Browsing Department of Biological Sciences by Title
Now showing items 969-988 of 2216
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Habitat niche differentiation of Ballan wrasse (Labrus bergylta) and Corkwing wrasse (Symphodus melops) revealed by acoustic telemetry: Implication for an urban restoration project
(Master thesis, 2023-06-02)Anthropogenic changes to natural habitats impact species behavior and habitat use, changing ecological interactions and ecosystem dynamics. Human influenced ecosystems can be found all along the Norwegian coast, where the ... -
Habitat preferences and functional traits drive longevity in Himalayan high-mountain plants
(Journal article; Peer reviewed, 2023)Plant lifespan has important evolutionary, physiological, and ecological implications related to population persistence, community stability, and resilience to ongoing environmental change impacts. Although biologists have ... -
Habitat variability and faunal zonation at the Ægir Ridge, a canyon-like structure in the deep Norwegian Sea
(Journal article; Peer reviewed, 2022)The Ægir Ridge System (ARS) is an ancient extinct spreading axis in the Nordic seas extending from the upper slope east of Iceland (∼550 m depth), as part of its Exclusive Economic Zone (EEZ), to a depth of ∼3,800 m in the ... -
Habitatkrav og diversitet hos vedlevende biller på dødved av lind (Tilia cordata) i Norge
(Master thesis, 2015-07-01)Dødved er et viktig habitat for artsmangfoldet i skog. Dette artsmangfoldet gjør en viktig økosystemtjeneste som nedbrytere og resirkulerer næringsstoffer i skogøkosystemet. Biller (Coleoptera) utgjør en stor andel av dette ... -
Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions
(Peer reviewed; Journal article, 2017)Atlantic salmon (Salmo salar) is one of the best researched fishes, and its aquaculture plays a global role in the blue revolution. However, since the 1970s, tens of millions of farmed salmon have escaped into the wild. ... -
The handbook for standardized field and laboratory measurements in terrestrial climate change experiments and observational studies (ClimEx)
(Peer reviewed; Journal article, 2019-11-05)1. Climate change is a world‐wide threat to biodiversity and ecosystem structure, functioning and services. To understand the underlying drivers and mechanisms, and to predict the consequences for nature and people, we ... -
Harvesting forage fish can prevent fishing-induced population collapses of large piscivorous fish
(Journal article; Peer reviewed, 2021)Fisheries have reduced the abundances of large piscivores—such as gadids (cod, pollock, etc.) and tunas—in ecosystems around the world. Fisheries also target smaller species—such as herring, capelin, and sprat—that are ... -
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 ... -
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 ...