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  • 11
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    Survey on Organic Matter Accumulation in the Anzali Lagoon Sediments (2018)
    Details
    Publication Date: 2021-05-19
    Description: Organic matter was determined in different parts of lagoon sediments during three years with annual average Of 137.32 ± 28.60 milligram in one gram dried sediment. Seasonal and horizontal fluctuations range was very clear and varied between maximum amount in emergent macrophytes region (in March, 250.00 mg/g. d.w.sed.) and minimum value in river systems (in September, 152.25 mg/g. d.w.sed.). This high organic matter is best reason for eutrophication process with regard to huge concentration of emerge, floating and submerge plants as a pollutant negative factor in spite of Caspian Sea's water level. Allochthonous matter from eleven important rivers and Authochthonous matter within lagoon during biological activities has main role in appearance of high eutrophy and it's need one scientific solution for this problem.
    Description: Published
    Keywords: Accumulation ; Annual average ; Biological ; Survey ; Organic ; Sediments ; Seasonal fluctuations ; Horizontal fluctuations ; Macrophytes ; Eutrophication process ; Pollutants ; Allochthonous matter ; Authochthonous matter ; Eutrophy
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-10
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  • 12
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    Investigating effects of the excessive growth of aquatic plants on water quality in Anzali Lagoon, south-western Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this study, excessive growth in submerged aquatic plants such as Coontail (Ceratophyllum demersum) and Pondweed (Potamogeton spp.), floating-leaved species such as Lotus (Nelumbo nucifera) and free-floating species such as Water Fern (Azolla filiculoides) in Anzali Lagoon was observed. We studied effects of excessive growth of these plants on water quality in Anzali Lagoon over the years 1998-2000. Assessed the possible effects of canopy formation and growing sites of these plants on habitat of aquatic animals was studied too. We showed that dissolved oxygen concentration (DO), pH and water temperature are associated with the growth and distribution of the aquatic plants, and established a significant relationship between vertical DO, pH and water temperature and location of canopy of these plants in the water column. Also, an increase in the amount of DO and pH in areas around the canopy and under it for submerged plants observed. This was not the case for floating-leaved and free-floating aquatic plants. The higher water turbulence in areas free from aquatic plants increased DO in lower layers of water column compared to areas covered with aquatic plants. We related the amount of DO and pH of water to growth form in aquatic plants that determines location of canopy formation in these plants. Contrary to the location of canopy and growing site factors, the extent of growth of these plants did not show an effect on DO and pH of water.
    Description: Published
    Keywords: Growth ; Aquatic plants ; Water quality ; Coontail ; Ceratophyllum demersum ; Pondweed ; Potamogeton spp. ; Lotus ; Nelumbo nucifera ; Fern ; Azolla filiculoides ; Dissolved oxygen ; DO ; pH ; Temperature
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.139-150
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  • 13
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    The Study of Establishment of Rainbow trout Culture and Hachery’s Farms on Zayanderood’s River region in Caharmahal and Bakhtiyari Province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The aim of this study was to find the best location for establishment of rainbow trout culture and hatcheries farms on Zayanderood’s river region in Charmahal and Bakhtiyari province. This survey carried out over ten station along Zayanderood’s river. The result of physical and chemical analysis showd that the annual average of air temperature varied from 9.5oc o 10oc wehre the pH annual average value were between 7.5 and 8.8. the dissolve oxygen concentration in stations except in rainbow trout farm effluent were above 10 mg/l. the other chemical , pollutant as well as pesticides levels were under the limiting concentration for rainbow trout culture and Hatcheries activity . The plankton survey showed that the Bacillurophyta were the dominant group of phytoplankton where protozoa constituted the most abundant group of zooplankton the Benthic organisms sensitive to pollutant in particular Epirus were dominant group in all stations . In regard to fishes presence in river , five species of Ciprinidae , one species from Balitoridae and one species from salmonidae families were identified . The capacity for development of rainbow trout culture for tow phase period in Zayanderood’s river region with respect to self purification potential (self purification potential were determined from the oxidation of the effluent of the only active trout farm of the river region), minimum of 10 L/s water requirement for production of trout in concrete canal and pond system and 1L/S water need for production in semi circular closed system were estimated to be 5202 metric tons.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physical ; Chemical ; Positioning ; Rainbow trout ; Self purification ; Culture ; Hatchery ; Survey ; Temperature ; pH ; Dissolved oxygen ; Pollutant ; Plankton ; Bacillurophyta ; Phytoplankton ; Protozoa ; Zooplankton ; Benthic organisms ; Ciprinidae ; Balitoridae ; Salmonidae
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 68pp.
