A reliable method for ageing of whiting (Merlangius merlangus) for use in stock assessment and management

Stine Dalmann Ross, Karin Hüssy

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Accurate age estimation is important for stock assessment and management. The importance of reliable ageing is emphasized by the impending analytical assessment of whiting (Merlangius merlangus) in the Baltic Sea. Whiting is a
top predator in the western Baltic Sea, where it is fished commercially although less extensively compared to the North Sea. Although the species is considered one of the most difficult gadoids to age, few efforts have been made to
shed light on the ageing problems. The aim of the present study was to identify and validate the 1st winter ring and to examine the visibility of the subsequent winter rings. Microstructure analysis was used to confirm the 1st winter ring.
Additionally, otolith growth trajectories were obtained, confirming the allometric growth as seen in many fish species. The method for ageing of whole otoliths presented in this study can be directly implemented in future ageing of whiting
otoliths from the Baltic Sea – and potentially also adjacent areas where the conspecifics have similar growth rates
Original languageEnglish
JournalJournal of Applied Ichthyology
Volume29
Pages (from-to)825-832
ISSN0175-8659
DOIs
Publication statusPublished - 2013

Cite this

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title = "A reliable method for ageing of whiting (Merlangius merlangus) for use in stock assessment and management",
abstract = "Accurate age estimation is important for stock assessment and management. The importance of reliable ageing is emphasized by the impending analytical assessment of whiting (Merlangius merlangus) in the Baltic Sea. Whiting is a top predator in the western Baltic Sea, where it is fished commercially although less extensively compared to the North Sea. Although the species is considered one of the most difficult gadoids to age, few efforts have been made to shed light on the ageing problems. The aim of the present study was to identify and validate the 1st winter ring and to examine the visibility of the subsequent winter rings. Microstructure analysis was used to confirm the 1st winter ring. Additionally, otolith growth trajectories were obtained, confirming the allometric growth as seen in many fish species. The method for ageing of whole otoliths presented in this study can be directly implemented in future ageing of whiting otoliths from the Baltic Sea – and potentially also adjacent areas where the conspecifics have similar growth rates",
author = "Ross, {Stine Dalmann} and Karin H{\"u}ssy",
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journal = "Journal of Applied Ichthyology",
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A reliable method for ageing of whiting (Merlangius merlangus) for use in stock assessment and management. / Ross, Stine Dalmann; Hüssy, Karin.

In: Journal of Applied Ichthyology, Vol. 29, 2013, p. 825-832.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A reliable method for ageing of whiting (Merlangius merlangus) for use in stock assessment and management

AU - Ross, Stine Dalmann

AU - Hüssy, Karin

PY - 2013

Y1 - 2013

N2 - Accurate age estimation is important for stock assessment and management. The importance of reliable ageing is emphasized by the impending analytical assessment of whiting (Merlangius merlangus) in the Baltic Sea. Whiting is a top predator in the western Baltic Sea, where it is fished commercially although less extensively compared to the North Sea. Although the species is considered one of the most difficult gadoids to age, few efforts have been made to shed light on the ageing problems. The aim of the present study was to identify and validate the 1st winter ring and to examine the visibility of the subsequent winter rings. Microstructure analysis was used to confirm the 1st winter ring. Additionally, otolith growth trajectories were obtained, confirming the allometric growth as seen in many fish species. The method for ageing of whole otoliths presented in this study can be directly implemented in future ageing of whiting otoliths from the Baltic Sea – and potentially also adjacent areas where the conspecifics have similar growth rates

AB - Accurate age estimation is important for stock assessment and management. The importance of reliable ageing is emphasized by the impending analytical assessment of whiting (Merlangius merlangus) in the Baltic Sea. Whiting is a top predator in the western Baltic Sea, where it is fished commercially although less extensively compared to the North Sea. Although the species is considered one of the most difficult gadoids to age, few efforts have been made to shed light on the ageing problems. The aim of the present study was to identify and validate the 1st winter ring and to examine the visibility of the subsequent winter rings. Microstructure analysis was used to confirm the 1st winter ring. Additionally, otolith growth trajectories were obtained, confirming the allometric growth as seen in many fish species. The method for ageing of whole otoliths presented in this study can be directly implemented in future ageing of whiting otoliths from the Baltic Sea – and potentially also adjacent areas where the conspecifics have similar growth rates

U2 - 10.1111/jai.12204

DO - 10.1111/jai.12204

M3 - Journal article

VL - 29

SP - 825

EP - 832

JO - Journal of Applied Ichthyology

JF - Journal of Applied Ichthyology

SN - 0175-8659

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