Blar i tittel Fakultet for biovitenskap, fiskeri og økonomi
Viser treff 905-924 av 5064
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D. Whitmarsh: Economic management of marine living resources-A practical introduction. Earthscan, London, 2011, XV+171 pp., A 24.99 pound (Paperback), ISBN 978-1-84971-259-0
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011) -
Daglig leder og styret
(Master thesis; Mastergradsoppgave, 2007-05-15)Økt fokus på Corporate Governance i de siste årene har tvunget selskaper og myndigheter og andre interessenter til å se på hvordan det er mulig å oppnå det som er god Corporate Governance. Dette fokuset er kommet etter flere større skandaler i verden, skandaler av den proporsjon at de har klart å velte hele selskaper overende, dette er selskaper av som Enron, Parmelat og Finance Credit. Et av ... -
Dagligvareshopping – plikt eller fornøyelse? : en studie av dagligvarekunder i Tromsø
(Master thesis; Mastergradsoppgave, 2008-06-05)Målet med denne studien var å få en forståelse for hva som driver kunder i Tromsø til å handle dagligvarer. Mer konkret gikk vår problemstilling ut på å identifisere motiver og følelser for dagligvareshopping, for deretter å bruke disse i en segmenteringsanalyse av dagligvarekunder. Studien tok utgangspunkt i sentrale motivasjonsteorier innen shopping. I et forsøk på å utvide den eksisterende teorien ... -
Data Envelopment Analysis for Analyzing Technical Efficiency in Aquaculture: The bootstrap methods
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-14)The paper adopts the bootstrap procedures for data envelopment analysis to analyze the technical efficiency in the Vietnam’s intensive white-leg shrimp farming. The results demonstrate that the null hypothesis of constant returns-to-scale is rejected in favor of variable returns-to-scale for the production technology. Moreover, the potential improvement is greater using bootstrapping than that ... -
Data on European seafood biomass production by country, sectors, and species in 2004–2014 and on ecological characteristics of the main species produced
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-30)In this data article, we present the 2004–2014 average European seafood production volume by production sector, country, and species. The production data originates from the Food and Agriculture Organisation of the United Nations (FAO) and covers three production sectors: Marine fisheries, marine aquaculture, and freshwater production. We present the main ecological characteristics of each species ... -
Data on European seafood biomass production by country, sectors, and species in 2004–2014 and on ecological characteristics of the main species produced
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-30)In this data article, we present the 2004–2014 average European seafood production volume by production sector, country, and species. The production data originates from the Food and Agriculture Organisation of the United Nations (FAO) and covers three production sectors: Marine fisheries, marine aquaculture, and freshwater production. We present the main ecological characteristics of each species ... -
Data Stewardship (DocEnhance)
(Conference object; Konferansebidrag, 2022) -
The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-10)The PREDICTS project—Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)—has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used this evidence base to develop global and regional ... -
Dataset on social and psychological effects of COVID-19 pandemic in Turkey
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-23)This data was gathered to investigate how individuals’ levels of intolerance to distress and instant anxiety are related to some of the behaviors that people can change in response to the COVID-19 pandemic. We present a dataset based on a four-wave survey of the social and psychological effects of the COVID-19 pandemic in Turkey (N = 2,817). Turkey was heavily impacted by the first waves of infections ... -
Daylight-driven carbon exchange through a vertically structured microbial community
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-26)Interactions between autotrophs and heterotrophs are central to carbon (C) exchange across trophic levels in essentially all ecosystems and metabolite exchange is a frequent mechanism for distributing C within spatially structured ecosystems. Yet, despite the importance of C exchange, the timescales at which fixed C is transferred in microbial communities is poorly understood. We employed a ... -
Dead or Alive; or Does It Really Matter? Level of Congruency Between Trophic Modes in Total and Active Fungal Communities in High Arctic Soil
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-08)Describing dynamics of belowground organisms, such as fungi, can be challenging. Results of studies based on environmental DNA (eDNA) may be biased as the template does not discriminate between metabolically active cells and dead biomass. We analyzed ribosomal DNA (rDNA) and ribosomal RNA (rRNA) coextracted from 48 soil samples collected from a manipulated snow depth experiment in two distinct ... -
Dealing with HIV/AIDS and poverty in fishing communities : how risky are artisanal marine fisher-folks at Elmina in Ghana?
