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  • Chironomidae  (11)
  • Scytaelina n. gen
Collection
Keywords
Years
  • 1
    Publication Date: 2021-05-19
    Description: The Caspian Sea with brackish water is known as typical environment due to geo position, precious biota and the largest land-enclosed drainage area in the world. Macrobenthos were performed the main group of the Caspian Sea fauna. While they use as environmental bio-assessment, they have not completely studied in the Caspian Sea especially in estuaries environments. In this survey were studied eighteen river estuaries in Guilan province off Caspian sea southwest including Asrara, Chelevand, Lemir, Havigh, Shirabad, Khotbesara, Lisar, Karganroud, Navroud, Nokandekeh, Sefidrud, Heshmatrud, Langerud, Polerud and Chabokrud. The macro-invertebrate sampling was conducted seasonally at eight stations during autumn 2008 to autumn 2009. The macrobenthos organisms were identified as possible level in genus or species. The Shannon Wiener diversity and the Hilsenhoff biotic indices were used for evaluation of environmental quality. In this study, 69 genus identified that belong to 36 families and 16 orders. The most presentation of genus belongs to Chironomidae family with twenty six genus while others families were included forty three genus. The most average of macro-invertebrate abundance belong to order of Diptera with 35 %, subsequently the abundance of Amphipoda and Bivalvia orders occupied the second rank with 8.2 %. Orders Polychaeta, Oligochaeta and Cumacea had a low abundance during the study, however the Polychaeta showed a high abundance in some seasons and stations (up to 25%). The Plecoptera was rarely observed in some stations with high abundance. The Stenogammarus genus had the normally distribution during study, while Chironomidae genera as Eukifferiella and Cricotopus were measured in the high abundance during autumn 2008 to spring 2009. While Streblospio and Limnodrilus had the high presentation during winter and spring 2009, Cerastoderma sp. showed a high percentage in spring and summer 2009. The result of Shannon Wiener index values showed a significantly difference among regions for most seasons. There was also observed significantly difference for diversity values among stations in different seasons. According to Hilsenhoff biotic index for water quality classification; the most stations had good quality in spring 2009, while they were slightly and moderately good condition in winter 2009. The water quality of the Caspian Sea stations was in good condition as compared with the rivers estuary stations.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: River estuary ; Macrobenthos ; Diversity ; Bio-assessment ; Brackish Water ; Environmental quality ; Cricotopus ; Eukifferiella ; Chironomidae
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 85pp.
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  • 2
    Publication Date: 2021-05-19
    Description: Inland water aquaculture activity have been known as an important approach for protein production while reservoir lakes recognized to have a significant potential for this purpose. Zanjan province in Iran with several dam reservoirs is suitable for aquaculture development. This study was conducted on biotic and abiotic factors of two lakes Shovir and Mirzakhanlo in order to determine aquaculture potentially of reservoirs. This two lakes located on different climatic region; Shovir located in region of semi arid area with very cold weather in winter, while Mirzakhanlo is in semi humid area and warm weather characteristic. In this study the plankton, benthos and fishes were assessed and the 15 hydrochemical factors were measured in order to determine the fisheries potential for fish introduction or release. The results showed that the phytoplankton abundance of Mirzakhanlo varied between 1.6 to 45.2 million cell/l. with 32 identified genus. The zooplankton abundance varied between 48 to 632 n/l. and 22 identified genus. The abundance plankton in shovir varied between 1.350 to 34.2 million cell/l. and 240 to 4500 n/l. for phyto and zooplankton respectively. Macrobenthos biomass were 21.4 and 0.34 g/m2 in Shovir and Mirzakhanlo lakes respectively while Chironomidae and Tubificidae families were dominant groups. The lake sediment organic matter were 4.3 and 3.2 % respectively. In ichtiology survey identified 5 and 7 species in Mirzakhanlo and Shovir lakes respectively. The hydro-chemical results indicated no restriction for aquaculture activity and according to trophic model both lakes are recognized as meso-eutrophic and eutrophic. Despite of climatic restrictions, the potential for fish production was estimated about 321 and 151 kg/ha for Shovir and Mirzakhanlo lakes respectively that can be improved by using agricultural and the other native facilities.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Aquaculture ; Plankton ; Benthose ; Hydrochemical ; Phytoplankton ; Chironomidae ; Tubificidae ; Survey ; Meso-eutrophic ; Eutrophic
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 76pp.
