scholarly journals Genomic signatures of fine-scale local selection in Atlantic salmon suggest involvement of sexual maturation, energy homeostasis and immune defence-related genes

2018 ◽  
Vol 27 (11) ◽  
pp. 2560-2575 ◽  
Author(s):  
Victoria L. Pritchard ◽  
Hannu Mäkinen ◽  
Juha-Pekka Vähä ◽  
Jaakko Erkinaro ◽  
Panu Orell ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Sexual Maturation ◽  
Energy Homeostasis ◽  
Immune Defence ◽  
Fine Scale ◽  
Genomic Signatures ◽  
Local Selection

scholarly journals Genomic Signatures of Fine-Scale Local Adaptation in Atlantic Salmon Suggest Involvement of Sexual Maturation, Energy Homeostasis, Behaviour, and Immune Defence-Related Genes

2018 ◽  
Author(s):  
Victoria L. Pritchard ◽  
Hannu Mäkinen ◽  
Juha-Pekka Vähä ◽  
Jaakko Erkinaro ◽  
Panu Orell ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Local Adaptation ◽  
Sexual Maturation ◽  
Energy Homeostasis ◽  
Snp Array ◽  
Genomic Region ◽  
Future Research ◽  
Immune Defence ◽  
Fine Scale ◽  
Local Selection

ABSTRACTElucidating the genetic basis of adaptation to the local environment can improve our understanding of how the diversity of life has evolved. In this study we used a dense SNP array to identify candidate loci underlying fine-scale local adaptation within a large Atlantic salmon (Salmo salar) population. By combining outlier, gene-environment association, and haplotype homozygosity analyses, we identified multiple regions of the genome with strong evidence for diversifying selection. Several of these candidate regions had previously been identified in other studies, demonstrating that the same loci be adaptively important in Atlantic salmon at sub-drainage, regional and continental scales. Notably, we identified signals consistent with local selection around genes associated with variation in sexual maturation, energy homeostasis, behaviour, and immune defence. These included the large-effect age-at-matunty gene vgll3, the known obesity gene mc4r, and major histocompatibility complex II. Most strikingly, we confirmed a genomic region on Ssa09 that was extremely differentiated among subpopulations, and that is also a candidate for local selection over the global range of Atlantic salmon. This region co-localized with a genomic region strongly associated with spawning ecotype in sockeye salmon (Oncorhynchus nerka), with circumstantial evidence that the same gene (six6) may be the selective target in both cases. The phenotypic effect of this region in Atlantic salmon remains cryptic, although allelic variation is related to river flow volume and co-vanes with timing of the return spawning migration. Our results further inform management of Atlantic salmon and open multiple avenues for future research.

Effects of rearing density on sexual maturation and growth in sea-cage reared Atlantic salmon, Salmo salar L.

1992 ◽  
Vol 23 (3) ◽  
pp. 353-365
Author(s):  
H. A. McLAY ◽  
A. F. YOUNGSON ◽  
R. S. WRIGHT ◽  
R. JOHNSTONE
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Atlantic Salmon Salmo Salar ◽  
Rearing Density ◽  
Sea Cage

scholarly journals Evaluation of antibody response to an adjuvanted hapten-protein vaccine as a potential inhibitor of sexual maturation for farmed Atlantic salmon

2017 ◽  
Vol 71 ◽  
pp. 255-263 ◽  
Author(s):  
Darcy S.O. Mora ◽  
Mo D. Salman ◽  
Christopher A. Myrick ◽  
Jack C. Rhyan ◽  
Lowell A. Miller ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Antibody Response ◽  
Sexual Maturation ◽  
Protein Vaccine ◽  
Potential Inhibitor ◽  
Farmed Atlantic Salmon

scholarly journals Sexual maturation in Atlantic salmon male parr may be triggered both in early spring and late summer under standard farming conditions

2021 ◽  
Author(s):  
Elia Ciani ◽  
Kristine von Krogh ◽  
Rasoul Nourizadeh-Lillabadi ◽  
Ian Mayer ◽  
Romain Fontaine ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Sexual Maturation ◽  
Late Summer ◽  
Early Spring ◽  
Plasma Testosterone ◽  
Farmed Salmon ◽  
Early Maturing ◽  
Advanced Stages ◽  
One Year ◽  
Immature Fish

