Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod
Previous studies showed that Baltic cod (Gadus morhua) settle to demersal life at a given size, while the annulus is formed seasonally, irrespective of size. The goal of this study was to examine the timing of check formation in juvenile Baltic cod otoliths to validate macrostructural ageing and to...
Published in: | ICES Journal of Marine Science |
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Language: | English |
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2012
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Online Access: | https://orbit.dtu.dk/en/publications/236a6b20-bc6b-4c9b-bc32-2750074e509a https://doi.org/10.1093/icesjms/fss112 |
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ftdtupubl:oai:pure.atira.dk:publications/236a6b20-bc6b-4c9b-bc32-2750074e509a 2024-09-15T18:07:16+00:00 Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod Rehberg-Haas, Sabine Hammer, Cornelius Hillgruber, Nicola Hüssy, Karin Temming, Axel 2012 https://orbit.dtu.dk/en/publications/236a6b20-bc6b-4c9b-bc32-2750074e509a https://doi.org/10.1093/icesjms/fss112 eng eng https://orbit.dtu.dk/en/publications/236a6b20-bc6b-4c9b-bc32-2750074e509a info:eu-repo/semantics/closedAccess Rehberg-Haas , S , Hammer , C , Hillgruber , N , Hüssy , K & Temming , A 2012 , ' Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod ' , ICES Journal of Marine Science , vol. 69 , no. 8 , pp. 1347-1356 . https://doi.org/10.1093/icesjms/fss112 annulus Baltic cod daily increment analysis Gadus morhua settlement check article 2012 ftdtupubl https://doi.org/10.1093/icesjms/fss112 2024-07-08T23:51:45Z Previous studies showed that Baltic cod (Gadus morhua) settle to demersal life at a given size, while the annulus is formed seasonally, irrespective of size. The goal of this study was to examine the timing of check formation in juvenile Baltic cod otoliths to validate macrostructural ageing and to differentiate between true annuli and secondary structures such as settlement checks. Otoliths were collected from fish off Fehmarn Island in 2008 and 2009, and were examined for macrostructural and microstructural patterns using light and scanning electron microscopy. All fish examined were age-0. Back-calculation of hatch dates indicated hatching from April to June and from February to August in 2008 and 2009, respectively. Juveniles formed either one or two translucent rings. The first translucent ring started to form ∼3 months post-hatch and was interpreted as a settlement check, since it appeared to be a function of age and/or size and not season. Deposition of the second ring began in mid October to early November irrespective of fish size and/or age, thus indicating that this ring may represent the first annulus of Baltic cod. Both rings were clearly distinguishable in individuals hatched between February and May, but were merged in those fish where settlement coincided with the seasonally formed second ring Article in Journal/Newspaper Gadus morhua Technical University of Denmark: DTU Orbit ICES Journal of Marine Science 69 8 1347 1356 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
annulus Baltic cod daily increment analysis Gadus morhua settlement check |
spellingShingle |
annulus Baltic cod daily increment analysis Gadus morhua settlement check Rehberg-Haas, Sabine Hammer, Cornelius Hillgruber, Nicola Hüssy, Karin Temming, Axel Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod |
topic_facet |
annulus Baltic cod daily increment analysis Gadus morhua settlement check |
description |
Previous studies showed that Baltic cod (Gadus morhua) settle to demersal life at a given size, while the annulus is formed seasonally, irrespective of size. The goal of this study was to examine the timing of check formation in juvenile Baltic cod otoliths to validate macrostructural ageing and to differentiate between true annuli and secondary structures such as settlement checks. Otoliths were collected from fish off Fehmarn Island in 2008 and 2009, and were examined for macrostructural and microstructural patterns using light and scanning electron microscopy. All fish examined were age-0. Back-calculation of hatch dates indicated hatching from April to June and from February to August in 2008 and 2009, respectively. Juveniles formed either one or two translucent rings. The first translucent ring started to form ∼3 months post-hatch and was interpreted as a settlement check, since it appeared to be a function of age and/or size and not season. Deposition of the second ring began in mid October to early November irrespective of fish size and/or age, thus indicating that this ring may represent the first annulus of Baltic cod. Both rings were clearly distinguishable in individuals hatched between February and May, but were merged in those fish where settlement coincided with the seasonally formed second ring |
format |
Article in Journal/Newspaper |
author |
Rehberg-Haas, Sabine Hammer, Cornelius Hillgruber, Nicola Hüssy, Karin Temming, Axel |
author_facet |
Rehberg-Haas, Sabine Hammer, Cornelius Hillgruber, Nicola Hüssy, Karin Temming, Axel |
author_sort |
Rehberg-Haas, Sabine |
title |
Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod |
title_short |
Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod |
title_full |
Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod |
title_fullStr |
Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod |
title_full_unstemmed |
Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod |
title_sort |
otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western baltic cod |
publishDate |
2012 |
url |
https://orbit.dtu.dk/en/publications/236a6b20-bc6b-4c9b-bc32-2750074e509a https://doi.org/10.1093/icesjms/fss112 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Rehberg-Haas , S , Hammer , C , Hillgruber , N , Hüssy , K & Temming , A 2012 , ' Otolith microstructure analysis to resolve seasonal patterns of hatching and settlement in western Baltic cod ' , ICES Journal of Marine Science , vol. 69 , no. 8 , pp. 1347-1356 . https://doi.org/10.1093/icesjms/fss112 |
op_relation |
https://orbit.dtu.dk/en/publications/236a6b20-bc6b-4c9b-bc32-2750074e509a |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/icesjms/fss112 |
container_title |
ICES Journal of Marine Science |
container_volume |
69 |
container_issue |
8 |
container_start_page |
1347 |
op_container_end_page |
1356 |
_version_ |
1810444649518596096 |