Now showing items 231-240 of 790
Environmental contaminants activate human and polar bear (Ursus maritimus) pregnane X receptors (PXR, NR1I2) differently
Background Many persistent organic pollutants (POPs) accumulate readily in polar bears because of their position as apex predators in Arctic food webs. The pregnane X receptor (PXR, formally NR1I2, here proposed to be named ...
Estimating Fish Densities from Single Fish Echo Traces
(Bentham Open, 2009)
Estimating mean fish density per unit area has been done by counting single fish echo traces with a split beam echo sounder system in the open sea. A data program has been written that scans the acoustic signals for echo ...
Spatial Distribution of Seatrout Spawning and the Effects on Juvenile Abundance in River Teigdalselva, Western-Norway
(The University of Bergen, 2011-06-01)
The spatial distribution of seatrout spawning-grounds, microhabitat features and the resulting juvenile distribution were observed in a typical Western-Norwegian river. A total of 1870 squares within 187 cross-transects ...
Giving eyes to pelagic trawls: Acoustic and optical techniques measure behaviour, species, and sizes of fish in situ
(The University of Bergen, 2013-11-26)
Trawling, towing a cone-shaped net behind a moving boat, is a widespread fishing method both in commercial fisheries and to collect fish for scientific investigations. It combines filtering effect with herding behaviour ...
Effects of environmental conditions on culturing scallop spat (Pecten maximus)
(The University of Bergen, 2005-09-22)
The great scallop, Pecten maximus, is a valuable bivalve species attractive for human consumption. Scallop aquaculture is increasing, but availability of spat is a bottleneck to the development of a viable culture industry ...
Hormonal and Neuropeptide Mechanisms of Appetite Control in Atlantic Salmon
(The University of Bergen, 2010-06-25)
Breeding system, insect flower visitation, and floral traits of two alpine cerastium species in Norway
(The Institute of Arctic and Alpine Research, 1999)
The pollination and reproductive ecology of Saxifraga stellaris was investigated in alpine southwest Norway. A breeding system analysis, with performance of controlled crosses, revealed that S. stellaris is self-compatible ...
Interaction patterns and specialization in a local and national Norwegian pollination network
(The University of Bergen, 2014-06-02)
Pollination is an important ecosystem service that is threatened and not very well studied in Norway. Interaction patterns and specialization is one important aspect of pollination that needs to be studied to better ...
Physiological and molecular mechanisms of oocyte hydration in an evolutionary old teleost, Atlantic herring (Clupea harengus)
(The University of Bergen, 2008-04-11)
This work investigated physiological and molecular mechanisms of oocyte hydration in Atlantic herring (Clupea harengus). Both inorganic and organic solutes were found to be important solutes involved in the hydration ...
Ballan wrasse (Labrus bergylta) predation on hatchery reared scallop (Pecten maximus) spat
(The University of Bergen, 2005)
Sea ranching of the great scallop (Pecten maximus) may have a high potential for future aquaculture in Norway. The edible crab (Cancer pagurus) and starfish (Asterias rubens) have been identified as the major predators, ...