Communications: Water Content of Atlantic Salmon Fry at First Feeding in Southern New Brunswick Hatcheries

1992 ◽  
Vol 54 (3) ◽  
pp. 181-183 ◽  
Author(s):  
R. H. Peterson ◽  
A. Sreedharan
Keyword(s):  
Atlantic Salmon ◽  
New Brunswick ◽  
Water Content ◽  
First Feeding ◽  
Salmon Fry

Emergence, population densities, and growth of salmon and trout fry in two New Brunswick streams

1982 ◽  
Vol 60 (10) ◽  
pp. 2239-2244 ◽  
Author(s):  
Robert G. Randall
Keyword(s):  
Atlantic Salmon ◽  
New Brunswick ◽  
Salmo Salar ◽  
Salvelinus Fontinalis ◽  
Early Growth ◽  
Population Densities ◽  
Salmon Fry ◽  
Dependent Growth ◽  
Growth Differences ◽  
Catch Rates

Postemergent downstream dispersal of Atlantic salmon fry (Salmo salar) was monitored using drift samplers during spring 1978 in two Miramichi River, N.B., tributaries. Catch rates of salmon fry peaked during the 2nd and 3rd weeks of June in both streams, coinciding with peak emergence of the salmon from the gravel. Very few trout fry (Salvelinus fontinalis) were captured in the drift nets, but electrofishing results indicated trout emergence preceded salmon by about 3 weeks.The earlier emergence of the trout gave them an early growth advantage over the salmon, so that trout fry were usually larger than salmon fry inhabiting the same stream areas. Early growth rates of both salmon and trout were quite varied among four stream sites during 2 years when growth was monitored; growth differences were discussed in relation to stream temperatures and density-dependent growth. Salmon fry were more abundant than trout fry at most sites in both years.

Seminatural Rearing of Atlantic Salmon (Salmo salar) in Newfoundland

1987 ◽  
Vol 44 (2) ◽  
pp. 337-347 ◽  
Author(s):  
V. A. Pepper ◽  
T. Nicholls ◽  
N. P. Oliver
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Natural Food ◽  
Average Weight ◽  
Artificial Rearing ◽  
Commercial Diet ◽  
First Feeding ◽  
Salmon Fry ◽  
Riverine Habitat ◽  
Daphnia Catawba

Atlantic salmon fry (Salmo salar) obtained from an artificial spawning channel and a deep-substrate incubator, were reared in mesh "troughs" in an artificial rearing channel and in floating lake cages. Fry placed in the lake cages were able to complete their first feeding phase on a diet of natural lake zooplankton but growth performance was improved when artifical diets were used to supplement natural food. Parr fed selectively on Daphnia catawba and mature Epischura lacustris. Parr reared in the mesh troughs were hand-fed a commercial diet. The 90-d average release weight ranged from 1.8 to 3.1 g for parr from the mesh troughs and from 0.9 to 3.1 g for parr from the lake cages. Growth of parr in these experiments resulted in an average weight advantage of approximately 2.3–4.5 times over parr captured from natural riverine habitat at the end of the experiment. Overall swim-up fry to fall-fingerling survival from these experiments was 52% in 1983 and 76% in 1984. Survival and growth varied inversely with density in the mesh trough experiments.

scholarly journals Endogenous production of n-3 long-chain PUFA from first feeding and the influence of dietary linoleic acid and the α-linolenic:linoleic ratio in Atlantic salmon (Salmo salar)

2019 ◽  
Vol 122 (10) ◽  
pp. 1091-1102 ◽  
Author(s):  
Matthew Sprague ◽  
Gong Xu ◽  
Monica B. Betancor ◽  
Rolf E. Olsen ◽  
Ole Torrissen ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Chain Pufa ◽  
First Feeding ◽  
Endogenous Production ◽  
Epa And Dha ◽  
Salmon Fry ◽  
Sunflower Oils ◽  
Long Chain

