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  • Ecology  (13)
  • Chlorophyta  (6)
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  • 1
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    Abundance and distribution pattern of plankton in Anzali Lagoon (2018)
    Details
    Publication Date: 2021-05-19
    Description: A comprehensive hydrobiological and hydrological investigation conducted in Anzali lagoon from 1997 to 2000. During this study, a total of 5 phylum and 62 genera of phytoplanktons and 10 phylum and 50 genera of zooplankton were identified. The results showed that for phytoplanktons the abundance of Cyanophyta, Chrysophyta, Chlorophyta, Euglenophyta and Pyrrophyta were calculated 61.8%, 29.1%, 8.2% 0.7% and 0.2%, respectively. The most abundance of zooplankton belongs to Rotatoria (60.8%), after that other group of zooplankton had more abundance consist of Copepoda and its nauplii (17.2%), Ciliophora (9.6%) and Rhizopoda (6.6%). Other zooplanktons had very few abundance. According to obtained results, western region of lagoon (Abkenar) is a rich region of planktons in which the most dominant phylum of phytoplanktons was from Cyanophyta with genera of Oscillatoria, Anabaenopsis, Microcystis. The most abundance of zooplanktons were genera of Polyarthra, Brachionus and Keratella and from Arthropoda phylum, the most abundance genus was found Cyclops and its nauplii. The Planktonic study indicated that Anzali lagoon is one of the richest lagoon in Iran with high production and potential water for feeding of fishes and their larva.
    Description: Published
    Keywords: Hydrobiological ; Hydrological ; Planktons ; Phytoplankton ; Zooplankton ; Phylum ; Genera ; Cyanophyta ; Chrysophyta ; Chlorophyta ; Euglenophyta ; Pyrrophyta ; Abundance ; Distribution
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.87-114
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  • 2
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    Phytoplankton population structure of the Anzali wetland (2010 and 2011) (2017)
    Details
    Publication Date: 2021-05-19
    Description: Phytoplankton groups are very important producers in the Anzali wetland having a significant role in the quality and need to be constantly studied in term of their sequence and density. This survey was conducted at 6 stations between March 2011 and February 2012. According to the results, 67 different genera (22 Bacillariophyta, 26 Chlorophyta, 9 Cyanobacteria, 5 Cryptophyta, 1 Euglenophyta, 2 Chrysophyta, 1Dinoflgellata and 1 Xanthophyta) were identified .Most observed in Sorkhankol and Karkan stations with the annual average of 24.4±5.6 and 20.4± 5.4 cells/ liter respectively. The Bacillariophyta particularly Cyclotella was dominant in all of the stations, but high abundance of Cyanobacteria in Karkan station from July to mid-Octobercaused the annual average of this phylum to be more than Bacillariophyta. The highest and lowest phytoplankton abundances were observed in September and December, respectively.The number of phytoplankton genera and diversity in this study were less than previous studies.
    Description: Published
    Keywords: Bacillariophyta ; Chlorophyta ; Cyanobacteria ; Euglenophyta ; Cyclotella ; Phytoplankton ; Diversity ; Abundance ; Population ; Structure
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.105-118
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  • 3
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    Limnological study of Taham lake in Zanjan province in order to assess aquaculture possibility (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The Taham dam reservoir has been established in order to provide drinking water of Zanjan population as far as 15 km in a mountain region at 1900 meter altitude with a 317 ha surface area. This study was conducted on biotic and a biotic factors in order to recognize of aquaculture possibility within drinking considerations. The results showed the less abundance of phytoplankton with 2 million/l. where abundant of zooplankton was 266 /l. Bacillariophyta and Chlorophyta belong to phytoplankton and Rotatoria belong to zooplankton were dominated among identified plankton phylum. There were identified 45 and 32 genus of phytoplankton and zooplankton respectively. There were identified 5 groups of benthos that Tubificidae, Hirudina had the most frequency, and the biomass of benthos was varied from 1.1 to 23.7 g /m2. The ichtiology survey showed presence of 6 species in the lake that Alburnoides bipunctatus, Capoeta capoeta, , Leuciscus cephalus were the most abundance in the catch. L. cephalus was recorded with the maximum size of 870 g while the most frequent weight class was 150 450 g for C. capoeta,, L. cephalus . Diet survey showed the adequate feeding of fishes in lake also the observation of leech in trout guts was very considerable. The reproduction study displayed that a partial of matured fishes were succeed in breeding. Leuciscus cephalus have been known as a typical species with commercial size and high abundance which will be needed a fisheries management in Taham Lake to sustainable exploitation. The hidrochemical results indicated low nutrients values while total nitrogen was varied from 0.32 to 0.61 mg/l. and the Chl-a was varied from 7.9 to 25.9 μg/l.. The oxygen amount was 4.5 to 8.4 mg/l even in 65 meter depths. Total hardness average was about 149 mg/l where the Ca and Mn were measured in a low values. Trophic model in Taham lake showed the early stage of mesotrophy while other lakes and wetlands in north of Iran had been progressed in mesotrophic level.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Hidrochemical ; Limnological ; Aquaculture ; Population ; Biotic ; Phytoplankton ; Zooplankton ; l. Bacillariophyta ; Chlorophyta ; Rotatoria ; Phylum ; Biomass ; Alburnoides bipunctatus ; Capoeta capoeta ; C. capoeta ; L. cephalus
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 81pp.
