1. Inst. of Integrative Biology; Univ. of Liverpool; Liverpool UK
2. Depto El Hombre y su Ambiente; Univ. Autónoma Metropolitana-Xochimilco; México D.F.
3. Laboratory of Protozoology; Ocean Univ. of China; Qingdao China
4. Dept of Fishery Science; Tianjin Agricultural Univ.; TianJin China