Norges fiskerihøgskole: Recent submissions
Now showing items 121-140 of 1686
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Effects of acute and chronic handling stress on antiviral responses in Atlantic salmon (Salmo salar) red blood cells and testing of stress target genes
(Master thesis; Mastergradsoppgave, 2023-05-13)The salmonids in today’s Norwegian aquaculture are exposed to many stressors, like suboptimal water quality, crowding and handling. This project focuses on red blood cell (RBCs) function in Atlantic salmon and how cellular responses are affected by stress. Since fish RBCs are nucleated and can change their gene expression, one of the main goals of this thesis is to better understand how the ... -
Bruk av Lean som forbedringsverktøy i norsk fiskeindustri: En studie av Lerøy Seafood, avd. Melbu
(Master thesis; Mastergradsoppgave, 2021-05-13)<p>Norsk fiskeindustri har tatt i bruk både ny teknologi og nye styringsverktøy for å øke effektiviteten, forbedre utnyttelsen av råstoffet og styrke fortjenesten. Ett av styringsverktøyene som har blitt introdusert i de seinere årene er Lean. Dette er et styringsverktøy som har sitt utspring i Toyota Motor Corporation og japansk kultur. <p>Denne studien ser nærmere på hvordan Lean er satt sammen ... -
Targeted gene editing of an infectious salmon anemia (ISA)-relevant gene in salmonids cells using the CRISPR/Cas9 Ribonucleoprotein complex
(Master thesis; Mastergradsoppgave, 2022-05-10)Background: The gene editing tool, CRISPR/Cas9, can potentially be applied in aquaculture to combat some of the problems of the farmed salmon industry including infectious diseases. The RNP (ribonucleoprotein)-based CRISPR/Cas9 strategy has recently been shown to be efficient in gene editing in diverse cell lines and organisms. Application of RNP strategy in salmon cell biology is still at its ... -
Permagov D3.2 Report on the Development of Diagnostic Tool: An overview of PERMAGOV’s tool co-development process
(Research report; Forskningsrapport, 2024)Institutional barriers are critical obstacles to policy implementation. Such barriers hamper the performance of marine policies and may also limit the potential for adapting governance arrangements in order to improve policy performance. Instigating transformation within longstanding governance arrangements is very challenging and is often hampered by institutional barriers such as path dependency, ... -
Effect of Calanus finmarchicus Hydrolysate Inclusion on Diet Attractiveness for Whiteleg Shrimp (Litopenaeus vannamei)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-13)Shrimp feed formulations have moved towards less fish meal and more of the readily available and cheaper plant proteins. To counteract the lower attractiveness and palatability of plant proteins, feeds are supplemented with ingredients known to have chemoattractive properties that will increase feed intake. This study investigated the putative chemoattractive effect of Calanus finmarchicus hydrolysate, ... -
Mitogenomic evidence of population differentiation of thorny skate, Amblyraja radiata, in the North Atlantic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-25)Management of thorny skate (Amblyraja radiata) in the Northwest Atlantic has posed a conservation dilemma for several decades due to the species' lack of response to strong conservation efforts in the US Gulf of Maine and the Canadian Scotian Shelf, confusion over the relationship between two reproductive size morphs of differing life histories that are sympatric in the Northwest Atlantic, and ... -
Retrieval operations of derelict fishing gears give insight on the impact on marine life
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-16)Abandoned, lost and discarded fishing gear (ALDFG), significantly impacts marine ecosystems and biodiversity by incidental capture known as ghost fishing. Such impacts were quantified during the Norwegian Directorate of Fisheries' annual ALDFG cleanup operation in September 2023 by examining the characteristics of retrieved ALDFG and recording the taxonomically sorted catch abundance and biomass. A ... -
Global consortium for the classification of fungi and fungal-like taxa
(Journal article; Tidsskriftartikkel, 2023-12-12)The Global Consortium for the Classification of Fungi and fungus-like taxa is an international initiative of more than 550 mycologists to develop an electronic structure for the classification of these organisms. The members of the Consortium originate from 55 countries/regions worldwide, from a wide range of disciplines, and include senior, mid-career and early-career mycologists and plant pathologists. ... -
Fasting and its implications for fish welfare in Atlantic salmon aquaculture
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-20)Periods of fasting occur for a multitude of reasons in Atlantic salmon aquaculture. Feed withdrawal is widely used prior to transport, parasite treatments, preslaughter and for depuration purposes in recirculating aquaculture systems. Voluntary fasting is a coping response when fish have poor health or are exposed to poor farm environments. Owing to increased attention to animal welfare in aquaculture, ... -
Exploring the gap between top-down sustainability objectives and perceived local sustainability challenges – the case of Senja Municipality
(Master thesis; Mastergradsoppgave, 2023-08-14)Achieving social, environmental, and economic sustainability has become the aim of nations and organizations across the globe. One of the attempts to operationalize sustainability is through the integration of the sustainable development goals in coastal governance. However, the perceived characteristics of challenges for sustainability, and thus also solutions to them, may differ depending on the ... -
A Novel Biosurfactant-Based Oil Spill Response Dispersant for Efficient Application under Temperate and Arctic Conditions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-15)Synthetic oil spill dispersants have become essential in offshore oil spill response strategies. However, their use raises significant concerns regarding toxicity to phyto- and zooplankton and other marine organisms, especially in isolated and vulnerable areas such as the Arctic and shorelines. Sustainable alternatives may be developed by replacing the major active components of commercial dispersants ... -
Overskudd og ressursrente -mer for Nord-Norge?
