Wubie, Alemayehu , Ethiopian Institute of Agricultural Research (EIAR) - National Fishery and other Aquatic Life Research Center, P. O. Box 64, Sebeta, Ethiopia Wujdi, Arief , Research Institute for Tuna Fisheries, Jl. Mertasari No. 140, Sidakarya, Denpasar, Bali - 80224, Indonesia