The current paper contributes to signalling theory by demonstrating the importance of digital quality signals in influencing consumer preferences for sales and segmentation in the context of marketing fresh fish online. We conducted a choice-based conjoint analysis with a latent class segmentation to analyse the significance of digital quality signals compared to traditional attributes online. The ...

Trophically transmitted parasites are known to impair fish growth in experimental studies, but this is not well documented in natural populations. For Arctic charr [<i>Salvelinus alpinus</i> (L.)], individual growth is positively correlated with food consumption. However, increased food consumption will increase the exposure to trophically transmitted parasites. Using a correlative approach, we ...

Background: High concentrations of taurine are present in the developing human brain and maternal breast milk. Taurine is thought to influence fetal growth and brain development based on experimental rodent studies. As fish is an important dietary source of taurine, we investigated associations between taurine concentrations and child outcomes in a high fish consuming population.<p> <p>Objective: ...

Nitrogen (N) is the main limiting nutrient for biological production in the Arctic Ocean. While dissolved inorganic N (DIN) is well studied, the substantial pool of N bound in organic matter (OM) and its bioavailability in the system is rarely considered. Covering a full annual cycle, we here follow N and carbon (C) content in particulate (P) and dissolved (D) OM within the Atlantic water inflow to ...

The earth is experiencing warming at a rate that challenges the adaptive capacities of many animal species. Because marine mammals can integrate and reflect ecological variation across various spatial and temporal scales, they are prime sentinels of marine ecosystem change. This thesis explores movement patterns and foraging behaviour, and the ontogeny of these behaviours, in harbour seals (Phoca ...

Det har vært en betydelig økning av antropogene lydkilder i akvatiske miljøer de siste 30 årene, deriblant seismiske undersøkelser. Seismikk er en lavfrekvent lyd som har evne til å bre seg over store områder og det er derfor knyttet bekymring til hvorvidt det kan ha negative konsekvenser for marine organismer. I dette studiet har vi undersøkt hvorvidt seismikk kan føre til atferdsendringer hos ...

The Atlantic mackerel (Scomber scombrus) has been the centre of attention in an ongoing conflict regarding management and allocation of quota since the distribution of the species changed and expanded to new areas. These changes in distribution have been linked to higher sea temperature, increasing stock size and changes in feeding opportunities. In this thesis a closer look is taken on the international ...

The salmon gill poxvirus (SGPV) is a large DNA virus that infects gill epithelial cells in Atlantic salmon and is associated with acute high mortality disease outbreaks in aquaculture. The pathological effects of SGPV infection include gill epithelial apoptosis in the acute phase of the disease and hyperplasia of gill epithelial cells in surviving fish, causing damage to the gill respiratory surface. ...

We focused on the responses of two arms of the Atlantic salmon immune system against intracellular pathogens: the antibody (Ab) production by B cells after challenge with the facultative intracellular bacterium <i>Pisciricketsia salmonis</i> and the interferon (IFN) responses in a salmonid cell line against salmon alphavirus (SAV), infectious necrotic pancreas virus (IPNV), and <i>P. salmonis</i>. ...