Browsing Brage IMR by Journals "Marine Ecology Progress Series"
Now showing items 1-20 of 200
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Abundance, maturity and growth of the krill species Thysanoessa inermis and T. longicaudata the Barents Sea
(Journal article; Peer reviewed, 1996-12-05)Thysanoessa inermis and T. longicaudata were the dominant krill species observed in the western and central Barents Sea between 1984 and 1992. Both species are typically boreal and subarctic, and were found in very low ... -
Acoustic observations of dusky dolphins Lagenorhynchus obscurus hunting Cape horse mackerel Trachurus capensis off Namibia
(Journal article; Peer reviewed, 2011-05-16)Predator–prey interactions of mammals and their fish prey in marine ecosystems are rarely identified and recorded. We document for the first time the underwater behaviour of hunting dusky dolphins Lagenorhynchus obscurus ... -
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 ... -
Activity patterns of wild European lobster Homarus gammarus in coastal marine reserves: implications for future reserve design
(Journal article; Peer reviewed, 2011-05-16)European lobster Homarus gammarus in Norway has been in decline over the last 30 to 40 yr, and the species is currently red listed according to International Union for Conservation of Nature criteria. In 2006, experimental ... -
Adaptive mass formations in fish shoals founded in conflicting motivation
(Journal article; Peer reviewed, 2008-04-21)The organising principles behind adaptive collective formations in animals are not well understood. Here we document that persistent vertical hourglass formations occur during the critical spawning period in huge shoals ... -
Analysing multiple time series and extending significance testing in wavelet analysis
(Journal article; Peer reviewed, 2008-05-05)In nature, non-stationarity is rather typical, but the number of statistical tools allowing for non-stationarity remains rather limited. Wavelet analysis is such a tool allowing for non-stationarity but the lack of an ... -
Antarctic krill Euphausia superba: spatial distribution, abundance, and management of fisheries in a changing climate
(Peer reviewed; Journal article, 2021)Antarctic krill Euphausia superba, a keystone species in the Southern Ocean, is highly relevant for studying effects of climate-related shifts on management systems. Krill provides a key link between primary producers and ... -
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 ... -
Application of evolutionary theory to fisheries science and stock assessment-management
(Others, 2000-12-08) -
Applications of sensory biology in marine ecology and aquaculture
(Others, 2005-02-18) -
Assessing the importance of zooplankton sampling patterns with an ecosystem model
(Peer reviewed; Journal article, 2021)The copepod Calanus finmarchicus is the dominant species of mesozooplankton in the Norwegian Sea and an important food source for multiple commercially exploited pelagic fish stocks. In addition to the patchy distribution ... -
Asynchronized spawning responses of small pelaigic fish to a short-term enviromental change
(Peer reviewed; Journal article, 2022)We provide substantial evidence on how short-term changes in environmental conditions activate and deactivate spawning activities in small pelagic fishes. An ichthyoplankton survey was conducted along the southernmost part ... -
Atlantic observation of Calanus marshallae (Copepoda; Calanoida)
(Journal article; Peer reviewed, 1998-05-28)An observation of Calanus marshallae Frost, 1974, on the Atlantic side of the Polar Ocean is reported. Copepods were identified by comparing nucleotide sequences of mitochondrial 16S ribosomal RNA with a previously reported ... -
‘Await’ in the pelagic: dynamic trade-off between reproduction and survival within a herring school splitting vertically during spawning
(Journal article; Peer reviewed, 2000-10-19)Spatio-temporal aspects of spawning behaviour were investigated in a single school of Norwegian spring-spawning herring Clupea harengus, and are explained by changes in the relative importance of reproduction, predation ... -
Baleen whale distributions and prey associations in the Barents Sea
(Journal article; Peer reviewed, 2011-03-28)We investigated the spatial associations between minke Balaenoptera acutorostrata, fin B. physalus and humpback Megaptera novaeangliae whales and their prey in the Barents Sea in late summer of 2003 to 2007. During these ... -
Behavior of individual mesopelagic fish in acoustic scattering layers of Norwegian fjords
(Journal article; Peer reviewed, 2008-05-22)Mesopelagic acoustic scattering layers (SLs) in 2 fjords were studied from a stationary research vessel. Diel vertical movements of SLs were assessed by hull-mounted transducers, while in situ behavior of individuals ... -
Behaviour and habitat use of first-time migrant Arctic charr: novel insights from a subarctic marine area
(Peer reviewed; Journal article, 2023)Anadromous Arctic charr Salvelinus alpinus is a cold-adapted salmonid that is vulnerable to climate warming and anthropogenic activities including salmon farming, hydropower regulation, and pollution, which poses a ... -
Benefits of threshold strategies and age-selective harvesting in a fluctuating fish stock of Norwegian spring spawning herring Clupea harengus
(Journal article; Peer reviewed, 2005-08-15)The current state of the world’s fisheries resources requires further investigation into the means and methods for sustainable use of fish stocks. In this study, I assess the performance of different harvesting strategies ... -
Bernard Megrey: pioneer of Comparative Marine Ecosystem analyses
(Journal article; Peer reviewed, 2012-07-12)The MEPS Theme Section on ‘Comparative Analysis of Marine Fisheries Production’ is dedicated to Dr. Bernard Megrey. Dr. Megrey was well known for comparative studies of ecosystems, but his contributions to science were ... -
Best practices to mitigate seabird bycatch in longline, trawl and gillnet fisheries—efficiency and practical applicability
(Journal article; Peer reviewed, 2011-08-22)Growing concerns have been raised about incidental capture of seabirds in various fisheries. Here, studies testing measures to prevent seabird bycatch in longline, trawl and gillnet fisheries are reviewed in order to ...