The potential fecundity of cod in the Baltic Sea from 1993 to 1999
Investigations on the reproduction biology of cod in the Baltic Sea (Gadus morhua L. and G. morhua callarias L.) were carried out beginning in 1993, with yearly sampling of gonads to estimate the potential absolute and relative individual fecundity in the Belt Sea (subdivision, SD: 22) and in the Ar...
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ftopenagrar:oai:www.openagrar.de:timport_mods_00018112 2024-09-15T18:07:19+00:00 The potential fecundity of cod in the Baltic Sea from 1993 to 1999 Bleil, Martina Oeberst, Rainer 2005 8 https://www.openagrar.de/receive/timport_mods_00018112 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00018112/dk038938.pdf eng eng Journal of applied ichthyology -- Zeitschrift für angewandte Ichthyologie -- J Appl Ichthyol; Z Angew Ichthyol -- 0175-8659 -- 1439-0426 -- 283875-8 -- 2020412-7 -- http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1439-0426 https://www.openagrar.de/receive/timport_mods_00018112 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00018112/dk038938.pdf only signed in user info:eu-repo/semantics/restrictedAccess article Text article Text doc-type:article 2005 ftopenagrar 2024-07-08T23:56:24Z Investigations on the reproduction biology of cod in the Baltic Sea (Gadus morhua L. and G. morhua callarias L.) were carried out beginning in 1993, with yearly sampling of gonads to estimate the potential absolute and relative individual fecundity in the Belt Sea (subdivision, SD: 22) and in the Arkona Sea (SD: 24). Additional samples were taken in the Bornholm Sea (SD: 25). The potential absolute fecundity of the total area of investigation is described by the regression models: Fa = 6.89 x TL3.09 and Fa = -40 586 + 977.7 x W. As a further result the mean relative fecundity was 978 oocytes per gram body weight. Furthermore, it was shown that there was a difference in development of the potential individual fecundity between the Belt Sea cod and the original eastern Baltic cod stock. In contrast to the stable fecundity of cod in the Belt Sea, the fecundity of the large females in the Bornholm Sea significantly increased from 1993 to 1999. This change is related to a decrease in the dry weight of oocytes in the ovaries. In the same period this cod stock dramatically decreased. Article in Journal/Newspaper Gadus morhua OpenAgrar (OA) |
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article Text Bleil, Martina Oeberst, Rainer The potential fecundity of cod in the Baltic Sea from 1993 to 1999 |
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article Text |
description |
Investigations on the reproduction biology of cod in the Baltic Sea (Gadus morhua L. and G. morhua callarias L.) were carried out beginning in 1993, with yearly sampling of gonads to estimate the potential absolute and relative individual fecundity in the Belt Sea (subdivision, SD: 22) and in the Arkona Sea (SD: 24). Additional samples were taken in the Bornholm Sea (SD: 25). The potential absolute fecundity of the total area of investigation is described by the regression models: Fa = 6.89 x TL3.09 and Fa = -40 586 + 977.7 x W. As a further result the mean relative fecundity was 978 oocytes per gram body weight. Furthermore, it was shown that there was a difference in development of the potential individual fecundity between the Belt Sea cod and the original eastern Baltic cod stock. In contrast to the stable fecundity of cod in the Belt Sea, the fecundity of the large females in the Bornholm Sea significantly increased from 1993 to 1999. This change is related to a decrease in the dry weight of oocytes in the ovaries. In the same period this cod stock dramatically decreased. |
format |
Article in Journal/Newspaper |
author |
Bleil, Martina Oeberst, Rainer |
author_facet |
Bleil, Martina Oeberst, Rainer |
author_sort |
Bleil, Martina |
title |
The potential fecundity of cod in the Baltic Sea from 1993 to 1999 |
title_short |
The potential fecundity of cod in the Baltic Sea from 1993 to 1999 |
title_full |
The potential fecundity of cod in the Baltic Sea from 1993 to 1999 |
title_fullStr |
The potential fecundity of cod in the Baltic Sea from 1993 to 1999 |
title_full_unstemmed |
The potential fecundity of cod in the Baltic Sea from 1993 to 1999 |
title_sort |
potential fecundity of cod in the baltic sea from 1993 to 1999 |
publishDate |
2005 |
url |
https://www.openagrar.de/receive/timport_mods_00018112 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00018112/dk038938.pdf |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
Journal of applied ichthyology -- Zeitschrift für angewandte Ichthyologie -- J Appl Ichthyol; Z Angew Ichthyol -- 0175-8659 -- 1439-0426 -- 283875-8 -- 2020412-7 -- http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1439-0426 https://www.openagrar.de/receive/timport_mods_00018112 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00018112/dk038938.pdf |
op_rights |
only signed in user info:eu-repo/semantics/restrictedAccess |
_version_ |
1810444694618898432 |