Blar i Institutt for biologi på tittel
Viser treff 1687-1706 av 2612
-
Observations of lumpfish at a commercial fish farm during different water current conditions
(Master thesis, 2023)Lakselus (Lepeophteirus salmonis) er en av de største utfordringene for norsk havbruksnæring og ble beregnet til å føre med seg kostnader på rundt 6 milliarder NOK i 2019. Lakseoppdrettsnæringen bruker i dag rensefisk som ... -
OC2017 A-029 - Vannkvalitet og startfôring av rognkjeks - Effekt av fôring med levende copepoder i tidlige faser (FHF prosjekt nr 901174)
(Research report, 2017)I oppdrett av rognkjeks benyttes fonnulert tønfor av små partikler fra start, som gir mye forspill i karene. Høy og varierende organisk belastning i systemet gir grobunn for oppblomstring av opportunistiske bakterier ... -
Occurrence and Habitat Characteristics of Aurelia sp. Polyps in a High-Latitude Fjord
(Peer reviewed; Journal article, 2021)Causes and consequences of jellyfish bloom formation are subject to controversial discussions worldwide. While medusae have been studied to a broader extent, the knowledge on polyp stages of scyphozoans is limited thus ... -
Occurrence and phenology of Aurelia aurita in the North-East Atlantic Seas
(Master thesis, 2023)Glassmaneten Aurelia aurita har en global utbredelse og er en av de mest studerte artene i klasse Scyphozoa. Likevel er maneter i høy grad oversett og forholdsvis lite studert hittil. Aurelia aurita har en kompleks ... -
Occurrence and tissue distribution of 33 legacy and novel per- and polyfluoroalkyl substances (PFASs) in Baikal seals (Phoca sibirica)
(Journal article; Peer reviewed, 2023)Per- and polyfluoroalkyl substances (PFASs) are bioaccumulative and associated with adverse effects in both wildlife and humans. The occurrence of 33 PFASs was assessed in the plasma, liver, blubber, and brain of 18 Baikal ... -
Occurrence of Bisphenols and Benzophenone UV Filters in White-Tailed Eagles (Haliaeetus albicilla) from Smøla, Norway
(Journal article; Peer reviewed, 2021)There is a growing concern about the occurrence of bisphenols and benzophenone UV filters in natural ecosystems, while data are limited regarding their actual occurrence in wildlife species, especially in raptors. In this ... -
Occurrence of perfluorinated alkylated substances (PFASs) and evaluation of potential genotoxic effects in small rodents from a skiing area, Granåsen, Norway
(Master thesis, 2018)The aim of the project is to sample small mammals from Granåsen, a PFAS hotspot area, and compare them to the population of Jonsvatnet, chosen as a reference area. -
Occurrence of PPCPs and Pesticides in the Wastewater from Ny- Ålesund and in the Sediments inKongsfjorden: Environmental Fate and Ecotoxicological risks
(Master thesis, 2024)Legemidler, personlige pleieprodukter og pesticider kan påvirke organismer de ikke er rettet mot når de havner i det marine miljøet. Renseanlegget i Ny- Ålesund regnes som hovedkilden for utslipp av disse stoffene i ... -
Occurrence, identification and characterization of plastic pollution from an open solid waste dumpsite in Calabar, Southern Nigeria
(Peer reviewed; Journal article, 2023)Landfills and dumpsites are the final point of solid waste deposition and management in developing countries due to lack of recycling methods. Herein, we have investigated the occurrence, polymer composition and characterization ... -
Ocean acidification ameliorates harmful effects of warming in primary consumer
(Journal article; Peer reviewed, 2018)Climate change-induced warming and ocean acidification are considered two imminent threats to marine biodiversity and current ecosystem structures. Here, we have for the first time examined an animal's response to a complete ... -
Ocean acidification and molluscan shell taphonomy: Can elevated seawater pCO2 influence taphonomy in a naticid predator–prey system?
(Journal article; Peer reviewed, 2018)The size and frequency of gastropod drill holes in shells of their prey are common indicators of predator-prey ecology in the fossil record. Taphonomic processes occurring after predation, however, can influence the ... -
Ocean acidification causes no detectable effect on swimming activity and body size in a common copepod
(Journal article; Peer reviewed, 2017)Ocean acidification can impair an animal’s physiological performance and energetically demanding activities such as swimming. Behavioural abnormalities and changed activity in response to ocean acidification are reported ... -
Ocean Acidification Effects on Atlantic Cod Larval Survival and Recruitment to the Fished Population
(Journal article; Peer reviewed, 2016)How fisheries will be impacted by climate change is far from understood. While some fish populations may be able to escape global warming via range shifts, they cannot escape ocean acidification (OA), an inevitable consequence ... -
Ocean climate and egg investment in the black-legged kittiwake Rissa tridactyla.
(Journal article; Peer reviewed, 2017)Birds allocate substantial resources to their eggs during the laying period, resources also needed for other concurrent costly processes such as mate acquisition, nest building and site defence. Egg and clutch sizes may ... -
Ocean Colour and Phytoplankton Dynamics - An examination of the Forel-Ule scale in a modern context
(Master thesis, 2017)The Forel-Ule scale as a method of determining ocean colour has been in use for over 100 years. Ocean colour is a result of inherent optical properties (IOP) in the water, including phytoplankton biomass, coloured dissolved ... -
Offspring fitness and the optimal propagule size in a fluctuating environment
(Journal article; Peer reviewed, 2018) -
Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar)
(Journal article; Peer reviewed, 2013)Classic offspring-size theory predicts that a single level of investment per offspring maximizes parental reproductive success in a given environment. Yet, substantial variation in offspring size is often observed among ... -
Oil from transgenic Camelina sativa containing over 25 % n-3 long-chain PUFA as the major lipid source in feed for Atlantic salmon (Salmo salar)
(Journal article; Peer reviewed, 2018)Facing a bottleneck in the growth of aquaculture, and a gap in the supply and demand of the highly beneficial n-3 long-chain PUFA (LC-PUFA), sustainable alternatives to traditional marine-based feeds are required. Therefore, ... -
Oil-mediated oxidative-stress responses in a keystone zooplanktonic species, Calanus finmarchicus
(Peer reviewed; Journal article, 2022)The copepod Calanus finmarchicus is an ecologically important species in the North Atlantic, Norwegian and Barents seas. Accidental or continuous petroleum pollution from oil and gas production in these seas may pose a ... -
Oksygenforbruk, stressrespons og stress under Aqui-S sedasjon hos bergnebb (Ctenolabrus rupestris) i transportrelaterte forsøk
(Master thesis, 2011)Dagens problem med lakselus på atlantisk laks (Salmo salar) er betydelig, og bakgrunn for store økonomiske tap. Fiskeridirektoratet anslår at 80 % av tap i matproduksjon av atlantisk laks er forårsaket av lakselus. ...