Species composition and biomass distribution of fish eggs at inshore spawning site of Lsi fishing ground

From April to July, 2008, by setting up 31 survey stations within the closed fishing area for bottom trawl fishery in Lsi fishing ground (32~34N), we conducted 4 investigations to study the species composition and biomass distribution of fish eggs in that area. Altogetherfish eggsof 12 specieswere found. The dominant species are Scomber japonicus (April), Ilisha elongata (May), Engraulis japonicus (June and July). The average biological density of fish eggs vertically is 1.71 indm-3 (2.06 indm-3 in April, 2.77 indm-3 in May, 0.566 indm-3 in June and 1.35 indm-3 in July), while the average biological density horizontally is 6.675 indmin-1 (1.284 indmin-1 in April, 6.916 indmin-1 in May, 1.977 indmin-1 in June and 5.323 indmin-1 in July). The fish eggs in Lsi fishing ground distribute more in the north than in the south.