Blar i Department of Biological Sciences på tittel
Viser treff 1682-1701 av 2482
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On the ecology, toxicology, and phylogeny of cyanobacteria in Murchison Bay of Lake Victoria, Uganda
(Doctoral thesis, 2008-06-04)One of the major threats to Lake Victoria is eutrophication and an increasing proliferation of cyanobacteria. Many cyanobacterial species have the ability to produce toxic compounds (cyanotoxins), which can cause considerable ... -
On the morphology of the domesticated dog in medieval Norway.
(Master thesis, 2015-12-12)There is a large amount of bones at the Osteological collection in the Natural History Museum in Bergen, from Norwegian urban settlements from the middle ages. A large amount of bones from excavations all over Norway have ... -
One hundred years of Quaternary pollen analysis 1916-2016
(Peer reviewed; Journal article, 2018-03)We review the history of Quaternary pollen analysis from 1916 to the present-day, with particular emphasis on methodological and conceptual developments and on the early pioneers of the subject. The history is divided into ... -
Ontogenetic Change in Behavioral Responses to Structural Enrichment From Fry to Parr in Juvenile Atlantic Salmon (Salmo salar L.)
(Journal article; Peer reviewed, 2021)Enrichment is widely used as a tool for studying how changes in environment affect animal behavior. Here, we report an experimental study investigating if behaviors shaped by stimuli from environmental enrichment depending ... -
Ontogenetic movements of cod in Arctic fjords and the Barents Sea as revealed by otolith microchemistry
(Journal article; Peer reviewed, 2020-04-06)The distribution of Atlantic cod (Gadus morhua) in northern Norwegian waters is expanding eastward and northward in the Barents Sea and along western Svalbard. In the Arctic fjords of Svalbard, cod has become abundant, but ... -
Ontogenetic niche shifts in a locally endangered tree species (Olea europaea subsp. cuspidata) in a disturbed forest in Northern Ethiopia: Implications for conservation
(Journal article; Peer reviewed, 2021)Understanding the responses of different ontogenetic stages to environmental and human disturbance factors is essential for developing efficient conservation strategies for endangered plant species. We examined how three ... -
The ontogeny and brain distribution dynamics of the appetite regulators NPY, CART and pOX in larval Atlantic cod (Gadus morhua L.)
(Peer reviewed; Journal article, 2016-04-21)Similar to many marine teleost species, Atlantic cod undergo remarkable physiological changes during the early life stages with concurrent and profound changes in feeding biology and ecology. In contrast to the digestive ... -
An open pilot study of an internet-delivered intervention targeting self-perceived residual cognitive symptoms after major depressive disorder
(Journal article; Peer reviewed, 2021)Residual cognitive symptoms are associated with reduced daily life functioning, quality of life and represent a risk factor for relapse of major depressive disorder (MDD). There are few studies targeting self-perceived ... -
Open water zooplankton communities in North African wetland lakes: the CASSARINA Project
(Peer reviewed; Journal article, 2001)Zooplankton (Copepoda, Cladocera, Ostracoda, Rotifera and Diptera larvae) in nine North African lakes was collected from open water areas over twenty months during 1997/99. The results were used to monitor changes in the ... -
Open-source data reveal how collections-based fungal diversity is sensitive to global change
(Peer reviewed; Journal article, 2019)Premise of the Study Fungal diversity (richness) trends at large scales are in urgent need of investigation, especially through novel situations that combine long‐term observational with environmental and remotely sensed ... -
Operculum PIT tagging: a viable alternative to avoid human consumption in processed salmon
(Journal article; Peer reviewed, 2021)Background: Passive integrated transponder (PIT) tags are commonly used to identify individual fish. However, use of PIT tags in commercial aquaculture research is limited by consumer safety concerns. For farmed fish, it ... -
Opposite selection on behavioural types by active and passive fishing gears in a simulated guppy Poecilia reticulata fishery
(Peer reviewed; Journal article, 2015-03)This study assessed whether fishing gear was selective on behavioural traits, such as boldness and activity, and how this was related with a productivity trait, growth. Female guppies Poecilia reticulata were screened for ... -
Optimal defense strategies in an idealized microbial food web under trade-off between competition and defense
(Peer reviewed; Journal article, 2014-07-07)Trophic mechanisms that can generate biodiversity in food webs include bottom-up (growth rate regulating) and top-down (biomass regulating) factors. The top-down control has traditionally been analyzed using the concepts ... -
Optimal reproductive phenology under size-dependent cannibalism
(Journal article; Peer reviewed, 2020)Intra-cohort cannibalism is an example of a size-mediated priority effect. If early life stages cannibalize slightly smaller individuals, then parents face a trade-off between breeding at the best time for larval growth ... -
Optimal response to lousy circumstances: The impact of salmon lice (Lepeophtheirus salmonis) on depth preference of sea trout (Salmo trutta)
(Master thesis, 2018-06-12)Sea trout are known for seeking out sources of freshwater to rid themselves of salmon lice. Still, the effect of natural haloclines in fjords on parasite dynamics is not well understood. We tagged 48 wild caught sea trout, ... -
Optimalisering av vektordesign for en mukosal DNA-vaksine mot lakselus (Lepeophtheirus salmonis) i laks (Salmo salar)
(Master thesis, 2023-06-02)Den marine hoppekrepsen Lepeophtheirus salmonis (lakselus) er en blodspisende ektoparasitt som infiserer vill laksefisk, deriblant oppdrettslaks. Lakselusen utgjør det viktigste problemet i oppdrettsnæringen, da skadene ... -
Optimisation of dietary n-3 and n-6 fatty acids for a robust Atlantic salmon (Salmo salar)
(Doctoral thesis, 2022-06-28)An optimal diet for Atlantic salmon (Salmo salar) should promote a healthy fish that is robust to changes in its environmental conditions and can withstand the handling it will encounter under farming conditions, all while ... -
Optimisation of trace mineral supplementation in diets for Atlantic salmon smolt with reference to holistic fish performance in terms of growth, health, welfare, and potential environmental impacts
(Journal article; Peer reviewed, 2023)The aquafeed ingredient inventory is ever changing, from marine to plant based, and recently evolving to incorporate increasing amounts of low trophic, side stream and circular economy based raw materials, each one ... -
Optimising cell wall disruption of microalgae biomass for release of nutrients and bioactive compounds for aquafeed and food applications
(Master thesis, 2019)Microalgae are photosynthetic organisms and primary producers of essential nutrients in the aquatic food chain. Although currently less exploited, microalgae culture can provide nutrients to cover the increasing demand for ...