Browsing Institutt for biologi by Title
Now showing items 721-740 of 2596
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Effects of Climate and Animal Density on Adult Sex Ratio Variation in a Large Herbivore
(Master thesis, 2014)Adult sex ratio is often biased in natural populations, and its variation is known to influence different demographic components at the population level. The causes of variation in adult sex ratio remain, however, poorly ... -
Effects of climate change and diminishing sea ice on Common Eider breeding distribution in Kongsfjorden, Svalbard
(Master thesis, 2019)Jordas polare strøk varmes opp dobbelt så raskt som resten av kloden, og en av de største truslene knyttet til global oppvarming er nedsmelting av isen i polområdene. Verdens sjøfuglbestander synker i antall, og et stort ... -
Effects of Climate on Chick Growth in the Black-legged Kittiwake (Rissa tridactyla)
(Master thesis, 2015)Seabirds are declining worldwide as a result of anthropogenic influences, primarily through climate change affecting the food availability. One of the declining species is the black-legged kittiwake (Rissa tridactyla), ... -
EFFECTS OF CLIMATE ON SEASONAL EVENTS IN PERENNIAL HERBS IN TWO EUROPEAN BOTANICAL GARDENS.
(Master thesis, 2023)ABSTRAKT Plantefenologi er vitenskapen om hvordan sesongsykluser påvirkes av klima og værendringer. For å bestemme forskjellen i arter på forskjellige steder eller i skiftende klimatiske forhold, må visse fenologiske ... -
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 ... -
Effects of complex organohalogen contaminant mixtures on thyroid hormone homeostasis in selected arctic marine mammals
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:271, Doctoral thesis, 2011) -
Effects of copepod density and water exchange on the egg production of Acartia tonsa Dana (Copepoda: Calanoida) feeding on Rhodomonas baltica
(Master thesis, 2013)In this study, the objective was to investigate the effect of different copepod densities and the water exchange rate day-1 on the egg production of Acartia tonsa feeding on Rhodomonas baltica. It was a main task to find ... -
Effects of Crude Oil Water Accommodated Fractions (WAF) on the Escape Behaviour in Calanus finmarchicus Gunnerus (Copepoda)
(Master thesis, 2012)SammendragDen dominerende planktonorganismen i Atlanterhavet og Barentshavet er den calanoide kopepoden Calanus finmarchicus. Den er en nøkkelart i den marine næringskjeden, og har evnen til å lagre store mengder fett, som ... -
Effects of density, species interactions, and environmental stochasticity on the dynamics of British bird communities
(Journal article; Peer reviewed, 2022)Our knowledge of the factors affecting species abundances is mainly based on time-series analyses of a few well-studied species at single or few localities, but we know little about whether results from such analyses can ... -
Effects of dietary glutamate and succinate on growth performance and mitochondrial respiration in heart and liver of Atlantic salmon (Salmo salar) smolts
(Journal article; Peer reviewed, 2019)The smolt stage of salmon has challenges in reaching adequate growth rates due to the changing environmental conditions at sea. Therefore, it is necessary to provide adequate diets to achieve sufficient growth. This study ... -
Effects of different dietary ingredients on the immune responses and antioxidant status in Atlantic salmon (Salmo salar L.): possible nutriomics approaches
(Doctoral theses at NTNU;2020:123, Doctoral thesis, 2020)The importance of salmon feeds Farming of Atlantic salmon (Salmo salar L.) is a first-rank aquaculture industry in Norway, accounting for a production of over 1.2 million tons per year. Dependency on fish meal has been ... -
Effects of different live feed on ballan wrasse (Labrus bergylta) larval hepatocyte and enterocyte development
(Master thesis, 2015)Abstract Salmon lice infestations are one of the biggest challenges for Norwegian salmon farming today. Delousing agents have been the solution to these infestations in the past, but overuse and wrong dosages have caused ... -
Effects of different live feed on larval growth and development in ballan wrasse (Labrus bergylta Ascanius, 1767): - A metabolomics study
(Master thesis, 2012)The use of ballan wrasse (Labrus bergylta) for the treatment of salmon lice (Lepeophtheirus samonis) in salmon farming is rapidly growing due to resistance to chemical treatments. The demand for high quality and large ... -
Effects of different live feeding regimes on the development and lipid composition of ballan wrasse (Labrus bergylta) larvae
(Master thesis, 2024)Lakselus (Lepeophtheirus salmonis) utgjør en av de største utfordringene for utvidelsen av norsk lakseoppdrett, og påvirker produksjonen, fiskevelferden og villaksbestandene negativt. Effektiviteten til både kjemiske og ... -
Effects of different water treatments on microbial communities when startfeeding European lobster (Homarus gammarus)
(Master thesis, 2014)The challenge with poorly performing larvae and high mortality in replicate tanks is a bottleneck in aquaculture. The main objective of this thesis has been to reveal if differences in performance and survival of the reared ... -
Effects of Ecotourism Benefits on Local Support for Conservation - A Case Study of Local Perceptions of Inlay Lake, Myanmar
(Master thesis, 2018)Conservation efforts by the local people are increasingly seemed as important with respect to the protected area management of developing countries. Such practices often involve ecotourism through income generating activities. ... -
Effects of elevated carbon dioxide on male and female behavioural lateralization in a temperate goby
(Journal article; Peer reviewed, 2018)Behavioural abnormality in fishes has been proposed as a significant consequence of the increasing levels of carbon dioxide occurring in the oceans. Negative effects of elevated CO2 have been reported for behaviours such ... -
Effects of elevated dissolved carbon dioxide and perfluorooctane sulfonic acid, given singly and in combination, on steroidogenic and biotransformation pathways of atlantic cod
(Journal article; Peer reviewed, 2014)In the aquatic environments, the predicted changes in water temperature, pO2 and pCO2 could result in hypercapnic and hypoxic conditions for aquatic animals. These conditions are thought to affect several basic cellular ... -
Effects of elevated water temperatures and microalgae diet on prosome size, fat sac development, egg production and hatching success in Calanus finmarchicus.
(Master thesis, 2021)Raudåta (Calanus finmarchicus, Gunnerus) er en nøkkelart i Barents- og Norskehavet på grunn av sin tallrikhet og betydning knyttet til energioverføring mellom primærprodusenter og kommersielle fiskearter. Slik som mange ... -
Effects of energetic state and social environment on individual foraging strategies in a population of house sparrows, Passer domesticus
(Master thesis, 2023)Hvordan variasjon i adferd blant individer som er del av samme populasjon or er utsatt for de samme seleksjonstrykkene blir vedlikeholdt, er ennå uvisst blant evolusjonsbiologer, siden de forventes å ha utviklet de samme ...