Reduced Genetic Variability in First-Generation Hatchery Populations of Atlantic Salmon (Salmo salar)

1988 ◽  
Vol 45 (10) ◽  
pp. 1686-1690 ◽  
Author(s):  
Eric Verspoor
Keyword(s):  
Genetic Variation ◽  
Genetic Variability ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
First Generation ◽  
Effective Number ◽  
Structural Protein ◽  
Random Drift ◽  
Eastern Canada ◽  
Atlantic Salmon Salmo Salar

Levels of genetic variation were measured in first-generation Atlantic salmon (Salmo salar) cultured for stock enhancement programs in eastern Canada and compared with variation in wild stocks. One regulatory and 19 structural protein loci were screened of which 10 were polymorphic. Mean heterozygosity and number of alleles per locus were positively correlated with the effective number of adults (N) used to establish the hatchery groups and averaged 26 and 12% lower, respectively, than wild stocks. The observations are consistent with a loss of genetic variability in the hatchery salmon from random drift caused by using small numbers of salmon for broodstock.

Genetic variation in resistance of Atlantic salmon (Salmo salar) to the salmon louse Lepeophtheirus salmonis

Aquaculture ◽  
2005 ◽  
Vol 247 (1-4) ◽  
pp. 145-151 ◽  
Author(s):  
Kari Kolstad ◽  
Peter Andreas Heuch ◽  
Bjarne Gjerde ◽  
Trygve Gjedrem ◽  
Ragnar Salte
Keyword(s):  
Genetic Variation ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Lepeophtheirus Salmonis ◽  
Salmon Louse ◽  
Atlantic Salmon Salmo Salar

Effect of Sea-Age on the Reproductive Potential of Atlantic Salmon (Salmo salar) in Eastern Canada

1989 ◽  
Vol 46 (12) ◽  
pp. 2210-2218 ◽  
Author(s):  
R. G. Randall
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Reproductive Potential ◽  
Female Size ◽  
Eastern Canada ◽  
Age Composition ◽  
Atlantic Salmon Salmo Salar ◽  
Egg Deposition ◽  
Different Populations ◽  
Spawning Run

Reproductive potential of Atlantic salmon (Salmo salar), defined as average eggs per fish in the spawning run, varied three-fold both within stocks over time and among stocks from different geographic areas. Eggs per spawner is a function of fecundity, sea-age, proportion of females, and female size; the latter three traits varied significantly among years for salmon in both the Miramichi and Restigouche Rivers, New Brunswick. Because all of the above traits are related to sea-age at maturity, eggs per spawner was significantly correlated with mean sea-age in both rivers (R2 = 0.88 and 0.61, respectively). Among 10 different populations in eastern Canada, reproductive potential was also correlated with sea-age; for mean sea-ages (MSA) ranging from 1.0 to 1.8 yr, reproductive potential (RP) was defined by the power regression: RP = 1831.26 MSA1.30 (R2 = 0.64 P < 0.05). Thus reproductive potential can be estimated for any population for which the sea-age composition of spawners is known. Assuming a target egg deposition rate of 2.4 × 104 eggs per hectare, required spawners varied inversely with reproductive potential among the 10 populations, from five spawners (MSA = 1.75 yr) to 16 spawners (MSA = 1.15 yr) per hectare.

scholarly journals Inferring marine distribution of Canadian and Irish Atlantic salmon (Salmo salar L.) in the North Atlantic from tissue concentrations of bio-accumulated caesium 137

2007 ◽  
Vol 64 (2) ◽  
pp. 394-404 ◽  
Author(s):  
Aaron D. Spares ◽  
Jeffery M. Reader ◽  
Michael J. W. Stokesbury ◽  
Tom McDermott ◽  
Lubomir Zikovsky ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
North Atlantic ◽  
Tissue Concentration ◽  
Eastern Canada ◽  
Tissue Concentrations ◽  
Atlantic Salmon Salmo Salar ◽  
The North ◽  
The North Atlantic ◽  
High Concentrations

AbstractSpares, A.D., Reader, J.M., Stokesbury, M.J.W., McDermott, T., Zikovsky, L., Avery, T.S., and Dadswell, M.J. 2007. Inferring marine distribution of Canadian and Irish Atlantic salmon (Salmo salar L.) in the North Atlantic from tissue concentrations of bio-accumulated caesium 137. – ICES Journal of Marine Science, 64: 394–404. Atlantic salmon returning from marine migrations to eastern Canada and western Ireland during 2002 and 2003 were analysed for tissue concentrations of bio-accumulated caesium 137 (137Cs). Salmon from Canadian and Irish waters demonstrated concentrations (0.20 ± 0.14 Bq kg−1 and 0.19 ± 0.09 Bq kg−1, mean ± s.d., respectively) suggesting similar oceanic feeding distributions during migration. Canadian aquaculture escapees had a similar mean tissue concentration (0.28 ± 0.22 Bq kg−1), suggesting migration with wild salmon. However, significantly higher concentrations in 1-sea-winter (1SW) escapees (0.43 ± 0.25 Bq kg−1) may alternatively suggest feeding within local estuaries. High concentrations in some Canadian 1SW salmon indicated trans-Atlantic migration. Low concentrations of Canadian multi-sea-winter (MSW) salmon suggested a feeding distribution in the Labrador and Irminger Seas before homeward migration, because those regions have the lowest surface water 137Cs levels. Estimates of wild Canadian and Irish salmon feeding east of the Faroes (∼8°W) were 14.2% and 10.0% (1SW, 24.7% and 11.5%; MSW, 2.9% and 0.0%), respectively. We propose that most anadromous North Atlantic salmon utilize the North Atlantic Gyre for marine migration and should be classified as a single trans-Atlantic straddling stock.

