Relationships between Social Status, Otolith Size at first feeding and subsequent growth in Atlantic Salmon (Salmo salar)

10.2307/5613 ◽  
1992 ◽  
Vol 61 (3) ◽  
pp. 585 ◽  
Author(s):  
Neil B. Metcalfe ◽  
Peter J. Wright ◽  
John E. Thorpe
Keyword(s):  
Atlantic Salmon ◽  
Social Status ◽  
Salmo Salar ◽  
Subsequent Growth ◽  
Atlantic Salmon Salmo Salar ◽  
First Feeding ◽  
Otolith Size

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

First feeding of Atlantic salmon, Salmo salar L., under different photoperiods and light intensities

1990 ◽  
Vol 21 (4) ◽  
pp. 435-441 ◽  
Author(s):  
S. O. STEFANSSON ◽  
R. NORTVEDT ◽  
T. J. HANSEN ◽  
G. L. TARANGER
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar ◽  
First Feeding ◽  
Light Intensities

Otolith and fish size relationships, measurement error, and size-selective mortality during the early life of Atlantic salmon (Salmo salar)

1998 ◽  
Vol 55 (7) ◽  
pp. 1663-1673 ◽  
Author(s):  
M G Meekan ◽  
J J Dodson ◽  
S P Good ◽  
DAJ Ryan
Keyword(s):  
Measurement Error ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Data Sets ◽  
Regression Analyses ◽  
Fish Size ◽  
Atlantic Salmon Salmo Salar ◽  
Weak Relationship ◽  
Growth Increments ◽  
Otolith Size

The development of the relationship between otolith and body size in Atlantic salmon (Salmo salar) between hatching and emergence was examined by repeatedly measuring individually identified fish. Otolith growth increments were deposited daily in the period between hatching and emergence. Comparison of back-calculated otolith size and standard length using least squares regression analyses revealed a weak relationship between these variables at each of the 5-day sampling intervals. However, when data sets were pooled among intervals, variation in otolith size accounted for 98% of the variation in alevin length. A computer simulation demonstrated that levels of measurement error similar to those documented in our study resulted in the failure of regression analyses to detect strong relationships between otolith and fish size. Mortality that occurred during the experiment was strongly size selective. This truncated the size ranges of fish in cross-sectional data sets and thus reduced the ability of regression analysis to detect relationships between otolith and fish size. We propose that the weak relationship between otolith and fish size at emergence recorded in previous studies was an artifact of measurement error and the truncation of size ranges in regression analyses. Differences in alevin size at emergence were present at hatching and had been propagated by growth.

Photoperiod affects timing of parr-smolt transformation, subsequent growth and incidence of sexual maturation of Atlantic salmon (Salmo salar)

Aquaculture ◽  
1994 ◽  
Vol 121 (1-3) ◽  
pp. 296-297 ◽  
Author(s):  
L. Jónsson ◽  
S.S. Árnason ◽  
B.Th. Björnsson ◽  
J. Jónasson ◽  
V. Jóhannsson
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sexual Maturation ◽  
Subsequent Growth ◽  
Atlantic Salmon Salmo Salar

Yolk Absorption, Yolk Sac Constrictions, Mortality, and Growth During First Feeding of Atlantic Salmon (Salmo salar) Incubated on Astro-turf

1985 ◽  
Vol 42 (6) ◽  
pp. 1073-1078 ◽  
Author(s):  
T. J. Hansen ◽  
D. Møller
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Lateral Force ◽  
Yolk Sac ◽  
Artificial Substrate ◽  
Feeding Period ◽  
Atlantic Salmon Salmo Salar ◽  
First Feeding ◽  
Flat Screen ◽  
Yolk Absorption

Groups of pooled Atlantic salmon (Salmo salar) eggs were incubated in a "California" incubation system with and without astro-turf, an artificial substrate, and later transferred to separate feeding units. Alevins reared in astro-turf absorbed their yolk sac faster and more efficiently than alevins reared on a flat screen. Alevins reared on the flat screen developed yolk sac constrictions probably due to the backward and lateral force created by the high swimming activity. No such malformations were found on the yolk sacs of the astro-turf reared alevins. The fry hatched without astro-turf grew faster than the fry hatched with astro-turf during the initial feeding period, but later this was reversed. Mortality of alevins and fry hatched with astro-turf was lower during incubation and during first feeding.

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