| dc.contributor.author | Sturlaugsson, Johannes | |
| dc.contributor.author | Gudbjornsson, Sigmar | |
| dc.contributor.author | Stockhausen, Hans Hagen | |
| dc.date.accessioned | 2012-02-07T08:08:54Z | |
| dc.date.available | 2012-02-07T08:08:54Z | |
| dc.date.issued | 2009 | |
| dc.identifier.citation | This report is not to be quoted without prior consultation with the General Secretary. | no_NO |
| dc.identifier.uri | http://hdl.handle.net/11250/102930 | |
| dc.description | A migration study on the homing of Atlantic salmon was carried out in waters off SW –
Iceland. Data was sampled on the salmon behaviour and environment during spawning
migration in sea. New type of data storage tag was used to measure the earth‘s magnetic field
and the tilt (in 3 directions) and paired information on fish depth (pressure) and
correspondingly the temperature experienced. By taking advantage of this new research tool
we have managed in this study to bring forward new information on salmon orientation. The
study involves new approach in mapping information on behaviour and positioning of free
ranging fish.
Information already available from the study is showing that salmon migration behaviour
changes when moving from offshore to inshore waters. We conclude that this stands for
changes in the orientation behaviour of the salmon due to the increased use of olfactory
sense in the inshore area. Based on that we recommend to divide the spawning migration in
sea into three phases in relation to the different migration (orientation) behaviour in different
sea area (offshore; inshore; estuary). Parallel to this finding is the fact that the directional
geomagnetic recordings sampled during the migration of the salmon from release offshore to
entry to their home river showed that fixed direction all the way from offshore to the home
fjord area or home estuary could not explain their migration. Therefore we make that
assumption that shoreline orientation is important in finding the way once the shore has been
approached. The study setup has brought to shore many interesting recordings of new
parameters on behaviour and environmental patterns that will be examined further later.
Keywords: Atlantic salmon, migration, homing, orientation, navigation, data storage tags | no_NO |
| dc.language.iso | eng | no_NO |
| dc.publisher | ICES | no_NO |
| dc.relation.ispartofseries | ICES CM documents;2009/B:05 | |
| dc.subject | atlantic salmon | no_NO |
| dc.subject | atlantisk laks | no_NO |
| dc.subject | migration patterns | no_NO |
| dc.subject | vandringsmønster | no_NO |
| dc.title | Orientation of homing salmon (Salmo salar L.) mapped in relation to geomagnietic field. | no_NO |
| dc.type | Working paper | no_NO |
| dc.subject.nsi | VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 | no_NO |
| dc.source.pagenumber | 14 s. | no_NO |
