Science. 1965 Jul 30;149(3683):555-8. doi: 10.1126/science.149.3683.555.
Adults of three cichlid species, Hemichromis bimaculatus Gill, Cichlasoma nigrofasciatum (Gunther), and Pterophyllum sp., produce sounds of apparent biological significance. Both sexes of H. bimaculatus produce sounds, but whether both sexes in the other species produce sounds has not been established. The most intense tone frequencies in H. bimaculatus and C. nigrofasciatum lie generally between 300 and 500 cycles per second. The sound produced by Pterophyllum sp., however, has a broad maximum intensity around 3500 cycles per second and component frequencies over 10,000 cycles per second. Sound production appears to depend on the aggressiveness of the individual.
三种慈鲷科鱼类，即双边鱼（Hemichromis bimaculatus Gill）、黑带丽鱼（Cichlasoma nigrofasciatum (Gunther））和神仙鱼（Pterophyllum sp.）的成鱼会发出具有明显生物学意义的声音。双边鱼的雌雄两性都会发声，但其他两种鱼类的雌雄两性是否发声尚未确定。双边鱼和黑带丽鱼的最强音调频率通常在每秒 300 到 500 赫兹之间。然而，神仙鱼发出的声音在每秒 3500 赫兹左右有一个宽广的最大强度，并有超过每秒 10000 赫兹的组成频率。声音的产生似乎取决于个体的攻击性。
