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  • 1
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    Macroinvertebrate study of Caspian Sea river estuaries in Guilan province (2017)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: Macrobenthos were performed the main group of the Caspian Sea funa while they have not completely attentived espacilly in estuaries environoments. In this survey were studied eghiteen river estuaries in Guilan province off Caspian Sea southwest. The macroinvertebrate sampling was conducted seasonally at egith station during winter 2009 to summer 2009. The macrobenthos organisms were sorted and identified as possible level in genus or species. The results presented fifteen orders including thirty six families. The most presentation of genus belongs to Chironomidae family with twenty six genus while others were included forthy three genus. The Stenogammarus genus had the normally distribution between seasons while the most abundance was linked to Eukifferiella and Cricotopus during winter and spring 2009 nearly same as Streblospio and Limnodrilus. The Cerastoderma was showed a high percentage with decresing of others especially during summer 2009. In this paper have been described the fluctuation of benthic aboundance according to biological characteristic and the environoment degradation.
    Beschreibung: Published
    Schlagwort(e): Macroinvertebrate ; River estuary ; Macrobenthos ; Identification ; Abundance
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp.1-12
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 2
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    Studying native fishes in Hamadan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: Studying native fishes of Hamadan province have been done in 159 stations from 51 important water resources (wetland, reservoir, spring, river and qanat) using with electric tool, cast-net, seine and gill-net gears from July 2010 to Oct. 2011 and the main aims were species identifying and determining their distribution and abundance in the studied area. In the study, 33411 fish specimens are caught in 257 times of sampling and selected randomly about 8500 individual and laboratory works showed the fish belong to 37 species from 7 families. Cyprinidae with 25, Nemacheilidae with 6 and Sisoridae with 2 species had the most diversity and Cobitidae, Poeciliidae, Salmonidae and Mastacembelidae had only a representative. 31 fish species were native or endemic and 6 species were alien. Fish species existed in all rivers of Ghezelozan and Sirvan sub-basins but there were not any fish in 10 rivers of Ghara-Chai sub-basin and in 6 rivers of Gamasiab sub-basin, too. Also, it was observe 1-3 fish species in 15 rivers, 4-6 fish species in 10 rivers, 7-10 fish species in 5 rivers and more than 10 fish species in 4 main water resources and Gamasiab sub-basin with 32 fish species was the most diversified and Ghezelozan sub-basin with 2 fish species was the least diversified. There were any species to 4 (mostly 1 or 2) fish species in studied qanats in Ghara-Chai and Gamasiab rivers sub-basins. 23 fish species existed in a subbasin, 12 species in 2 sub-basin, Capoeta capoeta in 3 sub-basin and Squalius cephalus in all sub-basins of studied area. Alburnoides nicolausi,Capoeta aculeata and Alburnus mossulensis have had the most frequency. Studying fish abundance showed Oxynoemacheilus argyrogramma with 17.8%, Garra rufa with 12.3%, A. mossulensis with 12.1% and C. aculeata with 10.2 % of total number of caught fish specimens are dominant. S. cephalus, Capoeta damascina, C. aculeata, C. trutta, Chondrostoma regium and A. mossulensis have had sport fishing value but Acanthobrama marmid, Oxynoemacheilus kiabii, Oxynoemacheilus kermanshahensis, Turcinoemacheilus kosswigi, Alburnus caeruleus and Mastacembelus mastacembelus have biodiversity value for being endemic or having limited habitats in Iran.
    Beschreibung: Iranian Fisheries Science Research Institute
    Beschreibung: Published
    Schlagwort(e): Fish diversity ; Abundance ; Distribution ; Specimens ; Sampling ; Cyprinidae ; Nemacheilidae ; Sisoridae ; Cobitidae ; Poeciliidae ; Salmonidae ; Mastacembelidae ; Capoeta capoeta
    Repository-Name: AquaDocs
    Materialart: Report , Refereed
    Format: 130pp.