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  • 14
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    A survey on surfactant concentration in southern Caspian Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/24699 | 18721 | 2018-08-04 16:01:57 | 24699 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: We determined concentration of surfactants as mg/I of LAS using Sublation-Methylen Blue method in the south Caspian Sea coastal areas extending from Astara to Bandar-e-Tourkaman. The method was based on the American Standard Method for Examination of Water and Wastewater. We analyzed 53 water samples and found an average surfactant concentration of 0.019mgi1 with the minimum and maximum being 0.008mg/I and 0.038mgi1 respectively. We conclude that presently, surfactant concentration is not critical in the coastal areas. However, care must be exercised interpreting these results considering the synergistic effects between the surfactants and heavy metals and oil hydrocarbons.
    Keywords: Pollution ; Detergent ; Surfactant ; LAS ; Caspian Sea ; Bandar-e-Tourkaman ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 101-108
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  • 15
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    Study of benthic macro invertebrates in the Anzali lagoon (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25822 | 18721 | 2018-10-13 10:12:48 | 25822 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The Anzali wetland (37.28N – 49.25E) with less than 100 km2 surface area is located in the southwestern shores of the Caspian Sea in the Guilan province. The benthic macro-invertebrates were studied as a part of a main project titled study of aquatic communities variation in the Anzali wetland. The sampling was performed at the 10 stations with using a Van-Veen grab during 2014-2015. The results showed, 14 macro-invertebrates taxa were identified as Chironomidae (Insecta, Diptera) and Tubificidae (Annelida, Oligochaeta), they were dominated in the wetland. The maximum and minimum densities of macro-invertebrates were observed with 609±1119 and 93.32±27.92 n/m^2 respectively at the stations 5 and 1. The silt-clay constitute more than 85 percentage of the wetland sediments with maximum of 93.2±27.92 percentage at the 2 station and minimum 72.21±27.92 at the 5 station. Kruskal Wallis non parametric test (sig. ≤0.05), revealed significant differences for all studied factors at stations while of %tom and grain size had no significant variation. The CCA analysis revealed no accordance of total organic matter (TOM ) and silt- clay percentage vectors with Tubificidae and total benthic frequencies, while Chironomidae frequency is in accordance. Intensifying eutrification process in the Anzali wetland has affected its biota as the benthic fauna are almost limited in to most tolerant taxa which reflect the day after day increasing pollution the Anzali wetland.
    Keywords: Biology ; Ecology ; Iran ; Caspian Sea ; Guilan Province ; Anzali wetland ; Macroinvertebrates ; Eutrification ; Aquatic ; Tubificidae ; Chironomidae ; Insecta ; Diptera ; Annelida ; Oligochaeta ; Benthic fauna
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 48
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  • 16
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    Survey on organic matter accumulation in the Anzali Lagoon sediments (2021)
    In:  http://aquaticcommons.org/id/eprint/23883 | 18721 | 2018-08-01 07:30:57 | 23883 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Organic matter was determined in different parts of lagoon sediments during three years with annual average Of 137.32 ± 28.60 milligram in one gram dried sediment. Seasonal and horizontal fluctuations range was very clear and varied between maximum amount in emergent macrophytes region (in March, 250.00 mg/g. d.w.sed.) and minimum value in river systems (in September, 152.25 mg/g. d.w.sed.). This high organic matter is best reason for eutrophication process with regard to huge concentration of emerge, floating and submerge plants as a pollutant negative factor in spite of Caspian Sea's water level. Allochthonous matter from eleven important rivers and Authochthonous matter within lagoon during biological activities has main role in appearance of high eutrophy and it's need one scientific solution for this problem.
