ALBERT

Description: During this project Barbus grypus was cultured in monoculture and polyculture methods With Cyprinus carpio, Ctenopharyndon idellus, Hypophthlmichth molitrix and Arystichthys Nobilis fishes. The result indicates that Barbus grypus in polycuture method has special growth rate, higher weight and length, some amount of different nutrition item were used. In integrated culture system due to physicochemical condition growth was suitable.

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: In recent years the incidence of algal blooms caused by Nodularia to become one of the serious problems and is threated life of aquatic organisms in the southern Caspian Sea. Nodularia is a Blue-green algae (cyanobacteria group) and due to production of nodularin toxin is importance. In this study, the first, three species of Pseudomonas including aeruginosa, putida and fluorescens were isolated from Tajan river estuary and identified using biochemical tests and compared to standard species. The trend of Nodularia spumigena biomass (log 5) and pseudomonas species (log 7 and 8) were examined in 30 treatments for 10 days in aquarium scale. Parameters such as chlorophyll a, dissolved oxygen, phosphate and nitrate were tested at different time the same time. The results showed that the decline trend of nodularia in aeruginosa and mixed species treatments were better than other treatments and log 8 of bacterium was also more inhibitory effect than to log 7. Similar results were observed in double layer on agar medium and latter treatments had algaecide effect on nodularia. However, putida and fluorescens treatments had algaestatic properties. Concentration of chlorophyll a, dissolved oxygen and nitrate in all treatments, especially aeruginosa and mixed bacteria have been often decreased (p〈0.05). Changes of latter factors in control treatment have been relatively consistent. Although the phosphate changes at different time of relative decline, but nevertheless significant differences were observed. The parameters examined in this study were in direct contact with the algae population and decrease or increase of these factors cause significant change in algae biomass. The conclusion showed that different strains of pseudomonas are able to reduce the population of algae N. spumigena in aquarium scale and the results observed in combination treatment were better than other treatments. The challenge examination of pseudomonas and nodularia in mesocosm scale, evaluation of bacterial metabolites, and also quality and quantity analysis of chemical and biological factors involved in the process is recommended and with achieve reasonable results can be made from this indicator bacteria during algal bloom in the larger ecosystem.

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: Shadegan wetland is located in the southwest of Iran and consists of three parts water: Fresh water, tidal-coastal zones and salt water. Climate is warm and dry. Although Surface of Wetlands is different seasons, but the study area is approximately 126945 hectares. Water quality in Shadegan Wetland is brackish water to salt and the hardness of the water component is hard to classify. The BOD5 of water is shows relatively clean to be suspicious. Values of pH, temperature, dissolved oxygen, BOD5, nitrite, phosphate, ammonia and TSS than the previous year are decreased and in this study salinity has increased electrical conductivity, total hardness, TDS and nitrate. In this study have been identified 42 genuses of phytoplankton in four groups: Bacillariophycea (diatoms), Cyanophyceae, Chlorophyceae and Dinophyceae that's diatoms are the most dominant. Also 24 genuses of zooplankton have been identified in four groups: protozoa, Rotifer, Copepod and Cladocera that are rotifer are the most dominant. Doraq and Atish stations have the most of abundance of plankton. Phytoplankton biodiversity is greatest at stations Rgbh and Atish. The average annual primary production 610 gC/m2 /year and its placed the middle class on fertility. Average annual primary production in the phytobenthose 486 gC/m²/year and the average monthly range of chlorophyll a and primary production 0.54-11.65 mg/m² and 0.1-3.45 gC/m²/day respectively. The amount average chlorophyll a is greater in Gargar, Maleh and Rgbh stations. The size of the wetland sediments had not important role in the phytobenthose production. The survey identified that 14 groups of macro benthic that’s Chironomidae families have the highest frequency. The highest and the lowest frequency in Atish and Doraq stations respectively. In the all stations have high SiltClay and organic matter in sediments is more in Maleh station from other areas. Macro benthos of the Rgbh and Atish stations more presents of the larvae that’s resistant to pollution of Chironomidae. Assessment of fish stocks of the common carp pond shows that the highest biomass (52.63 kg per hectare) and lowest Shiq fish (0.33 kg per hectare). The highest biomass are in autumn (337.17 kg per hectare) and lowest in summer (83.19 kg per hectare) and the average amount of biomass in total during the year were calculated 197.57 kg per hectare Shadegan Wetland. The amount of fish is obtained about 2.62 in Shadegan, which indicates the moderate wetland condition. The most of species spawning season are overlapped with each other, which occurs in winter and spring. The length - weight of fish indicating their growth is isometric.

