Browsing Department of Biological Sciences by Title
Now showing items 1083-1102 of 2447
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Hatching time and alevin growth prior to the onset of exogenous feeding in farmed, wild and hybrid Norwegian Atlantic salmon
(Peer reviewed; Journal article, 2014-12-01)The onset of exogenous feeding, when juveniles emerge from the gravel, is a critical event for salmonids where early emergence and large size provide a competitive advantage in the wild. Studying 131 farmed, hybrid and ... -
Heads and tails: The notochord develops differently in the cranium and caudal fin of Atlantic Salmon (Salmo salar, L.)
(Journal article; Peer reviewed, 2020)While it is well known that the notochord of bony fishes changes over developmental time, less is known about how it varies across different body regions. In the development of the Atlantic salmon, Salmo salar L., cranial ... -
Heavy and light chain homologs of ferritin are essential for blood-feeding and egg production of the ectoparasitic copepod Lepeophtheirus salmonis
(Peer reviewed; Journal article, 2019)The salmon louse, Lepeophtheirus salmonis, is a hematophagous ectoparasite of salmonid fish. Due to its blood-feeding activity, the louse is exposed to great amounts of iron, which is an essential, yet potentially toxic ... -
Helminths associated with terrestrial slugs in some parts of Europe
(Journal article; Peer reviewed, 2020)A survey of helminths associated with terrestrial slugs focusing on the invasive Arion vulgaris and the native A. ater was conducted on populations from France, Germany, Netherlands, Norway and Poland. In total, 648 ... -
Hematophagy in the salmon louse (Lepeophtheirus salmonis) : Characterization of genes and proteins involved in parasite blood-feeding
(Doctoral thesis, 2020-02-13)The salmon louse (Lepeophtheirus salmonis) is an obligate, hematophagous ectoparasite infecting salmonid fish such as the Atlantic salmon (Salmo salar). The parasite is at present the number one threat to the Norwegian ... -
Hensikter med lekser i biologiundervisning. En kvalitativ studie av læreres begrunnelser for bruk av lekser i biologifagene i videregående skole
(Master thesis, 2017-06-20)Using homework is a long tradition within Norwegian schools and in most countries. Homework is not embedded in the Norwegian curriculum and hence most teachers choose if they want to give homework or not. Research shows ... -
Herbivory damage but not plant disease under experimental warming is dependent on weather for three subalpine grass species
(Journal article; Peer reviewed, 2022)Both theory and prior studies predict that climate warming should increase attack rates by herbivores and pathogens on plants. However, past work has often assumed that variation in abiotic conditions other than temperature ... -
Herding mesopelagic fish by light
(Peer reviewed; Journal article, 2019)To assess organisms forming mesopelagic scattering layers in the Red Sea, we took advantage of their reactions to light. We used a remotely operated vehicle (ROV) equipped with LED lamps for herding the acoustic targets ... -
Herring (Clupea harengus) in Lindåspollene before and during spawning: spatial decisions and school dynamics
(Master thesis, 2011-06-01)Abstract This study reports on the school dynamics of a self-sustained local population of Atlantic herring (Clupea harengus) in Lindåspollene, south-western Norway, during pre-spawning and spawning, observed over a period ... -
Heterogeneous distribution of plankton within the mixed layer and its implications for bloom formation in tropical seas
(Peer reviewed; Journal article, 2015-06-11)Intensive sampling at the coastal waters of the central Red Sea during a period of thermal stratification, prior to the main seasonal bloom during winter, showed that vertical patches of prokaryotes and microplankton ... -
Heterologous production, purification and substrate usage of a variant of the marine globupain protease
(Master thesis, 2024-02-01) -
Heterotrophic nanoflagellate grazing facilitates subarctic Atlantic spring bloom development
(Peer reviewed; Journal article, 2017)The subarctic Atlantic phytoplankton spring bloom is one of the largest biological features of the ocean; however, processes initiating the bloom are still not well understood. We hypothesize that the microbial grazing ... -
The Hexactinellid Deep-Water Sponge Vazella pourtalesii (Schmidt, 1870) (Rossellidae) Copes With Temporarily Elevated Concentrations of Suspended Natural Sediment
(Journal article; Peer reviewed, 2021)Plumes of re-suspended sediment potentially smother and clog the aquiferous system of filter-feeding sponges with unknown implications for their health. For the first time, we examined the physiological responses of repeated ... -
The Hfq RNA chaperone in the deep-branching Thermotogales lineage: Attempts to reveal its biological role
(Master thesis, 2015-02-01)Bacteria frequently use small RNAs (sRNAs) as part of their regulation of gene expression at the post-transcriptional level. Many of these sRNAs have been shown to depend on the RNA chaperone protein Hfq for their regulatory ... -
Hidden in the fog: Morphological and molecular characterisation of Derogenes varicus sensu stricto (Trematoda, Derogenidae) from Sweden and Norway, and redescription of two poorly known Derogenes species
(Journal article; Peer reviewed, 2023)Derogenes varicus (Müller, 1784) is widely reported as a trematode with exceptionally low host specificity and a wide, bipolar distribution. However, several recent studies have suggested that D. varicus represents a species ... -
Hiding in the background: community-level patterns in invertebrate herbivory across the tundra biome
(Peer reviewed; Journal article, 2019)Invertebrate herbivores depend on external temperature for growth and metabolism. Continued warming in tundra ecosystems is proposed to result in increased invertebrate herbivory. However, empirical data about how current ... -
High abundances of small copepods early developmental stages and nauplii strengthen the perception of a non-dormant Arctic winter
(Journal article; Peer reviewed, 2022)The traditional view is that the Arctic polar night is a quiescent period for marine life, but recent reports of high levels of feeding and reproduction in both pelagic and benthic taxa have challenged this. We examined ... -
High Arctic Invertebrate Biogeography. Patterns and Colonization Processes since the Last Glacial Maximum
(Doctoral thesis, 2011-09-22)The biogeography of Arctic terrestrial invertebrate species, and particularly processes creating and determining patterns of species distribution, have rarely been considered as a whole, but rather on a regional basis, ... -
High CO2 concentration and iron availability determine the metabolic inventory in an Emiliania huxleyi-dominated phytoplankton community
(Journal article; Peer reviewed, 2020)Ocean acidification (OA), a consequence of anthropogenic carbon dioxide (CO2) emissions, strongly impacts marine ecosystems. OA also influences iron (Fe) solubility, affecting biogeochemical and ecological processes. We ... -
High fish density delays wound healing in Atlantic salmon (Salmo salar)
(Peer reviewed; Journal article, 2018-11-15)In this study, we look closer at how high fish densities influence wound repair mechanisms in post-smolt Atlantic salmon. The fish were wounded with a 5 mm skin punch biopsy needle and stocked at two different densities, ...