The effect of triploidy on juvenile Atlantic salmon (Salmo salar) response to varying levels of dietary phosphorus

Download
  1. Get@NRC: The effect of triploidy on juvenile Atlantic salmon (Salmo salar) response to varying levels of dietary phosphorus (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.aquaculture.2010.05.002
AuthorSearch for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleAquaculture
Volume306
Issue1-4
Pages295301; # of pages: 7
SubjectDigestibility; Nutrition; Phosphorus; Proximate composition; Salmon; Triploidy
AbstractAlthough triploidy induction is a reliable method for producing sterile fish for aquaculture and fisheries management, little is known about how triploidy influences nutrition and bioenergetics of fish. The aim of this study was to determine whether triploidy affects nutrient uptake and body composition in fish, using juvenile Atlantic salmon (Salmo salar) as the test species and varying the levels of dietary phosphorus. Triplicate groups of sibling triploids and diploids (45. g initial weight) were fed isocaloric diets with 0.76, 0.99 and 1.39% total phosphorus in a 12-week growth trial, followed by a feed digestibility trial with diets having 0.67, 0.93 and 1.15% total phosphorus. Triploids had a higher growth rate and lower condition factor than diploids during the growth trial, with no difference in feed conversion ratio. Whole-body lipid and energy levels, as well as nitrogen and energy efficiency ratios, were higher in the triploids, but ash and moisture levels were lower. Triploids initially had lower plasma phosphorus levels than diploids, but on the final sampling day there was no difference between ploidies in levels of plasma phosphorus, bone ash and phosphorus within the bone ash. Apparent digestibility coefficients for phosphorus, ash and dry matter were not significantly different between triploids and diploids. The observed effects of triploidy on growth and body composition therefore cannot be attributed to phosphorus utilization and metabolism.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Marine Biosciences
Peer reviewedYes
NPARC number17676087
Export citationExport as RIS
Report a correctionReport a correction
Record identifier68e67bb9-f65d-4289-8c77-6dd034f849ac
Record created2011-04-02
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)