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 3
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    Caspian whitefish, Rutilus frisii kutum Kamensky, 1901 a potential aquaculture candidate: study on the cumulative effects of salinity and temperature on culture performance (2018)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: In this study, growth and survival of the Caspian whitefish, Rutilus frisii kutum, (mean weight 0.59±0.06g) have been estimated at different rearing salinities (0, 5 and 10‰) and temperatures (24 and 28˚C). Maximum fish weight gain (493.65±14.07%) and specific growth rate (SGR) (2.74±0.15%), and minimum feed conversion ratio (FCR) (1.66±0.06) were obtained at salinity of 5‰ and temperature of 24˚C. There were significant differences in fish weight and length gain between the two rearing temperatures at salinity of 10‰ and between salinities of 0 and 5‰ at 24˚C (p〈0.05). However, salinity and temperature did not significantly affect fish survival. Factorial analysis of variance showed significant cumulative effects of salinity and temperature on fish weight and length gain, final weight and SGR (p〈0.05). This study confirmed that optimization of salinity and temperature is crucial in rearing a new fish species. Caspian whitefish fingerlings can be grown well at 5‰ and 24˚C although, it is recommended that the effects of a broader range of environmental variables as well as feed items must also be examined.
    Beschreibung: Published
    Schlagwort(e): Aquaculture ; Caspian whitefish ; Rutilus frisii kutum ; Salinity ; Temperature ; Growth indices ; Survival ; Performance ; Fingerlings
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp.623-633
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 4
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    Ecological study of zooplankton communities in the Persian Gulf Martyrs Lake (Chitgar-Tehran) and the first report of the freshwater jellyfish Craspedacusta sp. (Cnidaria, Limnomedusae) in Iran (2018)
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: This study focused on zooplankton structure, biodiversity, relationship between a biotic parameters and zooplankton variation, and trophy state of the Persian Gulf Martyrs Lake (Chitgar-Tehran). Based on the lake condition, samples were collected by Juday net at the 5 stations between 2013 and 2014. This study identified 36 zooplankton taxa comprised of Arthropoda (6 genus), Protozoa (6 genus), Rotatoria (20 genus), Nematoda (1 genus), Gastrotricha (2 genus) and Oligochaeta (1 genus). Furthermore, the first record of the freshwater jellyfish Craspedacusta sp. in Iran, with size group of 15-20 mm in diameter in September is reported in the Chitgar lake. The Rotatoria abundance average was measured 61 ±18 ind.l-1 in the lake. The Nematoda, Gastrotricha and Oligochaeta taxa were measured the lowest abundance (〈 1 ind.l-1 ) in this study. The annual average zooplankton abundance was measured as 72±18 ind.l-1 . The PCA displayed, the Rotatoria Trichocerca sp. and Polyarthera sp. were dominated with high components loading, low variance and high abundance. The CCA showed, there was no correlation between Rotatoria abundance and a biotic parameters. Based on the zooplankton structure and bio-indicator, the lake situation is in the meso-oligotrophic category. Thus, it is might be increased eutrophication trend due to no management and no aquatic control in this ecosystem
    Beschreibung: Published
    Schlagwort(e): First report ; Craspedacusta sp. ; Trophy ; Ecological ; Zooplankton ; Freshwater ; Abundance
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp.113-128
    Standort Signatur Erwartet Verfügbarkeit
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    ARTIKEL (OA)
  • 5
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    The Study of Rearing Density Effect on Growth and Survival of Fingerlings Kutum, Rutilus kutum, with Caspian Sea Water (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: Rutilus kutum is one of the most important economic fish species of Iranian costal of Caspian Sea. This species conducted more than 60% of fish caught in Caspian Sea annually, and more than 10 thousands fisherman engaged to its fishery. In present study, kutum fingerlings reared in two different densities include of 25 and 40 fish/m2 with mean weight of 17.5 ± 5.87 g. The period of test being planned 10 weeks and the test organism housed in circular concrete pools of 3 m3 capacity with flowing water and aeration in pools are supplied. The fishes feed by extrude food with 45% crude protein and 14% crude fat. After termination of the experiment, the result showed that weight gain performance, specific growth rate, condition factor, food efficiency rate and protein efficiency rate decreased, while food conversion ratio increased with rising of density, as their different was significance in two experimental treatments (p〈0.05). The kutum reared in low density showed significantly higher survival rate (SVR) (with 88.8%) than high density (with 76.9%) (p〈0.05). Based on the different observed effects of the density on growth and survival, it is recommended the use of a 25 kutum/m2 density for rearing by Caspian Sea water.
    Beschreibung: Iranian Fisheries Science Research Institute
    Beschreibung: Published
    Schlagwort(e): Rutilus kutum ; Density ; Culture ; Growth ; Survival ; Fishery ; Fingerlings ; SVR ; Rearing
    Repository-Name: AquaDocs
    Materialart: Report , Refereed
    Format: 28pp.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 6
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    Biological survey of Caspian kutum (Rutilus kutum) released fingerlings in Sefidroud river (Guilan Province) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publikationsdatum: 2021-05-19
    Beschreibung: Kutum fish (Rutilus kutum) is an anadromous cyprinid species that spawns in adjusted rivers to the Caspian Sea. Many million fingerlings were artificially produced and annually released in these rivers specifically in Sefidrud River by Iranian Fisheries Organization. In this study were estimated the staying period of Kutum fingerlings in Sefidrud River and its diet and growth. A small piece of the caudal fin was cut as a tagging method. About 50000 and 5200 individuals were marked during July and September 2013, respectively. The marked fish had an average total length 53.2±5.6 mm and body weight 1.11±0.26 g and were released in river around two kilometers of the estuary. The sampling of fishes had been earlier started from Feb. 2012 and continued until Feb. 2013 at five stations. Four stations were along river from three Kilometer of estuary to estuary and one station was in right side of estuary in the sea coast. The results showed that marked samples after releasing time were distributed in all studied area from 3 kilometers of estuary to estuary but they migrate mainly toward Caspian Sea in a short time. However the marked samples were observed in estuary and the sea coast after 6 and 24 hours of their releasing time, respectively, Kutum fingerlings remained in Sefidrud river ecosystem in a longer time, at least until end of our sampling period i.e. 105 days. The coefficient of vacuity index of the natural feeding study was 0.0, 49.0 and 30.6 % for phytoplankton, zooplankton and benthos, respectively. The average of GastroSomatic index, intensity of fullness and condition factor were calculated 6.30±3.25, 174.6±153.2 and 0.92±0.09, respectively. A temporal and spatial variation on main food items were observed in gut content of fish fingerlings from different locations and seasons. Gut contents were generally included 59 genera of phytoplankton, 15 groups of zooplankton and 10 groups of benthos. Nitzschia, Navicula and Synedra were dominated among phytoplankton genera with 45.83, 18.02 and 15.99 %, respectively. Among zooplankton groups; the Rotaria, Moeina and Difflugia were dominated with 22.30, 20.86 and 15.83%, respectively. Chironomidae and Gammaridae were the main food items among fed benthic animals with 83.67 and 11.15%, respectively. Furthermore 48 phytoplankton genera, 32 zooplankton genera and 6 benthic families were identified in ecosystem of Sefidrud river. Bacillariophyta phylum (with 23 genus), Rotatoria (with17 genus) and Chironomidae family were dominated in each mentioned groups, respectively. It is concluded that the Kutum fingerlings stay in Sefidrud River for a long time, although most of them migrate to Caspian Sea during first month after releasing. However dietary indices were normal in studied samples, the condition factor index seems to be low.
    Beschreibung: Iranian Fisheries Science Research Institute
    Beschreibung: Published
    Schlagwort(e): Rutilus kutum ; Fingerlings ; Kutum ; Fish ; Rotaria ; Moeina ; Difflugia ; Phytoplankton
    Repository-Name: AquaDocs
    Materialart: Report , Refereed
    Format: 160pp.
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 7
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    Unbekannt
    Studying native fishes in Hamadan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25437 | 18721 | 2018-09-23 16:57:02 | 25437 | Iranian Fisheries Science Research Institute
    Details
    Publikationsdatum: 2021-07-16
    Beschreibung: Studying native fishes of Hamadan province have been done in 159 stations from 51 important water resources (wetland, reservoir, spring, river and qanat) using with electric tool, cast-net, seine and gill-net gears from July 2010 to Oct. 2011 and the main aims were species identifying and determining their distribution and abundance in the studied area. In the study, 33411 fish specimens are caught in 257 times of sampling and selected randomly about 8500 individual and laboratory works showed the fish belong to 37 species from 7 families. Cyprinidae with 25, Nemacheilidae with 6 and Sisoridae with 2 species had the most diversity and Cobitidae, Poeciliidae, Salmonidae and Mastacembelidae had only a representative. 31 fish species were native or endemic and 6 species were alien. Fish species existed in all rivers of Ghezelozan and Sirvan sub-basins but there were not any fish in 10 rivers of Ghara-Chai sub-basin and in 6 rivers of Gamasiab sub-basin, too. Also, it was observe 1-3 fish species in 15 rivers, 4-6 fish species in 10 rivers, 7-10 fish species in 5 rivers and more than 10 fish species in 4 main water resources and Gamasiab sub-basin with 32 fish species was the most diversified and Ghezelozan sub-basin with 2 fish species was the least diversified. There were any species to 4 (mostly 1 or 2) fish species in studied qanats in Ghara-Chai and Gamasiab rivers sub-basins. 23 fish species existed in a subbasin, 12 species in 2 sub-basin, Capoeta capoeta in 3 sub-basin and Squalius cephalus in all sub-basins of studied area. Alburnoides nicolausi,Capoeta aculeata and Alburnus mossulensis have had the most frequency. Studying fish abundance showed Oxynoemacheilus argyrogramma with 17.8%, Garra rufa with 12.3%, A. mossulensis with 12.1% and C. aculeata with 10.2 % of total number of caught fish specimens are dominant. S. cephalus, Capoeta damascina, C. aculeata, C. trutta, Chondrostoma regium and A. mossulensis have had sport fishing value but Acanthobrama marmid, Oxynoemacheilus kiabii, Oxynoemacheilus kermanshahensis, Turcinoemacheilus kosswigi, Alburnus caeruleus and Mastacembelus mastacembelus have biodiversity value for being endemic or having limited habitats in Iran.
    Schlagwort(e): Biology ; Iran ; Hamadan Province ; Gamasiab River ; Ghara-Chai ; Gaveh Rud ; Ghezelozan ; Fish diversity ; Abundance ; Distribution ; Specimens ; Sampling ; Cyprinidae ; Nemacheilidae ; Sisoridae ; Cobitidae ; Poeciliidae ; Salmonidae ; Mastacembelidae ; Capoeta capoeta
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 130
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 8
    facet.materialart.
    Unbekannt
    Biological survey of Caspian kutum (Rutilus kutum) released fingerlings in Sefidroud River (Guilan Province) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25612 | 18721 | 2018-10-07 16:15:05 | 25612 | Iranian Fisheries Science Research Institute
    Details
    Publikationsdatum: 2021-07-16
    Beschreibung: Kutum fish (Rutilus kutum) is an anadromous cyprinid species that spawns in adjusted rivers to the Caspian Sea. Many million fingerlings were artificially produced and annually released in these rivers specifically in Sefidrud River by Iranian Fisheries Organization. In this study were estimated the staying period of Kutum fingerlings in Sefidrud River and its diet and growth. A small piece of the caudal fin was cut as a tagging method. About 50000 and 5200 individuals were marked during July and September 2013, respectively. The marked fish had an average total length 53.2±5.6 mm and body weight 1.11±0.26 g and were released in river around two kilometers of the estuary. The sampling of fishes had been earlier started from Feb. 2012 and continued until Feb. 2013 at five stations. Four stations were along river from three Kilometer of estuary to estuary and one station was in right side of estuary in the sea coast. The results showed that marked samples after releasing time were distributed in all studied area from 3 kilometers of estuary to estuary but they migrate mainly toward Caspian Sea in a short time. However the marked samples were observed in estuary and the sea coast after 6 and 24 hours of their releasing time, respectively, Kutum fingerlings remained in Sefidrud river ecosystem in a longer time, at least until end of our sampling period i.e. 105 days. The coefficient of vacuity index of the natural feeding study was 0.0, 49.0 and 30.6 % for phytoplankton, zooplankton and benthos, respectively. The average of GastroSomatic index, intensity of fullness and condition factor were calculated 6.30±3.25, 174.6±153.2 and 0.92±0.09, respectively. A temporal and spatial variation on main food items were observed in gut content of fish fingerlings from different locations and seasons. Gut contents were generally included 59 genera of phytoplankton, 15 groups of zooplankton and 10 groups of benthos. Nitzschia, Navicula and Synedra were dominated among phytoplankton genera with 45.83, 18.02 and 15.99 %, respectively. Among zooplankton groups; the Rotaria, Moeina and Difflugia were dominated with 22.30, 20.86 and 15.83%, respectively. Chironomidae and Gammaridae were the main food items among fed benthic animals with 83.67 and 11.15%, respectively. Furthermore 48 phytoplankton genera, 32 zooplankton genera and 6 benthic families were identified in ecosystem of Sefidrud river. Bacillariophyta phylum (with 23 genus), Rotatoria (with17 genus) and Chironomidae family were dominated in each mentioned groups, respectively. It is concluded that the Kutum fingerlings stay in Sefidrud River for a long time, although most of them migrate to Caspian Sea during first month after releasing. However dietary indices were normal in studied samples, the condition factor index seems to be low.
