Age verification of north Atlantic sprat
Sprat is a pelagic species of increasing commercial interest in European waters, yet little is known about its biology or the drivers of its population fluctuations. As a result, the species is currently without an analytical assessment or forecast across much of the North East Atlantic. The objecti...
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Online Access: | https://archimer.ifremer.fr/doc/00485/59692/62883.pdf https://doi.org/10.1016/j.fishres.2019.01.018 https://archimer.ifremer.fr/doc/00485/59692/ |
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ftarchimer:oai:archimer.ifremer.fr:59692 2023-05-15T17:33:27+02:00 Age verification of north Atlantic sprat Moore, Claire Lynch, Deirdre Clarke, Maurice Officer, Rick Mills, Jane Dufour, Jean-louis Brophy, Deirdre 2019-05 application/pdf https://archimer.ifremer.fr/doc/00485/59692/62883.pdf https://doi.org/10.1016/j.fishres.2019.01.018 https://archimer.ifremer.fr/doc/00485/59692/ eng eng Elsevier Science Bv https://archimer.ifremer.fr/doc/00485/59692/62883.pdf doi:10.1016/j.fishres.2019.01.018 https://archimer.ifremer.fr/doc/00485/59692/ info:eu-repo/semantics/openAccess restricted use Fisheries Research (0165-7836) (Elsevier Science Bv), 2019-05 , Vol. 213 , P. 144-150 Sprat Age verification Otolith Marginal increment analysis Age structure text Publication info:eu-repo/semantics/article 2019 ftarchimer https://doi.org/10.1016/j.fishres.2019.01.018 2021-09-23T20:32:18Z Sprat is a pelagic species of increasing commercial interest in European waters, yet little is known about its biology or the drivers of its population fluctuations. As a result, the species is currently without an analytical assessment or forecast across much of the North East Atlantic. The objectives of this study were to: verify otolithbased age estimation of sprat; assess the precision, bias and reproducibility of these age estimates; and, determine the age structure of sprat within one North East Atlantic management unit (Celtic Seas ecoregion). Samples were collected over three years (2011, 2013 & 2014) from both commercial catches and scientific surveys. Counts of daily increments in otoliths were used to establish when the first annulus was formed. The seasonal development of annuli was validated using marginal increment analysis. Age estimates were found to be both accurate and reproducible with no intra-reader bias and limited inter-reader bias (average coefficient of variation 2.7%). The age estimates indicate that the stock is comprised primarily of age 0, 1 and 2 year olds. This study has provided previously unavailable information on the biology and age structure of this species which is required to improve assessment and sustainable management of the species. Article in Journal/Newspaper North Atlantic North East Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Fisheries Research 213 144 150 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Sprat Age verification Otolith Marginal increment analysis Age structure |
spellingShingle |
Sprat Age verification Otolith Marginal increment analysis Age structure Moore, Claire Lynch, Deirdre Clarke, Maurice Officer, Rick Mills, Jane Dufour, Jean-louis Brophy, Deirdre Age verification of north Atlantic sprat |
topic_facet |
Sprat Age verification Otolith Marginal increment analysis Age structure |
description |
Sprat is a pelagic species of increasing commercial interest in European waters, yet little is known about its biology or the drivers of its population fluctuations. As a result, the species is currently without an analytical assessment or forecast across much of the North East Atlantic. The objectives of this study were to: verify otolithbased age estimation of sprat; assess the precision, bias and reproducibility of these age estimates; and, determine the age structure of sprat within one North East Atlantic management unit (Celtic Seas ecoregion). Samples were collected over three years (2011, 2013 & 2014) from both commercial catches and scientific surveys. Counts of daily increments in otoliths were used to establish when the first annulus was formed. The seasonal development of annuli was validated using marginal increment analysis. Age estimates were found to be both accurate and reproducible with no intra-reader bias and limited inter-reader bias (average coefficient of variation 2.7%). The age estimates indicate that the stock is comprised primarily of age 0, 1 and 2 year olds. This study has provided previously unavailable information on the biology and age structure of this species which is required to improve assessment and sustainable management of the species. |
format |
Article in Journal/Newspaper |
author |
Moore, Claire Lynch, Deirdre Clarke, Maurice Officer, Rick Mills, Jane Dufour, Jean-louis Brophy, Deirdre |
author_facet |
Moore, Claire Lynch, Deirdre Clarke, Maurice Officer, Rick Mills, Jane Dufour, Jean-louis Brophy, Deirdre |
author_sort |
Moore, Claire |
title |
Age verification of north Atlantic sprat |
title_short |
Age verification of north Atlantic sprat |
title_full |
Age verification of north Atlantic sprat |
title_fullStr |
Age verification of north Atlantic sprat |
title_full_unstemmed |
Age verification of north Atlantic sprat |
title_sort |
age verification of north atlantic sprat |
publisher |
Elsevier Science Bv |
publishDate |
2019 |
url |
https://archimer.ifremer.fr/doc/00485/59692/62883.pdf https://doi.org/10.1016/j.fishres.2019.01.018 https://archimer.ifremer.fr/doc/00485/59692/ |
genre |
North Atlantic North East Atlantic |
genre_facet |
North Atlantic North East Atlantic |
op_source |
Fisheries Research (0165-7836) (Elsevier Science Bv), 2019-05 , Vol. 213 , P. 144-150 |
op_relation |
https://archimer.ifremer.fr/doc/00485/59692/62883.pdf doi:10.1016/j.fishres.2019.01.018 https://archimer.ifremer.fr/doc/00485/59692/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.fishres.2019.01.018 |
container_title |
Fisheries Research |
container_volume |
213 |
container_start_page |
144 |
op_container_end_page |
150 |
_version_ |
1766131957504147456 |