    Keywords: Pollution ; Survey ; Organic ; Sediments ; Seasonal fluctuations ; Horizontal fluctuations ; Macrophytes ; Eutrophication process ; Pollutants ; Allochthonous matter ; Authochthonous matter ; Eutrophy ; Accumulation ; Annual average ; Biological ; Anzali Lagoon ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-10
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  • 17
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    The effects of slurry on larviculture of Rutilus frisii kutum and chienes carp yield and determination of efficient concentration for increasing of production (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25300 | 18721 | 2018-09-08 16:40:33 | 25300 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Rutilus frisii kutum is one of the important fish of Caspian Sea which has significant economical role in the region .The objective of this project is a comparative study on traditional culture of fishes versus slurry. This survey were conducted on nine pound of 1.7 hec triplicate with their treatment with stocking densities of 1.7 million fish larva at Dr yousefpoor center (Affiliated of Shahid Beheshti culture and propagation) at Siakal village , 32 km far from Rasht city in North of Iran, the first treatment considered as control which practice traditionally (using concentrated food plus grinded kilka fish) .In the second treatment for 13 days the pound supplied only by slurry then followed by concentrated fish food only .The tired treatment started with slurry for 13 days and followed by slurry plus concentrated food. The physical and chemical parameters of water, plankton, biometry of fish, growth indices such as daily weight growth (DWG), daily length growth (DLG) as well as specific ratio (SGR) were monitored weekly. The result indicate that net fish production was 1.7 to 2 times higher in slurry than traditional treatment also the survival rate were 1.7 times higher in slurry treatment . The treatment of slurry follow by addition of concentrated food plus slurry showed higher yield camper to others. Slurry with several active substances is more effective and can promote the growth of zooplanktons which is the food of larval stage of rutilus frisi kutum. In second phase of this project the effect of slurry was surveyed on Chinese carp. This experiment was conducted in triplicate with two treatment (one treatment is control which use cow manure plus chemical fertilizer and second treatment was conducted with slurry) and stocked with 2375 N/hec (Silver carp 60%, Big head 15%, common carp 17% and grass carp 8%) at June. In this survey common carp and grass carp were feed with concentrate food and fresh grasses respectively. Chemical factors were measured once for each two week and density of plankton was determined when it was necessarily. Nutritional content of phosphorous, nitrogen, calcium, potassium and magnesium after anaerobic fermentation as well as protein and lipid content with 1.4and 1.9 times respectively were higher in slurry treatment than control. The results showed that survival rate and yield were higher in slurry than control. The increasing percent of yield were 13.5, 2.6, 18.4 and 85.3 in Silver carp, Big head, common carp and grass carp respectively. The survival rate of grass carp was twice higher in slurry treatment than control. Zooplankton abundant in slurry pounds was more but blue- green algae density was less than control. Protein and lipid analysis reviled no significant difference between control and slurry. In general the result indicate that the slurry with higher nutritional content is more effective on the survival and growth rate of fishes and also is more efficient in proliferation of plankton in particular zooplankton.
    Keywords: Aquaculture ; Iran ; Caspian Sea ; Slurry ; Rutilus frisii kutum ; Cow fertilize ; Larviculture ; Carp ; Culture ; Plankton ; SGR ; Zooplanktons ; Silver Carp ; Big head carp ; Common carp ; Grass carp ; Phosphorous ; Nitrogen ; Survival rate ; Protein ; Lipid
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 158
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  • 18
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    The survey of Khandaghloo dam reservoir of Mahneshan city of Zanjan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25515 | 18721 | 2018-10-05 07:55:26 | 25515 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Reservoirs are one of the most constructions for control and water supply for different usage that could have various social an economical effects. The Khandaghloo dam reservoir with area of 100 ha located in Mahneshan city of Zanjan province and related to Parichay river watershed. Khandaghloo reservoir is valuable water body that the aim of its establishment was supply of water for agriculture farms. The reservoir has been studied for responsible and sustainable fisheries exploitation proposes. Results showed that the reservoir categorizes as eutroph to super eutroph based on different indices.Also phosphorous is limiting factor of the water body.Totally 42 genera from 6 phyla including green-blue algae cyanophyta, diatoms (Bacillariophyta), green algae, chlorophyta, euglenophyta, pyrrophyta and xanthophyta has been identified and cyanophyta was the dominant group that comprise 74.3 % of phytoplankton population. The zooplankton of the reservoir comprised 4 phyla and 20 genera. 1 genera of the protozoa and rhizopoda, 1 genra of the ciliophora ,15 genera of rotatoria, 2 genera of cladocera has been identified in zooplankton communities. Tubificidae and chironomidae has been identified in all months of the survey. The mean total length of crayfish was 130.5±20.5 mm ( 636) and mean weight was measured as 69.4±34.1 g with maximum and minimum weight of 1.9 and 207.2 g respectively .Total biomass of crayfish in Khandaghloo reservoir estimated as 3.4 tones with a range of 1.1–5.7 tones. But it is recommended not to harvest for at least two year due to high mortality of the populations.The fishes of the reservoir comprised common carp Chinese carp (silver carp, big head and grass carp) (released), Caspian kutum (accidentally released by fishery sector) and some endemic species as Siamahii. The catch of the reservoir fluctuated between 8 to 26 tones during 2000-2010.The fish production of Khandaghloo reservoir ranged from 167 to 324 kg/ha based on different methods that by consideration of 100 ha area of the reservoir, the total production of fish fluctuated between 16.7 to 32.4 tones. The fingerling restocking of Chinese carp in Khandaghloo reservoir with density of 1500 fingerling/ha recommended as 68% of phytoplanktonivorous fish (silver carp) ,12% zooplanktonivorous fish (big head), 6.6% of Crass carp and 10% of benthophagous fish (common carp).
