Mitochondrial COI sequences revealed shallow but significant divergences among Amphioctopus aegina (Octopoda, Octopodidae) populations in coastal waters of China

Amphioctopus aegina is an important fishery resource in the coastal waters of China. In present study, genetic diversity and population structure among four populations A. throughout its distributional range China were assessed using mitochondrial cytochrome oxidase 1 (COI) sequences. The results revealed a generally low (Hd: 0.2842–0.6670; Pi: 0.0007–0.0015) populations. neighbor-joining (NJ) phylogenetic tree haplotype networks, as well molecular variance (AMOVA) analyses, indicated shallow phylogeographic However, pairwise ΦST statistics distance analyses significant (p<0.01) differentiation Qinzhou rest three Zhanjiang, Huizhou, Dongshan. demographic history expansion aegina, role Leizhou peninsula isolation shaping differentiation. These would largely enhance our understanding hence promote scientific management resources