AbstractMale Atlantic salmon (Salmo salar) display different sexual strategies, maturing either as parr during the freshwater phase (as sneaky spawners), or as post smolts following one or several years at sea. First sexual maturation (puberty) occurs at different times depending on environmental and genetic factors. To improve our knowledge on the timing (age and season) of first sexual maturation in Atlantic salmon male parr, we investigated pubertal activation in second generation farmed salmon from the Norwegian river Figgjo, reared under natural conditions of photoperiod and water temperature. Histological analysis, in combination with morphometric measurements, plasma androgen levels and pituitary gonadotropin gene expression analysis revealed that, as previously reported, some male parr initiated early sexual maturation in spring at one year of age. Interestingly, some male parr were observed to initiate sexual maturation already in autumn, six months after hatching (under-yearlings), much earlier than reported in previous studies. One-year old maturing males showed a low induction in gonadotropin levels, while under-yearling maturing males displayed a significant increase in fshb transcripts as compared to immature fish. Plasma testosterone, detectable also in immature males, increased constantly during testes development, while 11-ketotestosterone, undetectable in immature and early maturing males, increased during more advanced stages of maturation. A mild feminization of the testes (ovotestes) was detected in a subset of samples. This study brings new knowledge on the little investigated field of sexually maturing under-yearlings in Atlantic salmon. This is also the first study comparing the physiology of under-yearling vs one-year old maturing male parr, thus bringing new insights to the remarkable plasticity of Atlantic salmon puberty.

Pituitary and plasma growth hormone dynamics during sexual maturation of female Atlantic salmon

2010 ◽  
Vol 167 (1) ◽  
pp. 77-85 ◽  
Author(s):  
Susana Benedet ◽  
Eva Andersson ◽  
Christian Mittelholzer ◽  
Geir Lasse Taranger ◽  
Björn Thrandur Björnsson
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Sexual Maturation ◽  
Plasma Growth Hormone

scholarly journals Detection of Quantitative Trait Loci (QTL) Related to Grilsing and Late Sexual Maturation in Atlantic Salmon (Salmo salar)

2013 ◽  
Vol 16 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Alejandro P. Gutierrez ◽  
Krzysztof P. Lubieniecki ◽  
Steve Fukui ◽  
Ruth E. Withler ◽  
Bruce Swift ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Quantitative Trait ◽  
Atlantic Salmon Salmo Salar ◽  
Trait Loci

Environmentally associated chromosomal structural variation influences fine‐scale population structure of atlantic salmon ( Salmo salar )

2021 ◽  
Author(s):  
K. Beth Watson ◽  
Sarah J. Lehnert ◽  
Paul Bentzen ◽  
Tony Kess ◽  
Antony Einfeldt ◽  
...  
Keyword(s):  
Population Structure ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Structural Variation ◽  
Fine Scale ◽  
Atlantic Salmon Salmo Salar ◽  
Scale Population

scholarly journals Genome-Wide Association Study (GWAS) for Growth Rate and Age at Sexual Maturation in Atlantic Salmon (Salmo salar)

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0119730 ◽  
Author(s):  
Alejandro P. Gutierrez ◽  
José M. Yáñez ◽  
Steve Fukui ◽  
Bruce Swift ◽  
William S. Davidson
Keyword(s):  
Growth Rate ◽  
Atlantic Salmon ◽  
Association Study ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Genome Wide Association Study ◽  
Genome Wide Association ◽  
Atlantic Salmon Salmo Salar ◽  
Genome Wide

scholarly journals The effects of oxygen depletion due to upwelling groundwater on the posthatch fitness of Atlantic salmon (Salmo salar)

2016 ◽  
Vol 73 (12) ◽  
pp. 1830-1840 ◽  
Author(s):  
Jack Bloomer ◽  
David Sear ◽  
Peter Dutey-Magni ◽  
Paul Kemp
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Oxygen Depletion ◽  
Hyporheic Exchange ◽  
Fine Scale ◽  
Review Of The Literature ◽  
Low Oxygen ◽  
Atlantic Salmon Salmo Salar ◽  
Effect Of Oxygen ◽  
Scale Control

The conditions experienced by incubating Atlantic salmon (Salmo salar) eggs are strongly influenced by hyporheic exchange. In some rivers, periods of intense groundwater upwelling can reduce oxygen levels in the incubation zone to 0% saturation. The present study investigated the effect of oxygen sags on the posthatch fitness of Atlantic salmon. A laboratory experiment allowed fine-scale control of oxygen concentrations to replicate those induced by low oxygen groundwater in rivers. Extreme oxygen sags in the earlier stages of embryo development resulted in a developmental lag with alevin hatching later and at an underdeveloped state. At the latest stages of development, oxygen sags caused premature hatching of severely underdeveloped alevin. These findings combined with a review of the literature suggest posthatch survival of embryos exposed to groundwater-induced hypoxia will be lower because of predation and poor competitiveness.

Effects of aromatase inhibitors on sexual maturation in Atlantic salmon, Salmo salar, male parr

1995 ◽  
Vol 14 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Efthimia Antonopoulou ◽  
Ian Mayer ◽  
Ingemar Berglund ◽  
Bertil Borg
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Aromatase Inhibitors ◽  
Sexual Maturation ◽  
Atlantic Salmon Salmo Salar
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