Blar i Department of Biological Sciences på tittel
Viser treff 1238-1257 av 2279
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Lack of population genetic structure of lumpfish along the Norwegian coast: A reappraisal based on EST-STRs analyses
(Journal article; Peer reviewed, 2022)Lumpfish is now the single most important cleaner fish species to date and there is an extensive lumpfish translocation along the Norwegian coast. A reliable baseline information about the population genetic structure of ... -
Lake-sediment evidence for local and remote sources of atmospherically deposited pollutants on Svalbard
(Peer reviewed; Journal article, 2004)Twenty-one lakes along the west coast of Svalbard were cored between 28 July and 14 August 1995. Five cores were 210Pb dated and analysed for spheroidal carbonaceous particles (SCPs), indicators of deposition from fossil-fuel ... -
Lake-sediment records of recent environmental change on Svalbard: results of diatom analysis
(Peer reviewed; Journal article, 2004)Surface sediments from 23 lakes on Svalbard were analysed for diatoms. 182 taxa were found but samples generally have a low richness, with the majority of sites dominated by benthic genera such as Fragilaria, Navicula, and ... -
Land-use and climate impacts on drought resistance and resilience in coastal heathland ecosystems
(Doctoral thesis, 2021-12-15)Background: Coastal heathlands of north-western Europe are semi-natural landscapes of high conservation value. These are ancient and historically widespread landscapes, but anthropogenic land-use and climate change are now ... -
Large annual variation in the amount of skipped spawning for female Northeast Arctic haddock Melanogrammus aeglefinus
(Journal article; Peer reviewed, 2020-10)Although the phenomenon of skipped spawning has been described in numerous fishes, time-series are scarce. We used the presence of post-ovulatory follicles in histological gonad slides from females not developing oocytes ... -
Large mesopelagic fishes biomass and trophic efficiency in the open ocean
(Peer reviewed; Journal article, 2014-02-07)With a current estimate of ~1,000 million tons, mesopelagic fishes likely dominate the world total fishes biomass. However, recent acoustic observations show that mesopelagic fishes biomass could be significantly larger ... -
Last Glacial Maximum environmental conditions at Andøya, northern Norway; evidence for a northern ice-edge ecological “hotspot”
(Journal article; Peer reviewed, 2020)Andøya on the NW coast of Norway is a key site for understanding the Last Glacial Maximum (LGM) in northern Europe. Controversy has arisen concerning the local conditions, especially about the timing and extent of local ... -
Last-century vegetational changes in northern Europe. Characterisation, causes, and consequences
(Doctoral thesis, 2011-11-04)In the face of recent changes in environmental conditions and climate, longterm studies provide important insights into patterns and processes of vegetational change. In northern Europe, however, long-term studies are rare ... -
Late Quaternary chironomid community structure shaped by rate and magnitude of climate change
(Journal article; Peer reviewed, 2021)Much is known about how climate change impacts ecosystem richness and turnover, but we have less understanding of its influence on ecosystem structures. Here, we use ecological metrics (beta diversity, compositional disorder ... -
Latitudinal differences in early growth of largehead hairtail (Trichiurus japonicus) in relation to environmental variables
(Journal article; Peer reviewed, 2020)Largehead hairtail (Trichiurus japonicus) in the China Seas shows an increasing catch trend, despite continued overexploitation, which could be attributed to improved recruitment as a result of strengthened early growth. ... -
Learning through practice in biology education
(Doctoral thesis, 2019-04-25)Work continues to be an important educational measure in higher education. It has received increasing focus both among policymakers, educators, and in educational science research as a valuable addition to campus-based, ... -
Lemon sole Microstomus kitt in the northern North Sea: a multidisciplinary approach to the early life-history dynamics
(Journal article; Peer reviewed, 2021)Lemon sole Microstomus kitt is a commercially valuable flatfish species that occurs in shelf waters around the northeast Atlantic. Only the most basic life-history information is available for the North Sea. Spawning is ... -
Length Related Diurnal Vertical Migration of Cod (Gadus morhua L.), Haddock (Melanogrammus aeglefinus L.) and Redfish (Sebastes spp.) in the Barents Sea
(Master thesis, 2001)Vertical fish migrations can increase variability in bottom survey data, especially if unknown diurnal length-frequency distribution is different between layers. Surveys, using echo sounder technique to estimate demersal ... -
Leptin receptor-deficient (knockout) zebrafish: Effects on nutrient acquisition
(Journal article; Peer reviewed, 2021)In mammals, knockout of LEPR results in a hyperphagic, morbid obese, and diabetic phenotype, which supports that leptin plays an important role in the control of appetite and energy metabolism, and that its receptor, LEPR, ... -
Leucine did not stimulate growth and accretion in either stressed or unstressed Atlantic salmon
(Journal article; Peer reviewed, 2021)The aim of the current trial was to test whether leucine affected growth and accretion including test any effects on leucine upon stress. Quadruplicate tanks each containing 50 Atlantic salmon (Salmo salar) (mean start ... -
Life after fire: smoke and ash as germination cues in ericads, herbs and graminoids of northern heathlands
(Peer reviewed; Journal article, 2014-05-02)Question: What is the impact of the fire cues smoke and ash on seed germination of important functional groups in the heathland system, namely ericads, herbs and graminoids? We predict that if germination from heathland ... -
Life after fire: the impact of fire on species composition and diversity in coastal heathlands
(Doctoral thesis, 2015-09-11)Fire prone coastal heathlands are widespread, and range from naturally fire prone Mediterranean-type heathlands, to the anthropogenic heathlands of north-west Europe. Regardless of its source, fire is an important disturbance ... -
Life histories determine divergent population trends for fishes under climate warming
(Journal article; Peer reviewed, 2020-08-14)Most marine fish species express life-history changes across temperature gradients, such as faster growth, earlier maturation, and higher mortality at higher temperature. However, such climate-driven effects on life histories ... -
Life histories of Antarctic incirrate octopods (Cephalopoda: Octopoda)
(Journal article; Peer reviewed, 2019-07-11)As a general trend in the life history of marine organisms, species inhabiting cold waters have reduced growth rates and increased lifespans. Studies based on egg sizes and brooding times of deep-sea and polar octopods ... -
Life history adaptations to seasonality
(Doctoral thesis, 2007-02-16)The thesis contains studies of animal life histories at high latitudes. Several topics are covered; from ecosystem consequences of life histories to tests of specific behavioural predictions put forward based on life history ...