Localization of 2-[125l]lodomelatonin Binding Sites in the Brain of the Atlantic Salmon, Salmo salar L

1992 ◽  
Vol 55 (5) ◽  
pp. 529-537 ◽  
Author(s):  
Peter Ekström ◽  
Jirˇí Vaněček
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Binding Sites ◽  
Atlantic Salmon Salmo Salar ◽  
The Brain

Multiple changes in the brain of Atlantic salmon, Salmo salar, during photoperiodically-induced parr-smolt transformation

Aquaculture ◽  
1994 ◽  
Vol 121 (1-3) ◽  
pp. 289-290 ◽  
Author(s):  
Pierre-Philippe Morin ◽  
J.Geoffrey Eales ◽  
Toshiaki J Hara ◽  
Svante Winberg ◽  
Göran E Nilsson
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar ◽  
The Brain

Development, survival, and structural alterations of embryos and alevins of Atlantic salmon, Salmo salar L., continuously exposed to alkaline levels of pH, from fertilization

1980 ◽  
Vol 58 (3) ◽  
pp. 369-377 ◽  
Author(s):  
P. G. Daye ◽  
E. T. Garside
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Hydrogen Ions ◽  
Gradual Decline ◽  
Cumulative Mortality ◽  
Zona Radiata ◽  
Atlantic Salmon Salmo Salar ◽  
Branchial Epithelium ◽  
The Brain ◽  
Degree Of Severity

Embryos of the Atlantic salmon, Salmo salar L., were incubated continuously from fertilization at pH 6.8 (control) and pH 9.0 and 9.5, initially at 6.7 °C but with a gradual decline in the first 5 weeks to 5.0 °C for the remaining 10 weeks of exposure. Subsequently, the alevins were maintained in these environments for 50 days after hatching. Developmental processes and hatching were not affected by these levels of pH. Percentage cumulative mortality of treated embryos, 8%, was approximately that in the controls. Alevin mortality in the control lots was 1.2 and 1.3%. At pH 9.0, cumulative mortality was 0.4%, but at pH 9.5 there was an accelerating increase to 18%, at the termination of observation.Sublethal changes in embryos were confined mostly to cell necrosis and sloughed rudimentary epidermis. Some metaplasia of the brain stem occurred at pH 9.5. Sites and intensity of alterations increased in alevins at pH 9.5, following the loss of the zona radiata. In addition to ongoing injury of epidermis, including mucous cells, deleterious alterations occurred in branchial epithelium, erythrocytes, myocardium, blood vessels of the viscera, liver, brain, and optic lenses. In general, sublethal changes caused by hydroxylions are similar to those caused by excessive hydrogen ions but are somewhat less extensive in the structures affected or in their degree of severity.

Early enrichment effects on brain development in hatchery-reared Atlantic salmon (Salmo salar): no evidence for a critical period

2012 ◽  
Vol 69 (9) ◽  
pp. 1481-1490 ◽  
Author(s):  
Joacim Näslund ◽  
Kim Aarestrup ◽  
Søren T. Thomassen ◽  
Jörgen I. Johnsson
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Brain Size ◽  
Early Period ◽  
Structural Complexity ◽  
Brain Growth ◽  
Atlantic Salmon Salmo Salar ◽  
Rearing Methods ◽  
External Feeding ◽  
The Brain

In hatcheries, fish are normally reared in barren environments, which have been reported to affect their phenotypic development compared with wild conspecifics. In this study, Atlantic salmon ( Salmo salar ) alevins were reared in conventional barren hatchery trays or in either of two types of structurally enriched trays. We show that increased structural complexity during early rearing increased brain size in all investigated brain substructures. However, these effects disappeared over time after transfer to barren tanks for external feeding. Parallel to the hatchery study, a group of salmon parr was released into nature and recaptured at smoltification. These stream-reared smolts developed smaller brains than the hatchery reared smolts, irrespective of initial enrichment treatment. These novel findings do not support the hypothesis that there is a critical early period determining the brain growth trajectory. In contrast, our results indicate that brain growth is plastic in relation to environment. In addition, we show allometric growth in brain substructures over juvenile development, which suggests that comparisons between groups of different body size should be made with caution. These results can aid the development of ecologically sound rearing methods for conservational fish-stocking programs.

scholarly journals The mating brain: early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar)

2014 ◽  
Vol 28 (6) ◽  
pp. 1043-1055 ◽  
Author(s):  
Alexander Kotrschal ◽  
Susanne Trombley ◽  
Björn Rogell ◽  
Ioana Brannström ◽  
Eric Foconi ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Body Growth ◽  
Atlantic Salmon Salmo Salar ◽  
Early Maturing ◽  
The Brain
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