TY - JOUR T1 - Research Article: Effects of four factors on Penaeus monodon post-larvae cannibalism TT - JF - IFRO JO - IFRO VL - 20 IS - 2 UR - http://jifro.ir/article-1-3863-en.html Y1 - 2021 SP - 547 EP - 557 KW - Penaeus monodon KW - Cannibalism KW - Individual size KW - Post-larvae density KW - Food KW - Aeration N2 - In order to study the cannibalism behavior of Penaeus monodon 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 Penaeus monodon post-larvae. High stocking density and differences of individual size could induce and stimulate the cannibalism. M3 ER -