English
norskArtikler, rapporter og annet (Norges fiskerihøgskole): Recent submissions
Now showing items 141-160 of 931
-
Peptides from the Sea Anemone Metridium senile with Modified Inhibitor Cystine Knot (ICK) Fold Inhibit Nicotinic Acetylcholine Receptors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-30)Nicotinic acetylcholine receptors (nAChRs) play an important role in the functioning of the central and peripheral nervous systems, and other organs of living creatures. There are several subtypes of nAChRs, and almost all of them are considered as pharmacological targets in different pathological states. The crude venom of the sea anemone Metridium senile showed the ability to interact with ... -
Nanofiltration of intake water in RAS: Effect on fish performance, health and welfare
(Research report; Forskningsrapport, 2022)The experiment tested the effect of nanomembrane filtration in RAS on the salmon's physiology, welfare and growth. A specially designed membrane was used to remove sulphate from seawater and to adjust salinity from 32 to 12 ‰. A RAS where salinity was adjusted to 12 ‰ by mixing raw seawater and freshwater was used as control. The fish were kept in the two systems for 10 weeks before being ... -
Ghost fishing gear and their effect on ecosystem services – Identification and knowledge gaps
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-09)Abandoned, lost, and discarded fishing gear (ALDFG) is claimed to be a global problem with impacts on marine animals and ecosystems, posing considerable ecological and socioeconomic challenges. Nonetheless, insufficient understanding regarding how marine ecosystem services are affected by ALDFG creates a knowledge gap that challenges a holistic estimation of the long-term economic impacts of using ... -
Trends in mussel cover, density and size at exploited and unexploited intertidal reefs in eastern South Africa
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-20)The brown mussel Perna perna is the dominant indigenous mussel along the east coast of South Africa, where it is harvested by recreational and subsistence fishers. High fishing pressure near urban areas led to declining abundance and consequently to the closure of some reefs to fishing in 1998. We estimated trends in mussel population dynamics at exploited and unexploited sites, along fixed transects, ... -
Flashing lights affect the photophysiology and expression of carotenoid and lipid synthesis genes in Nannochloropsis gaditana
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-20)Nannochloropsis gaditana is a promising microalga for biotechnology. One of the strategies to stimulate its full potential in metabolite production is exposure to flashing lights. Here, we report how N. gaditana adapts to different flashing light regimes (5, 50, and 500 Hz) by changing its cellular physiology and the relative expression of genes related to critical cellular functions. We analyzed ... -
Physical–biological interactions underlying the connectivity patterns of coral-dependent fishes around the Arabian Peninsula
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-09)Aim: Distribution patterns of lineages alone do not explain the processes underlying phylogenetic differentiation in fishes observed around the Arabian Peninsula, whose hypotheses traditionally rely on (i) Pleistocene vicariance events, (ii) successive bottlenecks, (iii) recent founder effects (iv) and large spatial gradients in physical conditions. In this study, we test the hypothesis that ... -
A new species of the rare deep-sea genus Sciadonus Garman, 1899 (Teleostei, Bythitidae) from off Brazil, with a discussion of the evolution of troglomorphism and miniaturization in the aphyonid clade
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-16)A new species of the rare, deep-sea genus Sciadonus Garman, 1899 (Bythitidae) is described based on two specimens obtained by the Brazilian R/V Alpha Crucis on the continental slope off São Paulo State, Southeastern Brazil, western South Atlantic. It differs from its congeners by the combination of the following characters: body pale lacking dark pigmentation except for on female claspers; a pair ... -
A new beardfish (Teleostei, Polymixiiformes) from the Eocene Fur Formation, Denmark
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-01)The earliest Eocene (Ypresian) Fur Formation (Denmark) is globally renowned for its exceptionally well-preserved fossils, including birds, sea turtles, insects, plants, andfishes. Fishes, albeit abundant and diverse, however, areonly superficially known and very few detailed, taxonomic studies have been realized to date. A new polymixiiformfish,Polyspinatusflueregen. et sp. nov., from the Fur Formation ... -
Species separation efficiency and effect of artificial lights with a horizonal grid in the Basque bottom trawl fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-04)Achieving effective size selectivity for different species within a fishing gear is a major challenge in mixed fisheries. Fish behaviour may be exploited to separate species into separate codends where different selective properties can then be applied. Within the Basque bottom trawl fishery such a set-up has never been tested despite species with different behaviours being present. In this study, ... -
