Jon Vidar Helvik
Overview
Explore the profile of Jon Vidar Helvik including associated specialties, affiliations and a list of published articles.
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24
Citations
174
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Recent Articles
1.
Yadetie F, Zhang X, Reboa A, Noally G, Eilertsen M, Fleming M, et al.
Front Endocrinol (Lausanne)
. 2025 Feb;
15:1491432.
PMID: 39931438
Introduction: The pituitary and liver are among the main sites of action of estrogens in fish. Years of research has shown that xenoestrogens can interfere with functions of estrogens. There...
2.
Eilertsen M, Norland S, Dolan D, Karlsen R, Gomes A, Bolton C, et al.
PLoS One
. 2024 Nov;
19(11):e0312911.
PMID: 39546447
An organism's biological processes are adapted to and driven by rhythmicity in the natural environment and periodicity of light is one of the most influential factors. In a developing organism,...
3.
Norland S, Gomes A, Ronnestad I, Helvik J, Eilertsen M
Front Behav Neurosci
. 2023 May;
17:1162494.
PMID: 37153936
During the first feeding period, fish will adapt to exogenous feeding as their endogenous source of nutrients is depleted. This requires the development of a functional physiological system to control...
4.
Eilertsen M, Dolan D, Bolton C, Karlsen R, Davies W, Edvardsen R, et al.
PLoS Genet
. 2022 Dec;
18(12):e1010529.
PMID: 36508414
Light cues vary along the axis of periodicity, intensity and spectrum and perception of light is dependent on the photoreceptive capacity encoded within the genome and the opsins expressed. A...
5.
Mapping key neuropeptides involved in the melanocortin system in Atlantic salmon (Salmo salar) brain
Norland S, Eilertsen M, Ronnestad I, Helvik J, Gomes A
J Comp Neurol
. 2022 Oct;
531(1):89-115.
PMID: 36217593
The melanocortin system is a key regulator of appetite and food intake in vertebrates. This system includes the neuropeptides neuropeptide y (NPY), agouti-related peptide (AGRP), cocaine- and amphetamine-regulated transcript (CART),...
6.
Horne C, Helvik J, Fleming M, Fjelldal P, Eilertsen M
Brain Behav Evol
. 2022 Aug;
98(1):32-43.
PMID: 35921812
In Atlantic salmon (Salmo salar), seasonal photoperiod is shown to regulate the onset of sexual maturation, yet which brain region(s) is involved, and how light information impacts the neuroendocrine system...
7.
Eilertsen M, Davies W, Patel D, Barnes J, Karlsen R, Mountford J, et al.
Front Neuroanat
. 2022 Jul;
16:945344.
PMID: 35899127
Salmonids are ideal models as many species follow a distinct developmental program from demersal eggs and a large yolk sac to hatching at an advanced developmental stage. Further, these economically...
8.
Bolton C, Bekaert M, Eilertsen M, Helvik J, Migaud H
Front Physiol
. 2021 Dec;
12:761109.
PMID: 34925060
To better understand the complexity of clock genes in salmonids, a taxon with an additional whole genome duplication, an analysis was performed to identify and classify gene family members (,...
9.
Eilertsen M, Clokie B, Ebbesson L, Tanase C, Migaud H, Helvik J
PLoS One
. 2021 Sep;
16(9):e0258007.
PMID: 34587204
Photoreceptive inputs to the teleost brain are perceived as image of the visual world and as photo-modulation of neuroendocrine and neuronal signals. The retina and pineal organ are major receptive...
10.
Kryvi H, Nordvik K, Fjelldal P, Eilertsen M, Helvik J, Storen E, et al.
Anat Rec (Hoboken)
. 2020 Nov;
304(8):1629-1649.
PMID: 33155751
While it is well known that the notochord of bony fishes changes over developmental time, less is known about how it varies across different body regions. In the development of...