    Keywords: Ecology ; Iran ; Zanjan province ; Mahneshan ; Khandaghloo dam reservoir ; Parichay river ; Phytoplankton ; Zooplankton ; Benthose ; Crayfish Fish ; Trophy ; Fish production potential ; Cyanophyta ; Bacillariophyta ; Green algae ; Chlorophyta ; Euglenophyta ; Pyrrophyta ; Xanthophyta ; Silver Carp ; Grass carp ; Common carp
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 192
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  • 19
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    The study of establishment of rainbow trout culture and hatchery farms on Zayanderood’s River region in Caharmahal and Bakhtiyari Province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25620 | 18721 | 2018-10-14 02:36:27 | 25620 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The aim of this study was to find the best location for establishment of rainbow trout culture and hatcheries farms on Zayanderood’s river region in Charmahal and Bakhtiyari province. This survey carried out over ten station along Zayanderood’s river. The result of physical and chemical analysis showd that the annual average of air temperature varied from 9.5oC - 10oC where the pH annual average value were between 7.5 and 8.8. the dissolve oxygen concentration in stations except in rainbow trout farm effluent were above 10 mg/l. the other chemical , pollutant as well as pesticides levels were under the limiting concentration for rainbow trout culture and Hatcheries activity. The plankton survey showed that the Bacillurophyta were the dominant group of phytoplankton where protozoa constituted the most abundant group of zooplankton the Benthic organisms sensitive to pollutant in particular Epirus were dominant group in all stations. In regard to fishes presence in river, five species of Ciprinidae, one species from Balitoridae and one species from salmonidae families were identified. The capacity for development of rainbow trout culture for tow phase period in Zayanderood’s river region with respect to self purification potential (self purification potential were determined from the oxidation of the effluent of the only active trout farm of the river region), minimum of 10 L/s water requirement for production of trout in concrete canal and pond system and 1 L/S water need for production in semi circular closed system were estimated to be 5202 metric tons.
    Keywords: Aquaculture ; Iran ; Caharmahal and Bakhtiyari province ; Positioning ; Rainbow trout ; Self purification ; Culture ; Hatchery ; Survey ; Temperature ; pH ; Dissolved oxygen ; Pollutant ; Plankton ; Bacillurophyta ; Phytoplankton ; Protozoa ; Zooplankton ; Benthic organisms ; Ciprinidae ; Balitoridae ; Salmonidae
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 68
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  • 20
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    Population structure study of Anzali wetland zooplankton (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25674 | 18721 | 2018-10-08 09:02:13 | 25674 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Anzali wetland is one of the most important places for spawning fishes and zooplankton groups are the first consumer in this ecosystem. They are the perfect food for the larvae of fishes. Zooplankton status was evaluated in 6 stations of different areas of the Anzali wetland during March 2011 to February 2012. Sampling was done by tube (PVC) and passing through of 30 micron planktonic net. The samples were identified and counted by invert microscope. According to the results were identified 60 Genus and 6 phylum (11, 31, 10, 2, 1, 1, 1, 2 genus of phylum Protozoa, Rotatoria, Arthropoda, Gastrotricha, Mollusca, Tardigrada, Nematoda, Porifera, Annelida) respectively. The results showed that the maximum annual average density of zooplankton was observed with 2497 number per liter in Karkan station and the population was more in the summer than in other seasons. Phylum of Rotatoria,, protozoa and superclass Copepoda formed 48, 45 and 6percent of the density respectively. According to the results the population of zooplankton did not change much compared to past studies, excluding Protozoa but the diversity of all zooplankton group are declined very much. According to the statistical analysis Kruskal Wallis are not significant differences between density of zooplankton in different stations, months and seasons (p 〉 0.05), but significant differences were found in different phylum together (p〈0.05).
    Keywords: Ecology ; Iran ; Anzali wetland ; Zooplankton ; Density ; Diversity
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 48
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