Abstract: The species composition of fish eggs and larvae was investigated by horizontal trawling associated with vertical trawling with a zooplankton net in 46 sampling sites in coastal waters of the Liaodong Bay via 4 cruises, in which the horizontal trawling were for 10 min duration at a speed of 2.5 to 3.0 kn on the sea surface, while the vertical trawling were from surface to near-bottom at a speed of 0.5 m/s at each sampling station, conducted at the same 46 stations in May, July, September and October of 2008. It was found that 7724 eggs and 229 larvae of fishes belonging to 32 taxa were collected, in which 29 taxa were identified as species, belonging to 9 genera, 21 families and 28 orders, 2 taxa were identified to only family level, and one failed to be identified. The main spawning groups were Joyner’s tongue-sole Cynoglossusjoyneri, Japanese anchovy Engraulisjaponicus, Belenger’s jewfish Johniusbelengeri, drum Larimichthyspolyactis, Konosiruspunctatus, sardine Sardinellazunasi, and mackerel Scomberomorusniphonius, and the main spawning ground was found in northern waters and Changxing Island waters in Liaodong Bay. There was slightly less spawning species in the 2008 survey compared with the 1998 survey, especially the number of eggs and larvae. The effective measures for protection of spawning grounds in Liaodong Bay are suggested including control of fishing intensity, development of artificial reefs,and establishment of germplasm resources protection zones, and standard of ecological damage compensation for sea.
于旭光, 董婧, 李轶平, 付杰, 李玉龙, 王爱勇, 段妍, 柴雨, 王小林. 辽东湾近海鱼卵、仔稚鱼种类组成和保护分析[J]. 大连海洋大学学报, 2018, 33(3): 370-378.
YU Xu-guang, DONG Jing, LI Yi-ping, FU Jie, LI Yu-long, WANG Ai-yong, DUAN Yan, CHAI Yu, WANG Xiao-lin. Species composition and protection of fish eggs and larvae in the coastal waters in Liaodong Bay. Journal of Dalian Ocean University, 2018, 33(3): 370-378.
2018, Vol. 33 
