal of Zoology |
container_volume |
74 |
container_issue |
3 |
container_start_page |
570 |
op_container_end_page |
575 |
_version_ |
1810437662358634496 |