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Background: Diazinon is one of the most common pesticides in the world playing a similar role to radiation and it could cause DNA breaks and genetic effects. Objective: In this study, radiosensitivity of a lymphoblastic cell line pretreated by Diazinon was investigated. Material and Methods: In this case-control study, the human lymphoblastic T-cell line was divided into 6 groups based on receiving radiation or/and Diazinon. After that, the DNA damage, in all of the groups, were counted by cytokinesis-block micronuclei assay using different indices. Results: The mean frequency of micronuclei, nuclear bridges and nuclear buds in cell groups exposed by both Diazinon and radiation were remarkably higher than the other groups which just received radiation or Diazinon alone. The interaction between radiation and Diazinon treatment was statistically significant for NBUDS index. Conclusion: The results indicated that the Diazinon contamination could affect the radiosensitivity index of cancerous cells while further molecular and in-vivo studies are needed to investigate genetic and toxic effects of Diazinon on DNA and its repair system.

Shrimp is one of the most important aquatic animals,that have decreased their stocks in Hormozgan province, especially the eastern province . Evalution of food interaction in shrimp habitats (Estuaries of Tyab, Yek shabeh, Laft and Khouran) was studied with Ecopaht with Ecosim software (ver. 6.5) in Hormuzgan province. After entering the input components (Biomass,P/B and Q/B), model was balanced and outputs were extracted. Results of trophic levels, was close to previous research in these areas for all species in estuaries. Maximum of ecotrophic efficiency was belonged to phytoplankton and other preys that were observed in predator stomachs. Biological future of food web estimated to be threatened based on omnivore index of planktonivore groups. Maximum food competition between the four food models was estimated in detritivores communities in Laft estuary, that may be related to the low density of mangrove in this region. Khamir estuary ecosystem could be more stable, because each impacting group had its own separate ecological niche and special predation territory. key indices in each of four food models were related to phytoplankton communities, this key role has been demonstrated much better in Yek Shovy estuary than others. Future of commercial shrimp stocks will be expected to be in better condition in Khoran estuary compared to other three ones, due to selection of separate ecological niche by predators and High biomass of detritus in this estuary.

This study focused on population structure, biodiversity, and abundance of the Chitgar Lake fishes in October 2014. Based on the lake location fishes samples were collected at 34 stations in water body. In this study identified 8 family belong to 18 species comprised of Cyprinidae (11 species), Cichlidae (one species), Loricariidae (one species), Pangasiidae (one species), Serrasalmidae (one species), Poeciliidea (one species), Salmonidae (one species), and Scaridae (one species) were Identified. Among the fishes just one native fish from Capoeta bohsei species observed during the study. The dominant lake fishes were invasive species Hemiculter leucisculus, Alburnus hohenackeri, Carassius auratus, Carassius gibelio and Pseudorasbora parva. The highest abundance of fishes were H. leucisculus 62 % and A. hohenackeri 35 % by Seine net. Furthermore, those were dominant abundance (69 and 12 % respectively) in Gill net method. Finally in Cast net method A. hohenackeri 38 %, Pseudorasbora parva 21 % and H. leucisculus 17 % were dominated in the shore region. The lowest fishes abundance were P. hypophthalmus and Parrotfish. Overall more than 90 % of the fishes population were invasive and alien species. Thus, the present of invasive fishes and predator fishes luck in the Chitgar lake might be reason for ecosystem ruin, algae bloom, feed competitive, fish disease and trophy level rises.

The Caspian Sea is an important source of water in terms of having valuable resources of sturgeon and bony fish is taken into consideration roach(Rutilus rutilus caspicus (L.)) is one of the most important commercial species in the southern coast of the Caspian Sea in Iran , the catch of this species has declined substantially in the last 10 years, The management and exploitation need of comprehensive review of its biology .This study as part of a comprehensive study of feeding , spawning and growth of this species.In this study, using samples caught in beach seine along the southern coast of the Caspian Sea coastal ( Iranian waters ) took place. The fork length and total weight ranged between 12.5 to29.5(cm) and 29 to293( grm),10.5 to23(cm) and17.2 to21(grm) in Golestan and Gilan Province respectively. The b value of the length-weight relationship ranged 3.02 to 3.25 and 3.28 to 3.75 for female and male, in Golestan and Gilan Province respectively. The age composition of the catch was from 1 to 4 year in both Province, there was one spawning peak and Fecundity variations were high and ranged 7260 to 231965 eggs. Average growth in length was described with the Von Bertalanffy growth model: L (t) = 30.94(1-exp (0.42(t-0.18) and L (t) = 20.49(1-exp (0.53(t-1). The percent of empty stomach and prey dominant evaluated during different seasons by specific formula. Result showed that gastropod, Polychaete worms and molluscs were dominated and specific food items respectively. Shrimp, fish, insects, zooplankton and clams were scare of prey.

