Die Reproduktion von Dorschen (Gadus morhua L. und Gadus morhua callarias L. ) in der Ostsee unter besonderer Berücksichtigung der Arkonasee. Teil I: Allgemeiner Verlauf des jährlichen Reifeprozesses und der Laichaktivitäten in den verschiedenen Gebieten

Bleil, Martina and Oeberst, Rainer (2005) Die Reproduktion von Dorschen (Gadus morhua L. und Gadus morhua callarias L. ) in der Ostsee unter besonderer Berücksichtigung der Arkonasee. Teil I: Allgemeiner Verlauf des jährlichen Reifeprozesses und der Laichaktivitäten in den verschiedenen Gebieten. Informationen aus der Fischereiforschung = Information on Fishery Research, 52(1), pp. 74-82. DOI: 10.3220/Infn52_74-82_2005

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Official URL: http://aquacomm.fcla.edu/3070

Abstract

From 1993 to 2003 special surveys were conducted to analyse temporal and spatial aspects of the spawning activities of cod in the Baltic Sea. The ICES advice for cod in the Baltic Sea is based on yearly stock assessments of two separate stocks the western (SD 22 – 24) and the eastern stock (SD 25 – 32). Both stocks are characterized by different spawning seasons. The general progression of the maturity suggests that two types of development can be distinguished. In the western Baltic Sea (SD 22) the maturity development is temporal stable, with a relative short, main spawning period from March to April - spring spawner. In the Arkona Sea and Bornholm Basin the main spawning season starts in June and probably finishes in September - summer spawner. The proportion of spawners in summer is significantly higher than in spring in the Arkona Sea and Bornholm Basin. This again underlines the importance of the Arkona Sea for the reproduction success of the eastern Baltic cod stock. The analysis furthermore show, that the proportion of male spawners was significantly higher than the proportion of female spawners in all areas and the investigated months. This observation suggests that the reproductive success is only limited by the number of female cod which participates in the spawning process.

Item Type: Article
Title: Die Reproduktion von Dorschen (Gadus morhua L. und Gadus morhua callarias L. ) in der Ostsee unter besonderer Berücksichtigung der Arkonasee. Teil I: Allgemeiner Verlauf des jährlichen Reifeprozesses und der Laichaktivitäten in den verschiedenen Gebieten
Personal Creator/Author:
CreatorsEmail
Bleil, Martinamartina.bleil@vti.bund.de
Oeberst, Rainerrainer.oeberst@vti.bund.de
Refereed: No
Journal or Publication Title: Informationen aus der Fischereiforschung = Information on Fishery Research
Volume: 52
Number: 1
Page Range: pp. 74-82
Date: 2005
ISSN: 1861-2164
Contact Email Address: martina.bleil@vti.bund.de
Issuing Agency: Bundesforschungsanstalt für Fischerei
Additional Information: Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery Research in 2010.
Uncontrolled Keywords: spawning stocks; spawning aereas;
Subjects: Fisheries
Biology
Item ID: 3070
Depositing User: Horst Bahl
Date Deposited: 15 Apr 2010 12:50
Last Modified: 29 Sep 2011 17:57
Related URLs:
URI: http://aquaticcommons.org/id/eprint/3070

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