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  • 3
    Publication Date: 2021-05-19
    Description: The study was conducted in Anzali Lagoon (37 ̊ 28 N , 45 ̊ 25 E) in 38 stations during April 1994 to March 1996. In this study 13 biogroups were separated and counted. The abundance of most biogroups was very low, while that of the groups Chironomidae and Tubificidae were high and the abundance of the biogroup Amphipoda, Culicidae and Ephemeroptera was lower than the mentioned groups. Tubificidae was seen in all stations and all months of the year and its maximum density was 3740 organisms in each square meter. After Tubificidae the Chironomidae family had the second level of density. The total percentage of the organic substances of the bottom had not considerable changes in different month and its mean amount differed from 2.57% in the site of breakwater and the sea to 27.1% (maximum) in central portion of the lagoon. No considerable relation was observed between the amount of organic matter and the abundance of benthos in the region. According to the obtained results, Tubificidae and Chironomidae families showed little correlation with the bottom organic substances. The correlation of biogroup Ephemeroptera with the organic substances was greater than that of the 2 mentioned groups. Using the cluster type analysis and dendrograms made clear that the relation of biogroups Culicidae, Ephemeroptera and Tubificidae with the bottom organic substances was more than that of Chironomidae. Culicidae and Chironomidae showed close correlation with silt and clay of the bottom, but Tubificidae was more adaptable with the bottom fine particles.
    Description: Published
    Keywords: Zoobenthic ; Invertebrate ; Organic ; Biogroups ; Chironomidae ; Tubificidae ; Amphipoda ; Culicidae ; Ephemeroptera ; Density ; Organisms ; Benthos ; Substances ; Cluster ; Dendrograms ; Clay ; Adaptable
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.83-102
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  • 4
    Publication Date: 2021-05-19
    Description: The Sampling of macrobenthic communities in southeastern Caspian Sea, Iranian coast, were investigated seasonally from April to March 2012. Sampling was carried out at 8 transect as named Astara, Badar Anzali , Sefied rood , Tonekaboon , Nooshahr , Babolsar, Amirabad, Gomishan.In each transect were choice 8 stations at 5m, 10m, 20m, 50m, 100m depths respectively. Samples were taken in triplet with a 0.1m² van Veen grab.Totally 28 macrofaunal species belonging to 10 families were identified as gamaridae (9species), corophidae (3species),psudocumidae(8 species), amphartidae (2species), balanidae, chironomidae, cardidae scorbicolaridae, nereidae, sponoidae, each one species. Polychaetes were dominated, representing 72.5% of the whole fauna while while (equal 62.4% of total abundance and 5/1%biomass) were belong to Streblospio spp. from Spionidae family. Cerastoderma lamarcki belong to bivavia consist of 2/3% total macobethos abundance and 73% biomass. Total abundance of macrobenthos of middle area were higher than east and west area in southern Caspian Sea. Average benthic population density (no/m2) with (SE) was 4581(444 ). The benthic biomass (mg/m2) with an overall mean of 12. 125(02). Spatial and temporal variations of benthos. In the present study showed, maximum abundance Macrobenthos 17855(5543) no/m2 )were recorded in 20 meter depths at Nooshahr trancect , while minimum 841(109 )in 10 meter depths at Amirabad trancect p〈0.05. Maximum biomass 135.10(126) g/m2 were obtained at 10m depths in Astara minimum 0.51(0.4) ) g/m2 at 5m depths in Nooshahr transect . maximum were obtained in winter and minimum in summer Number of species varied 3 to 18 , Generally, minimum species diversity were obtained at 20 m depth in Tonekabon transects and the maximum value was observed at 100 m depth of sefeidrood variations physicochemical factors were between salinity 12.5to12.9ppt ,temperature 8-19˚c and PH 8.1 dissolve oxygen 69-101mg/li. Total secondary production calculated, according ,104/996g AFDW/m2/yr.Maximum were recorded in 10meter depth (30/381AFDW/m2/yr) and minimum at 50 meter depth(11/007g AFDW/m2/yr) respectively. Average total organic matter were 3/18 percent in sample periods. Percent of total organic matter (TOM) were low in 5 and 10 m depths and increased toward offshore depths. TOM percent was 1/67(0.11 )at 5 m depth and increased to 4/38(0.13 )in 100 m depth. Average total silt &clay were 68/63(2.97) percent in sample periods. Positive significant relation was between silt &clay and total organic matter. Macrobenthos community reduce in high silt clay and high sandy contents. Due to increase of streptolosbio.spp , monitoring program for understanding effect of this organism on ecosystem and on fish feeding is necessary.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physicochemical ; Macrobenthos ; Diversity ; Distribution ; Abundance ; Biomass ; Secondary production ; Species ; Gamaridae ; Corophidae ; Psudocumidae ; Amphartidae ; Balanidae ; Chironomidae ; Cardidae ; Scorbicolaridae ; Nereidae ; Sponoidae ; Salinity ; Temperature ; Streptolosbio.spp
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 70pp.
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  • 5
    Publication Date: 2021-05-19
    Description: During the year 1998 1999 Mako and Mabhabad reservoirs were surveyed by Fisheries Research Center of Guilan province Mahabad Resevoir located at 36 47 N ( Lat ) and 45 , 43 E ( Long ) in western It has an average area of 700 hectares and is mesotroph- that Azarbiajan province chracterized by depletion of oxygen in the bottom during warm months In phytoplankton , Chrysophyta and in zooplankton Rotifera were dominance . There is low diversity of benthic animals in this reservoir and Oligocheata and Chironomidae are two benthic forms that comprise the most populations The fishes of this water body can be categorized in two groups : endemic and exotic . Ichthyofauna of the reservoir and its catchment area comprise 9 endemic species and subspecies and 9 exotic species and subspecies that located in 4 family , Cyprinidae , Balitoridea Siluridea and Poeciiiidae In the reservoir and its inlets and outlets , Cyprinidae is salient component of the ichthyofauna by a figure of 83.3 % . The fishes of this reservoir are ail kind of food zooplanktoniphagous level consumers such as phytoplanktoniphagous benthophagous and picsivorous Parasitic diseases are highly incident among the fishes of this water body and it can be said that fishes of the reservoir are widely infected by the parasitic diseases . The most important waterfowls and seashore birds are that migrate to the reservoir for wintering . The most commercially endemic fish species are Sia mahi ( Capoeta capoeta ) dace ( Leuciscus cepha/us ) and catfish ( Si/urus g/anis ) and commercially exotic species are common carp ( Cyprinus carpio ) Silver carp ( Hypophtha/michthys molitrix ) and Big head (Hypophtha/michthys The annual catch of endemic and exotic species in 1998 were 124 and nobi/is ) Stock estimation showed over exploitation and 111.9 tonnes respectively underexploitation for exotic ( big head and silver carp ) and endemic ( dace and sia mahi ) fish species respectively . Estimation revealed that this reservoir annually can produce 14323 tonnes of silver carp big head and common carp and for achiveing this figuer anoually 394000 fingerlings of mentioned species should be released in this Mako reservoir which is situatd on Zang Mar river was built in 1995 It is 12 Km to Mako city with the geographical identification of 39 11 N ( Lat ) and 49 29 E ( Long ) It is a earth kind reservoir that has a maximum depth of 77 m . The length of the barrier is 210 m and the upper and lower wide of the barrier are 10 and 350 m respectively Three river entred to the reservoir are Ghezet Chay , Emam Gholi and Dibak .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Oligocheata ; Chironomidae ; Ichthyofauna ; Cyprinidae ; Zooplankton ; Phytoplankton ; Capoeta capoeta
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 159pp.
