| Title |
Quality Evaluation of Off - shore Water of South - west in Korea by Bioassay using Sea Urchin ( Schaphechinus brevis ) |
| Authors |
유춘만 ; 위인선 ; 이종빈 ( C . M . Yu ; I . S . Wui ; J . B . Lee ) |
| Abstract |
This study was attempted to construct the pollution map of off shore water in south-west in korea by bioassay of sea water quality using both gamete and embryo of Schapechinus brevis and also to examine the relationship between embryo development and environmental paramenter. Sea urchin(Schapechinus brevi) gametes and embryos were inhibited strongly by seawater sampled from Youngsan river Hakun and Kwangyang bay inland sea, inhibited weakly by seawater sampled from Muan, Hampeung, Wondo, KangJin inland sea. Temperature: Pluteus was not developed at temperature less than 7℃ and Temperature is proportioned to development velocity. pH : High embryos fertilization was observed the range from pH 7.5 to pH 8.5 and gametes and embryos were strongly inibited below pH 4.5 and above pH 9.5. Salinity : High embryos formation ratio was observed at salinity 28-30‰ and sand dollar gametes and embryos were strongly inhibited below 28 and above 30‰. Sensitivity to sperm exposure time and embryos formation by natural seawater was great in 60 min exposure of sperm. The more sperm exposure time, the more normal pluteus were appeared normal pluteus formation. Embryos formation and concentration of COD and NH₃`-N, SiO₂Si were regularly correlation. |