(Master thesis; Mastergradsoppgave, 2008-05-15)The work examines the knowledgeability of fisher-folks as well as determines the extent to which their livelihood influences their susceptibility to HIV/AIDS infection. By making specific reference to fisher-folks at Elmina fishing community in the Central Province of the Republic of Ghana, it particularly challenges the hypothesis that fisher-folks are highly vulnerable to HIV/AIDS infection. The ... -
Decadal changes in distribution, abundance and feeding ecology of baleen whales in Icelandic and adjacent waters. A consequence of climate change?
(Doctoral thesis; Doktorgradsavhandling, 2016-01-15)Five species of baleen whales are regularly encountered at their feeding grounds in Icelandic waters during summer. Systematic monitoring of distribution and abundance of cetaceans in Icelandic and adjacent waters was initiated in 1987 as a part of the North Atlantic Sightings Surveys (NASS). In this thesis, the objecive is to summarize the results of these surveys in relation to changes in the ... -
Decades of Recovery From Sheep Grazing Reveal No Effects on Plant Diversity Patterns Within Icelandic Tundra Landscapes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-26)Tundra plant communities are often shaped by topography. Contrasting wind exposure, slopes of different inclination and landforms of different curvature affect habitat conditions and shape plant diversity patterns. The majority of tundra is also grazed by ungulates, which may alter topographically induced plant diversity patterns, but such effects may depend on the spatial scales of assessments. ... -
Declining willow ptarmigan populations : the role of habitat structure and community dynamics
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)The recent range contractions and population declines of many grouse species worldwide have been attributed to loss and fragmentation of their habitats, although the empirical evidence for the actual drivers is often weak. In case of the willow ptarmigan Lagopus lagopus in Fennoscandia, ungulate overbrowsing of willows has been hypothesized to exert such negative habitat-related impacts. Moreover, ... -
Decomposition in differing snow regimes in high Arctic Svalbard
(Master thesis; Mastergradsoppgave, 2019-05-29)Rapidly rising temperatures are having great effects on the high arctic ecosystem, historically characterized by long, cold winter periods, and cold dry summers. Due to the length of the winter season, arctic soils have been an important carbon sink, but may now be facing increased microbial activity due to increasing temperatures. Temperature, moisture, and litter quality play important roles in ... -
Decoupling of microbial community dynamics and functions in Arctic peat soil exposed to short term warming
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-12)Temperature is an important factor governing microbe-mediated carbon feedback from permafrost soils. The link between taxonomic and functional microbial responses to temperature change remains elusive due to the lack of studies assessing both aspects of microbial ecology. Our previous study reported microbial metabolic and trophic shifts in response to short-term temperature increases in Arctic ... -
A deep dive into fat: Investigating blubber lipidomic fingerprint of killer whales and humpback whales in northern Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-01)In cetaceans, blubber is the primary and largest lipid body reservoir. Our current understanding about lipid stores and uses in cetaceans is still limited, and most studies only focused on a single narrow snapshot of the lipidome. We documented an extended lipidomic fingerprint in two cetacean species present in northern Norway during wintertime. We were able to detect 817 molecular lipid species ... -
Deep ocean particle flux in the Northeast Atlantic over the past 30 years: carbon sequestration is controlled by ecosystem structure in the upper ocean
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-16)The time series of downward particle flux at 3000 m at the Porcupine Abyssal Plain Sustained Observatory (PAP-SO) in the Northeast Atlantic is presented for the period 1989 to 2018. This flux can be considered to be sequestered for more than 100 years. Measured levels of organic carbon sequestration (average 1.88 gm<sup>−2</sup> y<sup>−1</sup> ) are higher on average at this location than at ... -
Deep-sea sponge derived environmental DNA analysis reveals demersal fish biodiversity of a remote Arctic ecosystem
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-18)The deep-sea is vast, remote, and largely underexplored. However, methodological advances in environmental DNA (eDNA) surveys could aid in the exploration efforts, such as using sponges as natural eDNA filters for studying fish biodiversity. In this study, we analyzed the eDNA from 116 sponge tissue samples and compared these to 18 water eDNA samples and visual surveys obtained on an Arctic seamount. ...