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  • 1
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    Environmental and ecological studies in Northern Alborz (Mazanderan Province) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Caspian Sea with an area of 400 thousand square kilometers is the largest lake in the world. The Caspian Sea about 1200 km from north to south on the longest section and an average width of 320 km. Along the coastline around the Caspian Sea is about 6500 kilometers. Caspian Sea is about 78,000 cubic kilometers of water volume that is 44% of stocks of blue lakes around the world. Caspian Sea basin, which is composed of seven major basins of the main watershed from west to east are: juniper, Talsh- Anzali, large Sefidrood between Haraz Sefid and, Hraz- Gharehsou, Nagorno Sv- Gorgan and Atrak in the basin of Aras no limits to the beach. Aras sub-basin is located in the North West and Iran, the second largest sub-basin of the Caspian Sea. Talysh-Anzali on the Caspian Sea basin West and the seventh largest sub-basin of the Caspian Sea. White basin is located in the South East of the Caspian Sea and the extent of the sub-basin of the Caspian Sea. Haraz located in the south Caspian Sea basin and the ninth largest sub-basin of the Caspian Sea. Gorgan is located in the South East of the Caspian Sea basin and the fourth largest sub-basin of the Caspian Sea. In these areas, about 28 percent of the total fish production in the northern waters of aquatic allocated.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental ; Ecological
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 162pp.
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  • 2
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    Road map of warm water fish culture (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Carp aquaculture is one of Maine potential for commercial and rural development , employing enhancement and earning income .This enterprise which is conducted by using fresh water and unfertile lands have been attended in the country since last seven decades. In accordance to wide area of cultivation in the country, maximum production is about 150000 tonnes in 2010. Establishment of aquaculture center by technical deputy of president, made a suitable opportunity for preparation of carp development road map. In this report, present condition and problems in front of carp development have been analyzed , and regarding to targets of long term country development, projects for research and executive sectors have been prepared.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Aquaculture ; Warm Water ; Fish ; Carp ; Development ; Road map ; Culture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 115pp.
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  • 3
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    Environmental and ecological studies in Northern Alborz (Guillan Province) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Caspian Sea with an area of 400 thousand square kilometers is the largest lake in the world. The Caspian Sea about 1200 km from north to south on the longest section and an average width of 320 km. Along the coastline around the Caspian Sea is about 6500 kilometers. Caspian Sea is about 78,000 cubic kilometers of water volume that is 44% of stocks of blue lakes around the world. Caspian Sea basin, which is composed of seven major basins of the main watershed from west to east are: juniper, Talsh- Anzali, large Sefidrood between Haraz Sefid and, Hraz- Gharehsou, Nagorno Sv- Gorgan and Atrak in the basin of Aras no limits to the beach. Aras sub-basin is located in the North West and Iran, the second largest sub-basin of the Caspian Sea. Talysh-Anzali on the Caspian Sea basin West and the seventh largest sub-basin of the Caspian Sea. White basin is located in the South East of the Caspian Sea and the extent of the sub-basin of the Caspian Sea. Haraz located in the south Caspian Sea basin and the ninth largest sub-basin of the Caspian Sea. Gorgan is located in the South East of the Caspian Sea basin and the fourth largest sub-basin of the Caspian Sea. In these areas, about 28 percent of the total fish production in the northern waters of aquatic allocated.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental ; Ecological
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 102pp.
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  • 4
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    Feeding habits and stomach contents of Silver Sillago, Sillago sihama, in the northern Persian Gulf (2018)
    Details
    Publication Date: 2021-05-19
    Description: The study investigated the stomach content of Sillago sihama in Hormuzgan Province waters located in the northern Persian Gulf from October 2009 to March 2010. The stomach analysis was carried out using frequency of occurrence and numeric methods. Diatoms, blue- green algae and dinoflagellates constituted main food of plant origin. Diatoms were found to be the most preferable food of plant origin where it occurred in more than 60.8% of food item by number and 59.5% by occurrence. Crustacean including crabs and their larvae, shrimps, copepods, eggs and larval forms comprised the maximum part of the food of animal origin. It was concluded that Sillago sihama in the Coastal waters of Hormuzgan Province is planktonivorous and feeding on a wide range of food of planktonic and benthic organisms.
