Long-term effects of photoperiod, temperature and their interaction on growth, gill Na+ , K+ -ATPase activity, seawater tolerance and plasma growth-hormone levels in Atlantic salmon Salmo salar

2013 ◽  
Vol 83 (5) ◽  
pp. 1197-1209 ◽  
Author(s):  
S. O. Handeland ◽  
A. K. Imsland ◽  
B. Th. Björnsson ◽  
S. O. Stefansson
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Atpase Activity ◽  
Salmo Salar ◽  
Long Term Effects ◽  
Plasma Growth Hormone ◽  
Hormone Levels ◽  
Atlantic Salmon Salmo Salar ◽  
Seawater Tolerance

Growth, Parr–Smolt Transformation, and Changes in Growth Hormone of Atlantic Salmon (Salmo salar) Reared under Different Photoperiods

1991 ◽  
Vol 48 (11) ◽  
pp. 2100-2108 ◽  
Author(s):  
Sigurd O. Stefansson ◽  
Björn Th. Bjömsson ◽  
Tom Hansen ◽  
Carl Haux ◽  
G. Lasse Taranger ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Growth Rate ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Continuous Light ◽  
Plasma Growth Hormone ◽  
Hormone Levels ◽  
Light Regimes ◽  
Atlantic Salmon Salmo Salar ◽  
Natural Photoperiod

Potential 1+ smolts of Atlantic salmon (Salmo salar) were reared under three light regimes: simulated natural photoperiod (LDN), continuous light (LD24:0), or a combination of continuous, low-intensity background light and a superimposed simulated natural photoperiod (dual photoperiod, LDD). Growth rate in freshwater was enhanced by LD24:0 and LDD, and changes associated with smoking (increased salinity tolerance, reduced condition coefficient) were advanced under LD24:0. Plasma growth hormone levels were initially high on LD24:0 and LDD whereas on LDN, plasma growth hormone levels increased gradually from February through April. Overall GH levels were negatively correlated with condition coefficient during the final stages of smoking. After 16 mo in seawater, there were no significant size differences among the groups. The incidence of sexual maturation as postsmolts was higher in the LD24:0 and LDD groups whereas the incidence of grilsing was higher in LDN. Results demonstrate the significant influence of photoperiod on growth and smoking in Atlantic salmon. An abrupt increase to continuous light in winter may be sufficient to advance important aspects of the parr–smolt transformation. Dual photoperiod may be a way to combine the increased growth rate observed under continuous light and the normal parr–smolt transformation associated with natural photoperiod.

Photoperiod and temperature affect plasma growth hormone levels, growth, condition factor and hypoosmoregulatory ability of juvenile Atlantic salmon (Salmo salar) during parr-smolt transformation

Aquaculture ◽  
1989 ◽  
Vol 82 (1-4) ◽  
pp. 77-91 ◽  
Author(s):  
Björn Th. Björnsson ◽  
Helgi Thorarensen ◽  
Tetsuya Hirano ◽  
Tsuyoshi Ogasawara ◽  
Júlíus B. Kristinsson
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Growth Condition ◽  
Salmo Salar ◽  
Condition Factor ◽  
Plasma Growth Hormone ◽  
Hormone Levels ◽  
Atlantic Salmon Salmo Salar ◽  
Juvenile Atlantic Salmon

Plasma growth hormone levels increase during seawater exposure of sexually mature Atlantic salmon parr (Salmo salar L.)

1990 ◽  
Vol 80 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Magnus Rydevik ◽  
Bertil Borg ◽  
Carl Haux ◽  
Hiroshi Kawauchi ◽  
Björn Th. Björnsson
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Plasma Growth Hormone ◽  
Hormone Levels ◽  
Salmon Parr ◽  
Sexually Mature ◽  
Atlantic Salmon Parr

Osmoregulation, feed intake, growth and growth hormone levels in 0+ Atlantic salmon (Salmo salar L.) transferred to seawater at different stages of smolt development

Aquaculture ◽  
2003 ◽  
Vol 222 (1-4) ◽  
pp. 167-187 ◽  
Author(s):  
Arne M. Arnesen ◽  
Hilde Toften ◽  
Thorleifur Agustsson ◽  
Sigurd O. Stefansson ◽  
Sigurd O. Handeland ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Feed Intake ◽  
Hormone Levels ◽  
Atlantic Salmon Salmo Salar

Long-term effects of high-energy, low-fishmeal feeds on growth and flesh characteristics of Atlantic salmon (Salmo salar L.)

