Blar i Department of Biological Sciences på tittel
Viser treff 2061-2080 av 2158
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Ultrastructure of the anterior organ and posteriorfunnel-shaped canal of Gyrocotyle urna Wagener, 1852(Cestoda: Gyrocotylidea)
(Peer reviewed; Journal article, 2015-05-22)Using scanning and transmission electron microscopy, ultrastructure of the anterior organ and posterior funnel-shaped canal of Gyrocotyle urna Wagener, 1852 (Cestoda: Gyrocotylidea) from ratfish, Chimaera monstrosa ... -
An Unaccounted Fraction of Marine Biogenic CaCO3 Particles
(Peer reviewed; Journal article, 2012-10-23)Biogenic production and sedimentation of calcium carbonate in the ocean, referred to as the carbonate pump, has profound implications for the ocean carbon cycle, and relate both to global climate, ocean acidification and ... -
Unaccounted mortality in purse seine fisheries. Quantification and mitigation of slipping mortality
(Doctoral thesis, 2014-06-06)Purse seining is an efficient fishing method that is used to catch most of the world’s pelagic fish species. In some of these fisheries slipping is used to adjust catch size, increase catch value or to release illegal ... -
Uncertainty and ignored information in the analysis of bat ultrasound: Bayesian approximation to the rescue
(Journal article; Peer reviewed, 2022)Bat ultrasound analysis has been around for several decades and it is one of the most important tools in studies of bat ecology. Discrimination between species is based on intra-specific features of echolocation calls. ... -
Unclear associations between small pelagic fish and jellyfish in several major marine ecosystems
(Peer reviewed; Journal article, 2019-02-28)During the last 20 years, a series of studies has suggested trends of increasing jellyfish (Cnidaria and Ctenophora) biomass in several major ecosystems worldwide. Some of these systems have been heavily fished, causing a ... -
Understanding climate change impacts on biome and plant distributions in the Andes: Challenges and opportunities
(Journal article; Peer reviewed, 2022)Aim: Climate change is expected to impact mountain biodiversity by shifting species ranges and the biomes they shape. The extent and regional variation in these impacts are still poorly understood, particularly in the ... -
Understanding the occurrence and fate of microplastics in coastal Arctic ecosystems: The case of surface waters, sediments and walrus (Odobenus rosmarus)
(Journal article; Peer reviewed, 2021)The Arctic ecosystem receives contaminants transported through complex environmental pathways – such as atmospheric, riverine and oceanographic transport, as well as local infrastructure. A holistic approach is required ... -
Unfenced Borders Cause Differences in Vegetation and Fauna Between Protected and Unprotected Areas in a Tropical Savanna
(Peer reviewed; Journal article, 2019-09-04)Protected areas generally occur within a matrix of intensively human-modified landscapes. As a way to maintain the biodiversity in these areas, enclosure by fencing is often preferred. This strategy, however, is costly and ... -
Unique spicules may confound species differentiation: Taxonomy and biogeography of Melonanchora Carter, 1874 and two new related genera (Myxillidae: Poecilosclerida) from the Okhotsk Sea
(Journal article; Peer reviewed, 2021)Sponges are amongst the most difficult benthic taxa to properly identify, which has led to a prevalence of cryptic species in several sponge genera, especially in those with simple skeletons. This is particularly true for ... -
Unravelling the Complex Duplication History of Deuterostome Glycerol Transporters
(Journal article; Peer reviewed, 2020)Transmembrane glycerol transport is an ancient biophysical property that evolved in selected subfamilies of water channel (aquaporin) proteins. Here, we conducted broad level genome (>550) and transcriptome (>300) analyses ... -
Unravelling the complexity of plant community responses to climate change
(Doctoral thesis, 2023-05-26)Global oppvarming fører til at arter beveger seg høyere opp i fjellet og resulterer i en omfordeling av artene og en termofilisering av artssamfunn, det vil si atantall termofile arter øker mens antall kulde-tilpassede ... -
Unravelling the complexity of salt marsh ‘Fucuscottonii’ forms (Phaeophyceae, Fucales)
(Peer reviewed; Journal article, 2017)Genetic affiliation, nuclear DNA content, and gamete functioning were examined in small salt marsh Fucus from three localities in western Ireland. Individuals with small and dioecious receptacles were found at all localities, ... -
Unrestrained ESCRT-III drives micronuclear catastrophe and chromosome fragmentation
(Journal article; Peer reviewed, 2020)The ESCRT-III membrane fission machinery maintains the integrity of the nuclear envelope. Although primary nuclei resealing takes minutes, micronuclear envelope ruptures seem to be irreversible. Instead, micronuclear ... -
Upward shift in elevational plant species ranges in Sikkilsdalen, Central Norway
(Journal article, 2011-11-04)Phytosociological studies are an important tool to detect temporal vegetation changes in response to global climate change. In this study, we present the results of a resurvey of a plot-based phytosociological study from ... -
Use of algae technology for production of biohydrogen from green microalgae: Possibilities for a practical sustainable process and diversity at both species selection, culturing and gene transcript levels
(Doctoral thesis, 2011-01-28)Algae technology represents an extensive research field which has developed rapidly over the last decades. The research activities extend from algae cultivation including CO2 capture, production of commercial products such ... -
The use of photo and video as surveying tools on sessile organisms in shallow soft-bottom habitats - Photoframe and videosleigh method
(Master thesis, 2018-04-18)The Institute of Marine Research (IMR) wants to start a systematic survey of shallow, soft-bottom habitats. The IMR wants to implement two new methods using photo and video, the photoframe and the videosleigh method. Where ... -
The use of photoperiods to provide year round spawning in lumpfish Cyclopterus lumpus
(Peer reviewed; Journal article, 2019)In order to provide year round spawning broodstock, lumpfish (initial size 746 g and 24.9 cm) were reared under four different photoperiod regimes from January 2017 to July 2018. One group was reared under simulated natural ... -
Using a self-determination theory approach to understand student perceptions of inquiry-based learning
(Journal article; Peer reviewed, 2021)Inquiry-based laboratory activities, as a part of science curricula, have been advocated to increase students’ learning outcomes and improve students’ learning experiences, but students sometimes struggle with open-inquiry ... -
Using behaviour of herring (Clupea harengus L.) to assess post-crowding stress in purse-seine fisheries
(Master thesis, 2014-05-30)Within the purse-seine fishery crowding fish at high densities, during the process of slipping, has been shown to cause high mortalities. Mitigation measures are therefore needed to enable fishermen to avoid slipping fish, ... -
Using Grizzly Bears to Assess Harvest-Ecosystem Tradeoffs in Salmon Fisheries
(Peer reviewed; Journal article, 2012-04-10)Implementation of ecosystem-based fisheries management (EBFM) requires a clear conceptual and quantitative framework for assessing how different harvest options can modify benefits to ecosystem and human beneficiaries. We ...