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  • 4
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    Investigation of Mnemiopsis leidyi feeding from the Caspian Sea zooplanktons (2021)
    In:  http://aquaticcommons.org/id/eprint/23729 | 18721 | 2018-07-20 18:23:20 | 23729 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Mnemiopsis leidyi was sampled from December 2003 to March 2005 in 11 stations located along four regions Anzali, Khazarabad, Tourkman and Gorgan Bay using METU net in the Iranian coasts of the Caspian Sea. Study of stomach contents of M. leidyi showed that Acartia sp. belonging to Copepoda and Lamellibranchia sp. had the highest frequency comprising 66% and 13% of food items taken by the organism respectively and the least food items taken were Balanus nauplii, Rotatoria, Tintinnopsis and Podon polyphemoides. The maximum mean abundance of food item was Acartia sp. which was shown to be present in stomach content of M. leidyi caught in different depths, seasons and regions in the Iranian coasts of the Caspian Sea. For the M. leidyi larvae, the highest amount of food item was Acartia sp. and Lamellibranchia sp. with an average of 44% and 32% and the maximum abundance of food item for juvenile and mature M. leidyi was also Acartia sp. with an average of 67.5% and 66%. The results showed that the main food item for M. leidyi is Acartia sp. of the Copepoda. Hence, M. leidyi feeding has an important effect in declining zooplankton populations.
    Keywords: Biology ; Ecology ; Feeding behaviour ; Marine crustaceans ; Plankton surveys ; Food organisms ; Stomach content ; Food ; Zooplankton ; Natural populations ; Balanus ; Podon polyphemoides ; Mnemiopsis leidyi ; Tintinnopsis ; Metus ; Lamellibranchia ; Acartia ; Brackish ; Gorgan Bay ; Caspian Sea Eurasia ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 35-46
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  • 5
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    The density and distribution of plankton in Hevigh River, Guilan Province (2021)
    In:  http://aquaticcommons.org/id/eprint/24728 | 18721 | 2018-08-04 16:32:05 | 24728 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: A Comprehensive hydrobiological and hydrological investigation was conducted on Hevigh River, west of Guilan Province from 2001 to 2002. Totally, 4 Phyla of phytoplanktons including 21 genera were observed. The maximum phytoplankton density belonged to the Phylum Chrysophyta with genera, Nitzchia, Diatoma, Cocconeis, Navicula and Cymbella comprising 95.7% of the phytoplankton population throughout the year. Chlorophyta ranked second with genera Scenedesmus, Cruciginia and Anicistrodesmus, comprising 2.20% of the population during the year. Cyanophyta with Oscillatoria and Euglenophyta with Euglena consisted the remaining few percents of the phytoplankton population. Zooplankton population in Hevigh River was found to be very poor, and mostly belonged to Protozoa and Rotatoria. However, 4 Phyla and 12 genera of zooplanktons were distinguished in the River the highest density of which belonged to Protozoa with genera Amelia, Difflugia, Cyphoderia and Euglypha, comprising 64% of the total population. Rotatoria with genera Keratella, Cephalodella, Lecane and Rotaria, consisted 14% of the zooplankton population during the year. Arthropoda, Nematoda, Tardigrada were very low in numbers.
