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This research was carried out to determine the concentration of heavy metals in Pacific white leg shrimp cultured in farms of Ganaveh, Deylam, Hillah, Mand, Delvar and Shif and its consumption risk. The shrimp samples were prepared based on the standard methodology. The health risk of its consumption was evaluated according evaluated according to the daily intake (DI) index. Our results showed that the shrimp reared in the Deylam site had the maximum values of toxic metals mercury, nickel, and zinc compared to other sites of Bushehr Province. The concentrations of As, Cd, Cu, Fe, Hg, Ni, Pb, and Zn in shrimp muscle were 0.021, 0.028, 11.725. 42.003, 0.095, 3.278, 0.122 and 6.748 mg/kg dry weight (DW), respectively. Based on the findings, the concentration of Cu and Ni were significantly higher than the permissible maximum recommended amounts for human consumption by the world health organization (WHO), and they were 0.38 and 10 mg/kg DW, respectively. On the other hand, the health risk evaluation of the maximum tolerable daily intake (MTDI) of heavy metals showed that daily and continuous consumption of shrimp is safe for consumers in different age groups (children, adults) and despite the high levels of nickel and copper, there is no serious risk to consumers.

The aim of this study was to comparing the effect of different hanging ratios (E=0.5 and 0.6) of drift gillnets on catch rates, length composition and Catch per Unit Effort (CPUE) in Bushehr coastal waters between late September 2010 to late March 2011. The length frequency of Spanish Makerels did not differ significantly between gillnets with 0.5 and 0.6 hanging ratios (P>0.05). A total of 55889 kg of various large pelagic species were caught during 6 cruises in six months that 26409 and 29552 kg were related to gillnets with 0.5 and 0.6 hanging ratios, respectively. The catch composition of gillnet with 0.5 hanging ratio was included: Thunnus tonggol %48.81, Euthynnus affinis %25.41, Scomberoides commersonnianus %17.02, Carcharhinus amblyrhynchoides %3.87, Scomberomorus commerson %3.39, Rachycentron canadum %1.17, Sphyraena jello%0.33 and species composition of gill net with 0.6 hanging ratio was included: Thunnus tonggol %52.18, Euthynnus affinis %24.29, Scomberoides commersonnianus %16.52, Scomberomorus commerson %3.33, Carcharhinus amblyrhynchoides %2.88, Rachycentro ncanadum %0.61 and Sphyraena jello%0.19. The CPUE did not differ significantly between two gillnets (P>0.05).

The aim of this study was to investigate and estimate the CPUE (Catch Per Unit of Effort), CPUA (Catch Per Unit of Swept Area), biomass and length frequency of Threadfin Bream (Nemipterus japonicus) in Coastal waters of Bushehr. This study was carried out in March 2011. The study area was divided into three area (Northern, Central and Southern) and depth zones (10-20, 20-30 and 30-50 m) and stratified random sampling was used to collect data. The sampling data was collected from 41 stations. The forked length of Nemipterus japonicas was ranged from 14 to 29 cm and the average forked length was calculated 20.29±2.64. Total CPUE and biomass of Nemipterus japonicas were calculated 16259 tonnes and 1771 kg/hours, respectively. The minimum and maximum CPUE were observed in 20-30 m depth zone (169.1 kg/hours) and 30-50 depth zone (1370.8 kg/hours), respectively. Total CPUA of Nemipterus japonicus was calculated 19678.8 kg/nm2. The minimum and maximum CPUA were observed in 10-20 m depth zone with 4.1 kg/nm2 and 30-50 m depth zone with 2147.7 kg/nm2, respectively. The results showed that the most abundance of Nemipterus japonicus was in higher than 30 m depth zones in Bushehr waters.