(Chapter; Bokkapittel, 2023)Artikkelen beskriver utviklingen i fiskeri- og havbruksnæringen i Nord-Norge, med spesiell vekt på Finnmark og Nord-Troms. Norsk økonomisk sone har her det biologiske grunnlaget for landets viktigste fiskerier. Fiskeriene har gått fra å være en åpen næring til en lukket og eksklusiv «klubb». Konsekvensene for næringen i Nord-Norge har vært sentralisering i færre enheter og svekking av mange lokalsamfunn. ... -
Simple pot modification improves catch efficiency and species composition in a tropical estuary mud crab (Scylla serrata) fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-08)Pots are widely used fishing gear type for targeting different crustacean and fish species. Pot entrance size and design are among the most important technical parameters that influence the catch efficiency of certain species. An optimal pot entrance design should allow an efficient entry for the target species while preventing subsequent escape. The tropical estuary pot fishery targeting mud crab ... -
Impact of ground gear design on catch efficiency in demersal trawl fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-03)The choice of ground gear design in demersal trawls can significantly affect both catch composition and efficiency. The preference for a specific design depends on the fishing ground. In the North-Eastern Mediterranean, two types of ground gears, Single Line and Double Line are commonly used. Therefore, this study compared the catch performance for trawls using these ground gears during research ... -
Effect of artificial lights on catch efficiency and capture patterns in Asian paddle crab (Charybdis japonica) gillnet fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-22)The gillnet fishery targeting Asian paddle crab (Charybdis japonica) is an important commercial fishery in the Yellow Sea of China. However, low catch rates represent a challenge, and solutions for improving the catch efficiency are crucial for economical sustainability in this fishery. Therefore, we tested whether the use of artificial fishing lights could improve gillnet catch performance. ... -
Testing of hook sizes and appendages to reduce yelloweye rockfish bycatch in a Pacific halibut longline fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-03)In Pacific halibut (Hippoglossus stenolepis) longline fisheries in the eastern North Pacific Ocean bycatch of yelloweye rockfish (Sebastes ruberrimus) is a concern as their stock status along the U.S. West Coast is “rebuilding” from being “overfished”, the southeast Alaska stock has shown a ∼60% decline since at least 1994 and through 2015 where it stabilized, and the Canadian stock has been recently ... -
Comparison of physical properties and fishing performance between biodegradable PLA and conventional PA trammel nets in grey mullet (Mugil cephalus) and red-lip mullet (Liza haematocheila) fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-16)Marine plastic pollution and continuous capture of marine animals, so-called “ghost fishing”, by abandoned, lost, or otherwise discarded fishing gear (ALDFG) are global concerns. This study investigated whether biodegradable polylactic acid (PLA) monofilaments can be used to replace conventionally used non-biodegradable polyamide (PA) in trammel net fishery for limiting ALDFG associated effects. It ... -
Sea, fish, and resource management in the High North
(Chapter; Bokkapittel, 2023)With more than five times the land area of the kingdom, Norway’s oceans extend from 55 degrees north in the North Sea to 85 degrees north in the Arctic Ocean north of Svalbard – a distance of more than 3,000 kilometres. More than 80 per cent of these sea areas lies to the north of the Arctic Circle. As for natural resources, these sea areas are very productive and sustain large commercial fisheries. ... -
The gift of community
(Book; Bok, 2023)This book is a followup, or a continuation rather, of the one I published in 2019 as part of the Too Big To Ignore (TBTI) Global Book Series, titled ‘Life Above Water: Essays on Human Experiences of Small-Scale Fisheries’. The design and purpose of the current book are the same. The introduction in the 2019 book could also work here, even if this book has a sharper focus on communities. Both consist ... -
Comparative assessment of Chinese mitten crab aquaculture in China: Spatiotemporal changes and trade-offs
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-12)The increasing human demand for high-quality animal protein has provided impetus for the development of aquaculture. Chinese mitten crab (Eriocheir sinensis) is a catadromous species rapidly being cultured in China but scientific literature documenting its life cycle environmental and economic consequences remains scarce. This study aims to address this gap by examining the spatio-temporal evolution ...