Aquaculture ◽  
2011 ◽  
Vol 312 (1-4) ◽  
pp. 109-116 ◽  
Author(s):  
Chris André Johnsen ◽  
Ørjan Hagen ◽  
Eldar Åsgard Bendiksen
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
High Energy ◽  
Long Term Effects ◽  
Atlantic Salmon Salmo Salar

Lack of long-term sublethal effects of reduced freshwater pH alone on Atlantic salmon (Salmo salar) smolts subsequently transferred to seawater

2004 ◽  
Vol 61 (4) ◽  
pp. 511-518 ◽  
Author(s):  
Sveinung Fivelstad ◽  
Anne Berit Olsen ◽  
Sigurd Stefansson ◽  
Sigurd Handeland ◽  
Rune Waagbø ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sublethal Effects ◽  
Growth Parameters ◽  
Gill Tissue ◽  
Low Ph ◽  
Control Group ◽  
Long Term Effects ◽  
Atlantic Salmon Salmo Salar

Atlantic salmon (Salmo salar) smolts (mean start weight 42 g) in soft freshwater were exposed to three pH ranges (two replicates in each group) for 35 days: pH 6.5–6.8 (control group), pH 5.9–6.3 (medium-pH group), and pH 5.4–5.9 (low-pH group). All exposures had citrate added to remove labile, toxic Al from the water. On day 35, all groups were transferred to 34‰ seawater and kept there for 100 days. H+ was the main stressor in the exposures because labile Al was <6 µg·L–1 and the gill Al was lower than 27 µg·g dry weight–1 (highest in the medium group). The exposure environments did not cause any significant changes to gill tissue structures, gill Na+,-K+-ATPase activity, mortality, and growth parameters during the freshwater period. However, haematocrit was significantly increased and mean plasma chloride was significantly reduced (p < 0.05) in the low-pH group compared with the control group. This study indicated that the H+ concentrations in the pH range 5.4–5.9 in water containing no to little gill-reactive Al do not impact salmon growth and physiology during smoltification. However, the reduction in blood haematocrit in the low-pH group 3 months after seawater transfer may imply long-term effects of the treatment.

Elevated growth hormone levels in stunted Atlantic salmon, Salmo salar

Aquaculture ◽  
1988 ◽  
Vol 73 (1-4) ◽  
pp. 275-281 ◽  
Author(s):  
Björn Th. Björnsson ◽  
Tsuyoshi Ogasawara ◽  
Tetsuya Hirano ◽  
Jonathan P. Bolton ◽  
Howard A. Bern
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Hormone Levels ◽  
Atlantic Salmon Salmo Salar

Short- and long-term effects of dietary l-tryptophan supplementation on the neuroendocrine stress response in seawater-reared Atlantic salmon (Salmo salar)

Aquaculture ◽  
2013 ◽  
Vol 388-391 ◽  
pp. 8-13 ◽  
Author(s):  
Dean Basic ◽  
Åshild Krogdahl ◽  
Joachim Schjolden ◽  
Svante Winberg ◽  
Marco A. Vindas ◽  
...  
Keyword(s):  
Stress Response ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Long Term Effects ◽  
Atlantic Salmon Salmo Salar ◽  
Short And Long Term

Plasma growth hormone-binding protein levels in Atlantic salmon Salmo salar during smoltification and seawater transfer

2014 ◽  
Vol 85 (4) ◽  
pp. 1279-1296 ◽  
Author(s):  
I. E. Einarsdóttir ◽  
N. Gong ◽  
E. Jönsson ◽  
H. Sundh ◽  
L. Hasselberg-Frank ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Binding Protein ◽  
Hormone Binding ◽  
Plasma Growth Hormone ◽  
Protein Levels ◽  
Atlantic Salmon Salmo Salar ◽  
Growth Hormone Binding Protein ◽  
Hormone Binding Protein
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