Browsing Institutt for biologi by Title
Now showing items 1857-1876 of 2516
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Rearing water treatment induces microbial selection influencing the microbiota and pathogen associated transcripts of cod (Gadus morhua) larvae.
(Journal article; Peer reviewed, 2018)We have previously shown that K-selection and microbial stability in the rearing water increases survival and growth of Atlantic cod (Gadus morhua) larvae, and that recirculating aquaculture systems (RAS) are compatible ... -
Recent immigrants alter the quantitative genetic architecture of paternity in song sparrows.
(Peer reviewed; Journal article, 2020)Quantifying additive genetic variances and cross-sex covariances in reproductive traits, and identifying processes that shape and maintain such (co)variances, is central to understanding the evolutionary dynamics of ... -
Receptor-mediated toxicity of the chemicals extracted and migrated from plastics.
(Master thesis, 2023)Plast er tilstede i alle aspekter av dagliglivet. Plast er komplekse blandinger av kjemikalier som enten er petroleumsbaserte eller biobaserte. Flere studier rapporterte virkningene og truslene fra plastbruk på det ... -
Recommendations for quantitative uncertainty consideration in ecology and evolution
(Peer reviewed; Journal article, 2023)Ecological and evolutionary studies are currently failing to achieve complete and consistent reporting of model-related uncertainty. We identify three key barriers – a focus on parameter-related uncertainty, obscure ... -
Reconstruction and Registration of three Bilateral Protocerebral Neurons in the Standard Brain Atlas of the Moth Heliothis virescens
(Master thesis, 2013)Insect behaviour is tightly connected to their ability to detect important sensory information from their environment. The tobacco moth Heliothis virescens moth follows airborne stimuli to acquire partners, food and suitable ... -
Recovery, body mass and buoyancy: a detailed analysis of foraging dive cycles in the European shag
(Peer reviewed; Journal article, 2021)Foraging dives in birds and mammals involve complex physiological and behavioural adaptations to cope with the breaks in normal respiration. Optimal dive strategies should maximize the proportion of time spent under water ... -
Recruitment dynamics of Periphylla periphylla in the Trondheimsfjord
(Master thesis, 2013)Periphylla periphylla (Péron and Lesueur 1809) is a deep sea coronate scyphomedusa distributed in all oceans of the world, where it is normally found in low abundances. Over the last decades, however, it has established ... -
Red and white chinook salmon (Oncorhynchus tshawytscha): Differences in the transcriptome profile of muscle, liver, and pylorus
(Journal article; Peer reviewed, 2020)Astaxanthin (Ax), the main carotenoid responsible for the distinct red flesh color in salmonids (Oncorhynchus, Salvelinus, Salmo, and Parahucho), is added to the diet of farmed fish at a substantial cost. Despite the great ... -
Red-listed vascular Plant Species in Sub-Alpine and Alpine Landscapes: How does Land-use affect their Distribution?
(Master thesis, 2012)A major threat to red-listed vascular plant species in semi-natural habitats is land use change. In this study the effect of land use on the distribution of red-listed vascular plant species was investigated in a protected ... -
Redefining the oceanic distribution of Atlantic salmon
(Peer reviewed; Journal article, 2021)Determining the mechanisms driving range-wide reductions in Atlantic salmon marine survival is hindered by an insufcient understanding of their oceanic ecology and distribution. We attached 204 pop-up satellite archival ... -
Reduced physiological plasticity in a fish adapted to stable temperatures
(Peer reviewed; Journal article, 2022)Plasticity can allow organisms to maintain consistent performance across a wide range of environmental conditions. However, it remains largely unknown how costly plasticity is and whether a trade-off exists between plasticity ... -
Reduced sexual size dimorphism in a pipefish population where males do not prefer larger females
(Journal article; Peer reviewed, 2019)Within a species' distribution, populations are often exposed to diverse environ‐ments and may thus experience different sources of both natural and sexual selec‐tion. These differences are likely to impact the balance ... -
Regulation in Atlantic salmon (Salmo salar): The interaction between habitat and density
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:138, Doctoral thesis, 2011) -
Regulation of reproductive processes with dynamic energy budgets
(Journal article; Peer reviewed, 2019)Linking organismal‐level processes to underlying suborganismal mechanisms at the molecular, cellular and organ level constitutes a major challenge for predictive ecological risk assessments. This challenge can be addressed ... -
Reindeer turning maritime: Ice-locked tundra triggers changes in dietary niche utilization
(Journal article; Peer reviewed, 2019)The rapid warming of the Arctic may not only alter species’ abundances and distributions, but likely also the trophic interactions within and between ecosystems. On the high‐arctic tundra, extreme warm spells and associated ... -
Reject the odd egg: Egg recognition mechanisms in parrotbills
(Journal article; Peer reviewed, 2014)Studies of the behavior of animals when confronted with tasks differing in complexity can improve our understanding of animal cognition and learning mechanisms. Coevolutionary interactions between brood parasites and their ... -
The relationship between daily behavior, hormones, and a color dimorphism in a seabird under natural continuous light
(Journal article; Peer reviewed, 2021)The predictable oscillation between the light of day and the dark of night across the diel cycle is a powerful selective force that has resulted in anticipatory mechanisms in nearly all taxa. At polar latitude, however, ... -
Relationships Between Environmental and Biological Variables, Plasma Clinical-Chemical Parameters and Persistent Organic Pollutants (POPs) in Polar Bears (Ursus maritimus) from Svalbard, Norway
(Master thesis, 2015)Few previous studies have reported on levels of clinical-chemical parameters (CCPs) in polar bears (Ursus maritimus), and to date, only one study has investigated levels of CCPs and how they are related to persistent organic ... -
Relationships Between Persistent Organic Pollutants (POPs) and Plasma Clinical-Chemical Parameters in Polar Bears (Ursus maritimus) from Svalbard, Norway.
(Master thesis, 2012)In the present study, clinical-chemical parameters in relationship to persistent organic pollutants (POPs) were investigated in plasma samples from polar bears (Ursus maritimus) captured at Svalbard in 2007. The clinical-chemical ... -
Relationships between POPs, biometrics and circulating steroids in male polar bears (Ursus maritimus) from Svalbard
(Journal article; Peer reviewed, 2017)The aim of this study was to determine the effects of persistent organic pollutants (POPs) and biometric variables on circulating levels of steroid hormones (androgens, estrogens and progestagens) in male polar bears (Ursus ...