This study investigates the level and determinants of technical efficiency for a sample of gilnnet fishing vessels operating in Da Nang in 2009 by using a stochastic production frontier, which involved the simultaneous estimation of a translog stochastic frontier model and a model for vessel-specific technical inefficiencies. Furthermore, the other important determinants of this fleet were also ...

This paper looks into the preservation methods available to the small scale smoked and salted sun-dried fish processor in the Nzema East district of Ghana. The paper also examines the effect of fuel wood performance on the quality of smoked fish in producing the preferred fish texture and taste to meet consumer demand; assess the profitability of small scale smoked fish processing; and compare smoked ...

As mucosal barriers in fish are the main sites where pathogens are encountered, mucosal immunity is crucial to avoid infection in the aquatic environment. In teleost fish, immunoglobulins are present in gut, gill and skin mucus, although not in the same amounts as in higher vertebrates. In mammals, the poly-Ig receptor (pIgR) is synthesized in epithelial cells and mediates the active transport ...

The exploration of cold-adapted microalgae offers a wide range of biotechnological applications that can be used for human, animal, and environmental benefits in colder climates. Previously, when the polar marine microalga <i>Chlamydomonas malina</i> RCC2488 was cultivated under both nitrogen replete and depleted conditions at 8°C, it accumulated lipids and carbohydrates (up to 32 and 49%, respectively), ...

Sympatriske morfer av litoral- og profundal røye (Salvelinus alpinus) fra Skogsfjordvatn, Troms (70°N) ble undersøkt for å finne temporale forskjeller i reproduksjonsutviklingen. Feltarbeidet pågikk høsten 2011 hvor fisken ble samplet for blod og gonadeprodukter hver måned fra august til og med desember. Blodplasma ble analysert for steroide kjønnshormoner (Estradiol-17β (E2) og 11-ketotestosteron ...

The North Sea brown shrimp (<i>Crangon crangon</i> Linnaeus, 1758) fishery became Marine Stewardship Council (MSC) certified in 2017. As part of the certification, the fishermen proposed to incrementally increase the mesh size of the codend used from 22 mm to 26 mm. As this increase in mesh size could result in a substantial loss of marketable sized brown shrimp (shrimp with total length equal or ...

This thesis has tested the Farm-Retail price transmission for Norwegian salmon exports to France. By the use of public data for farm level price in Norway, export level price in Norway, retail level price in France, transportation costs and currency exchange rates the price transmission for the Norway-France value chain has been investigated. Tests of asymmetric price transmission were also conducted. ...

The present study investigated how the concentration of PUFA in blood and muscle of Atlantic salmon (<i>Salmo salar</i> L.) changed when fed 4 diets containing very different amounts of LC-PUFA in fresh water for 84 days. The n-3 LC-PUFA constituted 4.4, 24.2, 18.4, and 51.5% of the total fatty acids in the diets made with rapeseed oil, anchoveta oil, a combination of rapeseed oil (60%) and anchoveta ...

Sei er et kjent og kjært produkt for oss nordmenn, og er vel så populært som torsk til middagsmat. Det meste av seien brukes til produksjon av klippfisk og tørrfisk, mens noe selges i norske butikker som fileter, hel fisk eller frosne fileter. I de internasjonale markedene er det derimot ikke vanlig å finne sei i ferskvaredisker. Spania er blant de landene som spiser mest fisk årlig og verdsetter ...

Decisions about the optimal use of coastal and marine resources must be taken under high uncertainty about environmental impacts and may conflict with public perception of the risk associated with current blue growth initiatives. In a discrete choice experiment conducted in valuation workshops in five communities in Arctic Norway, we examine public preferences for various aquaculture expansion paths. ...