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: Creating a database of affiliated laboratories of the institute is organized with the aim of integrating information related to laboratories of research centers and their subsidiaries. The main objective of conducting this project in this stage is to upgrade it, establish and running one software system based on up-to-date technology of networking. In this way, in addition to organizing the centers database, a periodic report on various aspects can be done which help for implementing appropriate monitoring and management .Generally, the items that are designed and upgraded for this system include : Portal, bank of information, advanced possibilities for inputting data, searching and reporting on laboratory equipment and materials, information about calibration and repair and expiration dates of chemical materials, expertise and capabilities of personnel, providing laboratory services of institutes and research centers, direct order collecting of experiments from inside and outside of the institute, exchanging information, new test methods and sharing of new ideas and professional proposals, organizing laboratory materials, and exchange of expensive chemical materials .The advantages of this system compared to the previous version is that comprehensive, precise and updated reports can be collected easily from the general information of research institutes and centers, reports of the number of lab experts with different educational levels in affiliated centers, awareness of numbers and status of the chemical materials in the laboratories of each center, and the significant and important point is about economizing equipment, chemical materials and on time calibration, in time repairing of equipment and providing laboratories tariff and other matters.

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: The national research plan with title of "Study on health status of Iran Coldwater hatchery and rearing farms" was done in order to identification and tracking of main causative agents of recent mortality in Iran Coldwater hatchery and rearing farms and recognize of infected zones and design of landscape distribution of Epizootic Coldwater fish diseases in the country. This plan was conducted parallel and in same time in some polar provinces of Coldwater fish production such as Mazandaran, Gilan, Ardebil, West Azerbaijan, East Azerbaijan and Kurdistan in three years from 2006-2008. In this regard, about 23,21 and 20 farms in Mazandaran province, 30 farms in West and East Azerbaijan and Kurdistan provinces and 19 farms in Gilan and Ardebil were selected as randomly and tracking were done yearly from 2006-2008. This research was conducted according to regular planning consists of farms visit that was done according to statistical plan and completion of Questionnaires and sampling. The findings in Mazandaran province revealed that fish infections background and infectious diseases were increased in period of 2006-2008. In fact, 56% of all fish farms in 2006, 71% in 2007 and 85% in 2008 were recorded as infected farms. In other side, average weight of fish final products was more 500gr in consume market. So, regarding to long period of fish culture in mentioned fish occurrence of more morbidity could be expected. The streptococcus infections were most important fish bacterial diseases that have more incidence and pathogenicity in collected questionnaires. Also it revealed more occurrences in summer season in above 15oC temperature in affected fish farms. Also, Enteric Redmouth Disease (ERM) and Saprolegniasis were reported as second and third degree in examined farms. Meanwhile, findings of control, prevention and treatment of our survey revealed that using of antibiotics and detergent materials were increased in mentioned province. Indeed, 34.7% of all fish farms in 2006, 71.4% in 2007 and 75% in 2008 have applied treatment operation and using of detergent materials in affected farms. In other side, frequent using of Erythromycin antibiotic was reported several times in 2008 so fish farmer faced to Bacterial resistance and should be using from Florfenicol as alternative antibacterial. Also, in feed sampling from all fish farms about 3 fish farms in 2006 and 5 fish farms in 2008 were faced with food poisoning that originated from high TVN and peroxidase in fish food consumed. These farms revealed mass mortality that stopped after change feeding regime. In conclusion absence of fish health management could be considered as main agent of mentioned mortality in Mazandaran province. The findings of our survey in West and East Azerbaijan and Kurdistan revealed that absence of sufficient experiences in fish farmers and their neglect from water quality concepts, farm cleanness, using of suitable detergent materials for fish ponds and instruments and disability