Dataset

NTNU River Nidelva Project

Ocean Tracking Network MeasurementOrFact Open in mapper Explore occurrences

This is the OBIS extraction of the Ocean Tracking Network and Norwegian University of Science and Technology (NTNU) NTNU River Nidelva Project, consisting of the release tagging metadata, i.e. the location and date when the tagged animal was released, and summarized detection events of tagged individuals. If readers are interested in the source dataset they may also inquire with the project PIs as listed here or on the OTN web site (https://members.oceantrack.org/project?ccode=RNP). Abstract:The purpose of the River Nidelva project is to monitor the migration of anadromous brown trout between river and fjord. Hatchery-reared sea trout are tracked in order to monitor their willingness to migrate to the ocean. Adult sea trout of wild origin are tagged and tracked for 14 months in order to map their movements between freshwater and saline habitats.

Citation: Davidsen, J.G., Arnekleiv, J.V., Koksvik, J.I. 2012. Migration of anadromous brown trout between river and fjord, Nidelva, Norway.. Accessed via the Ocean Tracking Network OBIS IPT on INSERT DATE

Published: August 27, 2025 at 11:28

URL: https://members.oceantrack.org/ipt/resource?r=otnntnuntnurivernidelvapr

Ocean Tracking Network Data Centre
Ocean Tracking Network

Jonathan Pye
Ocean Tracking Network

Jan Grimsrud Davidsen
Norwegian University of Science and Technology

Jo Vegar Arnekleiv
Norwegian University of Science and Technology

Jan Ivar Koksvik
Norwegian University of Science and Technology

47,748
occurrence records
835
measurements and facts
3
taxa
3
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 345
0.7%
maximumDepthInMeters 47,748
100.0%
minimumDepthInMeters 47,748
100.0%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
NO_DEPTH 47,748
100.0%
ON_LAND 17,570
36.8%

Measurement types

DNA derived data