Variability in egg production of cod (Gadus morhua callarias L.) in the Central Baltic Sea
Recent findings indicate that stock size or stock biomass of expoited marine fish species does not reflect the true reproductive potential of a population. An explanation could be that the proportionality assumption between stock size and viable egg production inherent with many stock recruitment re...
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ftunivkiel:oai:macau.uni-kiel.de:diss_mods_00000608 2024-06-23T07:52:56+00:00 Variability in egg production of cod (Gadus morhua callarias L.) in the Central Baltic Sea Kraus, Gerd Schnack, Dietrich Rosenthal, Harald 2002 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-6080 https://macau.uni-kiel.de/receive/diss_mods_00000608 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00000608/d608.pdf eng eng https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-6080 https://macau.uni-kiel.de/receive/diss_mods_00000608 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00000608/d608.pdf https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess ddc:590 thesis Ostsee Ostseedorsch Fortpflanzung Fischbestand Egg production Baltic Sea Cod Dorsch Fecundity Atresia dissertation Text doc-type:PhDThesis 2002 ftunivkiel 2024-06-12T14:21:31Z Recent findings indicate that stock size or stock biomass of expoited marine fish species does not reflect the true reproductive potential of a population. An explanation could be that the proportionality assumption between stock size and viable egg production inherent with many stock recruitment relationships is invalid. Using Eastern Baltic cod as a test species, the present study focuses on individual and population egg production in the Bornholm Basin, presently the only important spawning ground in the Central Baltic Sea. One major aim was the investigation of individual fecundity, its spatial and temporal variation and the underlying processes responsible for its variability. Another focus was the population egg production in the Bornholm Basin, which is addressed with special emphasis on the causes of fluctuations over the last 25 years. Ovarian atresia was investigated as a regulatory mechanism of fecundity, and hence, the population egg production. Doctoral or Postdoctoral Thesis Gadus morhua MACAU: Open Access Repository of Kiel University |
institution |
Open Polar |
collection |
MACAU: Open Access Repository of Kiel University |
op_collection_id |
ftunivkiel |
language |
English |
topic |
ddc:590 thesis Ostsee Ostseedorsch Fortpflanzung Fischbestand Egg production Baltic Sea Cod Dorsch Fecundity Atresia |
spellingShingle |
ddc:590 thesis Ostsee Ostseedorsch Fortpflanzung Fischbestand Egg production Baltic Sea Cod Dorsch Fecundity Atresia Kraus, Gerd Variability in egg production of cod (Gadus morhua callarias L.) in the Central Baltic Sea |
topic_facet |
ddc:590 thesis Ostsee Ostseedorsch Fortpflanzung Fischbestand Egg production Baltic Sea Cod Dorsch Fecundity Atresia |
description |
Recent findings indicate that stock size or stock biomass of expoited marine fish species does not reflect the true reproductive potential of a population. An explanation could be that the proportionality assumption between stock size and viable egg production inherent with many stock recruitment relationships is invalid. Using Eastern Baltic cod as a test species, the present study focuses on individual and population egg production in the Bornholm Basin, presently the only important spawning ground in the Central Baltic Sea. One major aim was the investigation of individual fecundity, its spatial and temporal variation and the underlying processes responsible for its variability. Another focus was the population egg production in the Bornholm Basin, which is addressed with special emphasis on the causes of fluctuations over the last 25 years. Ovarian atresia was investigated as a regulatory mechanism of fecundity, and hence, the population egg production. |
author2 |
Schnack, Dietrich Rosenthal, Harald |
format |
Doctoral or Postdoctoral Thesis |
author |
Kraus, Gerd |
author_facet |
Kraus, Gerd |
author_sort |
Kraus, Gerd |
title |
Variability in egg production of cod (Gadus morhua callarias L.) in the Central Baltic Sea |
title_short |
Variability in egg production of cod (Gadus morhua callarias L.) in the Central Baltic Sea |
title_full |
Variability in egg production of cod (Gadus morhua callarias L.) in the Central Baltic Sea |
title_fullStr |
Variability in egg production of cod (Gadus morhua callarias L.) in the Central Baltic Sea |
title_full_unstemmed |
Variability in egg production of cod (Gadus morhua callarias L.) in the Central Baltic Sea |
title_sort |
variability in egg production of cod (gadus morhua callarias l.) in the central baltic sea |
publishDate |
2002 |
url |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-6080 https://macau.uni-kiel.de/receive/diss_mods_00000608 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00000608/d608.pdf |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-6080 https://macau.uni-kiel.de/receive/diss_mods_00000608 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00000608/d608.pdf |
op_rights |
https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess |
_version_ |
1802644388328767488 |