Changes in smolt traits of Atlantic salmon (Salmo salar Linnaeus, 1758) and linkages to parr density and water temperature

2016 ◽  
Vol 32 (5) ◽  
pp. 832-839 ◽  
Author(s):  
E. Jokikokko ◽  
E. Jutila ◽  
I. Kallio-Nyberg
Keyword(s):  
Atlantic Salmon ◽  
Water Temperature ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar

Estimated Escapement of Atlantic Salmon (Salmo salar) for Maximum Smolt Production in Rivers of Different Productivity

1979 ◽  
Vol 36 (2) ◽  
pp. 132-140 ◽  
Author(s):  
Philip E. K. Symons
Keyword(s):  
Atlantic Salmon ◽  
Water Temperature ◽  
Salmo Salar ◽  
Fishery Management ◽  
Survival Rates ◽  
Atlantic Salmon Salmo Salar ◽  
Egg Deposition ◽  
Average Maximum ◽  
Game Fish ◽  
Space Requirements

Smolt production at different egg deposition densities is estimated from data on survival rates and space requirements of juvenile Atlantic salmon (Salmo salar) reported in the literature. Average maximum production of smolts is estimated to be approximately 5/100 m2 for 2+ smolts, 2/100 m2 for 3+ smolts, and 1/100 m2 for 4+ smolts. Minimum egg depositions recommended for production of these numbers of smolts are 220/100 m2, 165–220/100 m2, and 80/100 m2 for each age of smolts, respectively. The escapement of adults required to produce these depositions must be estimated from observed average weights of returning females and a reported fecundity of Atlantic salmon between 1650 and 1760 eggs/kg of female. With the exception of Ungava rivers, average smolt age in any particular river can be estimated from the number of days per year on which water temperature reaches or exceeds 7 °C. Key words: fishery resources, fishery management, production (biological), escapement, survival, game fish, freshwater fish, rivers

Manipulation of Reproductive Function in Atlantic Salmon (Salmo salar) Kelts with Controlled Photoperiod and Temperature

1992 ◽  
Vol 49 (10) ◽  
pp. 2055-2061 ◽  
Author(s):  
C. E. Johnston ◽  
M. J. Hambrook ◽  
R. W. Gray ◽  
K. G. Davidson
Keyword(s):  
Atlantic Salmon ◽  
Water Temperature ◽  
Salmo Salar ◽  
Reproductive Function ◽  
Spring Water ◽  
Egg Development ◽  
Lower Survival ◽  
Atlantic Salmon Salmo Salar ◽  
Photoperiod Regime

Atlantic salmon (Salmo salar) kelts exposed to a regime of two 6-mo seasonally accelerated light increases and decreases (2CP) in 1989 spawned in the spring of 1990 when water temperatures were above 7 °C during the winter months. Kelts exposed to water temperatures below 4 °C during the same period failed to spawn in the spring. Exposure of the nonspawning 2CP kelts to warmer water temperatures in the summer of 1990 stimulated egg development and ovulation by 17 October 1990. Kelts exposed to a simulated natural 12-mo photoperiod regime also spawned at this time. Eggs and sperm from kelts spawned in the spring were viable. Spring-spawned eggs fertilized with fresh sperm had lower survival levels to the eyed-egg stage or to hatch than did eggs from wild fall-spawned stocks. Kelts entrained to spawn in the spring with 2CP photocycles were manipulated to spawn again in the spring of the next year following exposure to a time-shifted photoperiod and elevated winter/spring water temperature.

Phytosterols are not involved in the development of fatty liver in plant oil fed Atlantic salmon (Salmo salar) at high or low water temperature

Aquaculture ◽  
2017 ◽  
Vol 480 ◽  
pp. 123-134 ◽  
Author(s):  
Nini H. Sissener ◽  
Nina S. Liland ◽  
Elisabeth Holen ◽  
Ingunn Stubhaug ◽  
Bente E. Torstensen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Fatty Liver ◽  
Water Temperature ◽  
Salmo Salar ◽  
Plant Oil ◽  
Atlantic Salmon Salmo Salar

scholarly journals Water temperature and dietary histidine affect cataract formation in Atlantic salmon (Salmo salar L.) diploid and triploid yearling smolt

2017 ◽  
Vol 40 (9) ◽  
pp. 1195-1212 ◽  
Author(s):  
F Sambraus ◽  
P G Fjelldal ◽  
S C Remø ◽  
E M Hevrøy ◽  
T O Nilsen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Water Temperature ◽  
Salmo Salar ◽  
Cataract Formation ◽  
Atlantic Salmon Salmo Salar

Water temperature and oxygen: The effect of triploidy on performance and metabolism in farmed Atlantic salmon (Salmo salar L.) post-smolts

Aquaculture ◽  
2017 ◽  
Vol 473 ◽  
pp. 1-12 ◽  
Author(s):  
Florian Sambraus ◽  
Rolf Erik Olsen ◽  
Mette Remen ◽  
Tom Johnny Hansen ◽  
Thomas Torgersen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Water Temperature ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar ◽  
Farmed Atlantic Salmon

Individual variability in activity patterns of juvenile Atlantic salmon (Salmo salar) in Catamaran Brook, New Brunswick

2007 ◽  
Vol 64 (3) ◽  
pp. 486-494 ◽  
Author(s):  
Cindy Breau ◽  
Laura K Weir ◽  
James WA Grant
Keyword(s):  
Atlantic Salmon ◽  
Water Temperature ◽  
Salmo Salar ◽  
Activity Patterns ◽  
Multiple Logistic Regression Analysis ◽  
Fork Length ◽  
Time Of Day ◽  
Individual Variability ◽  
Atlantic Salmon Salmo Salar ◽  
Yoy Fish

The activity of juvenile salmonids in streams varies between seasons, age classes, and times of day, but few studies have quantified the magnitude of individual variation in the behaviour of wild individuals. We monitored the activity patterns of 35 young-of-the-year (YOY) (fork length: 25.6–34.6 mm) and eight 1+ (fork length: 68.2–78.7 mm) Atlantic salmon (Salmo salar) over an 8-week summer field season. Age 1+ salmon were more active at night than during the day, whereas YOY fish were almost exclusively active during the day. However, daytime activity did not peak at 16–20 °C, the optimal water temperature range for growth determined in laboratory studies. Rather, the activity of 1+ fish peaked at 21 °C, whereas the activity of YOY fish continued to increase until 23 °C and then leveled off between 23 and 27 °C. There was also considerable individual variability within an age class in how fish responded to environmental variables that was often obscured by the average patterns. In a multiple logistic regression analysis for the activity of the 35 YOY, 18 responded significantly to time of day, 17 to water temperature, and 16 to day of the year. The causes of this individual variability and the consequences for growth and mortality deserve further study.

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