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  • 1
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    Studying oligochaeta density and distribution in the southern coasts of the Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: The oligochaeta density and distribution in the southern coasts of the Caspian was surveyed. Sampling was carried out in the depths of 10-20-50-100 meters from to Bandar-e-Turkaman. The results indicated that oligochaeta density enhanced with the increase in depth (in the surveyed areas). The main reasons for the enhancement are the smaller sediments particles and higher density of organiv matter in deeper sea beds. The studies were carried out in three different phases and time span. Hence lots of differences in Oligocheata densities were observed in each square meter. Also their frequency varied in different seasons. The maximum was observed in autumn and the minimum in summer. Temperature is indicate as an important parameter in this survey and the average temperature in each depth is calculated.
    Description: Published
    Keywords: Oligochaeta ; Density ; Distribution ; Temperature ; Parameter ; Sediments ; Survey
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.39-52
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  • 2
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    Investigation on genetic structure of Russian sturgeon (Acipenser gueldenstaedtii) populations of the north (Volga River) and south Caspian Sea (coasts of Iran and Turkmenistan) using microsatellite techniques (2018)
    Details
    Publication Date: 2021-05-19
    Description: A total of 28 specimens of adult Russian sturgeon brood fish from the Volga River (Astrakhan, Russia) and 42 specimens from the south Caspian Sea (coastline of Iran and Turkmenistan) were collected. About 2g of fin tissue was stored in 96% ethyl alcohol and transferred to the genetic laboratory of the International Sturgeon Research Institute. Genomic DNA was extracted using phenol-chloroform method. The quality and quantity of DNA was assessed by Agarose gel electrophoresis and spectrophotometry. Polymerase Chain Reaction (PCR) was conducted using eight pairs of microsatellite primers and its products were electrophoresed using 6% polyacrylamid gel followed by silver nitrate staining. Allele sizes were measured in all populations, then genetic parameters were calculated using Gen Alex program and the phylogenetic relationship was determined and drawn using TFPGA program. A minimum of 10 and a maximum of 21 alleles were identified per locus and the observed heterozygosity ranged between 0.50-0.96 and the expected heterozygosity was 0.74-0.90 with an average of 0.68. Hardy-Weinberg equilibrium was observed at Ls-19, Ls-39 loci, but showed disequilibrium in other loci. Fst index between Volga and South Caspian Sea samples was 0.031. The genetic similarity and distance was 0.661 and 0.414, respectively. Results of the present investigation indicate that there are no significant differences between the south Caspian Sea Russian sturgeon specimens.
    Description: Published
    Keywords: Rivers ; Microsatellites ; Gel electrophoresis ; Polymerase chain reaction ; Primers ; Coasts ; Acipenser gueldenstaedtii ; Acipenser ; Brackish ; Population Genetics ; Genes ; Electrophoresis ; Fins ; DNA ; Genetic diversity ; Natural populations ; Phylogenetics ; Phylogeny ; Heterozygosity ; Migration ; Alcohols ; Spectrophotometry ; Genomics ; Silver nitrate ; Genetic structure
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.69-80
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  • 3
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    Investigation on genetic structure of Russian sturgeon (Acipenser gueldenstaedtii) populations of the north (Volga River) and south Caspian Sea (coasts of Iran and Turkmenistan) using microsatellite techniques (2021)
    In:  http://aquaticcommons.org/id/eprint/23680 | 18721 | 2018-07-18 06:38:41 | 23680 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: A total of 28 specimens of adult Russian sturgeon brood fish from the Volga River (Astrakhan, Russia) and 42 specimens from the south Caspian Sea (coastline of Iran and Turkmenistan) were collected. About 2g of fin tissue was stored in 96% ethyl alcohol and transferred to the genetic laboratory of the International Sturgeon Research Institute. Genomic DNA was extracted using phenol-chloroform method. The quality and quantity of DNA was assessed by Agarose gel electrophoresis and spectrophotometry. Polymerase Chain Reaction (PCR) was conducted using eight pairs of microsatellite primers and its products were electrophoresed using 6% polyacrylamide gel followed by silver nitrate staining. Allele sizes were measured in all populations, then genetic parameters were calculated using Gen Alex program and the phylogenetic relationship was determined and drawn using TFPGA program. A minimum of 10 and a maximum of 21 alleles were identified per locus and the observed heterozygosity ranged between 0.50-0.96 and the expected heterozygosity was 0.74-0.90 with an average of 0.68. Hardy-Weinberg equilibrium was observed at Ls-19, Ls-39 loci, but showed disequilibrium in other loci. FST index between Volga and South Caspian Sea samples was 0.031. The genetic similarity and distance was 0.661 and 0.414, respectively. Results of the present investigation indicate that there are no significant differences between the south Caspian Sea Russian sturgeon specimens.
    Keywords: Biology ; Population Genetics ; Genes ; Electrophoresis ; Fins ; DNA ; Genetic diversity ; Natural populations ; Phylogenetics ; Phylogeny ; Heterozygosity ; Migration ; Alcohols ; Spectrophotometry ; Genomics ; Silver nitrate ; Genetic structure ; Rivers ; Microsatellites ; Gel electrophoresis ; Polymerase chain reaction ; Primers ; Coasts ; Acipenser gueldenstaedtii ; Acipenser ; Brackish ; Caspian Sea ; Caspian Sea Turkmenistan ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 69-80
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  • 4
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    Studying oligochaeta density and distribution in the southern coasts of the Caspian Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/23586 | 18721 | 2018-07-07 03:52:50 | 23586 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-14
    Description: The oligochaeta density and distribution in the southern coasts of the Caspian was surveyed. Sampling was carried out in the depths of 10-20-50-100 meters from to Bandar-e-Turkaman. The results indicated that oligochaeta density enhanced with the increase in depth (in the surveyed areas). The main reasons for the enhancement are the smaller sediments particles and higher density of organic matter in deeper sea beds. The studies were carried out in three different phases and time span. Hence lots of differences in oligocheata densities were observed in each square meter. Also their frequency varied in different seasons. The maximum was observed in autumn and the minimum in summer. Temperature is indicating as an important parameter in this survey and the average temperature in each depth is calculated.
    Keywords: Biology ; Ecology ; Density ; Distribution ; Temperature ; Parameter ; Sediments ; Survey ; Oligochaeta ; Bandar-e-Turkaman ; Caspian Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 39-51
    Location Call Number Expected Availability
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