Browsing Department of Biological Sciences by Title
Now showing items 301-320 of 1630
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Dancing around the pole: holarctic phylogeography of the Arctic fairy shrimp Branchinecta paludosa (Anostraca, Branchiopoda)
(Peer reviewed; Journal article, 2016-02-09)The distributional patterns of Arctic species are commonly affected by the recurring Pleistocene glaciations, which contributed to transient or permanent genetic isolation. Here we explore the phylogeography of the ... -
The Day-to-day Supply Responses of a Limited-entry Mixed Fishery
(Journal article; Peer reviewed, 2021)Small-scale fishers’ short-run supply decisions are understudied, often because of data limitations. We utilize a unique dataset of daily catches and prices from a mixed-species trawl fishery in Taiwan, characterized by ... -
Decision-making from the animal perspective: Bridging ecology and subjective cognition
(Journal article; Peer reviewed, 2019-05-14)Organisms have evolved to trade priorities across various needs, such as growth, survival, and reproduction. In naturally complex environments this incurs high computational costs. Models exist for several types of decisions, ... -
Decision-making in a proximate model framework: How behaviour flexibility is generated by arousal and attention
(Master thesis, 2017-08-19)Animals must make decisions based on limited information and during a limited amount of time. The time spent exploring possibilities and sampling environmental information, means less time spent at actually gathering and ... -
Deep chlorophyll a maxima (DCMs) in pelagic Antarctic waters. II. Relation to bathymetric features and dissolved iron concentrations
(Peer reviewed; Journal article, 2005-08-01)A deep chlorophyll a maximum (DCM) at depths between 60 and 90 m in waters south of the Antarctic Polar Front (APF) occurs only in pelagic waters where the chlorophyll a concentrations in the upper mixed layer (UML) are ... -
Deep vision: An in-trawl stereo camera makes a step forward in monitoring the pelagic community
(Peer reviewed; Journal article, 2014-11-13)Ecosystem surveys are carried out annually in the Barents Sea by Russia and Norway to monitor the spatial distribution of ecosystem components and to study population dynamics. One component of the survey is mapping the ... -
Deep-Sea Carnivorous Sponges From the Mariana Islands
(Peer reviewed; Journal article, 2019-07-10)Carnivorous sponges belonging to family Cladorhizidae (Porifera, Demospongiae, Poecilosclerida) are unique within phylum Porifera due to their ability to capture and envelop small prey. While other sponges use an aquiferous ... -
Deep-sea sponge grounds as nutrient sinks: Denitrification is common in boreo-Arctic sponges
(Journal article; Peer reviewed, 2020-03)Sponges are commonly known as general nutrient providers for the marine ecosystem, recycling organic matter into various forms of bioavailable nutrients such as ammonium and nitrate. In this study we challenge this view. ... -
Deep-sequencing of the bacterial microbiota in commercial-scale recirculating and semi-closed aquaculture systems for Atlantic salmon post-smolt production
(Peer reviewed; Journal article, 2016-10-20)New aquaculture production systems are evolving for prolong production of Atlantic salmon smolts or post-smolts before stocking in traditional net pens, such as semi-closed containment systems (S-CCS) in sea (Fig. 1) and ... -
Degrees of change: between and within population variation in thermal reaction norms of phenology in a viviparous lizard
(Journal article; Peer reviewed, 2020)As the earth warms, populations will be faced with novel environments to which they may not be adapted. In the short term, populations can be buffered against the negative effects, or maximize the beneficial effects, of ... -
Demosponges from the Northern Mid-Atlantic Ridge shed more light on the diversity and biogeography of North Atlantic deep-sea sponges
(Peer reviewed; Journal article, 2015-08-06)In July–August 2004, the Mid-Atlantic Ridge Ecosystems (MAR-Eco) expedition collected Demospongiae (Porifera) from the Northern Mid-Atlantic Ridge (MAR) north of the Azores, between 41°N and 61°N. Demosponges were found ... -
Density regulation in Northeast Atlantic fish populations: Density dependence is stronger in recruitment than in somatic growth
(Peer reviewed; Journal article, 2018-05)Population regulation is a central concept in ecology, yet in many cases its presence and the underlying mechanisms are difficult to demonstrate. The current paradigm maintains that marine fish populations are predominantly ... -
Density-dependent consequences of size-selective induced life-history changes to population fitness in medaka (Oryzias latipes)
(Journal article; Peer reviewed, 2020)There is an increasing concern about the potential for size-selective harvest to impair population persistence. Yet little is known about the relative contribution of the evolutionary (shifts in life history) and demographic ... -
Density-independent mortality at early life stages increases the probability of overlooking an underlying stock-recruitment relationship
(Journal article; Peer reviewed, 2021)Abstract Beverton and Holt’s (1957) monograph contributed a widely used stock–recruitment relationship (BH-SRR) to fisheries science. However, because of variation around a presumed relationship between spawning biomass ... -
Depletion of the human N-terminal acetyltransferase hNaa30 disrupts Golgi integrity and ARFRP1 localization
(Peer reviewed; Journal article, 2017-04-28)The organization of the Golgi apparatus (GA) is tightly regulated. Golgi stack scattering is observed in cellular processes such as apoptosis and mitosis, and has also been associated with disruption of cellular lipid ... -
Desmozoon lepeophtherii as a pathogen in Norwegian salmon aquaculture
(Master thesis, 2011-06-01)During late summer and autumn 2008 the Norwegian Veterinary Institute Bergen received several diagnostic cases with similar histopathological changes. Due to unknown cause of the the condition it was subsequently called ... -
Detection of misfolded protein aggregates from a clinical perspective
(Peer reviewed; Journal article, 2016)Neurodegenerative Protein Misfolding Diseases (PMDs), such as Alzheimer’s (AD), Parkinson’s (PD) and prion diseases, are generally difficult to diagnose before irreversible damage to the central nervous system damage has ... -
Detection of the myxosporean parasite Parvicapsula pseudobranchicola in Atlantic salmon (Salmo salar L.) using in situ hybridization (ISH)
(Peer reviewed; Journal article, 2015-02-15)Background: Parvicapsula pseudobranchicola is a marine myxosporean parasite infecting farmed Atlantic salmon (Salmo salar). A major site for the parasite is the pseudobranch, which may be destroyed in heavily infected fish. ... -
Developing common protocols to measure tundra herbivory across spatial scales
(Journal article; Peer reviewed, 2021)Understanding and predicting large-scale ecological responses to global environmental change requires comparative studies across geographic scales with coordinated efforts and standardized methodologies. We designed, ... -
Developing Molecular Tools to study Trophic Interactions in zooplankton and their implementation in a vent system -Norwegian Sea Hydrothermal Vents
(Doctoral thesis, 2014-06-27)Understanding hydrothermal plumes in the Arctic and Nordic Seas is an important objective for ecosystem assessments of these habitats. Very little is known about what role the hydrothermal plumes play in the Nordic Seas. ...