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Shrimp aquaculture as one of the most important activities in the world and Iran is expanding. Bacteria and fungi of the most common infectious agents causing diseases are in the hatchery and shrimp. The most important bacteria causing diseases in the hatcheries and shrimp Farms, bacteria are Vibrionaceae family. The fungi can be identified as Fusarium, Mucor, Cladosporium, Aspergillus, Penicillium and yeast. Utilized of water supply system in this project for breeding and reproduction of shrimp is a controlled system. The purpose of this action, control and stabilization of water quality during the breeding period and in all sectors. This system act as a part of biological security. Incoming water before the utilization was monitored for the total bacteria count, fungi and as well as Vibrionaceae family, each 15 days. If contamination is too predictable, additional tests and necessary treatments were carried out to improve the quality of the water. The water, after use in the system and after passing through the filtration system, was guided out.

After the outbreak of various viral diseases, specifically white spot syndrome (WSS) in farmed Litopenaeus vannamei in the past few years, this non-native shrimp species in Iran requires a generator-builder with specific a pathogen-free approach. This Research was done by the Iran Shrimp Research Center (ISRC) to access accurate information regarding specific pathogen-free shrimp production and avoid using shrimp broodstock production through foreign investors. This research was part of the molecular viral study. For this trial, selected shrimps in farms were sampled and screened for main viruses (OIE list). Shrimps without infection were brought to the quarantine system for one month and at the end of the quarantine they were screened again. In addition, in winter spending, before and after spawning, it’s offspring in F1 and F2 were also screened for viral pathogens by IQ2000 kit at the Iran Shrimp Research Center lab and Iranian veterinary organization lab. All shrimp products such as fresh and consumed food were tested for OIE list at all stages during project performance and the result of tests were negative. Sequenced and molecular tests with specific primers were used to determine the presence of infected samples carrying the virus in any of the products, such as shrimp and consumed food, the infected samples. The result of all the tests during last three years, shows that all the shrimp and their food products were pathogen-free and safe to use.

Mullet and mullet products have considerable economic importance at a regional level, especially around the Caspian Sea. The leaping mullet constitutes an important part of their production. This study is the first detailed work on the age and growth of the leaping mullet (Liza saliens) from September 2012 to March 2013 in the Southern coast of the Caspian Sea. Age and growth determinations were based upon the scale samples taken from 102 fish. Marginal increment analysis was used to validate age determination. The back-calculated lengths stage estimated from the scale showed no differences between in this study. The maximum age of leaping mullet in the Southern coast of the Caspian Sea was 5 years for males and 6 years for females. The von Bertalanffy growth functions were Lt=30.415(1-e-0.275(t+0.645)) for males and Lt=34.832(1-e 0.211(t+1.009)) for females. A large spread and length overlap characterized the age groups. The estimated Length Weight relationships were common for the two sexes (W=0.079L3 ). The slope (b) values of the length-weight relationship showed that weight of leaping grey mullet in Mazandaran increased associated with length in isometric. The mean condition factor for males, females and all specimens were determined as 0.908, 0.900 and 0.897, respectively. According to sex groups, the mean condition factor of males was slightlyhigher than that of females. The total length for leaping grey mullet was determined as 23.3 cm.