en aquaculture aquaculture كاربردي Orginal research papers In order to study the cannibalism behavior of <em>Penaeus monodon</em> post-larvae, the effects of four internal and external factors, such as individual size, post-larvae density (50, 80, 110, 140, 170 ind/L), food abundance and aeration, on the cannibalism rate were analyzed. The results showed that the cannibalism rate was significantly affected by individual size, post-larvae density and food abundance. When post-larval density increased from 50 ind / L to 110 ind / L，the average daily cannibalism rate increased by 358.07%. When larval density was more than 110 ind/L，cannibalism rate slightly increased. The average daily cannibalism rate decreased by 69.81% in 20 ind/mL food group than that of no-food group. The mix of individuals in different sizes could increase cannibalism rate significantly. Sufficient aeration could decrease cannibalism rate. The results indicated that insufficient food was a main reason to cause cannibalism in <em>Penaeus monodon</em> post-larvae. High stocking density and differences of individual size could induce and stimulate the cannibalism．<br> &nbsp; Penaeus monodon, Cannibalism, Individual size, Post-larvae density, Food, Aeration 547 557 http://jifro.ir/browse.php?a_code=A-10-3317-1&slc_lang=en&sid=1 S. Jiang tojiangsong@163.com 100319475328460039325 100319475328460039325 No South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences F.L. Zhou 100319475328460039326 100319475328460039326 No South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences X.Y. Zeng 100319475328460039327 100319475328460039327 No South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences Q.B. Yang 100319475328460039328 100319475328460039328 No South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences J.H. Huang 100319475328460039329 100319475328460039329 No South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences L.S. Yang 100319475328460039330 100319475328460039330 No South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences S.G. Jiang 515641795@qq.com 100319475328460039331 100319475328460039331 Yes South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences