Blar i Department of Biological Sciences på tittel
Viser treff 1232-1251 av 2232
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Life-history implications of the allometric scaling of growth
(Peer reviewed; Journal article, 2014-10-21)Several phenomenological descriptions, such as the von Bertalanffy growth model, have been widely used to describe size-at-age and individual growth across a diverse range of organisms. However, for modelling life histories, ... -
Lifespan extension in a semelparous chordate occurs via developmental growth arrest just prior to meiotic entry
(Peer reviewed; Journal article, 2014-04-02)It is proposed that the ageing process is linked to signaling from the germline such that the rate of ageing can be adjusted to the state of the reproductive system, allowing these two processes to co-evolve. Mechanistic ... -
Lifespan extension in a semelparous chordate Oikopleura dioica via developmental growth arrest : Roles of Target of Rapamycin (TOR) signaling and D type cyclins
(Doctoral thesis, 2015-05-22)All living organisms experience ageing during the course of their lifespan. The science of ageing has emerged into an enthralling area of research. Our knowledge of the mechanisms of ageing and reproduction has been mainly ... -
Ligandaktivering av aryl hydrokarbon reseptor 2 (AhR2) fra Atlanterhavstorsk (Gadus morhua) ved bruk av luciferase genreportersystem
(Master thesis, 2016-07-01)Aryl hydrokarbon reseptor 2 fra atlanterhavstorsk (gmAhR2) er en ligandaktivert transkripsjonsfaktor som tidligere har blitt klonet og karakterisert som xenobiotisk sensor. Ved Universitetet i Bergen er det blitt etablert ... -
Light and visual foraging in the pelagic: Opportunities and constraints along gradients of seasonality
(Doctoral thesis, 2019-04-30)Light has a twofold fundamental impact on marine ecosystems; it allows photosynthesis that is at the source of most marine food chains, but it also governs top-down control through visual foraging. Here, I focus on the ... -
Light comfort zone in a mesopelagic fish emerges from adaptive behaviour along a latitudinal gradient
(Peer reviewed; Journal article, 2019)Throughout the oceans, small fish and other micronekton migrate between daytime depths of several hundred meters and near-surface waters at night. These diel vertical migrations of mesopelagic organisms structure pelagic ... -
Light comfort zones of mesopelagic acoustic scattering layers in two contrasting optical environments
(Peer reviewed; Journal article, 2016-07)We make a comparison of the mesopelagic sound scattering layers (SLs) in two contrasting optical environments; the clear Red Sea and in murkier coastal waters of Norway (Masfjorden). The depth distributions of the SL in ... -
Light conditions during Atlantic salmon embryogenesis affect key neuropeptides in the melanocortin system during transition from endogenous to exogenous feeding
(Journal article; Peer reviewed, 2023)During the first feeding period, fish will adapt to exogenous feeding as their endogenous source of nutrients is depleted. This requires the development of a functional physiological system to control active search for ... -
Light penetration structures the deep acoustic scattering layers in the global ocean
(Peer reviewed; Journal article, 2017)The deep scattering layer (DSL) is a ubiquitous acoustic signature found across all oceans and arguably the dominant feature structuring the pelagic open ocean ecosystem. It is formed by mesopelagic fishes and pelagic ... -
Lignin Preservation and Microbial Carbohydrate Metabolism in Permafrost Soils
(Journal article; Peer reviewed, 2022)Permafrost-affected soils in the northern circumpolar region store more than 1,000 Pg soil organic carbon (OC), and are strongly vulnerable to climatic warming. However, the extent to which changing soil environmental ... -
Limited male incubation ability and the evolution of egg size in shorebirds
(Peer reviewed; Journal article, 2006-06-22)In bird species where males incubate but are smaller than females, egg size may be constrained by male body size, and hence ability to incubate the eggs. Using data from 71 such shorebird species, we show that egg size ... -
Lineage-level divergence of copepod glycerol transporters and the emergence of isoform-specific trafficking regulation
(Journal article; Peer reviewed, 2021)Transmembrane conductance of small uncharged solutes such as glycerol typically occurs through aquaglyceroporins (Glps), which are commonly encoded by multiple genes in metazoan organisms. To date, however, little is known ... -
The lineage-specific evolution of aquaporin gene clusters facilitated tetrapod terrestrial adaptation
(Peer reviewed; Journal article, 2014-11-26)A major physiological barrier for aquatic organisms adapting to terrestrial life is dessication in the aerial environment. This barrier was nevertheless overcome by the Devonian ancestors of extant Tetrapoda, but the origin ... -
Linking bacterial community structure to advection and environmental impact along a coast-fjord gradient of the Sognefjord, western Norway
(Peer reviewed; Journal article, 2017-12)Here we present novel data on bacterial assemblages along a coast-fjord gradient in the Sognefjord, the deepest (1308 m) and longest (205 km) ice-free fjord in the world. Data were collected on two cruises, one in November ... -
Linking dispersal connectivity to population structure and management boundaries for saithe in the Northeast Atlantic
(Journal article; Peer reviewed, 2021)Population connectivity is an increasingly important focal area for the understanding of how marine fish populations respond to anthropogenic pressures like climate change and fisheries. Our model species, the saithe ... -
Linking internal and external bacterial community control gives mechanistic framework for pelagic virus-to-bacteria ratios
(Peer reviewed; Journal article, 2016-11)For more than 25 years, virus-to-bacteria ratios (VBR) have been measured and interpreted as indicators of the importance of viruses in aquatic ecosystems, yet a generally accepted theory for understanding mechanisms ... -
Lipid production in nannochloropsis gaditana during nitrogen starvation
(Peer reviewed; Journal article, 2019)The microalga Nannochloropsis gaditana is a natural producer of triacylglycerol (TAG) and the omega-3 fatty acid eicosapentaenoic acid (EPA). TAG accumulation is induced by nitrogen starvation. The biomass-specific photon ... -
Lipid transporters and receptor in salmon louse (Lepeophtheirus salmonis) : Effect of RNAi Knockdown on oogenesis, embryonal development and larval maturation
(Doctoral thesis, 2021-04-23)The salmon louse, Lepeophtheirus salmonis, is a marine ectoparasite of salmonids in the Northern Hemisphere. At present, salmon louse infestation is considered as one of the biggest challenges in the salmon farming industry, ... -
Lithistid demosponges of the North Atlantic : Taxonomy, Diversity and Biogeographic Patterns
(Doctoral thesis, 2020-11-27)Sponges, phylum Porifera Grant, 1836, comprise a group of benthic filter-feeding organisms, which are one of the oldest living groups of metazoans on Earth. Currently, four classes are recognized within the Phylum, of which ... -
Liver transcriptome analysis of Atlantic cod (Gadus morhua) exposed to PCB 153 indicates effects on cell cycle regulation and lipid metabolism
(Peer reviewed; Journal article, 2014-06-17)Background: Polychlorinated biphenyls (PCBs) are persistent organic pollutants (POPs) with harmful effects in animals and humans. Although PCB 153 is one of the most abundant among PCBs detected in animal tissues, its ...