Blar i Department of Biological Sciences på tittel
Viser treff 1363-1382 av 2512
-
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 ... -
Life history traits for Ophryotrocha craigsmithi (Wiklund, Glover & Dahlgren, 2009), a candidate species in integrated multitrophic aquaculture
(Journal article; Peer reviewed, 2023-02-07)Ophryotrocha craigsmithi (Wiklund, Glover & Dahlgren, 2009) has repeatedly been observed in high densities at salmonid fish farms in Norway and has been shown to feed on the organic waste released during fish production. ... -
Life in the fast lane: Revisiting the fast growth—High survival paradigm during the early life stages of fishes
(Journal article; Peer reviewed, 2023)Early life survival is critical to successful replenishment of fish populations, and hypotheses developed under the Growth-Survival Paradigm (GSP) have guided investigations of controlling processes. The GSP postulates ... -
Life-history evolution in response to foraging risk, modelled for Northeast Arctic cod (Gadus morhua)
(Journal article; Peer reviewed, 2023)Foraging behaviour is known to be a key element in ecology and evolution. Increased foraging intensity increases energy intake, which is useful for growth and reproduction but comes at the cost of higher mortality risk due ... -
Life-history implications of the allometric scaling of growth
(Peer reviewed; Journal article, 2014-10-21)Several phenomenological descriptions, such as the von Bertalanffy growth model, have been widely used to describe size-at-age and individual growth across a diverse range of organisms. However, for modelling life histories, ... -
Lifespan extension in a semelparous chordate occurs via developmental growth arrest just prior to meiotic entry
(Peer reviewed; Journal article, 2014-04-02)It is proposed that the ageing process is linked to signaling from the germline such that the rate of ageing can be adjusted to the state of the reproductive system, allowing these two processes to co-evolve. Mechanistic ... -
Lifespan extension in a semelparous chordate Oikopleura dioica via developmental growth arrest : Roles of Target of Rapamycin (TOR) signaling and D type cyclins
(Doctoral thesis, 2015-05-22)All living organisms experience ageing during the course of their lifespan. The science of ageing has emerged into an enthralling area of research. Our knowledge of the mechanisms of ageing and reproduction has been mainly ... -
Ligandaktivering av aryl hydrokarbon reseptor 2 (AhR2) fra Atlanterhavstorsk (Gadus morhua) ved bruk av luciferase genreportersystem
(Master thesis, 2016-07-01)Aryl hydrokarbon reseptor 2 fra atlanterhavstorsk (gmAhR2) er en ligandaktivert transkripsjonsfaktor som tidligere har blitt klonet og karakterisert som xenobiotisk sensor. Ved Universitetet i Bergen er det blitt etablert ... -
Light and visual foraging in the pelagic: Opportunities and constraints along gradients of seasonality
(Doctoral thesis, 2019-04-30)Light has a twofold fundamental impact on marine ecosystems; it allows photosynthesis that is at the source of most marine food chains, but it also governs top-down control through visual foraging. Here, I focus on the ... -
Light comfort zone in a mesopelagic fish emerges from adaptive behaviour along a latitudinal gradient
(Peer reviewed; Journal article, 2019)Throughout the oceans, small fish and other micronekton migrate between daytime depths of several hundred meters and near-surface waters at night. These diel vertical migrations of mesopelagic organisms structure pelagic ... -
Light comfort zones of mesopelagic acoustic scattering layers in two contrasting optical environments
(Peer reviewed; Journal article, 2016-07)We make a comparison of the mesopelagic sound scattering layers (SLs) in two contrasting optical environments; the clear Red Sea and in murkier coastal waters of Norway (Masfjorden). The depth distributions of the SL in ... -
Light conditions during Atlantic salmon embryogenesis affect key neuropeptides in the melanocortin system during transition from endogenous to exogenous feeding
(Journal article; Peer reviewed, 2023)During the first feeding period, fish will adapt to exogenous feeding as their endogenous source of nutrients is depleted. This requires the development of a functional physiological system to control active search for ...