Passing a seawater challenge test is not indicative of hatchery-reared Atlantic salmon Salmo salar smolts performing as well at sea as their naturally produced conspecifics

2016 ◽  
Vol 88 (6) ◽  
pp. 2219-2235 ◽  
Author(s):  
A. J. Jensen ◽  
M. Berg ◽  
G. Bremset ◽  
B. Finstad ◽  
N. A. Hvidsten ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Challenge Test ◽  
Atlantic Salmon Salmo Salar ◽  
Seawater Challenge

Effects of a temperature shift on seawater challenge test performance in Atlantic salmon (Salmo salar) smolt

Aquaculture ◽  
2001 ◽  
Vol 201 (1-2) ◽  
pp. 153-159 ◽  
Author(s):  
Magne Staurnes ◽  
Trygve Sigholt ◽  
Torbjørn Åsgård ◽  
Grete Baeverfjord
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Test Performance ◽  
Challenge Test ◽  
Temperature Shift ◽  
Atlantic Salmon Salmo Salar ◽  
Seawater Challenge

Growth hormone response to seawater challenge in Atlantic salmon, Salmo salar, during parr-smolt transformation

Aquaculture ◽  
1994 ◽  
Vol 121 (1-3) ◽  
pp. 209-221 ◽  
Author(s):  
M. Schmitz ◽  
I. Berglund ◽  
H. Lundqvist ◽  
B.Th. Björnsson
Keyword(s):  
Growth Hormone ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Growth Hormone Response ◽  
Hormone Response ◽  
Atlantic Salmon Salmo Salar ◽  
Seawater Challenge

Evaluation of statistical models for genetic analysis of challenge-test data on ISA resistance in Atlantic salmon (Salmo salar): Prediction of progeny survival

Aquaculture ◽  
2007 ◽  
Vol 266 (1-4) ◽  
pp. 70-76 ◽  
Author(s):  
Jørgen Ødegård ◽  
Ingrid Olesen ◽  
Bjarne Gjerde ◽  
Gunnar Klemetsdal
Keyword(s):  
Genetic Analysis ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Test Data ◽  
Statistical Models ◽  
Challenge Test ◽  
Atlantic Salmon Salmo Salar

Prospects for a genetic management strategy to control Gyrodactylus salaris infection in wild Atlantic salmon (Salmo salar) stocks

2010 ◽  
Vol 67 (1) ◽  
pp. 121-129 ◽  
Author(s):  
Ragnar Salte ◽  
Hans Bernhard Bentsen ◽  
Thomas Moen ◽  
Smita Tripathy ◽  
Tor Andreas Bakke ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Management Strategy ◽  
Control Measure ◽  
Survival Rates ◽  
Challenge Test ◽  
Genetic Management ◽  
Genetic Trait ◽  
Atlantic Salmon Salmo Salar ◽  
Sib Families

We estimated additive genetic variation and heritability of survival after Gyrodactylus salaris infection from survival records in a pedigreed family material of wild Atlantic salmon ( Salmo salar ) in a controlled challenge test. We used a statistical model that distinguishes between survival time for the fish that died and the ability to survive the entire test as two separate traits. Eleven of the 49 full-sib families suffered 100% mortality, 15 families had between 10% and 25% survival, and the four least affected families had survival rates between 36% and 48%. Estimated heritability of survival on the liability scale was 0.32 ± 0.10. Time until death for fish that died during the test and the ability to survive the entire test were not expressions of the same genetic trait. Simply selecting survivors as parents for the next generation is expected to more than double the overall survival rate in only one generation, given similar exposure to the parasite. Improving the genetic capacity to survive the infection will probably not eradicate the parasite, but when used as a disease control measure, such improvement may contain the infection at a level where the parasite ceases to be a major problem.

Evaluation of statistical models for genetic analysis of challenge test data on furunculosis resistance in Atlantic salmon (Salmo salar): Prediction of field survival

Aquaculture ◽  
2006 ◽  
Vol 259 (1-4) ◽  
pp. 116-123 ◽  
Author(s):  
Jørgen Ødegård ◽  
Ingrid Olesen ◽  
Bjarne Gjerde ◽  
Gunnar Klemetsdal
Keyword(s):  
Genetic Analysis ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Test Data ◽  
Statistical Models ◽  
Challenge Test ◽  
Atlantic Salmon Salmo Salar

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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