Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions
We examined otolith opacity of Baltic cod in relation to environmental conditions in order to evaluate the formation mechanisms of seasonal patterns used in age determination. Adult fish were tagged with data storage tags (DSTs) and a permanent mark was induced in the otoliths by injection of a stro...
Published in: | Marine Ecology Progress Series |
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Language: | English |
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2009
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Online Access: | https://orbit.dtu.dk/en/publications/e15ea06c-56a2-4960-bee4-9f00f979ab4f https://doi.org/10.3354/meps07876 |
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ftdtupubl:oai:pure.atira.dk:publications/e15ea06c-56a2-4960-bee4-9f00f979ab4f 2024-04-28T08:19:33+00:00 Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions Hüssy, Karin Nielsen, Birgitte Mosegaard, Henrik Worsøe Clausen, Lotte 2009 https://orbit.dtu.dk/en/publications/e15ea06c-56a2-4960-bee4-9f00f979ab4f https://doi.org/10.3354/meps07876 eng eng https://orbit.dtu.dk/en/publications/e15ea06c-56a2-4960-bee4-9f00f979ab4f info:eu-repo/semantics/restrictedAccess Hüssy , K , Nielsen , B , Mosegaard , H & Worsøe Clausen , L 2009 , ' Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions ' , Marine Ecology Progress Series , vol. 378 , pp. 161-170 . https://doi.org/10.3354/meps07876 article 2009 ftdtupubl https://doi.org/10.3354/meps07876 2024-04-10T14:21:44Z We examined otolith opacity of Baltic cod in relation to environmental conditions in order to evaluate the formation mechanisms of seasonal patterns used in age determination. Adult fish were tagged with data storage tags (DSTs) and a permanent mark was induced in the otoliths by injection of a strontium chloride solution. Based on environmental conditions experienced, fish were classified into different behavioural types: non-reproducing 'non-spawner', and 'spawner' undertaking spawning migrations. Otolith opacity, an indicator of otolith and fish somatic growth and condition, was examined in relation to these environmental drivers. Temperature was the only environmental variable with a significant effect, overlaying a strong size-related effect. The temperature effect was not uniform across behavioural types and spawning periods. Opacity showed a negative correlation with temperature as expected-but in non-spawning fish only. In spawners, the general trend was a decrease in opacity from pre- to post spawning. A significant - but positive - temperature effect was only found in the pre-spawning period. The negative effects during and following spawning were not significant. In spawners, this decoupling leads to an otolith structure with stronger contrasts and more abrupt changes, while in non-spawners, opacity changes more smoothly. The trigger for this decoupling seems to be an interaction between temperature exposure and seasonal variations in food availability and may serve as a tool to identify the occurrence and repetitiveness of spawning in Baltic cod. Article in Journal/Newspaper Gadus morhua Technical University of Denmark: DTU Orbit Marine Ecology Progress Series 378 161 170 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
We examined otolith opacity of Baltic cod in relation to environmental conditions in order to evaluate the formation mechanisms of seasonal patterns used in age determination. Adult fish were tagged with data storage tags (DSTs) and a permanent mark was induced in the otoliths by injection of a strontium chloride solution. Based on environmental conditions experienced, fish were classified into different behavioural types: non-reproducing 'non-spawner', and 'spawner' undertaking spawning migrations. Otolith opacity, an indicator of otolith and fish somatic growth and condition, was examined in relation to these environmental drivers. Temperature was the only environmental variable with a significant effect, overlaying a strong size-related effect. The temperature effect was not uniform across behavioural types and spawning periods. Opacity showed a negative correlation with temperature as expected-but in non-spawning fish only. In spawners, the general trend was a decrease in opacity from pre- to post spawning. A significant - but positive - temperature effect was only found in the pre-spawning period. The negative effects during and following spawning were not significant. In spawners, this decoupling leads to an otolith structure with stronger contrasts and more abrupt changes, while in non-spawners, opacity changes more smoothly. The trigger for this decoupling seems to be an interaction between temperature exposure and seasonal variations in food availability and may serve as a tool to identify the occurrence and repetitiveness of spawning in Baltic cod. |
format |
Article in Journal/Newspaper |
author |
Hüssy, Karin Nielsen, Birgitte Mosegaard, Henrik Worsøe Clausen, Lotte |
spellingShingle |
Hüssy, Karin Nielsen, Birgitte Mosegaard, Henrik Worsøe Clausen, Lotte Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions |
author_facet |
Hüssy, Karin Nielsen, Birgitte Mosegaard, Henrik Worsøe Clausen, Lotte |
author_sort |
Hüssy, Karin |
title |
Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions |
title_short |
Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions |
title_full |
Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions |
title_fullStr |
Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions |
title_full_unstemmed |
Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions |
title_sort |
using data storage tags to link otolith macrostructure in baltic cod gadus morhua with environmental conditions |
publishDate |
2009 |
url |
https://orbit.dtu.dk/en/publications/e15ea06c-56a2-4960-bee4-9f00f979ab4f https://doi.org/10.3354/meps07876 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Hüssy , K , Nielsen , B , Mosegaard , H & Worsøe Clausen , L 2009 , ' Using data storage tags to link otolith macrostructure in Baltic cod Gadus morhua with environmental conditions ' , Marine Ecology Progress Series , vol. 378 , pp. 161-170 . https://doi.org/10.3354/meps07876 |
op_relation |
https://orbit.dtu.dk/en/publications/e15ea06c-56a2-4960-bee4-9f00f979ab4f |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3354/meps07876 |
container_title |
Marine Ecology Progress Series |
container_volume |
378 |
container_start_page |
161 |
op_container_end_page |
170 |
_version_ |
1797582998093168640 |