Blar i Institutt for biologi på emneord "NATURAL SCIENCES: Biology"
Viser treff 1-17 av 17
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Behavioural effects on environmental pollution in threespine stickleback Gasterosteus aculeatus L
(Doctoral thesis, 2003)The aims of this study were to investigate the effects of known environmental contaminants on defined behavioural variables in fish, and to discuss properties of these behavioural traits that make them useful as potential ... -
Causes and consequences of individual variation in fitness-related traits in house sparrows.
(Doctoral thesis, 2002)Human activity has caused an increase in the fragmentation of natural habitats, especially during the last couple of centuries. This means that populations of wild species are split into smaller sub-populations often ... -
Coastal heath vegetation in central Norway; recent past, present state and future possibilities
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:76, Doctoral thesis, 2004) -
Cultivation of Herbs and Medicinal Plants in Norway - Essential Oil Production and Quality Control
(Doctoral thesis, 2003)Essential oils (EO) are plant secondary metabolites that are known for their fragrance and food flavour properties. They consist of a complex mixture of mono- and sesquiterpenes, phenyl propanoids and oxygenated compounds. ... -
Cytochrome P4501A (CYP1A) induction and DNA adducts as biomarkers for organic pollution in the natural environment.: Evaluation and validation in bioassays and in a field laboratory experiment
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:85, Doctoral thesis, 2004)Due to the serious ecological consequences associated with exposure to environmental pollutants, considerable attention has been focused on the applicability of early warning signals, or biomarkers in environmental research ... -
Effects of climatic change on the growth of dominating tree species along major environmental gradients.
(Doctoral thesis, 2002)This thesis deals with effects of climate on tree growth of the dominating conifer species, Picea abies (L) Karst. (Norway spruce) and Pinus sylvestris L (Scots pine), in central Norway and Fennoscandia. Both species are ... -
Environmental effects on lipid nutrition of farmed Atlantic salmon (Salmo salar L.) parr and smolts
(Doctoral thesis, 2003)The aim of this study was to investigate the effects of water temperature and salinity on lipid nutrition of farmed Atlantic salmon (Salmo salar L.) parr and smolt. Salmon parr were held at low water temperature (2°C) for ... -
Functional characterisation of olfactory receptor neurone types in heliothine moths: Identification of molecular receptive ranges by the use of single cell recordings linked to gas chromatography and mass spectrometry
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:73, Doctoral thesis, 2005)When the study of this thesis was initiated, hardly any work had been carried out on how plant odour information was encoded by the olfactory RNs in heliothine moths. The method of gas chromatography linked to single cell ... -
Levels and effects of persistent organic pollutants (POPs) in seabirds. Retinoids and a-tocopherol - potential biomarkers of POPs in birds?
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:6, Doctoral thesis, 2006)In the present thesis, levels of polychlorinated biphenyls (PCBs), some chosen organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD) were analyzed by gas chromatography ... -
Life history characteristics and genetic variation in an expanding species, Pogonatum dentatum.
(Doctoral thesis, 2003)The main objective of this thesis is to get a better understanding of the processes behind species range expansions and the consequences for variation in life history characters and genetic variation. The thesis focuses ... -
Life history consequences of environmental variation along ecological gradients in northern ungulates
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:15, Doctoral thesis, 2006)Temporal and spatial variation in the environment can influence the performance of individuals in wild ungulate populations. Of particular importance is an understanding of the mechanisms that shape variation in individual ... -
Male dimorphism and reproductive biology in corkwing wrasse (Symphodus melops L.)
(Doctoral thesis, 2001)The scope of this thesis was to study male dimorphism and reproductive biology in corkwing wrasse (Symphodus melops L.). The most common male morph in corkwing wrasse is distinctively blue and green (territorial males), ... -
Olfactory receptor neurones specified for the same odorants in three related heliothine species (Helicoverpa armigera, Helicoverpa assulta and Heliothis virescens).: Electrophysiology linked to gas chromatography and mass spectrometry.
(Doctoral thesis, 2003)Hvordan lærer og husker vi dufter? Hvordan skiller vi dem fra hverandre? Det finnes liten kunnskap om hvilke duftsubstanser ulike lukteceller er utviklet for. I dag er gener for luktereseptorer identifisert i mange ... -
Organochlorine pollutants in grey seal (Halichoerus grypus) pups and their impact on plasma thyroid hormone and vitamin A concentrations
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:101, Doctoral thesis, 2005)Studies on laboratory animals suggest that developing and newborn mammals are more vulnerable than the adults with respect to the harmful effects of organochlorine (OC) pollutants such polychlorinated biphenyls (PCBs) and ... -
Reproductive strategies in Scandinavian brown bears
(Doctoral thesis, 2003)Denne avhandlingen tar for seg noen sentrale aspekt ved reproduktive strategier hos brunbjørn. Første del tar for seg strategier for foreldreomsorg og hvordan disse påvirker størrelsen og overlevelsen på avkommet. Deretter ... -
Sex roles and reproductive behaviour in gobies and guppies : a female perspective
(Doctoral thesis, 2003)This thesis focuses on reproductive dynamics, behaviour and selection from a female perspective. The aim was to explore variation in sex roles and potential for selection on females, as well as the selective forces working ... -
Studies on antifreeze proteins
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:98, Doctoral thesis, 2005)Antifreeze proteins (AFPs) are produced by a variety of so-called freeze-avoiding animals, ectotherms that adaptively allow their body fluids to supercool as a response to subfreezing temperatures in their environment. ...