Blar i Department of Biological Sciences på tittel
Viser treff 1309-1328 av 2501
-
Investigation of the putative iron reducing capabilities of Lokiarchaeota
(Master thesis, 2015-06-01)Marine subsurface sediments are large and ecologically significant microbial habitats. The archaeal phylum Lokiarchaeota is a group of organisms commonly found in these sediments. Their metabolism is unknown, but based on ... -
Investigations of the CEL VNTR by cellular experiments and in silico analyses
(Master thesis, 2023-06-02)Carboxyl ester lipase (CEL) is a digestive enzyme which is secreted by acinar cells in the pancreas and released into the intestines. In addition to the globular domain responsible for lipase activity, CEL contains a ... -
Iodine nutrition and toxicity in Atlantic cod (Gadus morhua) larvae
(Peer reviewed; Journal article, 2013-02-19)Copepods as feed promote better growth and development in marine fish larvae than rotifers. However, unlike rotifers, copepods contain several minerals such as iodine (I), at potentially toxic levels. Iodine is an essential ... -
Ion transporters and osmoregulation in the kidney of teleost fishes as a function of salinity
(Journal article; Peer reviewed, 2021-04-20)Euryhaline teleosts exhibit major changes in renal function as they move between freshwater (FW) and seawater (SW) environments, thus tolerating large fluctuations in salinity. In FW, the kidney excretes large volumes of ... -
Is a warmer Arctic a more contaminated Arctic? Atlantification of Kongsfjorden in relation to contaminant levels in seabirds
(Master thesis, 2022-01-31)The Arctic, and Svalbard in particular, is experiencing a more rapid warming compared to the global average. Such Atlantification of the Arctic may change food webs in a way that can also affect the contaminant levels in ... -
Is eggshell colouration related to the sex of the embryo in the northern lapwing Vanellus vanellus?
(Master thesis, 2019-06-21)This study focuses on eggshell pigmentation in the northern lapwing Vanellus vanellus, a shorebird in the plover family. The pigmentation of dark spots is attributed to the organic compound protoporphyrin, which is associated ... -
Is habituation measurable in lumpfish cyclopterus lumpus when used as cleaner fish in Atlantic salmon Salmo salar aquaculture?
(Peer reviewed; Journal article, 2019)To investigate how lumpfish interact in Atlantic salmon aquaculture, physiological stress responses and changes in behaviour were analysed in experienced and naive lumpfish. Experienced lumpfish (30.2 ± 7.93 g, mean ± SD) ... -
Is individual variation in competitive performance of reared juvenile cod influenced by haemoglobin genotype?
(Peer reviewed; Journal article, 2000)To succeed in scramble competition for food an individual fish will have to have characteristics that allow it to respond rapidly to encountered prey. A trait such as metabolic rate, which has a positive effect on oxygen ... -
“Is it important to consider males while measuring the reproductive potential of a fish stock?”
(Master thesis, 2008)This study explored the paternal contribution to stock reproductive potential in Northeast Arctic (NEA) cod (Gadus morhua L.). An equation for estimating total annual viable sperm production (VSP) was parameterised for NEA ... -
Is it possible to photoperiod manipulate spawning time in planktivorous fish ? A long-term experiment on Atlantic herring
(Journal article; Peer reviewed, 2022)The oocyte development (vitellogenesis) of individual fish is highly dependent upon their physiology which is influenced by both intrinsic and extrinsic factors. Thus, if individuals encounter poor biophysical conditions, ... -
Is the evolution of clutch size limited by incubation ability in shorebirds?
(Master thesis, 2015-06-01)Incubation is a crucial aspect of avian life history where differences in incubation techniques and investments can have long lasting effects on offspring and parental well- being and reproductive success. The factors ... -
Isocitrate dehydrogenase from extremophiles; Molecular adaptations to high temperatures
(Doctoral thesis, 2006-11-30)Life on earth has adapted to a wide variety of environmental conditions, many of which are extreme to us humans. Temperature is one of the most important factors limiting biological activity and survival, but so far, ... -
Isolation and Characterisation of Shiga Toxin-Producing Escherichia Coli from Norwegian Bivalves
(Master thesis, 2017-06-23)Only few studies concerning Shiga toxin-producing E. coli (STEC) detection in coastal environments and bivalves have been reported and there have been no reported outbreaks by STEC from bivalves in the world. The aim of ... -
Isolation and characterization of a new keratinolytic Fervidobacterium pennivorans strain from a hot spring in Tajikistan
(Master thesis, 2018-06-30)Thermophiles are organisms found among the Archaea and Eubacteria domains which are adapted to live at high temperature, the optimal growth temperature being between 50 °C and 79 °C. Phylum Thermotogae includes anaerobic ... -
Isolation and Characterization of Novel Planctomycetes from Svarthammarhola Ice Cave with Potential for Production of Bioactive Molecules
(Master thesis, 2018-08-31)Planctomycetes represent a phylum of bacteria that possess peculiar characteristics. These include reproduction by budding, crateriform structures, rosette formation and an intricate cellular plan. They are considered ... -
Isolation and complete genome sequence of the thermophilic Geobacillus sp. 12AMOR1 from an Arctic deep-sea hydrothermal vent site
(Peer reviewed; Journal article, 2016-02-24)Members of the genus Geobacillus have been isolated from a wide variety of habitats worldwide and are the subject for targeted enzyme utilization in various industrial applications. Here we report the isolation and complete ... -
JASPAR 2010: the greatly expanded open-access database of transcription factor binding profiles
(Peer reviewed; Journal article, 2010)JASPAR (http://jaspar.genereg.net) is the leading open-access database of matrix profiles describing the DNA-binding patterns of transcription factors (TFs) and other proteins interacting with DNA in a sequence-specific ... -
Jellyfish distribute vertically according to irradiance
(Peer reviewed; Journal article, 2017-03)We tested the hypothesis that the coronate jellyfish Periphylla periphylla distributes vertically according to a preferential range of absolute light intensities. The study was carried out in Lurefjorden, Norway, a fjord ... -
Joining forces for sustainability education – Sustainability Education Collective at the University of Bergen
(Journal article; Peer reviewed, 2021)Agenda 2030 and its Sustainable Development Goals (SDGs) have resulted in a heightened focus on sustainability in Norwegian – and global – academia. Sustainability Education requires innovative pedagogy and active, ... -
Judging a salmon by its spots: Environmental variation is the primary determinant of spot patterns in Salmo salar
(Peer reviewed; Journal article, 2018-04-12)Background. In fish, morphological colour changes occur from variations in pigment concentrations and in the morphology, density, and distribution of chromatophores in the skin. However, the underlying mechanisms remain ...