Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua)
http://dx.doi.org/10.1007/s00227-012-1984-8 Previous studies have found strong evidences for Atlantic cod (Gadus morhua) egg retention in fjords, which are caused by the combination of vertical salinity structure, estuarine circulation, and egg specific gravity, supporting small-scaled geographical...
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ftimr:oai:imr.brage.unit.no:11250/109045 2023-05-15T15:27:08+02:00 Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua) Jung, Kyung-Mi Folkvord, Arild Kjesbu, Olav Sigurd Agnalt, Ann-Lisbeth Thorsen, Anders Sundby, Svein 2012-06-29 application/pdf http://hdl.handle.net/11250/109045 eng eng Springer urn:issn:1432-1793 urn:issn:0025-3162 http://hdl.handle.net/11250/109045 12 p. Marine Biology VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Journal article Peer reviewed 2012 ftimr 2021-09-23T20:15:43Z http://dx.doi.org/10.1007/s00227-012-1984-8 Previous studies have found strong evidences for Atlantic cod (Gadus morhua) egg retention in fjords, which are caused by the combination of vertical salinity structure, estuarine circulation, and egg specific gravity, supporting small-scaled geographical differentiations of local populations. Here, we assess the variability in egg specific gravity for selected local populations of this species, that is, two fjord-spawning populations and one coastal-spawning population from Northern Norway (66–71°N/10–25°E). Eggs were naturally spawned by raised broodstocks (March to April 2009), and egg specific gravity was measured by a density-gradient column. The phenotype of egg specific gravity was similar among the three local populations. However, the associated variability was greater at the individual level than at the population level. The noted gradual decrease in specific gravity from gastrulation to hatching with an increase just before hatching could be a generic pattern in pelagic marine fish eggs. This study provides needed input to adequately understand and model fish egg dispersal. Article in Journal/Newspaper atlantic cod Gadus morhua Northern Norway Institute for Marine Research: Brage IMR Norway |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Jung, Kyung-Mi Folkvord, Arild Kjesbu, Olav Sigurd Agnalt, Ann-Lisbeth Thorsen, Anders Sundby, Svein Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua) |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
description |
http://dx.doi.org/10.1007/s00227-012-1984-8 Previous studies have found strong evidences for Atlantic cod (Gadus morhua) egg retention in fjords, which are caused by the combination of vertical salinity structure, estuarine circulation, and egg specific gravity, supporting small-scaled geographical differentiations of local populations. Here, we assess the variability in egg specific gravity for selected local populations of this species, that is, two fjord-spawning populations and one coastal-spawning population from Northern Norway (66–71°N/10–25°E). Eggs were naturally spawned by raised broodstocks (March to April 2009), and egg specific gravity was measured by a density-gradient column. The phenotype of egg specific gravity was similar among the three local populations. However, the associated variability was greater at the individual level than at the population level. The noted gradual decrease in specific gravity from gastrulation to hatching with an increase just before hatching could be a generic pattern in pelagic marine fish eggs. This study provides needed input to adequately understand and model fish egg dispersal. |
format |
Article in Journal/Newspaper |
author |
Jung, Kyung-Mi Folkvord, Arild Kjesbu, Olav Sigurd Agnalt, Ann-Lisbeth Thorsen, Anders Sundby, Svein |
author_facet |
Jung, Kyung-Mi Folkvord, Arild Kjesbu, Olav Sigurd Agnalt, Ann-Lisbeth Thorsen, Anders Sundby, Svein |
author_sort |
Jung, Kyung-Mi |
title |
Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua) |
title_short |
Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua) |
title_full |
Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua) |
title_fullStr |
Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua) |
title_full_unstemmed |
Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua) |
title_sort |
egg buoyancy variability in local populations of atlantic cod (gadus morhua) |
publisher |
Springer |
publishDate |
2012 |
url |
http://hdl.handle.net/11250/109045 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
atlantic cod Gadus morhua Northern Norway |
genre_facet |
atlantic cod Gadus morhua Northern Norway |
op_source |
12 p. Marine Biology |
op_relation |
urn:issn:1432-1793 urn:issn:0025-3162 http://hdl.handle.net/11250/109045 |
_version_ |
1766357595878064128 |