Freshwater performance of all-female diploid and triploid Atlantic salmon

  • Galbreath P
  • Jean W
  • Anderson V
 et al. 
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Abstract

Comparisons of freshwater survival and growth were made between diploid and triploid all-female Atlantic salmon (Salmo salar). All-female fish were produced using sperm from sex-reversed gynogenetic males and triploidy was induced by heat shock. At 4 months post-initiation of feeding the fry were placed in separate replicated rearing tanks for a 16-week early growth trial. Initial and final average weights were 1.3 and 11.0 g/fish, respectively, for diploids, and 1.1 and 11.9 g/fish, respectively, for triploids. Growth rate of triploids was significantly higher than that of diploids (P=0.028). Following the early growth trial the triploids and diploids were pooled in a single large tank and raised until completion of smoltification at 17 months post-initiation of feeding. Average weight at this time was significantly greater for diploids (94 g/fish) than for triploids (76 g/fish) (P

Author-supplied keywords

  • Growth/fish
  • Ploidy
  • Salmo salar

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Authors

  • Peter F. Galbreath

  • William St Jean

  • Valerie Anderson

  • Gary H. Thorgaard

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