The increasing human presence in the Arctic shelf seas, with the expansion of oil and gas industries and maritime shipping, poses a risk for Arctic marine organisms such as the key species polar cod (<i>Boreogadus saida</i>). The impact of dietary crude oil on growth and metabolism of polar cod was investigated in the early spring (March–April) when individuals are expected to be in a vulnerable ...

Dense brittle star assemblages dominate vast areas of the Arctic marine shelves, making them key components of Arctic ecosystem. This study is the first to determine the population dynamics of the dominant shelf brittle star species, <i>Ophiura sarsii</i> and <i>Ophiocten sericeum</i>, through age determination, individual production and total turnover rate (P:B). In the summer of 2013, <i>O. ...

Intensive aquaculture practices compromise the health of fish. Probiotics especially those isolated from aquatic animals play important roles in improving fish health. The aim of the study was to evaluate the effects of stabilized fermentation product of Cetobacterium somerae (XMX-1) on the growth performance, gut and liver health of common carp. A total of 300 carps (initial weight of 2.32 ± 0.02 ...

Chlorella vulgaris is a freshwater microalga that synthesises large amounts of saturated lipids, which makes it suitable for production of bioenergy and biofuels. Since its cultivation usually requires freshwater, it competes with agriculture, economic development and ecological conservation for this limited natural resource. This study investigated the possibility of the partial replacement of ...

Etter flere år med stor vekst og ekstraordinær avkastning i næringen, har regjeringen besluttet å innføre grunnrenteskatt på havbruk. Naturgitte privilegium i kombinasjon med reguleringer gir dermed kilde til grunnrente i næringen. Staten ønsker å innhente deler av grunnrenten, uten å påføre en redusering av effektivitet og verdiskapning. Prosessen rundt innføringen har vært preget av usikkerhet, ...

Norsk oppdrettsnæring opplever i dag et globalt marked som etterspør stadig mer atlantisk laks (Salmo salar L.), men etterspørselen har de siste årene ikke blitt møtt med en tilsvarende økning i produksjonen. I en tid preget av et stort fokus på miljø og bærekraft, har det for oppdrettere og politikere vært vanskelig å snakke om en produksjonsøkning, hovedsakelig grunnet lakseparasitten lakselus ...

<p><i>Purpose</i>: The purpose of this study was to investigate how a consumer’s intention to purchase a premium or luxury product influences the anticipated regret and guilt.</p> <p><i>Design/methodology/approach</i>: A 2 × 2 × 2 between-subjects design (label: premium versus luxury × prior event: success versus failure × product type: hedonic versus utilitarian) on guilt and regret was ...

Enteric methane (CH4) from gut microbial fermentation of complex organic polymers in ruminants comprises an important source of the anthropogenic CH4 emissions and may also represent a significant loss of metabolic energy to the host animal depending on diet. CH4 is produced by specialized microbes called methanogens. Extensive research exists on enteric CH4 production and methanogens in domestic ...

Triploid fish may differ from diploids in a number of morphological and physiological characteristics. The present study was undertaken to examine the effects of ploidy on the gut morphology of Atlantic salmon post-smolts (Salmo salar L.). For this purpose, we compared the intestinal length (relative gut length, RGL), pyloric caeca number and mass of commercially produced diploid and triploid siblings. ...

<i>Introduction</i> - Monogeneans of the genus <i>Gyrodactylus</i> were found on the gills of specimens of the bigeye sculpin <i>Triglops nybelini</i> Jensen, 1944 caught by trawl in the Barents Sea in January–February 2016.<p> <p><i>Methods</i> - Morphological preparations of the parasites were examined and photographed under a microscope at magnifcations of×100–1000 and morphometric analyses ...