Browsing Department of Biological Sciences by Title
Now showing items 1324-1343 of 1387
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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 ... -
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 ... -
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 ... -
A unique insight into repeat spawning in Atlantic salmon, using DNA profiling in the river Etne
(Master thesis, 2020-06-11) -
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 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, ... -
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 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 ... -
Using Red List species in designating protection status to forest areas: a case study on the problem of spatio-temporal dynamics
(Journal article; Peer reviewed, 2020)Red-listed species are often used as target species in selection of sites for conservation. However, limitations to their use have been pointed out, and here we address the problem of expected high spatio-temporal dynamics ... -
Using species attributes to characterize late-glacial and early-Holocene environments at Kråkenes, western Norway
(Peer reviewed; Journal article, 2019-08-16)Aim: We aim to use species attributes such as distributions and indicator values to reconstruct past biomes, environment, and temperatures from detailed plant‐macrofossil data covering the late glacial to the early Holocene ... -
Utilisation of fish or crab silage protein for cobia (Rachycentron canadum) – effects on digestion, amino acid distribution, growth, fillet composition and storage quality
(Doctoral thesis, 2009-04-17)The present study was carried out to test the ability to utilise fish silage to feed cobia (Rachycentron canadum) in aquaculture in Vietnam. All four experiments of the present study were carried out over 13 months from ... -
Utilization of kelp-derived carbon sources by kelp surface-associated bacteria
(Peer reviewed; Journal article, 2011-01)The surfaces of kelp are covered with bacteria that may utilize kelp-produced carbon and thereby contribute significantly to the carbon flux in kelp forest ecosystems. There is scant knowledge about the identity of these ... -
Utvikling og testing av RNA-probe mot nsP2 (Salmonid alfavirus subtype 2) for bruk på celler og vev
(Master thesis, 2009-06-15)Salmonid alfavirus (SAV) er et virus i familien Togaviridae og forårsaker sykdomsproblemer ved oppdrett av laks (Salmo salar L) og regnbueørret (Oncorhynchus mykiss, Walbaum) i Europa. Det er per i dag kjent at det forekommer ... -
Vaksinering av berggylt (Labrus bergylta) mot Aeromonas salmonicida A-lagstype V og VI
(Master thesis, 2016-06-09)Oppdrettet berggylt brukt som rensefisk for laks ble vaksinert med en divalent vaksine mot Aeromonas salmonicida A-lagstype V og VI. En uvaksinert negativ kontrollgruppe med samme opprinnelse ble fordelt på andre merder i ...