    Description: Published
    Keywords: Biology & Physiology ; Silver Sillago ; Food ; Sillago sihama ; Feeding ; Stomach contents ; FP ; Benthic
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.892-901
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  • 5
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    Growth parameters, mortality rates, yield per recruit, biomass, and MSY of Rutilus frisii kutum, using length frequency analysis in the Southern parts of the Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: The growth and mortality coefficient of Rutilus frisii kutum, were estimated using length frequency data collected in southern waters of the Caspian Sea during October 2008 to April 2009. The following population parameters were evaluated: length-weight relationship, W = 0.004L 3.258, (r= 0.976) Von Bertalanffy growth constants, W∞ (g) = 4192.3, L∞ (cm) = 70.45, K = 0.2, per year t0 = −0.75 total mortality and its components, Z = 0.92, M = 0.36, F = 0.56 per year. The exploitation rate (E) was estimated about 0.6. The current yield per- recruit was estimated to be 279.15 g, which was only 1.2% less than Maximum yield per recruitment that was estimated as YPRmax = 287.535, it means if fishing mortality increases from 0.56 per year to 0.7 per year, the yield will raise by only 1.2%. The current YPR and maximum YPR, which were gained at fishing mortality of 0.7, showed that most kutum individuals are caught before reaching the length of maturity. Therefore, to get a maximum YPR, it is necessary to increase fishing effort, even higher than the optimum level. Keeping kutum fishing at the current level will permit harvest of the sustainable yield and avoid overfishing problems.
    Description: Published
    Keywords: Biomass ; Mortality ; Rutilus frisii kutum ; Exploitation rate
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.48-62
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  • 6
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    Growth, mortality and spawning season of the spangled emperor (Lethrinus nebulosus Forsskal, 1775) in coastal waters of Hormozgan Province in the Persian Gulf and Oman Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: The population parameters and spawning season of the Spangeld emperor (Lethrinus nebulosus) were studied in coastal waters of Hormouzgan province. The monthly calculated mean values of gonadosomatic index (GSI) of females were indicate to increase from February, reach the highest in March and decline in June. The spawning season peak of L. nebulosus occurred in March. The Von Bertalanffy growth parameters, L∞, K and t0 were estimated as, 67.2cm, 0.16.year-1 and -1.161 year, respectively. The relationship between weight and length (Fork Length) can be expressed as W=0.051 L2.722, which indicates that Spangled Emperor has negative alometric growth. Using length converted catch curve, total mortality (Z) was estimated as 1.13 year-1 and natural mortality was estimated using Pauly's equation, as 0.57 per year. Finally, the fishing mortality (F) was 0.56, which gives an exploitation rate (E) of 0.50.
    Description: Published
    Keywords: Lethrinus nbulosus ; Spawning ; Growth parameters ; Mortality rates
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.161-172
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  • 7
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    The first report of Asterodiscides fourmanoiri (Echinodermata: Asteroidea) from the North Coast of Oman Sea, Iran (2020)
    Details
    Publication Date: 2021-05-19
    Description: Published
    Keywords: Asterodiscides fourmanoiri ; ASFA_2015::D::Distribution ; ASFA_2015::I::Identification ; Echinodermata
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.583-587
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  • 8
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    Investigation of the possibility use of Zataria multiflora (Avishan-e Shirazi) essence in control of fungal contamination of cultured shrimp, Litopenaeus vannamei (2018)
    Details
    Publication Date: 2021-05-19
    Description: This study was conducted to evaluate the possibility of replacing Z. multiflora instead of antibiotics and chemicals in shrimp aquaculture industry to protect the environment and prevention of microbial resistance. In vitro MIC of Z. multiflora essential oil against Candida albicans and Fusarium solani obtained 0.004% and 0.008% respectively, also MFC of Z. multiflora essential oil against C.albicans and F.solani was 0.004% and 0.04%, respectively. The results showed that 0.0002% dosage of Z. multiflora essential oil against total count of fungi in sea water (salinity 39±1ppt) can decrease growth of fungi after 6 h and 0.0004%, 0.0008% and 0.0016% dosages can decrease the total count of fungi in sea water. But very low dosage of Z. multiflora essential oil in shrimp Litopenaeus vannamei leads to mortality. Lethal dose of Z. multiflora essential oil in shrimp postlarvae, juvenile (2±0.2g) and adults (10-12 g) was 0.00050%, 0.00045% and 0.00035%, respectively. The results indicated that Z. multiflora have a significant anti-fungal effect but is toxic for L. vannamei. We recommend that Z. multiflora essential oil can be used in non-living environment, such as disinfecting tanks and equipments.
