The cytochrome P450 system of atlantic salmon (Salmo salar): I. Basal properties and induction of P450 1A1 in liver of immature and mature fish

1991 ◽  
Vol 9 (4) ◽  
pp. 339-349 ◽  
Author(s):  
Anders Goksøyr ◽  
Håvard E. Larsen
Keyword(s):  
Cytochrome P450 ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Cytochrome P450 System ◽  
Atlantic Salmon Salmo Salar ◽  
Mature Fish

Variation in Age at First Spawning in Atlantic Salmon (Salmo salar)

1978 ◽  
Vol 35 (1) ◽  
pp. 145-147 ◽  
Author(s):  
Gunnar Nævdal ◽  
Marianne Holm ◽  
Oscar Ingebrigtsen ◽  
Dag Møller
Keyword(s):  
Atlantic Salmon ◽  
Key Words ◽  
Salmo Salar ◽  
Life Histories ◽  
Salmon River ◽  
Atlantic Salmon Salmo Salar ◽  
Mature Fish ◽  
Maturation Age

Significant differences in the proportion of mature fish in groups of Atlantic salmon (Salmo salar) of different river origins maintained under the same conditions were observed during the 1st and 2nd yr of sea rearing. Nearly all fish in sib groups originating from grilse rivers matured during the 2nd sea year, while few or no mature fish were found in the groups originating from rivers producing mainly multi-sea-winter salmon. The observations were in accordance with the life histories of the different river populations, indicating that salmon inherit rather than acquire a tendency to mature at a certain age. Key words: Atlantic salmon, maturation age, cultured salmon, river populations

Effects of Dietary Iron Concentrations on the Cytochrome P450 System of Atlantic Salmon (Salmo salar)

1994 ◽  
Vol 51 (2) ◽  
pp. 315-320 ◽  
Author(s):  
Anders Goksøyr ◽  
Marit Bjørnevik ◽  
Amund Maage
Keyword(s):  
Cytochrome P450 ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Dietary Iron ◽  
Iron Group ◽  
Cytochrome P450 1A1 ◽  
Potent Inducer ◽  
Monooxygenase Activity ◽  
High Iron ◽  
Atlantic Salmon Salmo Salar

Groups of Atlantic salmon (Salmo salar) parr were fed a basal diet containing 27 mg Fe∙kg feed−1 supplemented with different iron levels (0, 80, and 160 mg∙kg−1, respectively) for 8 wk. After this period, a subgroup of each iron regime was treated intraperitoneally with β-naphthoflavone (BNF), a potent inducer of cytochrome P450 1A1 in fish. Differences between the iron regimes were observed in hepatic iron content, which was higher in the high-iron group, and in P450 1A1 levels and monooxygenase activity, measured as 7-ethoxyresorufin O-deethylase (EROD), which were lower in the high-iron group. Differences were also observed in the induction response of P450 1A1 and EROD to BNF. Levels of a constitutive isozyme denoted P450con, belonging to the P450 3A subfamily, did not respond to the dietary iron in the same manner, demonstrating selective regulatory effects of iron on different P450 isozymes.

Microstructure and texture of fresh and smoked Atlantic salmon, Salmo salar L., fillets from fish reared and slaughtered under different conditions

2001 ◽  
Vol 32 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Sjofn Sigurgisladottir ◽  
Margret S. Sigurdardottir ◽  
Helga Ingvarsdottir ◽  
Ole J. Torrissen ◽  
Hannes Hafsteinsson
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar

Persistence of Orally Administered Salmonella enterica Serovars Agona and Montevideo in Atlantic Salmon (Salmo salar L.)

2005 ◽  
Vol 68 (7) ◽  
pp. 1336-1339 ◽  
Author(s):  
L. L. NESSE ◽  
T. LØVOLD ◽  
B. BERGSJØ ◽  
K. NORDBY ◽  
C. WALLACE ◽  
...  
Keyword(s):  
Gastrointestinal Tract ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Salmonella Enterica ◽  
Most Probable Number ◽  
Fish Feed ◽  
Internal Organs ◽  
Probable Number ◽  
Atlantic Salmon Salmo Salar ◽  
Gastric Intubation

The objective of our experiments was to study the persistence and dissemination of orally administered Salmonella in smoltified Atlantic salmon. In experiment 1, salmon kept at 15°C were fed for 1 week with feed contaminated with 96 most-probable-number units of Salmonella Agona per 100 g of feed and then starved for 2 weeks. Samples were taken from the gastrointestinal tract and examined for Salmonella 1, 2, 8, 9, 15, and 16 days after the feeding ended. In experiment 2, Salmonella Agona and Montevideo were separately mixed with feed and administered by gastric intubation. Each fish received 1.0 × 108, 1.0 × 106, or 1.0 × 104 CFU. The different groups were kept in parallel at 5 and 15°C and observed for 4 weeks. Every week, three fish in each group were sacrificed, and samples were taken from the skin, the pooled internal organs, the muscle, and the gastrointestinal tract and examined for the presence of Salmonella. The results from the two experiments showed that the persistence of Salmonella in the fish was highly dependent on the dose administered. Salmonella was not recovered from any of the fish that were fed for 1 week with the lowest concentration of Salmonella. In the fish given the highest dose of Salmonella, bacteria persisted for at least 4 weeks in the gastrointestinal tract as well as, to some extent, the internal organs. The present study shows that under practical conditions in Norway, the risk of Salmonella in fish feed being passed on to the consumer of the fish is negligible.

Quantifying the relative importance of stock level, river temperature and discharge on the abundance of juvenile Atlantic salmon ( Salmo salar )

Ecohydrology ◽  
2020 ◽  
Vol 13 (6) ◽  
Author(s):  
Ross S. Glover ◽  
Chris Soulsby ◽  
Robert J. Fryer ◽  
Christian Birkel ◽  
Iain A. Malcolm
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Relative Importance ◽  
Stock Level ◽  
River Temperature ◽  
Atlantic Salmon Salmo Salar ◽  
Juvenile Atlantic Salmon
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