The Caspian Sea is the biggest lacustrine water source. Common carp is very important commercially in south coastal line of Iranian Caspian Sea waters, especially in east coastal line, because eighty percent annual catch of this species has been caught in this area in particular. Despite the common carp importance and value in Iran, but there is a little information about its biology in natural system. This study is comprehensive research on reproduction, growth and feeding. The specimens were caught by beach seine net in coastal line of Iranian waters. The fork length ranged between 5.6 and 2866.2 g. The b value of the length-weight relationship ranged from 2.843 to 2.924 for female and male, respectively. The age composition of the specimens was from 1 to 11 year. The gonadosomatic ratio (GSR) changed from 2 to 12. There were two peaks of GSR in April and December, so that the latter peak was much shorter than the first that. Fecundity variations were high and ranged 77448 to 430745 eggs. It observed linear significant correlation in fecundity- weight (r=0.98) and fecundity-length (r=0.88) relationships. Average growth in length was described with the Von Bertalanffy growth model: L (t) = 60.5(1-exp (0.19(t-0.65). The percent of empty stomach and prey dominant evaluated during different seasons by specific formula result showed that in Cyprinus carpio prey Molluscs was dominated and specific food items. Empty stomachs in winter and spring were higher and lower, respectively. Iranian Fisheries Science Research Institute Published

The present study was carried out in the fishing landing center in khozestan using the commercial catch data. The data of total cutch of fishes and effort were prepared from the deputy of statistic office. Based on the pre data, the effort of gill-net fishery was being decreased from 1996 to 2000 and then had a trend to increase from 2001. The maximum and minimum of trap fishery of dhows ware observed 2005 and 1996 respectively. The maximum and minimum of total catch were observed in 2005 in Hilsha shad and Spanish mackerel with 4174.95 tones and 73.33 tons respectively. In this year the total catch of silvery pomfret and tiger tooth croaher species were recorded 323.6 tones and 1700.44 tons respectively. The growth parameters of Hilsha shad were estimated from 10071 specimens in Abadan and 4032 specimens of length frequencies from Hendijan, statistic program of t-test was used for the mean total length and the results showed the significantly different (p < 0.05) in the two areas during 12 months. The Von Bertalanffy growth parameters were estimated from the FISAT II and ELEFAN.The asymptotic length (L) was estimated using the Powell – Vetheral method in Abadan and Hendijan, 42.74 cm and 37.02 cm respectively. Growth coefficient or K for both areas were 0.77 and 0.71 per year respectively. The instantaneous rotes of total mortalities (Z) were estimated from length-converted catch curves and the values were at 2.55 year^-1 for Abadan and 2.81 year^-1 for Hendijan. The instantaneous rate of natural mortalities (M) and fishing mortalities (F) for both areas, Abadan and Hendijan were 0.75 year^-1, 0.732 year^-1 and 1.8 year^-1, 2.078 year^-1 respectively. The exploitation rates (E) for both populations were 0.7 year^-1 in Abadan and 0.73 year^-1 in Hendijan. However the optimum level of E should be 0.5 and the estimated valves of E is more than 0.5 and shows the pressure of fishing effort and overexploited on the population of this stock. The instantaneous rate of total mortalities of Tiger tooth croacker was 1.95 year^-1 the instantaneous rate of natural mortality using Pauly empirical formula was estimated 0.7 year^-1 and fishing mortality were 1.52 year^-1. The exploitation rate for this species was calculated 0.62 year^-1. The values of M and F for silvery pumfret were obtained 0.91 year^-1 and 1.47 year^-1 respectively. The exploitation rate was estimated 0.61 year^-1.

Iranian Fisheries Science Research Institute Published