Carotenoid and lipid content in muscle of Atlantic salmon, Salmo salar, transferred to seawater as 0+ or 1+ smolts

2004 ◽  
Vol 138 (1) ◽  
pp. 29-40 ◽  
Author(s):  
T. Ytrestøyl ◽  
G. Coral-Hinostroza ◽  
B. Hatlen ◽  
D.H.F. Robb ◽  
B. Bjerkeng
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Lipid Content ◽  
Atlantic Salmon Salmo Salar

Some physiologic distinctions between freshwater and diadromous forms of the Atlantic salmon, Salmo salar L.

1983 ◽  
Vol 61 (5) ◽  
pp. 1165-1170 ◽  
Author(s):  
S. E. Barbour ◽  
E. T. Garside
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Salinity Tolerance ◽  
Lipid Content ◽  
Temperature Cycle ◽  
Temperature Cycles ◽  
Atlantic Salmon Salmo Salar ◽  
Freshwater Salmon

Parr of the diadromous and freshwater forms of the Atlantic salmon, Salmo salar L., were cultured through the smolt stage in photoperiod and temperature cycles that were delayed 3 months relative to those in nature. Such environmental manipulations caused a delay of approximately 3 months in smoltification of diadromous parr, as measured by changes in water and lipid content and salinity tolerance. These changes did not occur in parr of freshwater salmon exposed to the same modified photoperiod and temperature cycle. The implications of this are discussed.

Muscle lipid content determines the eating quality of smoked and cooked Atlantic salmon (Salmo salar)

Aquaculture ◽  
2002 ◽  
Vol 205 (3-4) ◽  
pp. 345-358 ◽  
Author(s):  
D.H.F Robb ◽  
S.C Kestin ◽  
P.D Warriss ◽  
G.R Nute
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Lipid Content ◽  
Eating Quality ◽  
Muscle Lipid ◽  
Atlantic Salmon Salmo Salar

Large variation in lipid content, ΣPCB and δ13C within individual Atlantic salmon (Salmo salar)

2007 ◽  
Vol 145 (1) ◽  
pp. 131-137 ◽  
Author(s):  
Maria E. Persson ◽  
Per Larsson ◽  
Niklas Holmqvist ◽  
Patrik Stenroth
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Lipid Content ◽  
Atlantic Salmon Salmo Salar

Seawater Adaptation and Parr–Smolt Transformation of Juvenile Atlantic Salmon, Salmo salar

1978 ◽  
Vol 35 (1) ◽  
pp. 93-100 ◽  
Author(s):  
G. J. Farmer ◽  
J. A. Ritter ◽  
D. Ashfield
Keyword(s):  
Moisture Content ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Lipid Content ◽  
Condition Factor ◽  
Fork Length ◽  
Temperature Cycle ◽  
Seawater Adaptation ◽  
Migratory Activity ◽  
Atlantic Salmon Salmo Salar

Seawater adaptation of 1- and 2-yr-old Atlantic salmon, Salmo salar, presmolts and smolts was assessed during exposure to salinity increasing from 0.1 to 31‰ by examining changes in the osmotic concentration of their serum, urine, and intestinal fluid. Both age-classes adapted to seawater equally well; the marine osmoregulatory mechanisms apparently function before completion of parr–smolt transformation. Adaptation was possible during the parr stage for fish exceeding 12–13 cm fork length. The timing of transformation was synchronous for 1- and 2-yr-old juveniles as demonstrated by changes in their lipid and moisture content and condition factor (K). Condition factor of juveniles at the Mactaquac Hatchery, New Brunswick (45°58′N), decreased from February until the second half of May, while lipid content decreased from February until the second half of June. Migratory activity of juveniles at this location was maximal during the second half of May coincident with attainment of minimum K values and decreased during the first half of June as K values increased. While timing of changes in lipid and moisture content and K values were similar for juveniles at the Mersey Hatchery, Nova Scotia (44°10′N), lipid content of fish at the more southerly station decreased at a greater rate and migratory activity was apparent earlier. This was probably attributable to the advanced temperature cycle at that location. Smolt-release dates are discussed in terms of the development of the marine osmoregulatory mechanisms and the timing of parr–smolt transformation. Key words: Atlantic salmon, seawater adaptation, parr–smolt transformation, migration, hatchery management

Food restriction prior to release reduces precocious maturity and improves migration tendency of Atlantic salmon (Salmo salar) smolts

2012 ◽  
Vol 69 (12) ◽  
pp. 1981-1993 ◽  
Author(s):  
Anssi Vainikka ◽  
Riina Huusko ◽  
Pekka Hyvärinen ◽  
Pekka K. Korhonen ◽  
Tapio Laaksonen ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Lipid Content ◽  
Food Restriction ◽  
Migration Speed ◽  
Controlled Experiments ◽  
Atlantic Salmon Salmo Salar ◽  
Precocious Maturity ◽  
Swimming Endurance ◽  
Feeding Migration

Since food availability is known to affect both the precocious maturation and start of feeding migration in wild juvenile salmonids, we examined if a reduction in otherwise plentiful feeding in hatcheries could improve migration tendency and the subsequent survival of released Atlantic salmon (Salmo salar) smolts. A reduction in diet lipid content and feed ration (FR) the previous spring and in FR in the winter prior to release proved efficient; spring-diet treatment halved the proportion of mature males in the autumn prior to release, and a reduction in FR in the winter prior to release decreased latency before leaving the stocking site. In addition, a reduction in FR in winter affected the onset of migration, improved migration speed, and defined the direction of migration downstream in controlled experiments. However, diet manipulations neither affected the swimming endurance nor improved the generally poor tag recapture rates. We conclude that reduced FR at specific times could be used to reduce both precocious male maturity and improve the migration tendency of released salmon.

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