Age at First Maturity and the Early Expression of Oocyte Recruitment Processes in Two Forms of Atlantic Salmon (Salmo salar)and Their Hybrids

1984 ◽  
Vol 41 (8) ◽  
pp. 1139-1149 ◽  
Author(s):  
A. M. Sutterlin ◽  
D. MacLean
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Fork Length ◽  
Atlantic Salmon Salmo Salar ◽  
In Captivity ◽  
Early Expression ◽  
Pure Lines ◽  
First Maturity ◽  
Anadromous Form

The two pure lines and the reciprocal hybrids between an early maturing dwarf form of landlocked Atlantic salmon (Salmo salar) and a later maturing anadromous form were reared in captivity for a minimum period of 2.5 yr. Despite similar growth rates, 90% of female parr of the dwarf landlocked strain matured at age 2+ yr (fork length 15 cm), while no females of the anadromous form matured at this time. The weight of the ovary differed in the two pure forms at age 0+ and the numbers, size, and stages of previtellogenic oocytes also differed at age1+. Ovarian patterns of development and the time of onset of sexual maturation in the hybrid forms appeared intermediate to that of the parental forms. The implications of genetically controlled factors influencing rates of sexual maturation, growth, smoltification, and subsequent fecundity are discussed.

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 Atlantic salmon (Salmo salar) smolt and early post-smolt migration and survival inferred from multi-year and multi-stock acoustic telemetry studies in the Gulf of St. Lawrence, northwest Atlantic

2018 ◽  
Vol 76 (4) ◽  
pp. 1107-1121 ◽  
Author(s):  
Gérald Chaput ◽  
Jonathan Carr ◽  
Jason Daniels ◽  
Steve Tinker ◽  
Ian Jonsen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Survival Rates ◽  
Fork Length ◽  
Probability Of Survival ◽  
Size Dependent ◽  
Atlantic Salmon Salmo Salar ◽  
Key Points ◽  
Migration Dynamics

Abstract The migration dynamics and inter-annual variation in early at-sea survival of Atlantic salmon (Salmo salar) smolts over 14 years of study are reported for four river populations located in the Gulf of St. Lawrence (Canada). Acoustically tagged smolts were monitored at three points along their migration from freshwater to the Labrador Sea, a migration extending more than 800 km at sea and a period of 2 months. A hierarchical state-space version of the Cormack–Jolly–Seber model was used to estimate apparent survival rates from incomplete acoustic detections at key points. There was a positive size-dependent probability of survival through the freshwater and estuary areas; the odds of survival of a 16 cm smolt were 1.5–1.7 times higher than for a 13.5 cm smolt, length at tagging. Length adjusted (centred to the mean fork length of smolts during the study of 14.6 cm) survivals through the estuary and nearshore waters were estimated to range between 67 and 90% for the two river populations migrating through Chaleur Bay in contrast to lower survival estimates of 28–82% for the two populations from the neighbouring Miramichi Bay. Across the 14 years of study, survival estimates varied without trend for the populations of Chaleur Bay, but declined for the populations migrating through Miramichi Bay. Survival through the Gulf of St. Lawrence was variable but generally high among years and rivers, ranging from 96% day−1 to 99% day−1. Long term, replicated studies at multiple sites using acoustically tagged smolts can provide empirical data to examine hypotheses of the location and timing of factors contributing to smolt and post-smolt mortality of salmon at sea.

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

Inverse Correlation between Ovarian Development of Atlantic Salmon (Salmo salar) Smolts and Sea Age

1987 ◽  
Vol 44 (7) ◽  
pp. 1320-1325 ◽  
Author(s):  
E. Michael P. Chadwick ◽  
Ross R. Claytor ◽  
Claude E. Léger ◽  
Richard L. Saunders
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Significant Positive Correlation ◽  
Ovarian Development ◽  
Fork Length ◽  
Inverse Correlation ◽  
Positive Correlation ◽  
Atlantic Salmon Salmo Salar ◽  
Smolt Age

In order to understand the factors which determine sea age of Atlantic salmon (Salmo salar), ovarian development of smolts was examined in 14 groups which varied in parental sea age, smolt age, and size. Parental sea age of smolts explained most of the variation in ovarian development. Smolts from one-sea-winter parents had a higher percentage of the more advanced oocyte stages in their ovaries, while smolts from two-sea-winter parents had a low percentage, and those from three-sea-winter parents had none. Annual within-stock variation and covariance with freshwater age were not significant. Hatchery-reared smolts had similar ovarian development to their wild counterparts. There was also a significant, positive correlation between fork length of smolts and ovarian development within groups.

Differences in Atlantic Salmon, Salmo salar, from North America and Europe

1972 ◽  
Vol 29 (2) ◽  
pp. 179-185 ◽  
Author(s):  
O. L. Nyman ◽  
J. H. C. Pippy
Keyword(s):  
North America ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
North American ◽  
Serum Proteins ◽  
Fork Length ◽  
Anisakis Simplex ◽  
Atlantic Salmon Salmo Salar

Differences in electropherograms produced by serum proteins and liver esterases were used to identify North American and European Atlantic salmon (Salmo salar) caught at sea. Division of salmon according to continent of origin was supported by mean river age, mean fork length, and abundance of the two parasites Anisakis simplex and Eubothrium crassum. Consistent differences in electrophoretic behaviour of serum proteins and liver esterases in salmon from the two continents support the suggestion that salmon from North America and Europe represent different subspecies.

Behaviour and Microhabitat of Young Atlantic Salmon (Salmo salar) during Winter

1988 ◽  
Vol 45 (12) ◽  
pp. 2156-2160 ◽  
Author(s):  
Richard A. Cunjak
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Activity Pattern ◽  
Fork Length ◽  
Nocturnal Activity ◽  
Atlantic Salmon Salmo Salar ◽  
Sediment Compaction ◽  
Mean Diameter ◽  
Nova Scotian ◽  
Water Depths

Underwater observations at two sites along a small Nova Scotian river were carried out between December and April (water temperature range = 0.5–7.0 °C) to describe the winter microhabitat of young Atlantic salmon (Salmo salar). Salmon (5–15 cm fork length) were consistently found hiding beneath rocks (mean diameter = 16.8–23.0 cm) in riffle-run habitats where mean water depths were 40.9–48.9 cm and mean water velocities were 38.7–45.7 cm∙s−1. Many of the salmon were found overwintering within redd excavations. "Home stones" were distributed closer to midstream than to river banks and where sediment compaction was minimal. Monthly collections of fish (ages 1 and 2) indicated that feeding continued over winter. The data suggest a nocturnal activity pattern and photonegative response by young salmon during winter.

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