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  • 6
    Publication Date: 2021-05-19
    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/m2 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.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Macroinvertebrates ; Eutrification ; Aquatic ; Tubificidae ; Chironomidae ; Insecta ; Diptera ; Annelida ; Oligochaeta ; Benthic fauna
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 48pp.
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  • 7
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    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
    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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  • 8
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    Unknown
    In:  http://aquaticcommons.org/id/eprint/23961 | 18721 | 2018-08-02 11:18:37 | 23961 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-15
    Description: The study was conducted in Anzali Lagoon (37 ̊ 28 N, 45 ̊ 25 E) in 38 stations during April 1994 to March 1996. In this study 13 biogroups were separated and counted. The abundance of most biogroups was very low, while that of the groups Chironomidae and Tubificidae were high and the abundance of the biogroup Amphipoda, Culicidae and Ephemeroptera was lower than the mentioned groups. Tubificidae was seen in all stations and all months of the year and its maximum density was 3740 organisms in each square meter. After Tubificidae the Chironomidae family had the second level of density. The total percentage of the organic substances of the bottom had not considerable changes in different month and its mean amount differed from 2.57% in the site of breakwater and the sea to 27.1% (maximum) in central portion of the lagoon. No considerable relation was observed between the amount of organic matter and the abundance of benthos in the region. According to the obtained results, Tubificidae and Chironomidae families showed little correlation with the bottom organic substances. The correlation of biogroup Ephemeroptera with the organic substances was greater than that of the 2 mentioned groups. Using the cluster type analysis and dendrograms made clear that the relation of biogroups Culicidae, Ephemeroptera and Tubificidae with the bottom organic substances was more than that of Chironomidae. Culicidae and Chironomidae showed close correlation with silt and clay of the bottom, but Tubificidae was more adaptable with the bottom fine particles.
    Keywords: Biology ; Ecology ; Zoobenthic ; Invertebrate ; Organic ; Biogroups ; Chironomidae ; Tubificidae ; Amphipoda ; Culicidae ; Ephemeroptera ; Density ; Organisms ; Benthos ; Substances ; Cluster ; Dendrograms ; Clay ; Adaptable ; Anzali Lagoon ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 83-102
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  • 9
    Publication Date: 2021-07-16
    Description: The Sampling of macrobenthic communities in southeastern Caspian Sea, Iranian coast, were investigated seasonally from April to March 2012. Sampling was carried out at 8 transect as named Astara, Badar Anzali, Sefied rood, Tonekaboon, Nooshahr, Babolsar, Amirabad, Gomishan.In each transect were choice 8 stations at 5m, 10m, 20m, 50m, 100m depths respectively. Samples were taken in triplet with a 0.1m^² van Veen grab.Totally 28 macrofaunal species belonging to 10 families were identified as gamaridae (9species), corophidae (3species),psudocumidae(8 species), amphartidae (2species), balanidae, chironomidae, cardidae scorbicolaridae, nereidae, sponoidae, each one species. Polychaetes were dominated, representing 72.5% of the whole fauna while while (equal 62.4% of total abundance and 5/1%biomass) were belong to Streblospio spp. from Spionidae family. Cerastoderma lamarcki belong to bivavia consist of 2/3% total macobethos abundance and 73% biomass. Total abundance of macrobenthos of middle area were higher than east and west area in southern Caspian Sea. Average benthic population density (no/m^2) with (SE) was 4581(444 ). The benthic biomass (mg/m^2) with an overall mean of 12. 