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Connectivity among subpopulations of Norwegian Coastal cod. Impacts of physical-biological factors during egg stages
Myksvoll, Mari Skuggedal
The University of Bergen 2012
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Título:
Connectivity among subpopulations of Norwegian Coastal cod. Impacts of physical-biological factors during egg stages
Autor:
Myksvoll, Mari Skuggedal
Assuntos:
Agriculture and fishery disciplines
;
Fisheries science
;
Marine biology
;
Mathematics and natural science
;
Zoology and botany
Notas:
978-82-308-2008-7
Paper III: Myksvoll, M. S., Sandvik, A. D., Asplin, L. and Sundby, S. Effects of river regulations on fjord dynamics and retention of coastal cod eggs. Full text not available in BORA.
Paper I: Myksvoll, M. S., Sundby, S., Adlandsvik, B. and Vikebø, F. Retention of coastal cod eggs in a fjord caused by interactions between egg buoyancy and circulation pattern. Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science 3(1): 279-294, August 2011. The article is available at: http://hdl.handle.net/1956/5755
Paper IV: Myksvoll, M. S., Jung, K. M., Albretsen, J. and Sundby, S. Modeling dispersal of eggs and quantifying connectivity among Norwegian Coastal cod subpopulations. Full text not available in BORA.
http://hdl.handle.net/1956/5756
Paper II: Myksvoll, M. S., Sandvik, A. D., Skarohamar, J. and Sundby, S. Importance of high resolution wind forcing on eddy activity and particle dispersion in a Norwegian fjord. Full text not available in BORA.
Descrição:
Norwegian Coastal cod form a stationary population of Atlantic cod ( Gadus morhua L.) consisting of several genetically separated subpopulations. A small-scale differen- tiation in marine populations with pelagic eggs and larvae is made possible by local retention of early life stages in coastal regions. A numerical model was implemented for a part of the northern Norwegian coast with 800 m horizontal resolution, in addition to two fjord systems with higher resolution; Folda in Nordland and Porsangerfjorden in Finnmark. The model results were used to simulate connectivity and retention of cod eggs among coastal regions and fjords. The cod eggs in Folda attained a subsur- face vertical distribution, avoiding the surface and causing retention. River regulations caused by hydroelectric power production alters the seasonal runoff cycle and reduced the retention of cod eggs in Folda. The dispersion of planktonic organisms in Por- sangerfjorden is highly affected by the local wind and varies with resolution on the atmospheric forcing in the model. Coastal spawning areas have intermediate connec- tivity of early life stages between neighboring areas. High retention of eggs in fjords combined with strong homing to spawning areas indicate that fjord subpopulations may be described as a metapopulation.
Editor:
The University of Bergen
Data de criação/publicação:
2012
Idioma:
Inglês
Links
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