Map of investigation sites of tilapias in south China. AM natural preservation zone, Macau; BN Lancang River, Xishuangbanna, Yunnan Province; BS Boai River, Baise, Guangxi Province; CJ Shilu reservoir, Changjiang, Hainan Province; CM Jiatan reservoir, Chengmai, Hainan Province; CZ Han River, Chaozhou, Guangdong Province; DZ Songtao reservoir, Danzhou, Hainan Province; FZ Min River, Fuzhou, Fujian Province; GM Nongba reservoir, Lincang, Yunnan Province; GZ fish farm and pond in Sun Yat-sen University, Guangzhou, Guangdong Province; HK Nandu River, Haikou, Hainan Province; HL fish market, Hualien, Taiwan; HY Xinfengjiang reservoir, Heyuan, Guangdong Province; LZ Liu River, Liuzhou, Guangxi Province; MM Gaozhou reservoir, Maoming, Guangdong Province; NN Bachi River, Nanning, Guangxi Province; QN Lancang River, Lincang, Yunnan Province; QZ Jin River, Quanzhou, Fujian Province; SG Nanshui reservoir, Shaoguan, Guangdong Province; XM Xixi River, Xiamen, Fujian Province.