Browsing Published externally by Issue Date
Now showing items 441-460 of 3640
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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 ... -
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 ... -
Piscivorous fish patrol krill swarms
(Journal article; Peer reviewed, 2005-09-01)Dense swarms of the krill Meganyctiphanes norvegica in the Norwegian Sea were patrolled by large, piscivorous fish, which apparently use the krill swarms as feeding grounds in their hunt for planktivores. For the krill, ... -
Politics and socio-economics of ecosystem-based management of marine resources
(Others, 2005-09-16) -
Blind dating—mate finding in planktonic copepods. III. Hydromechanical communication in Acartia tonsa
(Journal article; Peer reviewed, 2005-09-16)Mate-finding behaviour in the marine copepod Acartia tonsa was examined by video analysis. A. tonsa appears to depend on hydromechanical signals in the location of mates, detected at distances of up to 5 or 7 mm. Series ... -
A global movement toward an ecosystem approach to management of marine resources
(Others, 2005-09-16) -
Blind dating—mate finding in planktonic copepods. II. The pheromone cloud of Pseudocalanus elongatus
(Journal article; Peer reviewed, 2005-09-16)Receptive females of Pseudocalanus elongatus, like many other planktonic copepods, produce pheromones to signal their presence and position to males, and thus enhance the rate of mate encounter. By means of 3D video ... -
Blind dating—mate finding in planktonic copepods. I. Tracking the pheromone trail of Centropages typicus
(Journal article; Peer reviewed, 2005-09-16)Mate-finding behaviour in the marine copepod Centropages typicus was investigated by 3-dimensional video analysis. Females leave a chemical trail in their wake and a male intercepting a fresh trail initiates a characteristic ... -
Population dynamics of cod Gadus morhua in the North Sea region: biological density-dependent and climatic density-independent effects
(Journal article; Peer reviewed, 2005-11-04)Through the statistical modeling of monitoring data, we assess the ecological interlinkages between cod Gadus morhua L. in the North Sea, Skagerrak and Kattegat—regions which typically have been considered separate management ... -
Efficacy of orally administered flumequine in the treatment of vibriosis caused by Listonella anguillarum in Atlantic cod Gadus morhua
(Journal article; Peer reviewed, 2005-11-09)The efficacy of orally administered flumequine in the treatment of experimentally induced vibriosis in Atlantic cod Gadus morhua was investigated. Cod (mean ± SD, 120 ± 30 g) were randomly distributed to twelve tanks and ... -
North Sea herring population structure revealed by microsatellite analysis
(Journal article; Peer reviewed, 2005-11-21)The Atlantic herring Clupea harengus has played a pivotal role in the formulation of ideas relating to population structuring in marine fishes, yet considerable uncertainty remains as to the extent to which phenotypic ... -
Ocean temperature oscillations enable reappearance of blue mussels Mytilus edulis in Svalbard after a 1000 year absence
(Journal article; Peer reviewed, 2005-11-21)We report the first observations of settled blue mussels Mytilus edulis L. in the high Arctic archipelago of Svalbard for the first time since the Viking Age. A scattered population was discovered at a single site at the ... -
Bridging the gap between aquatic and terrestrial ecology
(Journal article; Peer reviewed, 2005-12-08) -
UV transmission in Norwegian marine waters: controlling factors and possible effects on primary production and vertical distribution of phytoplankton
(Journal article; Peer reviewed, 2005-12-23)We investigated the ultraviolet radiation (UVR) transmission properties of Norwegian oceanic, coastal and fjord waters, and how they influence the primary production and vertical distribution of phytoplankton. Values of ... -
Viral encephalopathy and retinopathy (VER) in Atlantic salmon Salmo salar after intraperitoneal challenge with a nodavirus from Atlantic halibut Hippoglossus hippoglossus
(Journal article; Peer reviewed, 2005-12-30)Homogenate of tissue from juveniles of Atlantic halibut Hippoglossus hippoglossus suffering from viral encephalopathy and retinopathy (VER) was used to challenge smolt of Atlantic salmon Salmo salar with an initial average ... -
Systematic bias in estimates of reproductive potential of an Atlantic cod (Gadus morhua) stock: implications for stock–recruit theory and management
(Journal article; Peer reviewed, 2006)Stock–recruit relationships that use spawning stock biomass (SSB) to represent reproductive potential assume that the proportion of SSB composed of females and the relative fecundity (number of eggs produced per unit ... -
Calibrating split beam transducers at depth
(Journal article; Peer reviewed, 2006) -
Parametric acoustic array and P. J. Westervelt: A tribute
(Others, 2006)