Improved estimates of a growth model and body composition of rainbow trout, Oncorhynchus mykiss (Walbaum 1792) as function of feeding level, temperature and body size

Gorm Rasmussen*, Jon From

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The parameters in a growth model have been estimated from tank experiments with rainbow trout up to about 2000 g wet weight. Feeding experiments with commercial dry feed at temperatures from 5 to 20.1°C and in days up to about one month during each experiment were performed. Faeces, excretions and respiration were estimated from daily samples. The body compositions of fish of different sizes and fed with different feeding levels were analysed. A growth model baesd upon energy flow and partitioning was set up. The growth rate and the population of the different terms in the budget of energy and nitrogen can be calculated for fish sizes up to about 2000 g wet weight and varying temperatures up to 20.1°C. The growth model was used to predict the course of groth and total food consumption with varying temperatures and feeding regimes.
Original languageEnglish
JournalDana
Volume9
Pages (from-to)15-30
Number of pages16
ISSN0106-553X
Publication statusPublished - 1991

Keywords

  • Growth
  • Growth model
  • Body composition
  • Rainbow trout
  • Feeding level
  • Temperature
  • Body size

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