Fakultet for biovitenskap, fiskeri og økonomi
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Fakultet for biovitenskap, fiskeri og økonomi
Sub-communities within this community
- Handelshøgskolen i Tromsø [140]
- Institutt for arktisk og marin biologi [127]
- Norges fiskerihøgskole [259]
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Foley, Naomi; Armstrong, Claire W. (Journal article; Tidsskriftartikkel, 2010)[+][-]
Abstract: Despite the growing scientific literature on cold-water corals (CWC) there appears to be no studies that address the economic values or economic management of the resource. This paper presents an overview of the goods and services of CWC and their associated biodiversity. Use and non-use values associated with CWC are presented, and the methods relevant for assessing their valuation are discussed. The impact of human induced disturbance on CWC is reviewed, in order to indicate how knowledge of CWC values can be used by policy makers in the management of CWC as a habitat and vehicle for biodiversity. URI: http://hdl.handle.net/10037/3813 File(s) in this item: 1
article.pdf (419.4Kb) -
Jakobsen, Jonas (Master thesis; Mastergradsoppgave, Nov-2011)[+][-]
Abstract: The introduction of new hosts into new habitats can bring along hitchhiking parasites, i.e. parasites being introduced with the host. This in particular can be an important dispersal mechanism for autogenic parasites that are otherwise restricted by the natural movement of their fish hosts. In this study, the effect of a local host introduction on the parasite communities of three-spined sticklebacks in two subarctic lakes, was examined by comparing the parasite communities of the “introduced” (Takvatn), versus that of the “founder” (Sagelvvatn) population. Seasonal variation and inter-lake differences in abundance was also integrated in the study. The study revealed great similarity between the parasite communities du to similar ecosystems, close geographical proximity, and the facts that the only two autogenic stickleback specialists present in the systems had been introduced with its host. The subtle differences in parasite species richness were explained by accidental infections of parasites of sympatric fish species. URI: http://hdl.handle.net/10037/3812 File(s) in this item: 1
thesis.pdf (4.216Mb) -
Luan, Lan (Master thesis; Mastergradsoppgave, 28-Dec-2011)[+][-]
Abstract: Atlantic salmon export plays an important role in the total Norwegian seafood export. EU countries are currently the main markets for Norwegian salmon export. China is one of the countries which are expected to have an increased demand for Norwegian salmon. Norwegian fresh salmon exporters are currently facing the trade barriers with respect to new inspection regime and high transportation costs when they export fresh salmon to China. This study is investigating whether Coolnova salmon, fresh frozen salmon using proton magnetic freezing technology, may break the trade barriers of Norwegian fresh salmon export to Mainland China. Firstly is the meaning of preferred fresh quality of Norwegian Atlantic salmon and secondly is the potential market value of the Coolnova salmon for the wholesalers and the supermarket in Hong Kong estimated. A sample of fresh chilled, Coolnova and frozen salmon fillets were tested by wholesalers and supermarket managers who gave their quality judgement recorded in a questionnaire. Different perceptions and attitudes were expressed related to both quality factors like fatness and colour influenced by the different fish feeding, sizes and fillet cuts of the tested salmon samples as well as factors related to the application of novel freezing and thawing technologies where Coolnova salmon has its advantage. The results show that freshness is a preferred product attribute of salmon characterized by appearance as a distinctive orange colour, clear white oil lines and a hard texture and smooth and juicy taste. The results indicate that Coolnova salmon after fresh-frozen and thawed, may satisfy the markets requirements for freshness and furthermore gain a cost advantage by the opportunity to move distribution from an expensive fresh airfreight to a low cost frozen sea freight. Frozen salmon can be kept in freezers for a long time without quality degradation and would thereby not be affected by the new quality inspection regime which hampers the fresh fish import to China. Coolnova salmon can thus break the trade barrier of Norwegian fresh quality salmon imposed by the Chinese government. URI: http://hdl.handle.net/10037/3810 File(s) in this item: 1
thesis.pdf (1.039Mb) -
Tandberg, Anne Helene S. (Doctoral thesis; Doktorgradsavhandling, 19-Dec-2011)[+][-]
