Blar i Department of Biological Sciences på tittel
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Effects of environmental conditions on culturing scallop spat (Pecten maximus)
(Doctoral thesis, 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 ... -
Effects of environmental stress on mRNA expression levels of seven genes related to oxidative stress and growth in Atlantic salmon Salmo salar L. of farmed, hybrid and wild origin
(Peer reviewed; Journal article, 2012-12-05)Background: Ten generations of domestication selection has caused farmed Atlantic salmon Salmo salar L. to deviate from wild salmon in a range of traits. Each year hundreds of thousands of farmed salmon escape into the ... -
Effects of Fertilizers on the Species Composition of Bryophytes in Grazed Pastures in Rogaland, Norway
(Master thesis, 2014-06-02)This study has aimed at looking at how the species composition of bryophyte communities in grazed pastures is affected by fertilizers. Bryophyte species were collected from 25 different sites in Rogaland in Norway, of which ... -
Effects of formaldehyde and ethanol preservation on body and otoliths of Maurolicus muelleri and Benthosema glaciale
(Peer reviewed; Journal article, 1998)First of its kind, this study examines effects of preservatives on otoliths as well as on fish size and weight. Effects of 200 days of preservation in 4 % seawater formaldehyde solution and 80 % ethanol were investigated ... -
Effects of gas supersaturation on migrating Atlantic salmon smolt (Salmo salar) in Evangervatnet
(Master thesis, 2016-11-21)Total dissolved gas supersaturation (TDGS) downstream of power plants may cause harmful effects on the fauna in many rivers. The harmful effects of TDGS are known as gas bubble disease (GBD). TDGS has been proposed as one ... -
Effects of genetic complexity and time resolution in an individual-based model of mesopelagic fish with hunger and fear
(Master thesis, 2014-06-02)Many studies have shown that emotion systems are in use to direct behavior, which has also been utilized in a recent mathematical model. To investigate the general validity on the results from this model for vertical ... -
Effects of habitat enrichment and food availability on the foraging behaviour of juvenile Atlantic Cod (Gadus morhua L)
(Peer reviewed; Journal article, 2011-04-13)The environment can play an important role in shaping how an animal behaves, and how well the animal performs in a particular environment can be influenced by early experiences. The tradition of releasing captive-reared ... -
The effects of leptin and ghrelin on voluntary feed intake and appetite in Atlantic salmon Salmo salar
(Master thesis, 2013-10-01)Salmon farming has expanded dramatically in recent years, increasing the demand for both traditional feed ingredients and alternative proteins and oils. Developing new feed requires a deep understanding of appetite, feed ... -
Effects of Management on Heathland Vegetation in Western Norway
(Doctoral thesis, 2009-03-31)Aims: This synthesis of studies examines the effects of anthropogenic disturbance regimes; the traditional management practices of livestock grazing and prescribed burning, on vegetation and seed banks in coastal heathlands ... -
Effects of migrating mesopelagic fishes on the biological carbon pump
(Journal article; Peer reviewed, 2023)Mesopelagic fishes and invertebrates contribute to the biological carbon pump (BCP) through direct and indirect effects on the gravitational, diffusive, and migrant (active) fluxes. Here, we analyzed the effect of these ... -
Effects of nuisance submerged vegetation on the fauna in Norwegian rivers
(Journal article; Peer reviewed, 2021)The abundance of aquatic vegetation is increasing in rivers and lakes worldwide. The aim of this study was to find how the macrophyte Juncus bulbosus Linnaeus affects salmonids and benthic macroinvertebrates in Norwegian ... -
Effects of perceived predation risk on extra-pair mating in blue tits (Cyanistes caeruleus)
(Master thesis, 2017-10-28)Trivers’ theory of sexual conflict in parental investment has laid the groundwork for immense quantities of research, especially within the avian taxa. Although male benefits of extra-pair copulation (EPC) are argued to ... -
The effects of persistent organic pollutants (POPs) on the steroidogenesis in the mouse Y1 adrenocortical cell line
(Master thesis, 2015-10-01)The endocrine system refers to glands which secrets hormones that regulates a variety of physiological processes. The adrenal cortex is part of the endocrine hypothalamus-pituitary-adrenal axis, and produces and secretes ... -
Effects of rapid temperature changes on Atlantic salmon, Salmo salar, post-smolts
(Master thesis, 2017-06-28)Year round production of Atlantic salmon post-smolts in closed or semi-closed systems opens up for use of seawater from different depths, which will permit stocking of fish from closed containment system to the open sea ... -
Effects of reduced diameter of bag cultures on content of essential fatty acids and cell density in a continuous algal production system
(Peer reviewed; Journal article, 2011-02-16)Cell density and fatty acid (FA) content of Pavlova lutheri and Chaetoceros muelleri were analysed in a continuous algal production system (250-L bags) with reduced diameter. The cell density and FA content and composition ... -
Effects of reforestation and intensified land use on vascular plant species richness in traditionally managed hay meadows
(Peer reviewed; Journal article, 2003)In this study of 130 sites with different management we investigated whether vascular plant species richness is significantly reduced when traditionally managed hay meadows are abandoned and reforested. We also compared ... -
Effects of replacing fish meal with plant protein in diets for Atlantic cod (Gadus morhua L.)
(Doctoral thesis, 2009-09-18)In Northern Europe, interest in farming Atlantic cod Gadus morhua L. has increased steadily over the past decade stimulated by the decline in landings from fisheries, and the more predictable supply by hatchery reared ... -
Effects of sample handling and cultivation bias on the specificity of bacterial communities in keratose marine sponges
(Peer reviewed; Journal article, 2014-11-18)Complex and distinct bacterial communities inhabit marine sponges and are believed to be essential to host survival, but our present-day inability to domesticate sponge symbionts in the laboratory hinders our access to the ... -
Effects of seismic shooting on the lesser sandeel (Ammodytes marinus Raitt) - a field study with grab sampling and in situ video observations
(Master thesis, 2004)Seismic shooting with airguns has been conducted continuously in the North Sea for about 40 years. In the past two decades there has been conflicts of interest between Norwegian industrial trawlers fishing for sandeel and ...