    Schlagwort(e): Aquaculture ; Iran ; Caspian Sea ; Rutilus kutum ; Fingerlings ; Kutum ; Fish ; Rotaria ; Moeina ; Difflugia ; Phytoplankton
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 160
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 9
    facet.materialart.
    Unbekannt
    Ecological study of zooplankton communities in the Persian Gulf Martyrs Lake (Chitgar-Tehran) and the first report of the freshwater jellyfish Craspedacusta sp. (Cnidaria, Limnomedusae) in Iran (2021)
    In:  http://aquaticcommons.org/id/eprint/22178 | 18721 | 2018-02-21 17:37:18 | 22178 | Iranian Fisheries Science Research Institute
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: This study focused on zooplankton structure, biodiversity, relationship between a biotic parameters and zooplankton variation, and trophy state of the Persian Gulf Martyrs Lake (Chitgar-Tehran). Based on the lake condition, samples were collected by Juday net at the 5 stations between 2013 and 2014. This study identified 36 zooplankton taxa comprised of Arthropoda (6 genus), Protozoa (6 genus), Rotatoria (20 genus), Nematoda (1 genus), Gastrotricha (2 genus) and Oligochaeta (1 genus). Furthermore, the first record of the freshwater jellyfish Craspedacusta sp. in Iran, with size group of 15-20 mm in diameter in September is reported in the Chitgar lake. The Rotatoria abundance average was measured 61 ±18 ind.l-1 in the lake. The Nematoda, Gastrotricha and Oligochaeta taxa were measured the lowest abundance (〈 1 ind.l-1 ) in this study. The annual average zooplankton abundance was measured as 72±18 ind.l-1 . The PCA displayed, the Rotatoria Trichocerca sp. and Polyarthera sp. were dominated with high components loading, low variance and high abundance. The CCA showed, there was no correlation between Rotatoria abundance and a biotic parameters. Based on the zooplankton structure and bio-indicator, the lake situation is in the meso-oligotrophic category. Thus, it is might be increased eutrophication trend due to no management and no aquatic control in this ecosystem.
    Schlagwort(e): Biology ; Ecology ; Fisheries ; Zooplankton ; Abundance ; Trophy ; Chitgar lake ; freshwater ; Ecological ; Craspedacusta sp. ; first report ; Iran
    Repository-Name: AquaDocs
    Materialart: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 113-128
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
  • 10
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    Unbekannt
    The study of rearing density effect on growth and survival of fingerlings Kutum, Rutilus kutum, with Caspian Sea water (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25631 | 18721 | 2018-10-07 16:55:18 | 25631 | Iranian Fisheries Science Research Institute
    Details
    Publikationsdatum: 2021-07-16
    Beschreibung: Rutilus kutum is one of the most important economic fish species of Iranian costal of Caspian Sea. This species conducted more than 60% of fish caught in Caspian Sea annually, and more than 10 thousands fisherman engaged to its fishery. In present study, kutum fingerlings reared in two different densities include of 25 and 40 fish/m^2 with mean weight of 17.5±5.87 g. The period of test being planned 10 weeks and the test organism housed in circular concrete pools of 3 m^3 capacity with flowing water and aeration in pools are supplied. The fishes feed by extrude food with 45% crude protein and 14% crude fat. After termination of the experiment, the result showed that weight gain performance, specific growth rate, condition factor, food efficiency rate and protein efficiency rate decreased, while food conversion ratio increased with rising of density, as their different was significance in two experimental treatments (p〈0.05). The kutum reared in low density showed significantly higher survival rate (SVR) (with 88.8%) than high density (with 76.9%) (p〈0.05). Based on the different observed effects of the density on growth and survival, it is recommended the use of a 25 kutum/m^2 density for rearing by Caspian Sea water.
    Schlagwort(e): Aquaculture ; Iran ; Caspian Sea ; Rutilus kutum ; Density ; Culture ; Growth ; Survival ; Fishery ; Fingerlings ; SVR ; Rearing
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 28
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    ARTIKEL (OA)
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