Browsing Department of Biological Sciences by Title
Now showing items 447-466 of 2235
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Development of the adaptive immune system in ballan wrasse (Labrus bergylta) and the impact of different start-feed diets
(Doctoral thesis, 2024-01-19)Berggylt (Labrus bergylta) spiser hovedsakelig bløtdyr, pigghuder og krepsdyr, der også ektoparasitter som plukkes fra andre fisker kan nyttes. Denne egenskapen har ført til at berggylt nå er brukt som rensefisk innen ... -
Development of the salmon louse Lepeophtheirus salmonis parasitic stages in temperatures ranging from 3 to 24°C
(Peer reviewed; Journal article, 2019-09-05)The development rate of the salmon louse Lepeophtheirus salmonis is greatly influenced by seawater temperature. This study describes how the growth rate of L. salmonis changes with temperature and identifies the extreme ... -
Development stage distribution as a proxy for feeding success and growth for first feeding Norwegian spring spawning herring larvae
(Journal article; Peer reviewed, 2020)The estimation of growth rates in young herring larvae (Clupea harengus) in the field can be difficult because the primary increments in the otoliths may not be discernible or formed at a daily level. Likewise, the estimation ... -
The developmental basis for the evolution of new morphologies in Spiralia
(Doctoral thesis, 2020-11-20)Spiralia is a clade of bilaterally symmetrical animals, which display an extreme diversity of divergent body plans accompanied by the presence of multiple subclades- specific morphological and developmental characters. ... -
Developmental RNA-Seq transcriptomics of haploid germ cells and spermatozoa uncovers novel pathways associated with teleost spermiogenesis
(Journal article; Peer reviewed, 2022)In non-mammalian vertebrates, the molecular mechanisms involved in the transformation of haploid germ cells (HGCs) into spermatozoa (spermiogenesis) are largely unknown. Here, we investigated this process in the marine ... -
Developmental stages of the ballan wrasse from first feeding through metamorphosis: Cranial ossification and the digestive system
(Journal article; Peer reviewed, 2022)We have described six developmental stages for the ballan wrasse, from the first feeding until the juvenile stage, supported by specific descriptions of cranial ossification, maturation of the digestive tract, and ... -
Diatom frustules as a biomaterial: effects of chemical treatment on organic material removal and mechanical properties in cleaned frustules from two Coscinodiscus species
(Peer reviewed; Journal article, 2016-08)The three-dimensional structure of silica diatom frustules offers a great potential as nanoporous material for several nanotechnological applications, but the starting point for these applications is the ability to obtain ... -
Diel vertical migration and feeding pattern of M. muelleri in Masfjorden in late autumn
(Master thesis, 2009-03-20)The purpose of this study was to investigate diel vertical migration, feeding pattern and diet composition of mesopelagic fish Maurolicus muelleri in Masfjorden in late autumn and compare these with the previous studies. ... -
Diet affects the redox system in developing Atlantic cod(Gadus morhua) larvae
(Peer reviewed; Journal article, 2015-08)The growth and development of marine fish larvae fed copepods is superior to those fed rotifers, but the underlying molecular reasons for this are unclear. In the following study we compared the effects of such diets on ... -
The diet of juvenile Atlantic mackerel (Scomber scombrus) feeding in new northern nursery areas along the Norwegian coast
(Journal article; Peer reviewed, 2022)The North-east Atlantic mackerel stock size increased substantially from 2006–2014 coinciding with high recruitment. This resulted in a pronounced northerly geographic expansion of mackerel, followed by an influx of juvenile ... -
Dietary fatty acids and their ratio: impact on Atlantic salmon health, mineral status and intestinal lipid transport
(Doctoral thesis, 2022-06-30)The rapid growth of the aquaculture industry and the sharp decline of capture fisheries necessitates finding alternative sources for fish oil and fish meal in aquafeeds. However, the inclusion of VOs in aquafeed alters the ... -
Dietary histidine supplementation prevents cataract development in adult Atlantic salmon, Salmo salar L., in seawater
(Peer reviewed; Journal article, 2010-11)The aim of the present study was to investigate the cataract preventive effect of dietary histidine regimes in adult Atlantic salmon (Salmo salar L.) in seawater, both through manipulating the dietary histidine level and ... -
Dietary inclusion of peptides and the effect on the regional expression of the oligo-peptide transporter PepT1 (Slc15a1) in the intestine of juvenile Atlantic cod (Gadus morhua)
(Master thesis, 2008)PepT1 (Peptide Transporter 1, SLC15A1) is a proton-coupled peptide transporter responsible for uptake of short peptides and peptide-like drugs from the intestinal lumen into enterocytes. A PepT1-type transporter has recently ... -
Dietary lipid modulation of intestinal serotonin in Ballan wrasse- Labrus bergylta – In vitro analyses
(Master thesis, 2018-09-04)Salmon lice infections by Lepeophtheirus salmonis represent one of the biggest challenges for the salmon industry. Intensive use of chemical delousing methods has led to resistance in lice against several of the chemicals, ... -
Dietary methylmercury alters the proteome in Atlantic salmon (Salmo salar) kidney
(Peer reviewed; Journal article, 2011-12-19)Background: Methylmercury (MeHg) is an environmental contaminant most known for its severe neurotoxic effects. Although accumulation of MeHg tends to be several folds higher in kidney compared to other tissues, studies on ... -
Dietary selenium required to achieve body homeostasis and attenuate pro-inflammatory responses in Atlantic salmon post-smolt exceeds the present EU legal limit
(Journal article; Peer reviewed, 2020)Selenium (Se) supplementation either as inorganic or organic form was evaluated in Atlantic salmon post-smolt in vivo and in vitro. The basal diet was formulated to be low in fish meal and contain 0.24 mg Se kg−1; six other ... -
Dietary zinc, selenium and water temperature during early seawater phase influences the development of vertebral deformities and cataract in adult Atlantic salmon
(Journal article; Peer reviewed, 2023)The impact of dietary trace minerals (TM; zinc and selenium) and water temperature during early seawater phase on the development of vertebral deformities and cataracts in adult Atlantic salmon was studied. Two experimental ... -
Diets of gadoid fish in Arctic waters of Svalbard fjords during the polar night
(Journal article; Peer reviewed, 2023)As the climate warms, boreal fish species are expected to expand into the Arctic domain. Though water temperature is an important factor driving expansion of aquatic species, other variables may play a critical role in ... -
Differences in growth and survival between cod Gadus morhua and herring Clupea harengus early stages co-reared at variable prey concentrations
(Peer reviewed; Journal article, 2015-09-28)It was hypothesized that the survival and growth strategies of herring Clupea harengus, displaying a flexible reproductive activity, are adapted to coping with longer periods of prey deprivation (i.e. more variable prey ... -
Differences in metabolic rate between two Atlantic cod (Gadus morhua) populations estimated with carbon isotopic composition in otoliths
(Journal article; Peer reviewed, 2021)The isotopic composition of inorganic carbon in otoliths (δ13Coto) can be a useful tracer of metabolic rates and a method to study ecophysiology in wild fish. We evaluated environmental and physiological sources of δ13Coto ...