Laichen von Dorschen in Gefangenschaft. Teil 1: Verlauf der Laichaktivitäten

Bleil, Martina and Oeberst, Rainer (1998) Laichen von Dorschen in Gefangenschaft. Teil 1: Verlauf der Laichaktivitäten. Informationen für die Fischwirtschaft aus der Fischereiforschung, 45(4), pp. 164-170.

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Individuals of the western stock of Baltic cod were kept at captivity with different temperatures and salinities until natural spawning. Spawning activities up to 16 weeks were observed between February and June. This time interval agrees weIl with the spawning season of the wild cod stock. Also as in in-situ observations larger individuals started earlier with the spawning process than smaller ones and had significantly larger periods of spawning. Larger cods produced more batches and more eggs than smaller cods within this time interval. The comparison between the actual and potential absolut fecundity showed large differences. Only apart of the potential absolut fecundity, estimated in the phase of prespawning development of ovaries, was developed until their release. These analyses showed that larger cod were able to develop a larger part of the eggs within the ovaries up to the complete development. This result should be considered in the future during estimations of the population fecundity of the western Baltic spawning stock.

Item Type: Article
Title: Laichen von Dorschen in Gefangenschaft. Teil 1: Verlauf der Laichaktivitäten
Alternative Title: Spawning of cod in captivity. Part 1: Course of spawning activities
Personal Creator/Author:
Refereed: No
Journal or Publication Title: Informationen für die Fischwirtschaft aus der Fischereiforschung
Volume: 45
Number: 4
Page Range: pp. 164-170
Date: 1998
ISSN: 1437-5842
Contact Email Address:
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: recruitment;fertilization;hatching rate;larval development;Baltic Sea;
Subjects: Biology
Item ID: 3558
Depositing User: Horst Bahl
Date Deposited: 12 Aug 2010 13:59
Last Modified: 09 Nov 2012 13:42
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