Study of composition and abundance of Zooplankton between Nayband Bay & Qeshm Island in Persian Gulf

Identification of zooplankton groups and their abundance was conduvted in 5 designated transects along 130 mile between Nayband Bay and Qeshm island from spring 2011 to winter 2012 .Sampling was done by pulling Bongo net of 110 micrometer mesh size obliquely from near the sea bed to the surface . Parameters such as salinity, temperature and oxygen were also recorded. Totally, the most dominant group was Copepoda with relative density of 44%, followed by Protozoa 24% and Mollusca 17%, respectively. Maximum zooplankton density was observed in winter (average 3272.1 1927), while minimum density was in spring (average 861/3 285/3). No significant difference was found among seasons. The peak abundance was observed in winter.