Growth, survival, and food conversion of Atlantic salmon reared at four different densities with common water quality

  • Soderberg R
  • Meade J
  • Redell L
  • 2

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Abstract

Our objective was to determine the maximum effective rearing density for Atlantic salmon (Salmo salar ) at 17.5 degree C, a temperature typically used in hatcheries to accelerate growth. We reared 5.8-g (mean weight) parr for 80 d to final rearing densities of 14-55 kg/m super(2) (rearing unit bottom area) or 80- 310 kg/m super(3) (rearing unit volume). Weight gain was slightly depressed in fish at a final rearing density of 26 kg/m super(2) (146 kg/m super(3)), but mortality, food conversion, and gain in length were not affected. At densities greater than 26 kg/m super(2), fish growth was slower and food conversion was higher, but mortality was unaffected. Atlantic salmon may be reared at 17.5 degree C to densities of at least 14 kg/m super(2) (80 kg/m super(3)) without adverse effects on growth and health, but final rearing densities should not exceed 26 kg/m super(2). Our objective was to determine the maximum effective rearing density for Atlantic salmon (Salmo salar ) at 17.5 degree C, a temperature typically used in hatcheries to accelerate growth. We reared 5.8-g (mean weight) parr for 80 d to final rearing densities of 14-55 kg/m super(2) (rearing unit bottom area) or 80- 310 kg/m super(3) (rearing unit volume). Weight gain was slightly depressed in fish at a final rearing density of 26 kg/m super(2) (146 kg/m super(3)), but mortality, food conversion, and gain in length were not affected. At densities greater than 26 kg/m super(2), fish growth was slower and food conversion was higher, but mortality was unaffected. Atlantic salmon may be reared at 17.5 degree C to densities of at least 14 kg/m super(2) (80 kg/m super(3)) without adverse effects on growth and health, but final rearing densities should not exceed 26 kg/m super(2)

Author-supplied keywords

  • ASFA
  • ATLANTIC SALMON
  • C
  • CURRENT CONTENTS
  • DENSITY
  • EFFECTS
  • FISH
  • GROWTH
  • HATCHERIES
  • LENGTH
  • MORTALITY
  • PARR
  • REARING
  • SALMON
  • SURVIVAL
  • Salmo
  • Salmo salar
  • TEMPERATURE
  • UNITS
  • effects on
  • food conversion
  • quality
  • water
  • water quality
  • weight

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Authors

  • R W Soderberg

  • J W Meade

  • L A Redell

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