Genetic variation in Norwegian piscine myocarditis virus in Atlantic salmon, Salmo salar L.

2012 ◽  
Vol 36 (2) ◽  
pp. 129-139 ◽  
Author(s):  
J Wiik-Nielsen ◽  
M Alarcón ◽  
B Fineid ◽  
M Rode ◽  
Ø Haugland
Keyword(s):  
Genetic Variation ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar

Electrophoretic Assessment of the Contribution of Transplanted Scottish Atlantic Salmon (Salmo salar) to the Esva River (Northern Spain)

1994 ◽  
Vol 51 (2) ◽  
pp. 248-252 ◽  
Author(s):  
Paloma Morán ◽  
Alberto M. Pendás ◽  
Eva Garcia-Vázquez ◽  
Jorge T. Izquierdo ◽  
Dennis T. Rutherford
Keyword(s):  
Genetic Variation ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Gene Pool ◽  
Mature Male ◽  
Genetic Influence ◽  
Northern Spain ◽  
Atlantic Salmon Salmo Salar ◽  
Precocious Males ◽  
Mature Male Parr

The genetic influence of stocking on the Atlantic salmon (Salmo salar) population from the Spanish Esva River was analysed by electrophoresis of protein loci. Genetic variation within parr and mature male parr samples demonstrated that Scottish-origin parr stocked in 1990 survived the first summer. However, samples collected from returning adults in 1990 and 1991 did not indicate any contribution from previous stocking programs. Altered MEP-2* frequencies indicate that the native gene pool may have been disrupted by foreign genomes from precocious males or grilse.

Genetic variation in non-specific immune parameters in Atlantic salmon (Salmo salar)

Aquaculture ◽  
1993 ◽  
Vol 111 (1-4) ◽  
pp. 294 ◽  
Author(s):  
K.H. Røed ◽  
K.T. Fjalested ◽  
A. Strømsheim
Keyword(s):  
Genetic Variation ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar ◽  
Immune Parameters

Microsatellite genetic variation between and within farmed and wild Atlantic salmon (Salmo salar) populations

Aquaculture ◽  
1999 ◽  
Vol 180 (3-4) ◽  
pp. 247-264 ◽  
Author(s):  
A.T Norris ◽  
D.G Bradley ◽  
E.P Cunningham
Keyword(s):  
Genetic Variation ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar

Estimating the effective number of breeders from single parr samples for conservation monitoring of wild populations of Atlantic salmon Salmo salar

2018 ◽  
Vol 92 (3) ◽  
pp. 699-726 ◽  
Author(s):  
C. F. E. Bacles ◽  
C. Bouchard ◽  
F. Lange ◽  
A. Manicki ◽  
C. Tentelier ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Effective Number ◽  
Wild Populations ◽  
Atlantic Salmon Salmo Salar ◽  
Effective Number Of Breeders

Spawning behaviour and success of mature male Atlantic salmon (Salmo salar) parr of farmed and wild origin

2005 ◽  
Vol 62 (5) ◽  
pp. 1153-1160 ◽  
Author(s):  
Laura K Weir ◽  
Jeffrey A Hutchings ◽  
Ian A Fleming ◽  
Sigurd Einum
Keyword(s):  
Reproductive Success ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
First Generation ◽  
Large Male ◽  
Mature Male ◽  
Atlantic Salmon Salmo Salar ◽  
Spawning Behaviour ◽  
Mature Male Parr ◽  
Variance In Reproductive Success

We examined genetic differences in the reproduction of an alternative maturation phenotype in Atlantic salmon (Salmo salar) by comparing the spawning behaviour and success among farmed, first-generation hybrid, and wild mature male parr raised in similar environments. Parr competed for spawning opportunities in the presence of either wild or farmed large males. There were no consistent differences among groups in aggression; however, there were differences in spawning participation with respect to large male origin and among parr types. There was a strong negative temporal effect on mature male parr spawning participation that differed by parr type; wild and farmed parr were most likely to participate in early spawnings, with hybrids being the most likely to participate in late spawnings. Overall, parr were also less likely to participate in spawnings involving large farmed males. Variance in reproductive success was higher among parr than among large males. Our results are consistent with the hypothesis that there are genetically based behavioural differences among mature male parr of farmed and wild origin that may potentially lead to differences in reproductive success.

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