Browsing Brage IMR by Subject "jellyfish"
Now showing items 1-8 of 8
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Acoustic observations of jellyfish in the Namibian Benguela
(Journal article; Peer reviewed, 2001-01-26)Multi-frequency acoustic data (18, 38 and 120 kHz) were collected in conjunction with pelagic trawl sampling for gelatinous macrozooplankton during a cruise to the Namibian Benguela in September 1999. Sampling focused ... -
Biomass of Scyphozoan Jellyfish, and Its Spatial Association with 0-Group Fish in the Barents Sea
(Journal article; Peer reviewed, 2012-03-22)An 0-group fish survey is conducted annually in the Barents Sea in order to estimate fish population abundance. Data on jellyfish by-catch have been recorded since 1980, although this dataset has never been analysed. In ... -
Brennmaneter
(Havforskningsnytt, Working paper, 2007) -
Fra sviende problem til ressurs : How to turn a burning problem into a resource
(Havforskningsnytt;Nr. 1 - 2010, Working paper, 2010)The teeming jellyfish in some Norwegian fjords put many people off taking a refreshing summer dip. In Asia, meanwhile, far larger jellyfish invasions have caused serious environmental problems. However, jellyfish can also ... -
Maneter – fra pest til mage... [Anders Jelmert uttaler seg om maneter]
(Others, 2010-07-19) -
Pinging down the food web: multi-frequency acoustic discrimination of jellyfish and fish
(ICES CM Documents;2004/R:6, Working paper, 2004)Jellyfish are gaining increasing prominence in many pelagic marine ecosystems worldwide. It has been argued that jellyfish-dominated communities will be the end-point in ecosystems perturbed by high fishing effort, and ... -
Towards the acoustic estimation of jellyfish abundance
(Journal article; Peer reviewed, 2005-06-23)Acoustic target strengths (TSs) of the 2 most common large medusae, Chrysaora hysoscella and Aequorea aequorea, in the northern Benguela (off Namibia) have previously been estimated (at 18, 38 and 120 kHz) from acoustic ... -
Why do jellyfish bloom in Norwegian waters and what can be done to recover the ecosystems in the North Sea and on the Norwegian coast?
(Report, 2015-11-06)The ecosystems with their relationships between fish species and stocks, have been established by evolution for millions of years, but only during the last 50 years, the ecosystems in the North Sea and along the Norwegian ...