Viser treff 1-10 av 47
An effective method for the recapture of escaped farmed salmon
(Journal article; Peer reviewed, 2011-04-04)
The search for effective strategies to prevent and mitigate accidental releases of aquaculture fishes is on-going. To test a new recapture strategy and evaluate the individual dispersal behaviour of escaped farmed Atlantic ...
Støy 50 km fra skyting [Egil Ona uttaler seg om seismikkskyting]
Fortsatt uro over NVG-silda [Harald Loeng uttaler seg om akustiske målinger]
Target strength and tilt angle distribution of lesser sandeel (Ammodytes marinus)
(Master thesis, 2011-08-09)
Lesser sandeel (Ammodytes marinus) was investigated acoustically as well as using video camera in two field experiments in 2007 and one in 2008, both during North Sea sandeel surveys by the Norwegian research vessel “Johan ...
Presisjon ved akustisk mengdeberegning av fisk
(Master thesis, 1979)
Ocean Acoustic Waveguide Remote Sensing (OAWRS) of marine ecosystems
(Journal article; Peer reviewed, 2009-12-03)
Ocean Acoustic Waveguide Remote Sensing (OAWRS) has recently been shown to be capable of instantaneously imaging and continuously monitoring fish populations over continental shelf-scale areas, covering thousands of km2. ...
Antarctic krill swarm characteristics in the Southeast Atlantic sector of the Southern Ocean
(Journal article; Peer reviewed, 2012-09-28)
Knowledge about swarm dynamics and underlying causes is essential to understand the ecology and distribution of Antarctic krill Euphausia superba. We collected acoustic data and key environmental data continuously across ...
Observations of cod reaction to trawling noise
(Working paper, 1988-04)
Observations made from a stationary echo sounder, passed by a trawling vessel, clearly demonstrate the flight reaction of cod as a response to the noise from the vessel. Horizontal dispersal and downward swimming has been ...
Influence of Different Factors on Abundance Estimates Obtained from Simultaneous Sonar and Echo Sounder Recordings
(Journal article; Peer reviewed, 2011-12-28)
Use of horizontal guided sonar in addition to vertical echo sounder may improve biomass estimation of pelagic fish schooling near the surface. But proportions of horizontal guided sonar to vertical echo integration estimates ...