    Keywords: Ecology ; Hevigh River ; Phytoplanktons ; Zooplanktons ; Guilan Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 75-86
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  • 6
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    Limnological study of Taham Lake in Zanjan Province in order to assess aquaculture possibility (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25273 | 18721 | 2018-09-07 08:29:11 | 25273 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The Taham dam reservoir has been established in order to provide drinking water of Zanjan population as far as 15 km in a mountain region at 1900 meter altitude with a 317 ha surface area. This study was conducted on biotic and a biotic factors in order to recognize of aquaculture possibility within drinking considerations. The results showed the less abundance of phytoplankton with 2 million/l. where abundant of zooplankton was 266 /l. Bacillariophyta and Chlorophyta belong to phytoplankton and Rotatoria belong to zooplankton were dominated among identified plankton phylum. There were identified 45 and 32 genus of phytoplankton and zooplankton respectively. There were identified 5 groups of benthos that Tubificidae, Hirudina had the most frequency, and the biomass of benthos was varied from 1.1 to 23.7 g /m^2. The ichtiology survey showed presence of 6 species in the lake that Alburnoides bipunctatus, Capoeta capoeta, Leuciscus cephalus were the most abundance in the catch. L. cephalus was recorded with the maximum size of 870 g while the most frequent weight class was 150 450 g for C. capoeta,, L. cephalus . Diet survey showed the adequate feeding of fishes in lake also the observation of leech in trout guts was very considerable. The reproduction study displayed that a partial of matured fishes were succeed in breeding. Leuciscus cephalus have been known as a typical species with commercial size and high abundance which will be needed a fisheries management in Taham Lake to sustainable exploitation. The hidrochemical results indicated low nutrients values while total nitrogen was varied from 0.32 to 0.61 mg/l. and the Chl-a was varied from 7.9 to 25.9 μg/l. The oxygen amount was 4.5 to 8.4 mg/l even in 65 meter depths. Total hardness average was about 149 mg/l where the Ca and Mn were measured in a low values. Trophic model in Taham lake showed the early stage of mesotrophy while other lakes and wetlands in north of Iran had been progressed in mesotrophic level.
    Keywords: Limnology ; Iran ; Zanjan province ; Taham lake ; Limnological ; Aquaculture ; Population ; Biotic ; Phytoplankton ; Zooplankton ; l. Bacillariophyta ; Chlorophyta ; Rotatoria ; Phylum ; Biomass ; Alburnoides bipunctatus ; Capoeta capoeta ; C. capoeta ; L. cephalus
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 81
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  • 7
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    Ecological study on the Persian Gulf Martyres Lake, Tehran (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25818 | 18721 | 2018-10-13 10:23:49 | 25818 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The ecological study of the Persian Gulf Martyres Lake carried out at the 5 stations between 2013 and 2014. This study identified 35 phytoplankton taxa. The diatoms taxa was dominated and their abundance recorded highest (2000 000 cell. L^-1) in the lake. The annual phytoplankton abundance was measured as 2500 000 cell. L^-1 during the study. The total nitrogen and water temperature were the significant a biotic parameters to increase cyanophytes abundance. Furthermore, 37 zooplankton taxa were identified. The Rotatoria abundance was dominated zooplankton. The annual zooplankton abundance was measured as 72 ind.l-1. Based on the CCA, there was no correlation between Rotatoria abundance and a biotic parameters. The study benthos showed Ephemeroptera and Diptera abundance were dominated; artificial bottom and lack of sediment and organic matters were the main reasons in decreasing of the benthos density. The Chitgar lake is the poorest lake in Iran due to low density of plankton and benthos organisms. The estimation of fish production was 123 kg/ha and for the lake was determaind 16 tonne. The finding display, invasive species was the main fish Chitgar lake that would be negative effect and increase eutriphication trend in the lake. Phosphorus parameter was limited parameters and trophy level recorded low due to high N/P ration in the lake. In overall the Chitgar lake situation is in Oligotrophic category with the low trophy level.
