Species diversity analysis of ichthyoplankton in Luoyuan Bay in summer of 2009

Based on the data collected from the ichthyoplankton survey in Luoyuan Bay in July 2009, the species dominance, diversity and the relationship with environmental factors of ichthyoplankton were analyzed. The results showed that there were 21 species of ichthyoplankton collected in the survey, including 11 species eggs and 15 species larvae. For fish eggs, the dominant species were Stolephorus commersonli and Thrissa mystax, while for larvae, the dominant species were Thrissa mystax and Leiognathus sp. In the survey area, diversity index for larvae was less than fish eggs, and the dominant species with high dominance was prominent in larvae. The highest value of diversity for fish eggs and larvae, occurred in zoneⅠand zoneⅡ, respectively. The correlation analysis indicated that the diversity index of fish eggs in Luoyuan bay in summer had a significant positive correlation with salinity.