Ecosystem Health Assessment of the Egong Bay Fisheries Area in Shenzhen Based on Index of Biological Integrity of Fish

摘要

[Objective] The ecosystem health of the Egong Bay fisheries area in Shenzhen was assessed, based on the index of biological integrity of fish ( F -IB I), for the reference of ecological restoration in typical fisheries area in the coast of South China Sea. [Method] Based on four seasons survey from August (summer) and November (autumn) in 2012 to February (winter) and May (spring) in 2013, six indicators including total species number of fish, percentage of Sciaenidae species, percentage of Sparidae species, percentage of planktivorous species, percentage of benthic-feeding species and percentage of benthic - feeding and piscivorous species, were used in computing F-旧I of Egong Bay. ^was tested by principal component analysis (PCA) and Pearson correlation analysis. [Result] Total species number of fish, percentage of Sciaenidae species, percentage of Sparidae species, percentage of planktivorous species and percentage of benthic - feeding species were major assessment indicators for Egong Bay fisheries area. F-IBI of Egong Bay fisheries area was correlated with water temperature, salinity, chemical oxygen demand (COD) and petroleum, and was negative correlation to pH, dissolved oxygen (DO), dissolved inorganic nitrogen (DIN), reactive phosphate (PO43- P) , and suspended matters. There were significant correction between the F-IBI with the salinity, COD, and suspended matters.[Condusion] F-IBI system, based on total species number of fish, percentage of Sciaenidae species, percentage of Sparidae species, percentage of planktivorous species, percentage of benthic-feeding species and percentage of benthic-feeding and piscivorous species was feasible in Egong Bay fisheries area.