Abstract: The Amphipod-genus Metopa is a relatively large genus, with currently 55 accepted species. This PhD thesis consists of redescriptions of 23 of these species based on typespecimens or specimens collected and identified by the original authors; this has been done to create consistent descriptions that could form a basis for a phylogenetic analysis of Metopa. For some species Scanning Electron Microscopy has been used to look for characters that have been overlooked by the original authors. The redescriptions are presented in 3 papers (Papers 1-3), with a phylogenetic analysis of 37 Metopa species (mostly based on personal examinations, but 6 based on literature-information) together with 6 Stenula species (partly based on literature, but most from examinations performed by Dr. Traudl Krapp-Schickel) presented in a manuscript (Paper 6). The result of the phylogenetic analysis is two clear clades (A and B), both including species from both original genera. This result could suggest a thorough change in stenothoid systematics, with the possible synonymization of Stenula into the older Metopa and erection of one or more new genera to include the species of clade A, but we have argued against doing this before further investigations have been undertaken. The stability of the resulting phylogeny is discussed, and in our opinion further studies are necessary to strengthen the conclusions reached here, before we formally make the necessarily very extensive nomenclatorial changes. However, the indications that Metopa and Stenula are paraphyletic are strong. Two papers (Papers 4-5) examine the ecology of Metopa species associated with mollusks. Paper 4 is a short note about findings of Metopa alderii inside the mussel Musculus spp., whereas Paper 5 is a more thorough discussion on the possible life history strategies for Metopa glacialis in its well known association with the mussel Musculus discors based on data collected by Svalbard. We show the presence of more than one broods in several examined mussels, and from the brood sizes and cohort compositions we suggest two possible scenarios: 3 or more seasons of single broods and parental care over more than 1 year after hatching, or multiple broods in one season and extended parental care. The introductory synthesis to the papers gives a short discussion of the papers, in addition to a historical introduction to both taxonomy and the amphipod-genus Metopa. A complete list of taxa that at some time have been included in Metopa is presented, this includes synonymies and references to the auctors and different authors who have moved the different taxa. There is also a table with biogeographical information about the genus, and the ecology of Metopa is discussed. A short discussion on molecular methods and the possible ways to ensure more data for a better phylogenetic analysis is also included. Description: The papers of this thesis are not available in Munin.
1. Tandberg, A.H.S. and Vader, W.: 'A redescription of Metopa species (Amphipoda, Stenothoidae) based on the type material. 1. Zoological Museum, Copenhagen (ZMUC)', Zootaxa (2009) 2093:1-36. Available at http://www.mapress.com/zootaxa/
2. Tandberg, A.H.S.: 'A redescription of Metopa species (Amphipoda, Stenothoidae) based on the type material. 2. The United States National Museum of Natural History (NMNH)', Zootaxa (2009) 2309:43-68. Available at http://www.mapress.com/zootaxa/
3. Tandberg, A.H.S.: 'A redescription of Metopa species (Amphipoda, Stenothoidae) based on the type material. 2. The Natural History Museum Oslo (NHM)', Zootaxa (2010) 2465:1-94. Available at http://www.mapress.com/zootaxa/
4. Tandberg, A.H.S., Schander, C. and Pleijel, F.: 'First record of the association between the amphipod Metopa alderii and the bivalve Musculus', Marine Biodiversity Records (2010) 3, e5. Available at http://dx.doi.org/10.1017/S1755267209991102
5. Tandberg, A.H.S., Vader, W. and Berge, J.: 'Metopa glacialis : an analysis of its ecology and its association with Musculus discors', Polar Biology (2010) 33:1407-1418. Available at http://dx.doi.org/10.1007/s00300-010-0833-9
6. Tandberg, A.H.S. and Vader, W.: 'Phylogenetic analysis of the stenothoid genera Metopa and Stenula (Crustacea, Amphipoda, Stenothoidae)' (manuscript)URI: http://hdl.handle.net/10037/3808 File(s) in this item: 1
thesis.pdf (35.46Mb) -
Johnsen, Jahn Petter (Journal article; Tidsskriftartikkel; Peer reviewed, 2005)[+][-]
Abstract: Controlling the expansion of capture capacity has been a major challenge for the fisheries management systems around the North Atlantic. Despite focused attempts to reduce this capacity in recent years in different jurisdictions, it has continued to expand. This chapter uses a case study of changes in Norwegian fisheries to help explain why this has happened. The article supports the replacement of the rational actor approach that is currently hegemonic within fisheries management by a relational approach to the analysis of capture capacity expansion. A relational approach offers new insights into the ways political, economic, and technological forces continue to fuel capacity expansion within fishing. By use of this approach the article describes how the harvest machinery comes into existence. Keywords: Fishery policy; Capture capacity expansion; Management models; Cod fisheries; Harvest machinery URI: http://hdl.handle.net/10037/3807 File(s) in this item: 1
article.pdf (187.8Kb)
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