Determining seasonal dominant fish eggs and larvae species groups in the west of Tonkin Gulf

From 2003 to 2016, 1,649 samples were collected, covering both the time and space of Gulf Tonkin. The results have identified groups seasonal dominant fish eggs larvae: Seven species in Spring, nine Summer, six Autumn, four Winter. index (Yi) ranges from 0.02 0.26 depending on group each season year, highest Goby - Gobiidae (Yi = 0.26) achieved followed by Herringgroup Clupeidae reaches Yi 0.20 Summer Anchovy Engraulidae 0.16 Summer. advantage is only 0.09 Winter for Unicorn cod Bregmaceros macclelandi. During this period, number taxa indexes tended decrease Spring slightly.