Demographic Consequences of Precocious Maturation of Atlantic Salmon (Salmo salar)

1984 ◽  
Vol 41 (9) ◽  
pp. 1349-1353 ◽  
Author(s):  
R. A. Myers
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Adult Male ◽  
Sexual Maturation ◽  
Survival Probability ◽  
Economic Loss ◽  
Annual Survival ◽  
Atlantic Salmon Salmo Salar ◽  
Second Year ◽  
Salmon Production

Detailed records of outgoing smolts of Atlantic salmon (Salmo salar) and estimates of the parr population that produced them were used to study the demographic conequences of male precocious sexual maturation in southwest Newfoundland. Approximately 80% of males matured precociously in the stream. Annual survival probability of a male that reproduces precociously is reduced by a median 44%. Precocious maturation delays smolting; the probability of smolting in the second year for a male precocious parr is approximately 13% of that of a female. The economic loss due to precocious maturation is large; 60% of the adult male salmon production is lost due to precocious maturation.

scholarly journals Detection of Quantitative Trait Loci (QTL) Related to Grilsing and Late Sexual Maturation in Atlantic Salmon (Salmo salar)

2013 ◽  
Vol 16 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Alejandro P. Gutierrez ◽  
Krzysztof P. Lubieniecki ◽  
Steve Fukui ◽  
Ruth E. Withler ◽  
Bruce Swift ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Quantitative Trait ◽  
Atlantic Salmon Salmo Salar ◽  
Trait Loci

scholarly journals Genome-Wide Association Study (GWAS) for Growth Rate and Age at Sexual Maturation in Atlantic Salmon (Salmo salar)

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0119730 ◽  
Author(s):  
Alejandro P. Gutierrez ◽  
José M. Yáñez ◽  
Steve Fukui ◽  
Bruce Swift ◽  
William S. Davidson
Keyword(s):  
Growth Rate ◽  
Atlantic Salmon ◽  
Association Study ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Genome Wide Association Study ◽  
Genome Wide Association ◽  
Atlantic Salmon Salmo Salar ◽  
Genome Wide

Effects of aromatase inhibitors on sexual maturation in Atlantic salmon, Salmo salar, male parr

1995 ◽  
Vol 14 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Efthimia Antonopoulou ◽  
Ian Mayer ◽  
Ingemar Berglund ◽  
Bertil Borg
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Aromatase Inhibitors ◽  
Sexual Maturation ◽  
Atlantic Salmon Salmo Salar

scholarly journals Sexual maturation and smoltification in domesticated Atlantic salmon (Salmo salar L.) - is there a developmental conflict?

2018 ◽  
Vol 6 (17) ◽  
pp. e13809 ◽  
Author(s):  
Per Gunnar Fjelldal ◽  
Rüdiger Schulz ◽  
Tom O. Nilsen ◽  
Eva Andersson ◽  
Birgitta Norberg ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Atlantic Salmon Salmo Salar

Age at Sexual Maturity in Icelandic Stocks of Atlantic Salmon (Salmo salar)

1983 ◽  
Vol 40 (9) ◽  
pp. 1456-1468 ◽  
Author(s):  
Dennis L. Scarnecchia
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sexual Maturity ◽  
Physical Factors ◽  
Thermal Gradients ◽  
Ocean Temperature ◽  
Growth And Survival ◽  
Atlantic Salmon Salmo Salar ◽  
Life History Pattern ◽  
Second Year

For Icelandic stocks of Atlantic salmon (Salmo salar) in 77 rivers, the combination of June ocean temperature, length of river ascended by the salmon, discharge of the river in July–September, and latitude explained much of the variation in percentages of grilse — 72% for females and 62% for males. For both sexes, percentage of grilse was directly related to ocean temperature but inversely related to length of river, discharge of river, and latitude. For stocks in 23 Southwest Coast rivers, length of river explained 72% of the variation in percentage of females that were grilse. Females in stocks south of the thermal gradients separating Atlantic from Arctic or Polar water tended to return as grilse; females north of the gradients tended to return after more than one winter at sea. The decline in percentages of grilse clockwise from southwestern to northeastern rivers corresponded closely with the decline in June ocean temperatures between these areas. I hypothesize that the salmon stocks have adapted their age at sexual maturity to the length and discharge of the rivers, natural mortality rates during their second year at sea, and average expected ocean temperatures, reflecting conditions for growth and survival, that the smolts encounter. Age at maturity appears not to be a direct causal response to any of these physical factors, and appears best understood only with reference to the entire life history pattern of each stock.

A model for estimating mortality of Atlantic salmon, Salmo salar, between spawning events

2011 ◽  
Vol 68 (9) ◽  
pp. 1635-1650 ◽  
Author(s):  
P. Bradford Hubley ◽  
A. Jamie F. Gibson
Keyword(s):  
Time Series ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Mortality Rates ◽  
Estimation Model ◽  
Mortality Estimation ◽  
Atlantic Salmon Salmo Salar ◽  
The North ◽  
Second Year ◽  
The North Atlantic Oscillation

We developed a Bayesian hierarchical model to estimate annual mortality of repeat-spawning Atlantic salmon, Salmo salar, that distinguishes between mortality rates and the confounding effects of consecutive-year and alternate-year repeat-spawning strategies. The model provides annual estimates of two mortality rates: mortality in the first year (Z1), a time period during which salmon are primarily in freshwater (staging, spawning, and overwintering) followed by a brief period at sea, and mortality in the second year (Z2) when salmon are predominantly at sea. When fit to data for the LaHave River (Nova Scotia, Canada) salmon population, Z1 showed an increasing trend throughout the time series, whereas Z2 also increased but in a single, stepwise manner. Once a time series of mortality rates was separated from the other life-history parameters, we were able to demonstrate how they could be used for examining the influence of environmental conditions by comparing the estimated mortality rate time series with the North Atlantic Oscillation Index (NAOI). This comparison uncovered a statistically significant correlation between the NAOI and the survival in the second year after spawning that would not have been evident had the mortality estimation model not been developed.

Sign in / Sign up

Export Citation Format

Share Document