The result showed that the chromosome number of ?Nibea diacanthus? was 48; and its karyotype formula was 2?n?=48=48 ?t?,?NF?=48; it was the same as the other croakers determined,except ?Pseudoceana crocea? in Sciaenidae.

• 结果表明:其染色体组型为:2n=48=24t；nf=48.；在已进行过染色体组型分析的石首鱼类中；除大黄鱼外；染色体组型均为2n=48t