125(02). Spatial and temporal variations of benthos. In the present study showed, maximum abundance Macrobenthos 17855(5543) no/m^2) were recorded in 20 meter depths at Nooshahr trancect , while minimum 841(109 )in 10 meter depths at Amirabad trancect p〈0.05. Maximum biomass 135.10(126) g/m^2 were obtained at 10m depths in Astara minimum 0.51(0.4) ) g/m^2 at 5m depths in Nooshahr transect . maximum were obtained in winter and minimum in summer Number of species varied 3 to 18 , Generally, minimum species diversity were obtained at 20 m depth in Tonekabon transects and the maximum value was observed at 100 m depth of sefeidrood variations physicochemical factors were between salinity 12.5to12.9ppt ,temperature 8-19˚c and PH 8.1 dissolve oxygen 69-101mg/li. Total secondary production calculated, according ,104/996g AFDW/m^2/yr.Maximum were recorded in 10meter depth (30/381AFDW/m^2/yr) and minimum at 50 meter depth(11/007g AFDW/m^2/yr) respectively. Average total organic matter were 3/18 percent in sample periods. Percent of total organic matter (TOM) were low in 5 and 10 m depths and increased toward offshore depths. TOM percent was 1/67(0.11 ) at 5 m depth and increased to 4/38(0.13 )in 100 m depth. Average total silt &clay were 68/63(2.97) percent in sample periods. Positive significant relation was between silt &clay and total organic matter. Macrobenthos community reduce in high silt clay and high sandy contents. Due to increase of streptolosbio.spp, monitoring program for understanding effect of this organism on ecosystem and on fish feeding is necessary.
    Keywords: Ecology ; Iran ; Caspian Sea ; Astara ; Badar Anzali ; Tonekabon ; Macrobenthos ; Diversity ; Distribution ; Abundance ; Biomass ; Secondary production ; Species ; Gamaridae ; Corophidae ; Psudocumidae ; Amphartidae ; Balanidae ; Chironomidae ; Cardidae ; Scorbicolaridae ; Nereidae ; Sponoidae ; Salinity ; Temperature ; Streptolosbio.spp
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 70
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  • 10
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    Unknown
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25658 | 18721 | 2018-10-08 08:27:39 | 25658 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-16
    Description: Inland water aquaculture activity have been known as an important approach for protein production while reservoir lakes recognized to have a significant potential for this purpose. Zanjan province in Iran with several dam reservoirs is suitable for aquaculture development. This study was conducted on biotic and abiotic factors of two lakes Shovir and Mirzakhanlo in order to determine aquaculture potentially of reservoirs. This two lakes located on different climatic region; Shovir located in region of semi arid area with very cold weather in winter, while Mirzakhanlo is in semi humid area and warm weather characteristic. In this study the plankton, benthos and fishes were assessed and the 15 hydrochemical factors were measured in order to determine the fisheries potential for fish introduction or release. The results showed that the phytoplankton abundance of Mirzakhanlo varied between 1.6 to 45.2 million cell/l. with 32 identified genus. The zooplankton abundance varied between 48 to 632 n/l. and 22 identified genus. The abundance plankton in shovir varied between 1.350 to 34.2 million cell/l. and 240 to 4500 n/l. for phyto and zooplankton respectively. Macrobenthos biomass were 21.4 and 0.34 g/m^2 in Shovir and Mirzakhanlo lakes respectively while Chironomidae and Tubificidae families were dominant groups. The lake sediment organic matter were 4.3 and 3.2 % respectively. In ichtiology survey identified 5 and 7 species in Mirzakhanlo and Shovir lakes respectively. The hydro-chemical results indicated no restriction for aquaculture activity and according to trophic model both lakes are recognized as meso-eutrophic and eutrophic. Despite of climatic restrictions, the potential for fish production was estimated about 321 and 151 kg/ha for Shovir and Mirzakhanlo lakes respectively that can be improved by using agricultural and the other native facilities.
    Keywords: Aquaculture ; Iran ; Zanjan province ; Shovier dam reservoir ; Mirzakhanlo dam reservoir ; Aquaculture ; Plankton ; Benthose ; Hydrochemical ; Phytoplankton ; Chironomidae ; Tubificidae ; Survey ; Meso-eutrophic ; Eutrophic
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 76
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