Effect of ground gear modification on bycatch of rays in mediterranean bottom trawl fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-28)Bycatch of rays and skates in towed fishing gears represents one of the major threats to these relatively slow-growing marine species. The objective of this study was to modify ground gear in a bottom trawl fishery to increase the escape of these species during towing without associated loss of target catch. Sea trials were carried out with a research vessel in Mersin Bay, North-eastern Mediterranean. ... -
The effect of temperature on growth performance and aerobic metabolic scope in Arctic charr, Salvelinus alpinus (L.)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-06)In recent years, Arctic char populations in Iceland have declined and the objective of this experiment was to throw further light on these changes by examining the effect of temperature (5, 9, 13, 17, and 21 °C) on the survival, growth rate, metabolism, and physiological indices of juvenile Arctic charr (initial mean body mass 4.02 ± 0.8 g). Mortality was 60% at 21 °C while at lower temperatures it ... -
Impacts of Nile tilapia cage culture on water and bottom sediment quality: The ability of an eutrophic lake to absorb and dilute perturbations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-07)Environmentally sustainable aquaculture depends on accurate understanding of the impacts of aquaculture-derived organic matter (AOM) and the ability of aquaculture systems to absorb and dilute perturbations. To this end, the present study assessed the impacts of AOM from cage culture of Nile tilapia on the ecology of Lake Victoria, Kenya, using fish cages near Anyanga Beach in Siaya County from ... -
Mucosal Environment Induces Phage Susceptibility in Streptococcus mutans
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-19)Pathogenic bacteria are attracted toward mucosa, as it is their way of entry into the body. However, we know surprisingly little about the phage-bacterium interactions in the mucosal environment. Here, we explored the effect of the mucosal environment on growth characteristics and phage-bacterium interactions in Streptococcus mutans, a causative agent of dental caries. We found that although mucin ... -
Food and chemical substances relevant for monitoring - Scientific Opinion of the Scientific Steering Committee of the Norwegian Scientific Committee for Food and Environment
(Research report; Forskningsrapport, 2022-06-09) -
Matproduksjon, mattrygghet og miljø - innspill om kunnskapsbehov til gjennomføringen av det grønne skiftet - Uttalelse fra hovedkomiteen i Vitenskapskomiteen for mat og miljø (VKM)
(Research report; Forskningsrapport, 2022-11-22) -
DNA metabarcoding reveals the importance of gelatinous zooplankton in the diet of Pandalus borealis, a keystone species in the Arctic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-22)Information about the dietary composition of a species is crucial to understanding their position and role in the food web. Increasingly, molecular approaches such as DNA metabarcoding are used in studying trophic relationships, not least because they may alleviate problems such as low taxonomic resolution or underestimation of digestible taxa in the diet. Here, we used DNA metabarcoding with ... -
People do care about the deep sea. A comment on Jamieson et al. (2020)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-23)In a paper in this journal entitled “Fear and loathing of the deep sea: why don’t people care about the deep sea?”, Jamieson et al. (2020) pose this question and answer it with many interesting perspectives from psychology, ocean literacy and philosophy. However, there is an inherent assumption in the question they ask that people do not care about the deep sea. In order to assess this assumption, ... -
Metabarcoding reveals high-resolution biogeographical and metaphylogeographical patterns through marine barriers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-29)Aim: It has been predicted that there should be concordance between biogeographical and phylogeographical processes structuring multi-species regional assemblages. We hypothesise that oceanographic barriers in the marine environment affect concomitantly the distribution and the connectivity of the marine biota, thus producing congruent biogeographical and phylogeographical structures. We also ... -
Identification of New Purpuroine Analogues from the Arctic Echinodermata Pteraster militaris That Inhibit FLT3-ITD+ AML Cell Lines
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-13)Isolation of bioactive products from the marine environment is considered a very promising approach to identify new compounds that can be used for further drug development. In this work we have isolated three new compounds from the purpuroine family by mass-guided preparative HPLC; purpuroine K-M. These compounds where screened for antibacterial- and antifungal activity, antibiofilm formation and ... -
Heterochronic maturation of anatomical plugs for protecting the airway in rorqual whales (Balaenopteridae)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-14)Recently, a unique mechanism for protecting the airway during lunge feeding was discovered in rorqual whales (Balaenopteridae). This mechanism is based on an oral plug structure in the soft palate with similarities in musculo-fatty composition to the nasal plugs protecting the respiratory tract of rorquals from water entry and barotrauma during diving. As a follow-up, we present here a ...
