Hatchery-reared landlocked Arctic charr, Salvelinus alpinus (L.), from Lake Takvatn, reared in fresh and sea water I. Biochemical composition of food, and lipid composition of fish reared in fresh water

Aquaculture ◽  
1987 ◽  
Vol 67 (3-4) ◽  
pp. 343-351 ◽  
Author(s):  
Einar Ringø ◽  
Baard Nilsen
Keyword(s):  
Fresh Water ◽  
Lipid Composition ◽  
Biochemical Composition ◽  
Sea Water ◽  
Salvelinus Alpinus ◽  
Arctic Charr

Preliminary Observations on the Ionic Regulation of the Arctic Char Salvelinus Alpinus

1971 ◽  
Vol 55 (1) ◽  
pp. 213-222
Author(s):  
R. A. ROBERTS
Keyword(s):  
Fresh Water ◽  
Sea Water ◽  
Potassium Concentration ◽  
Salvelinus Alpinus ◽  
Sodium Concentration ◽  
Sodium Content ◽  
Arctic Char ◽  
The Arctic ◽  
High Degree ◽  
Total Sodium

1. The degree of euryhalinity in a fresh-water resident population of the arctic char, Salvelinus alpinus, has been determined. 2. Although isolated in fresh water for c. 10000-12000 years these fish still show a high degree of salinity tolerance characteristic of their ancestral stock, but this is variably developed in individuals. 3. In fresh water, blood sodium concentration is regulated at 150 mM/l and chloride at 130 mM/l. These increase to 233 and 218 mm/l respectively in sea water. 4. Fish in sea water show a large increase in muscle sodium, although the potassium concentration is only slightly higher than that maintained in fresh water. The total sodium content of the fish reflects the increase observed in the intracellular and extracellular compartments. 5. The rate of sodium turnover in sea-water-adapted fish is some ten times higher than in fresh-water-adapted fish, although it is significantly lower than that observed in most sea-water-adapted teleosts.

scholarly journals Assessing the growth of Arctic charr (Salvelinus alpinus) (Linnaeus, 1758) in four salinities, under experimental conditions

2020 ◽  
Vol 80 (4) ◽  
pp. 907-913
Author(s):  
A. Mardones ◽  
R. Vega ◽  
F. Encina ◽  
C. Pichara ◽  
K. González ◽  
...  
Keyword(s):  
Atpase Activity ◽  
Salmo Salar ◽  
Brackish Water ◽  
Sea Water ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Fish Growth ◽  
Experimental Conditions ◽  
And Control

Abstract Studies in Salvelinus alpinus, Arctic charr, indicate that it has a low capacity to hyposmorregulatory or adaption to sea in winter periods in Arctic waters. The investigation finds to determinate the rank optimum of salinity to can cultivate this species at Chile. The weight adequate was determined to join on the sea by analysis of gill Na+, K+-ATPase activity, that it was found between the ranks 80-130 g, with 14.5 U/mg. It underwent evaluation of fish growth of 72 g salinities from 0 (control), 18, 25 and 33 g/L (sea water) for 94 days. The results indicate that the largest increases were obtained in brackish water. T18 g/L and T25 g/L achieved growth of 25% and 19% on day 94 and term sampling respectively. It is important to mention that the 8% that survived in seawater introduced percentages growth 16.6% equivalent to brackish water and control. These results suggest that Salvelinus alpinus can grow in seawater, with levels of Na+, K+-ATPase similar to those submitted by Salmo salar with a weight not less than 80 g.

Family × Environment interactions in the growth and survival of Arctic charr (Salvelinus alpinus) grown in brackish and fresh water

2013 ◽  
Vol 45 (12) ◽  
pp. 1953-1963 ◽  
Author(s):  
Marcia Chiasson ◽  
Margaret Quinton ◽  
Claude Pelletier ◽  
Roy Danzmann ◽  
Moira Ferguson
Keyword(s):  
Fresh Water ◽  
Family Environment ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Growth And Survival

Seasonal changes in sea-water tolerance of Arctic charr (Salvelinus alpinus)

1989 ◽  
Vol 159 (4) ◽  
pp. 371-378 ◽  
Author(s):  
Bengt Finstad ◽  
Kjell J. Nilssen ◽  
Arne M. Arnesen
Keyword(s):  
Seasonal Changes ◽  
Sea Water ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Water Tolerance

LUMINESCENCE OF THE BLACK SEA MICROSCOPIC FUNGI CULTURES

2017 ◽  
Author(s):  
Olga Mashukova ◽  
Olga Mashukova ◽  
Yuriy Tokarev ◽  
Yuriy Tokarev ◽  
Nadejda Kopytina ◽  
...  
Keyword(s):  
Fresh Water ◽  
Black Sea ◽  
Ethyl Alcohol ◽  
Light Emission ◽  
Sea Water ◽  
Control Culture ◽  
Chemical Stimulation ◽  
The Black Sea ◽  
The Given ◽  
First Time

We studied for the first time luminescence characteristics of the some micromycetes, isolated from the bottom sediments of the Black sea from the 27 m depth. Luminescence parameters were registered at laboratory complex “Svet” using mechanical and chemical stimulations. Fungi cultures of genera Acremonium, Aspergillus, Penicillium were isolated on ChDA medium which served as control. Culture of Penicillium commune gave no light emission with any kind of stimulation. Culture of Acremonium sp. has shown luminescence in the blue – green field of spectrum. Using chemical stimulation by fresh water we registered signals with luminescence energy (to 3.24 ± 0.11)•108 quantum•cm2 and duration up to 4.42 s, which 3 times exceeded analogous magnitudes in a group, stimulated by sea water (p < 0.05). Under chemical stimulation by ethyl alcohol fungi culture luminescence was not observed. Culture of Aspergillus fumigatus possessed the most expressed properties of luminescence. Stimulation by fresh water culture emission with energy of (3.35 ± 0.11)•108 quantum•cm2 and duration up to 4.96 s. Action of ethyl alcohol to culture also stimulated signals, but intensity of light emission was 3–4 times lower than under mechanical stimulation. For sure the given studies will permit not only to evaluate contribution of marine fungi into general bioluminescence of the sea, but as well to determine places of accumulation of opportunistic species in the sea.

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