Spatial-temporal distribution of common carp (Cyprinus carpio) in Iranian waters of the Caspian Sea

The main objective of the present study is to determine spatial and temporal distribution of common carp in depths 2-100 m in Iranian waters of the Caspian Sea, during 2007-2011. Seasonal sampling data collected by using bottom trawl in 57 stations. The results showed that the maximum catch and average of CPUE (±S.E.) were 39.0 kg and 0.98±0.35 kg/0.5 hr-1 in depths of 2-10 m in 2011 spring. The bulk stock concentrated in depths <20 m in eastern region (from Amirabad to Hasangholi), which seasonal averages of CPUE were 0.69±0.62, 1.08±0.41, 0.16±0.10 and 0.46±0.14 kg/0.5 hr-1 in spring, summer, autumn and winter in the region, respectively. High concentration of carp in the eastern region could be due to stock enhancement program of carp which conducted by Iran Fisheries Organization.