Die biologischen Voraussetzungen für einen guten Dorschnachwuchs verbesserten sich 1994 in der westlichen Ostsee

Oeberst, Rainer and Bleil, Martina (1996) Die biologischen Voraussetzungen für einen guten Dorschnachwuchs verbesserten sich 1994 in der westlichen Ostsee. Informationen für die Fischwirtschaft aus der Fischereiforschung, 43(4), pp. 175-179.

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Official URL: http://aquacomm.fcla.edu/4215

Abstract

The investigations on the fecundity of cod from different areas of the Baltic Sea started in 1992. The samples were collected in ICES Sub-divisions 25 (Bornholm Sea). 24 (Arkona Sea) and 22 (Mecklenburg and Kiel Bay). This article surnmarizes the results of 435 analysed gonads from females of age groups 1 to 8 with total length of 24 - 116 cm of the years 1992 to 1995. The gonads were prepared and analysed according to the methods which were deseribed in Bleil and Oeberst (1993). The aim of the investigations is to estimate the reproduction potential of cod for different areas and years. For this reason the absolute and relative fecundity were analysed for estimating the dependence on the total length, for age groups and the weight of females. These data were estimated for the populations Gadus morhua morhua and Gadus morhua callarias. Preliminary results have shown that the absolute fecundity (fabs) is dependent on whole weight of the females. The influence of sub-divisions (SD) and years to the fecundity are very low. Additional to this data was calculated the population fecundity for the western Baltic Sea stock (SD 22 and 24). The numbers of produced ripe eggs within the western Baltic were estimated with 4055.59 x 10(9) for 1993 and 6949.85 x 10(9) for 1994.

Item Type: Article
Title: Die biologischen Voraussetzungen für einen guten Dorschnachwuchs verbesserten sich 1994 in der westlichen Ostsee
Personal Creator/Author:
CreatorsEmail
Oeberst, Rainerrainer.oeberst@vti.bund.de
Bleil, Martinamartina.bleil@vti.bund.de
Refereed: No
Journal or Publication Title: Informationen für die Fischwirtschaft aus der Fischereiforschung
Volume: 43
Number: 4
Page Range: pp. 175-179
Date: 1996
ISSN: 1437-5842
Contact Email Address: rainer.oeberst@vti.bund.de
Issuing Agency: Bundesforschungsanstalt für Fischerei
Additional Information: Johann Heinrich von Thünen-Institut, 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; stock development; reproduction; fecundity
Subjects: Fisheries
Biology
Item ID: 4215
Depositing User: Horst Bahl
Date Deposited: 28 Oct 2010 12:13
Last Modified: 10 Nov 2012 18:54
Related URLs:
URI: http://aquaticcommons.org/id/eprint/4215

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