    Keywords: Ecology ; Iran ; Persian Gulf ; Chitgar Lake ; Phytoplankton ; Zooplankton ; Benthose ; Trophy ; Abundance ; Nitrogen ; Temperature
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 92
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  • 8
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    Phytoplankton population structure of the Anzali wetland (2010 and 2011) (2021)
    In:  http://aquaticcommons.org/id/eprint/22102 | 18721 | 2018-02-08 03:16:16 | 22102 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-06-26
    Description: Phytoplankton groups are very important producers in the Anzali wetland having a significant role in the quality and need to be constantly studied in term of their sequence and density. This survey was conducted at 6 stations between March 2011 and February 2012. According to the results, 67 different genera (22 Bacillariophyta, 26 Chlorophyta, 9 Cyanobacteria, 5 Cryptophyta, 1 Euglenophyta, 2 Chrysophyta, 1Dinoflgellata and 1 Xanthophyta) were identified. Most observed in Sorkhankol and Karkan stations with the annual average of 24.4±5.6 and 20.4± 5.4 cells/ liter respectively. The Bacillariophyta particularly Cyclotella was dominant in all of the stations, but high abundance of Cyanobacteria in Karkan station from July to mid-October caused the annual average of this phylum to be more than Bacillariophyta. The highest and lowest phytoplankton abundances were observed in September and December, respectively. The number of phytoplankton genera and diversity in this study were less than previous studies.
    Keywords: Biology ; Ecology ; Fisheries ; Phytoplankton ; Diversity ; Abundance ; Anzali Wetland ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 105-118
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  • 9
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    Abundance and distribution pattern of plankton in Anzali Lagoon (2021)
    In:  http://aquaticcommons.org/id/eprint/24138 | 18721 | 2018-08-03 08:10:26 | 24138 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: A comprehensive hydrobiological and hydrological investigation conducted in Anzali lagoon from 1997 to 2000. During this study, a total of 5 phylum and 62 genera of phytoplanktons and 10 phylum and 50 genera of zooplankton were identified. The results showed that for phytoplanktons the abundance of Cyanophyta, Chrysophyta, Chlorophyta, Euglenophyta and Pyrrophyta were calculated 61.8%, 29.1%, 8.2% 0.7% and 0.2%, respectively. The most abundance of zooplankton belongs to Rotatoria (60.8%), after that other group of zooplankton had more abundance consist of Copepoda and its nauplii (17.2%), Ciliophora (9.6%) and Rhizopoda (6.6%). Other zooplanktons had very few abundance. According to obtained results, western region of lagoon (Abkenar) is a rich region of planktons in which the most dominant phylum of phytoplanktons was from Cyanophyta with genera of Oscillatoria, Anabaenopsis, Microcystis. The most abundance of zooplanktons were genera of Polyarthra, Brachionus and Keratella and from Arthropoda phylum, the most abundance genus was found Cyclops and its nauplii. The Planktonic study indicated that Anzali lagoon is one of the richest lagoon in Iran with high production and potential water for feeding of fishes and their larva.
    Keywords: Biology ; Ecology ; Phytoplankton ; Zooplankton ; Anzali Lagoon ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 87-114
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  • 10
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    The density and distribution of the plankton, in Maco Reservoir Dam (2021)
    In:  http://aquaticcommons.org/id/eprint/24771 | 18721 | 2018-08-05 16:26:26 | 24771 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: A comprehensive hydrobiological and hydrological investigation conducted in Maco Reservoir dam during 1997-1998.The result showed that the maximum density of Phytoplankton belongs to the Phylum of Chrysophyta with species of Cyclotella menenghiniana, Synedra ulna and Diatoma vulgare. This Phylum observed mostly in summer and showed the most; frequency (%76) population during year. After Chrysophyta there was Chlorophyta phylum with species Scenedesmus bijuga and S. bijugatus with %19 frequency during year. Also, there were other phytoplankton phyla, namely: Cyanophyta with Oscillatoria limosa, Euglenophyta with Euglena sp. and Pyrrophyta with Ceratium hirdinella that had a few percent of population in the year. The highest density of Zooplankton belongs to the phylum of Rotatoria with species of Synchaeta oblonga, Polyarthera vulgaris and P. dolichoptera. This Phylum was observed mostly during autumn and had %74 frequency during year. The second phylum belongs to Arthropoda, that was included two orders consist of: Copepoda (%16 population) with speices of Cyclops vicinus and C.viridis and their naupli, order Cladocera (%7 population) with speice of Daphnia longespina. They were recognized as the most important zooplankton in Maco reservoir dam. The planktonic studies and observations show that there is a well enough potential of food for feeding of fishes inhabited in this dam.
    Keywords: Ecology ; Maco Reservoir dam ; Phytoplankton ; Zooplankton ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 29-46
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