Influence of maternal effects and environmental conditions on growth and survival of Atlantic cod (Gadus morhua L.)
Commercially exploited stocks that have experienced declines in population abundance have responded by altering life history traits of growth and maturation. Cod is not only becoming mature at an earlier age but also, the majority of the stock comprises fishes with no previous spawning experience. A...
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ftunivkiel:oai:macau.uni-kiel.de:diss_mods_00001554 2024-06-23T07:51:03+00:00 Influence of maternal effects and environmental conditions on growth and survival of Atlantic cod (Gadus morhua L.) Buehler, Vivian Christiane Schnack, Dietrich Rosenthal, Harald 2004 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-15546 https://macau.uni-kiel.de/receive/diss_mods_00001554 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001554/d1554.pdf eng eng https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-15546 https://macau.uni-kiel.de/receive/diss_mods_00001554 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001554/d1554.pdf https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess ddc:570 thesis maternal effects overfishing fish larvae growth survival Atlantic cod otoliths bigger-is-better mesocosms genetic fingerprinting dissertation Text doc-type:PhDThesis 2004 ftunivkiel 2024-06-12T14:21:16Z Commercially exploited stocks that have experienced declines in population abundance have responded by altering life history traits of growth and maturation. Cod is not only becoming mature at an earlier age but also, the majority of the stock comprises fishes with no previous spawning experience. Actual fisheries management does not take in account qualitative differences within the spawning stock. If the stock responds to continued exploitation by shifting maturity to an earlier stage, fish will spawn at smaller sizes. They will produce smaller eggs, and consequently small and less viable larvae, so that the contribution to the spawning stock biomass will be less than expected. There are many advantages for delaying maturation: Larger and heavier fish will be better conditioned for spawning, have higher fecundity and larger eggs that are more viable. Harvesting at delayed recruitment enables the stock to maintain a larger SSB with an expanded age structure while supporting a sustainable fishery. Doctoral or Postdoctoral Thesis atlantic cod Gadus morhua MACAU: Open Access Repository of Kiel University |
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Open Polar |
collection |
MACAU: Open Access Repository of Kiel University |
op_collection_id |
ftunivkiel |
language |
English |
topic |
ddc:570 thesis maternal effects overfishing fish larvae growth survival Atlantic cod otoliths bigger-is-better mesocosms genetic fingerprinting |
spellingShingle |
ddc:570 thesis maternal effects overfishing fish larvae growth survival Atlantic cod otoliths bigger-is-better mesocosms genetic fingerprinting Buehler, Vivian Christiane Influence of maternal effects and environmental conditions on growth and survival of Atlantic cod (Gadus morhua L.) |
topic_facet |
ddc:570 thesis maternal effects overfishing fish larvae growth survival Atlantic cod otoliths bigger-is-better mesocosms genetic fingerprinting |
description |
Commercially exploited stocks that have experienced declines in population abundance have responded by altering life history traits of growth and maturation. Cod is not only becoming mature at an earlier age but also, the majority of the stock comprises fishes with no previous spawning experience. Actual fisheries management does not take in account qualitative differences within the spawning stock. If the stock responds to continued exploitation by shifting maturity to an earlier stage, fish will spawn at smaller sizes. They will produce smaller eggs, and consequently small and less viable larvae, so that the contribution to the spawning stock biomass will be less than expected. There are many advantages for delaying maturation: Larger and heavier fish will be better conditioned for spawning, have higher fecundity and larger eggs that are more viable. Harvesting at delayed recruitment enables the stock to maintain a larger SSB with an expanded age structure while supporting a sustainable fishery. |
author2 |
Schnack, Dietrich Rosenthal, Harald |
format |
Doctoral or Postdoctoral Thesis |
author |
Buehler, Vivian Christiane |
author_facet |
Buehler, Vivian Christiane |
author_sort |
Buehler, Vivian Christiane |
title |
Influence of maternal effects and environmental conditions on growth and survival of Atlantic cod (Gadus morhua L.) |
title_short |
Influence of maternal effects and environmental conditions on growth and survival of Atlantic cod (Gadus morhua L.) |
title_full |
Influence of maternal effects and environmental conditions on growth and survival of Atlantic cod (Gadus morhua L.) |
title_fullStr |
Influence of maternal effects and environmental conditions on growth and survival of Atlantic cod (Gadus morhua L.) |
title_full_unstemmed |
Influence of maternal effects and environmental conditions on growth and survival of Atlantic cod (Gadus morhua L.) |
title_sort |
influence of maternal effects and environmental conditions on growth and survival of atlantic cod (gadus morhua l.) |
publishDate |
2004 |
url |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-15546 https://macau.uni-kiel.de/receive/diss_mods_00001554 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001554/d1554.pdf |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-15546 https://macau.uni-kiel.de/receive/diss_mods_00001554 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001554/d1554.pdf |
op_rights |
https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess |
_version_ |
1802642043978121216 |