in continuous monitoring of physic-chemical factors of consumed water could be considered as most important problems. So, fish morbidity and mortality, growth decrement and low production rate were expected. Unfortunately, despite the occurrence of infectious and non- infectious diseases in examined fish farms, there were no documents and information about diseases history, clinical signs in dead fish, feeding regime, fish mortality (rate of daily mortality, age and weight of moribund fish), treatment operation, drugs usage, growth rate, physico-chemical factors and fish density. So planning for control and prevention of mentioned diseases were unsuccessful in affected fish farms. Also, occurrence of some epizootic fish viral diseases such as VHS, IPN and IHN were observed frequently with mass mortality about 40100% in some examined fish farms that produced some tragic economic lost in the mentioned provinces. Similarly, some bacterial, fungal and parasitic diseases were observed repeatedly in some inspected farms such as Flavobacterium, streptococcus infections. Also, some unknown causative agents in parasitic diseases were observed several times such as Dactylogyrus, Gyrodactylus, Ichthyophthirius multifiliis, Trichodina, Chilodonella, Diplostomum and fungal diseases such as Saprolegniasis. In conclusion it seems that absence of fish health management, inadequate rate of hygienic technical services, absence of quarantine programs for transfer of new eyed-eggs, juvenile and live broodstocks packages without health certificates from authorized organizations, uncontrolled entry of foreign eyed-eggs (France, Denmark, Australia and Armenia) and neglect in using of suitable detergent materials for fish ponds, instruments, consumed water and infected eggs, not screening of broodstocks in hatcheries could be considered as most important causative agents in occurrence of infectious diseases and main problems in affected farms in mentioned provinces. Similarly, our findings in Gilan and Ardebil provinces revealed that their problems were similar to other provinces. In fact, neglect in establish of necessary Infrastructures in fish farms and dereliction in health management concepts could be considered as main reasons of occurrence of fish infectious and non-infectious diseases in studied fish farms in mentioned provinces. In fact, often fish farms visited hadn't suitable structures without control and prevention approach. There were not observed detergent using, quarantine programs and prevention methods. Entrance of unknown persons, birds and wild animals were ordinary in mentioned farms. Unfortunately level of farmer’s knowledge was low and no training courses and extension programs were planned by authorized organizations. Meanwhile, food storages were unsuitable and food packages were stored in inappropriate situation so poisoning conditions were increased in examined farms. In conclusion it could be finalized that Coldwater fish farms in Gilan and Ardebil provinces situated in insufficient position and correction of current situation are needed urgently. In final elicitation, it would be mentioned that lack of basic infrastructures could be introduced as most important reasonfor spread of diseases, mortality and related economic losses in studied provinces. Therefore, attention to environmental affairs and access to Sustainable Development are recommended. Also consideration of biosecurity regulations and health management concepts would be important requirements for modification and reformation of Coldwater fish farms in examined provinces towards A Better Tomorrow.

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: Due to lack of access to comprehensive and up-to-date information regarding equipment, personnel, laboratory services tariffs and chemicals in the laboratories of Iran Fisheries Research Institute and felt the necessity of having this information for optimal management of the laboratories, it was decided with regard to all information needs in this area and using previous experiences in this regard as well as the experiences of other institutions and related organizations at the national (and even international) level, the system would be designed. The main purpose of implementing this plan was to establish and implement a software system based on web technology to create a comprehensive database of the Fisheries Research Institute's laboratories, so that in addition to organizing information, using periodic reports on various related areas a more appropriate monitoring and management system could be applied. Fortunately, after the design and implementation stages, the system in early January 2011 was fully applicable. The main parts of this system include portal; database; advanced data entry, search and reporting capabilities; direct tests order system and discussion forums.

