Abstract:

The cannibalistic behavior was serious in Takiugu Rubriges young fish. Seedling survival rate was decreased, taking effective measures to prevent cannibalistic behavior of Takifugu rubriges. From April to July of 2011, laboratory experiments were conducted with T. rubriges young fishes (total length 9.8-24.9 mm) in different treatments, the factors including the stocking density, the turbidity of water, hungry, feeding method, body sizes. The results showed that: T. rubriges young fishes (total length 9.8-24.9 mm) bited from head and swallowed the prey basidly. The cannibalistic behavior of the young fish became furious. The differences in body sizes, feeding method, hungry, the stocking density had influence on the cannibal behavior of the young fishes. It was suggested that insufficient diet was a main reason causing the cannibalism among T. rubriges young fishes, and at the time of the high stocking density, the rate of cannibalistic death was 58%; The differences in body sizes and high stocking density could induced and stimulated the cannibalism. But the turbidity of water had no significant effect on cannibalism. At the stage of the averal tolal length 10.8-20.0mm, cannibalism was worst.