Browsing Department of Biological Sciences by Title
Now showing items 641-660 of 2290
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Effects of nuisance submerged vegetation on the fauna in Norwegian rivers
(Journal article; Peer reviewed, 2021)The abundance of aquatic vegetation is increasing in rivers and lakes worldwide. The aim of this study was to find how the macrophyte Juncus bulbosus Linnaeus affects salmonids and benthic macroinvertebrates in Norwegian ... -
Effects of perceived predation risk on extra-pair mating in blue tits (Cyanistes caeruleus)
(Master thesis, 2017-10-28)Trivers’ theory of sexual conflict in parental investment has laid the groundwork for immense quantities of research, especially within the avian taxa. Although male benefits of extra-pair copulation (EPC) are argued to ... -
The effects of persistent organic pollutants (POPs) on the steroidogenesis in the mouse Y1 adrenocortical cell line
(Master thesis, 2015-10-01)The endocrine system refers to glands which secrets hormones that regulates a variety of physiological processes. The adrenal cortex is part of the endocrine hypothalamus-pituitary-adrenal axis, and produces and secretes ... -
Effects of rapid temperature changes on Atlantic salmon, Salmo salar, post-smolts
(Master thesis, 2017-06-28)Year round production of Atlantic salmon post-smolts in closed or semi-closed systems opens up for use of seawater from different depths, which will permit stocking of fish from closed containment system to the open sea ... -
Effects of reduced diameter of bag cultures on content of essential fatty acids and cell density in a continuous algal production system
(Peer reviewed; Journal article, 2011-02-16)Cell density and fatty acid (FA) content of Pavlova lutheri and Chaetoceros muelleri were analysed in a continuous algal production system (250-L bags) with reduced diameter. The cell density and FA content and composition ... -
Effects of reforestation and intensified land use on vascular plant species richness in traditionally managed hay meadows
(Peer reviewed; Journal article, 2003)In this study of 130 sites with different management we investigated whether vascular plant species richness is significantly reduced when traditionally managed hay meadows are abandoned and reforested. We also compared ... -
Effects of replacing fish meal with plant protein in diets for Atlantic cod (Gadus morhua L.)
(Doctoral thesis, 2009-09-18)In Northern Europe, interest in farming Atlantic cod Gadus morhua L. has increased steadily over the past decade stimulated by the decline in landings from fisheries, and the more predictable supply by hatchery reared ... -
Effects of sample handling and cultivation bias on the specificity of bacterial communities in keratose marine sponges
(Peer reviewed; Journal article, 2014-11-18)Complex and distinct bacterial communities inhabit marine sponges and are believed to be essential to host survival, but our present-day inability to domesticate sponge symbionts in the laboratory hinders our access to the ... -
Effects of seismic shooting on the lesser sandeel (Ammodytes marinus Raitt) - a field study with grab sampling and in situ video observations
(Master thesis, 2004)Seismic shooting with airguns has been conducted continuously in the North Sea for about 40 years. In the past two decades there has been conflicts of interest between Norwegian industrial trawlers fishing for sandeel and ... -
The effects of selective harvest on Japanese Spanish mackerel (Scomberomorus niphonius) phenotypic evolution
(Journal article; Peer reviewed, 2022)Japanese Spanish mackerel (Scomberomorus niphonius) is an important fish species in the China Seas with wide distribution, extensive migration, and high economic value. This species has been yielding high fisheries production ... -
The effects of selenium on methylmercury toxicity in zebrafish
(Doctoral thesis, 2014-10-31)Methylmercury (MeHg) is a potent neurotoxicant that remains a global concern. Selenium (Se) is an important micronutrient which is able to decrease MeHg toxicity, although the underlying mechanisms for this protection ... -
Effects of short term fasting on mRNA expression of ghrelin and the peptide transporters PepT1 and 2 in Atlantic salmon (Salmo salar)
(Journal article; Peer reviewed, 2021)Food intake is a vital process that supplies necessary energy and essential nutrients to the body. Information regarding luminal composition in the gastrointestinal tract (GIT) collected through mechanical and nutrient ... -
Effects of short-term starvation periods on flesh quality in Arctic charr (Salvelinus alpinus) in different seasons
(Journal article; Peer reviewed, 2020)Possible effects of short‐term starvation on flesh quality in Arctic charr were studied in spring (March) and summer (August). Groups of juvenile Arctic charr (mean weight March 536 g ± 24; August 461 g ± 15 SEM) were ... -
Effects of simulated environmental changes on growth and growth form in a late snowbed population of pohlia wahlenbergii (Web. et Mohr) Andr
(Peer reviewed; Journal article, 2003)In a factorial field experiment we increased the temperature (OpenTop Chambers) and nutrients (nitrogen, phosphorus, and potassium[NPK]) to simulate predicted future climate changes and studiedthe growth response of the ... -
Effects of storage on product quality of bivalves (oysters, scallops, and clams)
(Master thesis, 2018-12-15)The purpose of this thesis is to investigate the effects of the different storage conditions concerning quality of oysters Ostrea edulis, scallops Pecten maximus and clams Arctica islandica. Quality of bivalves is a very ... -
Effects of temperature and food availability on larval cod survival: A model for behaviour in vertical gradients
(Peer reviewed; Journal article, 2015-06-08)Recruitment success in living marine resources is variable due to high survival variability of early life stages. Improving our understanding of how environmental and ecological factors mechanistically interact and influence ... -
Effects of temperature and natural disturbance on growth, reproduction, and population density in the alpine annual hemiparasite euphrasia frigida
(Peer reviewed; Journal article, 1999)The effects of temperature and "natural disturbance" on growth, seed production, and population density in the facultative hemiparasitic annual Euphrasia frigida (Scrophulariaceae) were examined in the middle alpine zone ... -
Effects of temperature on tissue-diet isotopic spacing of nitrogen and carbon in otolith organic matter
(Peer reviewed; Journal article, 2019)Reconstruction of the trophic position of a fish can be performed by analysing stable nitrogen and carbon isotopes in otolith protein. However, ambient temperature may affect the tissue–diet isotopic spacing of stable ... -
The effects of the chemotherapeutants hydrogen peroxide, deltamethrin and azamethiphos on non-target crustaceans
(Doctoral thesis, 2021-09-16)I present new knowledge on the toxicity of three major bath treatment chemotherapeutants used in Norway. Previously, regarding the toxicity studies of hydrogen peroxide (H2O2) alone, a total of twelve non-target crustaceans ... -
Effects of the emerging marine aquafeed mycotoxins beauvericin (BEA) and enniatin B (ENNB) in Atlantic Salmon (Salmo salar) – Implications on cellular pathways and functions, and tissue responses
(Doctoral thesis, 2023-06-14)Plantebaserte fôringredienser er en kilde til mykotoksinene enniatin B (ENNB) og beauvericin (BEA) for oppdrettslaks (Salmo salar). Dette har skapt bekymring for fiskehelse og fôrsikkerhet, siden disse mykotoksinene foreløpig ...