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: Identification of risks in laboratories and trying to create safe conditions is very important from different aspects. The main objective of this study was to evaluate the potential risks in the laboratories of three research centers affiliated to Iranian Fisheries Science Research Institute. In order to assess and classify risks associated with working in the laboratories (11 laboratories of the Persian Gulf and Oman Sea Ecological Research Center, 9 laboratories of National Shrimp Research Center and 2 laboratories of National Aquatic Organisms Processing Center), the method of "Failure Mode Effects Analysis" (FMEA) as well as some statistical methods were used. The risk levels in all the laboratories of the Persian Gulf and Oman Sea Ecological Research Center, except for benthos laboratory, could be evaluated as moderate or high. Only in the case of the sample preparation laboratory, significant differences between the values of RPN before and after corrective action could be observed. However, in this case the corrective actions have not been effective in decreasing the risk level. In most laboratories of National Shrimp Research Center, the corrective actions were effective in reducing the risk levels (with the exception of three laboratories including contaminants, microbiology and chemistry-physics). In both laboratories of National Aquatic Organisms Processing Center, after the corrective actions, the risk levels have been sharply reduced. In general it can be concluded that FMEA is an effective method for risk assessment in the research laboratories and appropriate statistical methods can also be used for complementary analysis.

Description: Iranian Fisheries Science Research Institute

Description: Published

Description: Shadegan wetland is one the international wetland which is registered in UNESCO and it is located in south of Khuzestan. This wetland have three zones: freshwater zone, intertidal zone and coastal zone with saltwater. The wetland is located in warm and arid region. This study was done in freshwater zone with the aim of finding solutions for integrated management to improve water quality of this habitat by monitoring of environmental trends and assessing the present situation. This study was done from March 2010 to February 2011 in four area of Shadegan wetland. The water quality index results showed that all stations of Shadegan wetland are categorized as group three with moderate quality. Rogbe station have the highest quality and Maleh have the lowest quality. Finally we can conclude that wastewater of sugarcane plants have negative effect and Azadegan sewage have positive effect on the wetland, and Maleh inlet can have the most negative effect on water quality. The amount of dissolved oxygen, BOD5, nitrite and phosphate decreased and conductivity, salinity, TDS and nitrate increased that can be due to water scarcity and droughts in the region. 6 class and 54 genius of phytoplankton were identified. Bacillariophycae with 20 genius have (52%) and chlorophycae with 22 genius (14%) have the highest frequency percentage of total frequency. The average value of chlorophyll a was 10.95 mg/m3 per year and the annual average primary production was 2.68 g/c/m2 in a day which Rogbe and Maleh had the highest and lowest value respectively and eutrophication floating plankton were in high mesotrophic. 18 epipleon and 27 epiphyton genius of benthic algae were identified which Bacillariophycae and cyanophycae were dominant. Chlorophyll a was the most common pigment and The wetland diversity index indicated semi polluted situation and eutrophication statues was high mesotrophic to eutrophic and based on Palmer index, the wetland had no severe organic pollution. Brachionus spp from zooplankton rotifer increased in summer due to high tolerance of salinity. Wetland zooplankton index indicates low quality of wetland situation. In substrate with vegetation, 15 groups of macrofauna of benthos were identified and Chironomidae had the highest frequency. In sedimentary substrate, 7 groups of macrobenthos were observed which in comparison to 1995 they severely decreased. These changes can be due to drought, sewage entrance, habitat degradation and ecosystem disturbances. Satellite studies of the Shadegan wetland show that 69,945 hectares are suitable for aquatic life.

Description: Iranian Fisheries Science Research Institute

Description: Published