Now showing items 1-10 of 586
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 ...
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 ...
Hormonal and Neuropeptide Mechanisms of Appetite Control in Atlantic Salmon
(The University of Bergen, 2010-06-25)
Treeline and vegetation dynamics in response to environmental changes in Nepal, the central Himalaya
(The University of Bergen, 2013-05-31)
Aims: To describe and evaluate patterns of vegetation response to ongoing environmental changes across climate-limited (alpine treeline ecotone) and humanmodified (temperate Himalayan oak forests) ecosystems in Nepal, ...
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 ...
Last-century vegetational changes in northern Europe. Characterisation, causes, and consequences
(The University of Bergen, 2011-11-04)
In the face of recent changes in environmental conditions and climate, longterm studies provide important insights into patterns and processes of vegetational change. In northern Europe, however, long-term studies are ...