Abstract:
Density, biomass and distribution of benthic macrofauna in the eastern coast of the Gulf of Thailand were investigated. The study area was from Laem Chabang to Pattaya. Samples were collected six times during October 1989 to August 1990. Environmental facters such as salinity, temperature etc. were measured. Total organic content, grain size and type of sediments were determined.The results showed that benthic macrofauna were found in 11 groups. The relative density of dominant groups were polychaetes (77.50%), crustaceans (13.16%), molluscs (2.25%), echinoderm (1.80%), and others (5.29%). the average density and biomass of benthic macrofauna were 127.06 and 10.09, respectively. Somne correlation coefficient of benthic macrofauna and some environmental factors were found to be significant. The diversity index and similarity index of benthic macrofauna among different stations were considered.