Blar i Institutt for biologi på tittel
Viser treff 1867-1886 av 2515
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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 ... -
Relative performance of salmonid phenotypes across environments and competitive intensities
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:132, Doctoral thesis, 2011) -
Relevance of nano- and microplastics for freshwater ecosystems: a critical review
(Journal article; Peer reviewed, 2018)The current paper critically reviews the state-of-the-science on (1) microplastics (MP) types and particle concentrations in freshwater ecosystems, (2) MP and nanoplastics (NP) uptake and tissue translocation, (3) MP/NP-induced ... -
Remote sensing of marine environment: Applied surveillance with focus on optical properties of phytoplankton, coloured organic matter and suspended matter
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:178, Doctoral thesis, 2009)Light from the Sun reaching the Earth and sea surface contains the entire wavelength band from ultraviolet (180-400 nm), visible (400-700 nm) and far into the infrared and radio wave region (>700 nm). The light penetrates ... -
Remote Sensing of the Tautra Ridge: An Overview of the World’s Shallowest Cold-Water Coral Reefs
(Peer reviewed; Journal article, 2022)On the Tautra Ridge – a 39-100 m deep morainic sill located in the middle of the Trondheimsfjord, Norway – some of the world’s shallowest known occurrences of the scleractinian cold-water coral (CWC) Desmophyllum pertusum ... -
Repeatability and Flexibility in the Migration Strategies of an Arctic Seabird
(Master thesis, 2016)The strategy of migration has evolved independently in many animal groups, but it is most widely and well developed in birds. Migrating species are expected to be severely affected by human induces climate change, and the ... -
Repeatability in isotopic signatures is linked to consistent individual migration strategies and individual specialization in a long-distance migratory seabird
(Master thesis, 2018)Animal populations can consist of specialized individuals with different foraging strategies. There could be several advantages for specialized individuals, such as higher foraging efficiency, breeding success and survival. ... -
Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences
(Journal article; Peer reviewed, 2020)Consistent individual differences in behavior have been demonstrated for many animals, but there are few studies of consequences of such repeated behavior in the wild. We tested consistency in migration timing to and from ... -
Repeatable Territorial Aggression in a Neotropical Poison Frog
(Peer reviewed; Journal article, 2022)Intra-specific aggressive interactions play a prominent role in the life of many animals. While studies have found evidence for repeatability in boldness, activity, and exploration in amphibians, we know relatively little ... -
Representation of pheromones, interspecific signals, and plant odors in higher olfactory centers; mapping physiologically identified antennal-lobe projection neurons in the male heliothine moth
(Journal article; Peer reviewed, 2014)The arrangement of anatomically separated systems for information about general and pheromone odorants is well documented at the initial levels of the olfactory pathway both in vertebrates and insects. In the primary ... -
Reproductive and migratory challenges inflicted on migrant brown trout ( Salmo trutta L. ) in a heavily modified river
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:136, Doctoral thesis, 2012)