Abstract

The Swedish breeding program for Arctic charr (Salvelinus alpinus L.) has been running for 30 years and includes seven selected generations. In this study, we evaluated the differences in growth between the first generation of selected Arctic charr and the present generation. We demonstrate that not only has growth been improved through selective breeding but also that a change in the seasonal growth capacity has occurred. Selection has induced a high winter growth capacity, but the largest weight gain between generations was seen during summer. As a result of selective breeding, the production time to reach a slaughter weight of 600-700 g has been reduced by 10 months since the start of the breeding program in 1985, and improvements in the final weight have been of the magnitude of 11% per generation. To be able to keep up with the faster growth and altered seasonality of this strain, feeding management needs to be adapted. In this study, a model based on the theoretical energy need of the Arctic charr is presented, which makes it possible to make such adaptions in feeding management.

Keywords

Arctic charr; Breeding; Feeding management; Energy need; Seasonality

Published in

Aquaculture
2018, Volume: 495, pages: 428-434
Publisher: ELSEVIER SCIENCE BV

SLU Authors

• Carlberg, Hanna

  • Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
    

• Brännäs, Eva

  • Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
    

• Alanärä, Anders

  • Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
    

• Nilsson, Jan

  • Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Fish and Aquacultural Science


Publication identifier

DOI: https://doi.org/10.1016/j.aquaculture.2018.06.008

Permanent link to this page (URI)

https://res.slu.se/id/publ/96143