Browsing Department of Biological Sciences by Title
Now showing items 739-758 of 2230
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Evolutionary Origin and Developmental Relationships of Germline, Gonads, and Embryonic Mesodermal Precursors
(Doctoral thesis, 2023-11-15)Kjønnscellene, oocytter og sædceller, er essensielle celletyper for artsforplantning hos alle seksuelt reproduserende dyr. Differensiering av kjønnsceller kan skje via to ulike mekanismer: arv og induksjon. I denne oppgaven ... -
Evolutionary rescue as a mechanism allowing a clonal grass to adapt to novel climates
(Journal article; Peer reviewed, 2021)Filing gaps in our understanding of species' abilities to adapt to novel climates is a key challenge for predicting future range shifts and biodiversity loss. Key knowledge gaps are related to the potential for evolutionary ... -
Evolutionary responses of Atlantic cod (Gadus morhua) to concurrent fisheries and climate stressors
(Doctoral thesis, 2024-02-08)Evolutionære ændringer i fisk er efterhånden en anderkendt sandhed, især på grund af forskning i fiskeri-induceret evolution siden 1970'erne. Vi ser især disse ændringer påvirke individuelle livshistorier, resulterende i ... -
Evolutionary turnover of mammalian transcription start sites
(Peer reviewed; Journal article, 2006-05-06)Alignments of homologous genomic sequences are widely used to identify functional genetic elements and study their evolution. Most studies tacitly equate homology of functional elements with sequence homology. This assumption ... -
Evolutionary winners are ecological losers among oceanic island plants
(Journal article; Peer reviewed, 2021)Aim Adaptive radiation, in which successful lineages proliferate by exploiting untapped niche space, provides a popular but potentially misleading characterization of evolution on oceanic islands. Here we analyse the ... -
Evolutionary, comparative, and functional analyses of STATs and regulation of the JAK-STAT pathway in lumpfish upon bacterial and poly(I:C) exposure
(Journal article; Peer reviewed, 2023)Background: The Janus kinase/signal transducers and activators of transcription (JAK-STAT) system regulates several biological processes by affecting transcription of genes as a response to cytokines and growth factors. ... -
The Evolving Proteome of a Complex Extracellular Matrix, the Oikopleura House
(Peer reviewed; Journal article, 2012-07-05)Extracellular matrices regulate biological processes at the level of cells, tissues, and in some cases, entire multicellular organisms. The subphylum Urochordata exemplifies the latter case, where animals are partially or ... -
The evolving story of catadromy in the European eel (Anguilla anguilla)
(Journal article; Peer reviewed, 2023)Anguillid eels were once considered to be the classic example of catadromy. However, alternative life cycles have been reported, including skipping the freshwater phase and habitat shifting between fresh, brackish, and ... -
Examining the role of parasites in limiting unidirectional gene flow between lake and river sticklebacks
(Peer reviewed; Journal article, 2019)1. Parasites are important selective agents with the potential to limit gene flow between host populations by shaping local host immunocompetence. 2. We report on a contact zone between lake and river three‐spined sticklebacks ... -
Exitomelita sigynae gen. et sp. nov.: a new amphipod from the Arctic Loki Castle vent field with potential gill ectosymbionts
(Peer reviewed; Journal article, 2011-11-02)The newly discovered deep-sea hydrothermal vent field ‘‘Loki’s Castle’’ at 2,350 m depth at 70 N on the Knipovich Ridge north of the island Jan Mayen is the only known black smoker field from the Arctic Ridge system. This ... -
The exorhodopsin and melanopsin systems in the pineal complex and brain at early developmental stages of Atlantic halibut (Hippoglossus hippoglossus)
(Journal article; Peer reviewed, 2014)The complexity of the nonvisual photoreception systems in teleosts has just started to be appreciated, with colocalization of multiple photoreceptor types with unresolved functions. Here we describe an intricate expression ... -
An expanded calibration model for inferring lakewater and air temperatures from fossil chironomid assemblages in northern Fennoscandia
(Peer reviewed; Journal article, 1999)Chironomid-temperature inference models based on an expanded data set of surface-sediment and limnological data from 53 Subarctic lakes in northern Fennoscandia have been developed using eight different numerical techniques, ... -
Expansion of the barnacle Austrominius modestus (Darwin, 1854) (cirripedia, Thoracica, Balanidae) into Scandinavian waters based on collection data and niche distribution modeling
(Journal article; Peer reviewed, 2021)The barnacle Austrominius modestus, native of New Zealand and Australia was introduced to the South of England around 1943 and has since spread to most coastal waters in Western Europe, including the southern North Sea. ... -
Experiment design and bacterial abundance control extracellular H2O2 concentrations during four series of mesocosm experiments
(Journal article; Peer reviewed, 2020)The extracellular concentration of H2O2 in surface aquatic environments is controlled by a balance between photochemical production and the microbial synthesis of catalase and peroxidase enzymes to remove H2O2 from solution. ... -
Experimental challenge of Atlantic salmon Salmo salar using clones of Paramoeba perurans, P. pemaquidensis and Tetramitus sp.
(Journal article; Peer reviewed, 2021)Salmon gill disease in Norway is in most cases associated with a range of different pathogens, stress and environmental factors. Paramoeba perurans and other amoebae have been isolated during such disease outbreaks. Other ... -
Experimental induction of mouthrot in Atlantic salmon smolts using Tenacibaculum maritimum from Western Canada
(Peer reviewed; Journal article, 2018-08)Mouthrot, or bacterial stomatitis, is a disease which mainly affects farmed Atlantic salmon, (Salmo salar, L.), smolts recently transferred into salt water in both British Columbia (BC), Canada, and Washington State, USA. ... -
Experimental parameterisation of principal physics in buoyancy variations of marine teleost eggs
(Peer reviewed; Journal article, 2014-08-14)It is generally accepted that the high buoyancy of pelagic marine eggs is due to substantial influx of water across the cell membrane just before ovulation. Here we further develop the theoretical basis by applying laboratory ... -
Experimental warming differentially affects vegetative and reproductive phenology of tundra plants
(Journal article; Peer reviewed, 2021)Rapid climate warming is altering Arctic and alpine tundra ecosystem structure and function, including shifts in plant phenology. While the advancement of green up and flowering are well-documented, it remains unclear ... -
Exploring balanced harvesting by using an Atlantis ecosystem model for the Nordic and Barents seas
(Journal article; Peer reviewed, 2020)“Balanced Harvesting” (BH) has been suggested as a possible strategy to meet the objectives of the Ecosystem Approach to Fisheries, ensuring a high sustainable yield while maintaining ecosystem structure and function. BH ... -
Exploring balanced harvesting by using an Atlantis ecosystem model for the Nordic and Barents Seas
(Master thesis, 2018-06-20)To meet the objectives of the Ecosystem Approach to Fisheries, “Balanced Harvesting” (BH) has been suggested as a possible strategy to ensure a high sustainable yield while maintaining ecosystem structure and function. BH ...