    Description: Published
    Keywords: Fish disease ; Fusarium solani ; Candida albicans ; Zataria multiflora ; Essential oil ; Antifungal ; Shrimp ; Litopenaeus vannamei ; Investigation ; Aquaculture
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.454-464
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  • 9
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    Ecological Interaction Between Commercial Fishes in the Persian Gulf (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: An ecosystem-based management fishery is a new way of looking at management of living resources. Trophic levels of basic food items, feeding habits, growth and mortality rate of 20 exploited fish species (including commercial and bycatch) are investigated in the Persian Gulf (from the provinces of Khuzestan, Bushehr and Hormozgan,) from 2010 to 2012. The model considers trophic interactions among 12 functional group of the ecosystem involving Phytoplankton, Zeoplankton, Cephalopods, Shrimp, Infauna Benthos, Epifaunal Macrobenthos, Demersal Zoobenthos Feeders, Small Pelagic Planktivorous Fish, Benthoplagic Feeder, Piscivorous, Large Benthic Carnivores And Small Benthic Carnivores. In general 7452 of stomach contents samples were analyzed based on the weight and numerical method and were detected about 40 preys. The results demonstrated gaps in our knowledge on the food web structure. The mean trophic levels were varied from L. klunzingeri (2) to S. tumbil (4.64), while the total catch of some species were fluctuating widely. Result of our study showed that Total mortality varied between 0.45 per year (A. suppositus) to 9.5 per year (P. indicus) and food consumption rate also fluctuated by 1.9 (L. johni ) to 89 (L. lineolatus). The results indicated that some fish species including sardine, Anchovies, small carangids, S. stridens with high frequency in ecosystem, have been occupied in the food web as a wasp-waist. The model showed that most hunters groups live in middle levels in the food web such as N. japonicas, A. latus, P. kaakan, L. nebolusus, P. indicus and T. lepturus . Analysis the catch rate during 2001-2011 reveled that there is a clear trend of declining most of fish species catches in this research except for T. lepturus, P. kaakan and sparids which lead to upset the fundamental ecological balance of the Persian Gulf in future.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ecological ; Commercial ; Trophic level ; Functional group ; Prey ; Trophic interaction ; Fish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 131pp.
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  • 10
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    Investigation of situation of propagation and culture of rainbow trout in north of Alborz (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The aquaculture activity in provinces of north of Iran, in spite of fast progressive and possess a series of achievement and success, there was some failure, difficulties, limitation and restriction. To planning for further expansion in this faild, this study is managed. The culture of rainbow trout is practice in individual farms, small farms, water resources, earthen ponds, recycling ponds etc, which each method have its potential , failure and limitation that are consider in the present work. At the end, based on the situation of production in past years, and considering each of factors mentioned above, the success, failure, difficulties, limitation and restriction points of aquaculture of rainbow trout in technical poin of view are investigated and some command for improvement for each production method are presented. The development of aquaculture in recent years is based on extention of farms and increasing dencity of fish in fish pond. In contrast of many production activities, the propagation and culture of fish is inconstant work. This variability makes a potential for better income, occupation and job, increasing in production etc. This study make a better planning using this activity.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Rainbow trout ; Water resources ; Fish culture ; Aquaculture ; Investigation ; Propagation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 66pp.
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