1. Laboratory of Genetics and Aquaculture, Universidad de Los Lagos, P.O. Box 933, Osorno, Chile
2. School of Biological Sciences, University of Wales, Swansea, Swansea SA2 8PP, Wales, U.K.
3. Laboratory of Aquaculture and Artemia Reference Center, University of Ghent, Rozier 44, B‐9000 Ghent, Belgium