1. Faculdade de Zootecnia e Engenharia de Alimentos, Laboratório de Aquicultura, Universidade de São Paulo, Av. Duque de Caxias Norte 222, São Paulo 13635-900, Brazil
2. Wageningen Livestock Research, P.O. Box 338, 6700 AH Wageningen, The Netherlands
3. Department of Processing Technology, Nofima, 4068 Stavanger, Norway
4. Akvaplan-niva, Fram Centre, 9296 Tromsø, Norway
5. Department of Statistics, Federal University of Paraná, Curitiba 81531-980, Brazil