AbstractAtlantic salmon (Salmo salar) possess enzymes required for the endogenous biosynthesis of n-3 long-chain PUFA (LC-PUFA), EPA and DHA, from α-linolenic acid (ALA). Linoleic acid (LA) competes with ALA for LC-PUFA biosynthesis enzymes leading to the production of n-6 LC-PUFA, including arachidonic acid (ARA). We aimed to quantify the endogenous production of EPA and DHA from ALA in salmon fed from first feeding on diets that contain no EPA and DHA and to determine the influence of dietary LA and ALA:LA ratio on LC-PUFA production. Salmon were fed from first feeding for 22 weeks with three diets formulated with linseed and sunflower oils to provide ALA:LA ratios of approximately 3:1, 1:1 and 1:3. Endogenous production of n-3 LC-PUFA was 5·9, 4·4 and 2·8 mg per g fish and that of n-6 LC-PUFA was 0·2, 0·5 and 1·4 mg per g fish in salmon fed diets with ALA:LA ratios of 3:1, 1:1 and 1:3, respectively. The ratio of n-3:n-6 LC-PUFA production decreased from 27·4 to 2·0, and DHA:EPA ratio increased and EPA:ARA and DHA:ARA ratios decreased, as dietary ALA:LA ratio decreased. In conclusion, with a dietary ALA:LA ratio of 1, salmon fry/parr produced about 28 μg n-3 LC-PUFA per g fish per d, with a DHA:EPA ratio of 3·4. Production of n-3 LC-PUFA exceeded that of n-6 LC-PUFA by almost 9-fold. Reducing the dietary ALA:LA ratio reduced n-3 LC-PUFA production and EPA:ARA and DHA:ARA ratios but increased n-6 LC-PUFA production and DHA:EPA ratio.

Associative learning, short-term memory, and colour preference during first feeding by juvenile Atlantic salmon

1985 ◽  
Vol 63 (1) ◽  
pp. 9-14 ◽  
Author(s):  
L. A. Clarke ◽  
A. M. Sutterlin
Keyword(s):  
Atlantic Salmon ◽  
Associative Learning ◽  
Short Term Memory ◽  
Stomach Contents ◽  
Single Trial ◽  
Colour Preference ◽  
Short Term ◽  
Term Memory ◽  
First Feeding ◽  
Salmon Fry

The innate colour preference of 51 groups of 20 fry was examined at resorption of the visible yolk sac. A mixture of equal portions of blue, red, green, yellow, and unstained cod or capeling eggs were given to fry for 10-min feeding intervals after which fry stomach contents were examined and numbers of each colour of egg consumed were tabulated. Fry showed innate colour preference for red eggs; however, this could be changed to any other colour by only one previous feeding with eggs of the desired colour. This single-trial learning was retained up to 6 h after feeding but began to deteriorate after 21 h. Posisble applications in early rearing of Atlantic salmon fry in hatcheries are discussed.

Hypervitaminosis A in first-feeding fry of the Atlantic salmon (Salmo salar L.)

2002 ◽  
Vol 8 (1) ◽  
pp. 7-13 ◽  
Author(s):  
R. ØRNSRUD ◽  
I. E. GRAFF ◽  
S. HØIE ◽  
G. K. TOTLAND ◽  
G.-I. HEMRE
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Hypervitaminosis A ◽  
Atlantic Salmon Salmo Salar ◽  
First Feeding

scholarly journals The susceptibility of Atlantic salmon fry to freshwater infectious pancreatic necrosis is largely explained by a major QTL

Heredity ◽  
2009 ◽  
Vol 105 (3) ◽  
pp. 318-327 ◽  
Author(s):  
R D Houston ◽  
C S Haley ◽  
A Hamilton ◽  
D R Guy ◽  
J C Mota-Velasco ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Pancreatic Necrosis ◽  
Salmon Fry ◽  
Infectious Pancreatic Necrosis ◽  
Major Qtl

Relationship of upstream migrating adult Atlantic salmon (Salmo salar) and stream discharge within Catamaran Brook, New Brunswick

2007 ◽  
Vol 64 (3) ◽  
pp. 563-573 ◽  
Author(s):  
Sean C Mitchell ◽  
Richard A Cunjak
Keyword(s):  
Body Size ◽  
Atlantic Salmon ◽  
New Brunswick ◽  
Salmo Salar ◽  
Predictive Ability ◽  
River System ◽  
Low Flow ◽  
Stream Discharge ◽  
Atlantic Salmon Salmo Salar ◽  
Adult Abundance

Stream discharge has long been associated with abundance of returning adult spawning salmonids to streams and may also affect body size distribution of adult salmon as low flows interfere with returns of larger-bodied fish. We examined these relationships of abundance and body size within Catamaran Brook, a third-order tributary to the Miramichi River system of New Brunswick, Canada, to investigate the causes of a declining trend in annual returns of Atlantic salmon (Salmo salar) to this stream. Regression models of adult abundance, proportion of the run as grilse, and body size of returning adults as functions of maximum daily stream discharge during the period of upstream spawner migration were constructed. Adult abundance shows a logarithmic relationship with stream discharge and provides good predictive ability, while appearing to not be significantly related to adult abundance in the larger Miramichi system. The proportion as grilse in the run and female body size are also logarithmically related to stream discharge, with low flow years being very influential in the regressions. These relationships of Atlantic salmon population abundance and body size characteristics have implications with respect to stock integrity and production of the following generation.

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