A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
The distribution of cod larvae and copepod nauplii off the Lofoten islands was studied in the years 1979-82. The highest concentrations of cod larvae and copepod nauplii were found in the Austnesfjord, Hølla-Henningsvær and the Vesterålsfjord area. The feeding condition of cod larvae was studied in...
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ftimr:oai:imr.brage.unit.no:11250/115172 2024-09-09T19:40:56+00:00 A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983 Ellertsen, Bjørnar Fossum, Petter Solemdal, Per Sundby, Svein Tilseth, Snorre 1984 660445 bytes application/pdf http://hdl.handle.net/11250/115172 eng eng Havforskningsinstituttet Flødevigen rapportserie 1, 1984 urn:issn:0333-2594 http://hdl.handle.net/11250/115172 453-478 Conference object 1984 ftimr 2024-07-31T03:37:25Z The distribution of cod larvae and copepod nauplii off the Lofoten islands was studied in the years 1979-82. The highest concentrations of cod larvae and copepod nauplii were found in the Austnesfjord, Hølla-Henningsvær and the Vesterålsfjord area. The feeding condition of cod larvae was studied in relation to prey abundance, and a direct proportionality was seen between gut content and prey abundance in the larvae at the end of the first feeding period. Vertical migration of cod larvae was observed at a diurnal station in the Vesterålsfjord under calm weather conditions. The feeding condition of the cod larvae were bad under the prevalent prey density (<10 prey org. per 1) at this station. At a diurnal station in the Austnesfjord, the onset of turbulent mixing lowered the prey and cod larval densities and created a homogeneous vertical distribution of cod larvae and prey animals. This was reflected in the gut content analysis when the percentage of cod larvae with gut contents, and the number of prey organisms per larval gut and the percentage of newly taken prey organisms fell to a critical level. Conference Object Gadus morhua Henningsvær Lofoten Institute for Marine Research: Brage IMR Henningsvær ENVELOPE(14.199,14.199,68.152,68.152) Lofoten |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
The distribution of cod larvae and copepod nauplii off the Lofoten islands was studied in the years 1979-82. The highest concentrations of cod larvae and copepod nauplii were found in the Austnesfjord, Hølla-Henningsvær and the Vesterålsfjord area. The feeding condition of cod larvae was studied in relation to prey abundance, and a direct proportionality was seen between gut content and prey abundance in the larvae at the end of the first feeding period. Vertical migration of cod larvae was observed at a diurnal station in the Vesterålsfjord under calm weather conditions. The feeding condition of the cod larvae were bad under the prevalent prey density (<10 prey org. per 1) at this station. At a diurnal station in the Austnesfjord, the onset of turbulent mixing lowered the prey and cod larval densities and created a homogeneous vertical distribution of cod larvae and prey animals. This was reflected in the gut content analysis when the percentage of cod larvae with gut contents, and the number of prey organisms per larval gut and the percentage of newly taken prey organisms fell to a critical level. |
format |
Conference Object |
author |
Ellertsen, Bjørnar Fossum, Petter Solemdal, Per Sundby, Svein Tilseth, Snorre |
spellingShingle |
Ellertsen, Bjørnar Fossum, Petter Solemdal, Per Sundby, Svein Tilseth, Snorre A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983 |
author_facet |
Ellertsen, Bjørnar Fossum, Petter Solemdal, Per Sundby, Svein Tilseth, Snorre |
author_sort |
Ellertsen, Bjørnar |
title |
A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983 |
title_short |
A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983 |
title_full |
A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983 |
title_fullStr |
A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983 |
title_full_unstemmed |
A case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in Lofoten. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983 |
title_sort |
case study on the distribution of cod larvae and availability of prey organisms in relation to physical processes in lofoten. in: the propagation of cod gadus morhua l.: an international symposium, arendal, 14 - 17 june 1983 |
publisher |
Havforskningsinstituttet |
publishDate |
1984 |
url |
http://hdl.handle.net/11250/115172 |
long_lat |
ENVELOPE(14.199,14.199,68.152,68.152) |
geographic |
Henningsvær Lofoten |
geographic_facet |
Henningsvær Lofoten |
genre |
Gadus morhua Henningsvær Lofoten |
genre_facet |
Gadus morhua Henningsvær Lofoten |
op_source |
453-478 |
op_relation |
Flødevigen rapportserie 1, 1984 urn:issn:0333-2594 http://hdl.handle.net/11250/115172 |
_version_ |
1809910411134238720 |