Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua
Pelagic and demersal juvenile Baltic cod Gadus morhua L. were collected on the slope and the top of Rønne bank in the Baltic Sea during 2 cruises in November and December 1998. The objective of this study was to evaluate distinct changes in otolith increment width observed in demersal juveniles by c...
Published in: | Marine Ecology Progress Series |
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Online Access: | https://orbit.dtu.dk/en/publications/34a466f5-2a1e-44e8-ac73-b30db9ef97fd https://doi.org/10.3354/meps258243 https://backend.orbit.dtu.dk/ws/files/3694363/Mosegaard2.pdf http://www.int-res.com.dk/abstracts/meps/v258/p243-251/ |
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ftdtupubl:oai:pure.atira.dk:publications/34a466f5-2a1e-44e8-ac73-b30db9ef97fd 2023-07-30T04:03:33+02:00 Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua Hüssy, Karin Mosegaard, Henrik Hinrichsen, H.H. Böttcher, U. 2003 application/pdf https://orbit.dtu.dk/en/publications/34a466f5-2a1e-44e8-ac73-b30db9ef97fd https://doi.org/10.3354/meps258243 https://backend.orbit.dtu.dk/ws/files/3694363/Mosegaard2.pdf http://www.int-res.com.dk/abstracts/meps/v258/p243-251/ eng eng info:eu-repo/semantics/openAccess Hüssy , K , Mosegaard , H , Hinrichsen , H H & Böttcher , U 2003 , ' Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua ' , Marine Ecology - Progress Series , vol. 258 , pp. 243-251 . https://doi.org/10.3354/meps258243 Bestandsvurdering article 2003 ftdtupubl https://doi.org/10.3354/meps258243 2023-07-12T22:55:49Z Pelagic and demersal juvenile Baltic cod Gadus morhua L. were collected on the slope and the top of Rønne bank in the Baltic Sea during 2 cruises in November and December 1998. The objective of this study was to evaluate distinct changes in otolith increment width observed in demersal juveniles by comparison with laboratory-reared individuals, and to investigate the factors determining variation in these increments. The different increment-width patterns were identified with a method based on the widths of consecutive increments. Otolith increment widths of juvenile cod were found to be highly variable within and between individuals, in both the experimental and the field samples. The first change in increment pattern observed in the field samples was related to settling. The formation periodicity of increments within the different pattern intervals was confirmed with a growth model based on otolith growth rates of juvenile cod reared in the laboratory under different conditions. In this model, otolith growth rate was expressed as a function of rearing temperature and fish dry weight. Otolith growth of the field samples was calculated using ambient temperatures obtained from a 3D-circulation model. The best fit to observed otolith growth rates was obtained under the assumption that fish on the slope performed daily vertical migrations between the warm surface layer and the cold bottom layer. The data suggested that fish stayed in the surface layer during the first increment-pattern interval, performed vertical migrations during the second interval, and stayed in association with the seafloor in the subsequent interval, corresponding to the time after the breakdown of the thermocline. Article in Journal/Newspaper Gadus morhua Technical University of Denmark: DTU Orbit Marine Ecology Progress Series 258 243 251 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Bestandsvurdering |
spellingShingle |
Bestandsvurdering Hüssy, Karin Mosegaard, Henrik Hinrichsen, H.H. Böttcher, U. Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua |
topic_facet |
Bestandsvurdering |
description |
Pelagic and demersal juvenile Baltic cod Gadus morhua L. were collected on the slope and the top of Rønne bank in the Baltic Sea during 2 cruises in November and December 1998. The objective of this study was to evaluate distinct changes in otolith increment width observed in demersal juveniles by comparison with laboratory-reared individuals, and to investigate the factors determining variation in these increments. The different increment-width patterns were identified with a method based on the widths of consecutive increments. Otolith increment widths of juvenile cod were found to be highly variable within and between individuals, in both the experimental and the field samples. The first change in increment pattern observed in the field samples was related to settling. The formation periodicity of increments within the different pattern intervals was confirmed with a growth model based on otolith growth rates of juvenile cod reared in the laboratory under different conditions. In this model, otolith growth rate was expressed as a function of rearing temperature and fish dry weight. Otolith growth of the field samples was calculated using ambient temperatures obtained from a 3D-circulation model. The best fit to observed otolith growth rates was obtained under the assumption that fish on the slope performed daily vertical migrations between the warm surface layer and the cold bottom layer. The data suggested that fish stayed in the surface layer during the first increment-pattern interval, performed vertical migrations during the second interval, and stayed in association with the seafloor in the subsequent interval, corresponding to the time after the breakdown of the thermocline. |
format |
Article in Journal/Newspaper |
author |
Hüssy, Karin Mosegaard, Henrik Hinrichsen, H.H. Böttcher, U. |
author_facet |
Hüssy, Karin Mosegaard, Henrik Hinrichsen, H.H. Böttcher, U. |
author_sort |
Hüssy, Karin |
title |
Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua |
title_short |
Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua |
title_full |
Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua |
title_fullStr |
Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua |
title_full_unstemmed |
Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua |
title_sort |
factors determining variations in otolith microincrement width of demersal juvenile baltic cod gadus morhua |
publishDate |
2003 |
url |
https://orbit.dtu.dk/en/publications/34a466f5-2a1e-44e8-ac73-b30db9ef97fd https://doi.org/10.3354/meps258243 https://backend.orbit.dtu.dk/ws/files/3694363/Mosegaard2.pdf http://www.int-res.com.dk/abstracts/meps/v258/p243-251/ |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Hüssy , K , Mosegaard , H , Hinrichsen , H H & Böttcher , U 2003 , ' Factors determining variations in otolith microincrement width of demersal juvenile Baltic cod Gadus morhua ' , Marine Ecology - Progress Series , vol. 258 , pp. 243-251 . https://doi.org/10.3354/meps258243 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps258243 |
container_title |
Marine Ecology Progress Series |
container_volume |
258 |
container_start_page |
243 |
op_container_end_page |
251 |
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1772814589328621568 |