scholarly journals Benthic Macroinvertebrates along the Haraz Downstream in Southern Caspian Sea Basin: In Gradient of the Physicochemical Parameters

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Amir Faraz Ghasemi ◽  
Morteza Kamali
Keyword(s):  
Benthic Macroinvertebrates ◽  
Caspian Sea ◽  
Physicochemical Parameters ◽  
Anthropogenic Activities ◽  
Time Sampling ◽  
The Caspian Sea ◽  
Feeding Groups ◽  
Haraz River ◽  
Southern Caspian Sea

The Haraz River is one of the most important rivers in the Caspian Sea basin. In order to investigate changes in the taxa abundance composition and feeding groups of the benthic macroinvertebrates, twelve-time sampling was carried out at nine stations along three different sites: (1) before, (2) into, and (3) after Amol City. Results showed impacts of anthropogenic activities caused by the urbanization and development on the occurrence of benthic macroinvertebrates taxa. Families, Hydropsychidae and Heptageniidae at site 1 and Tipulidae at sites 2 and 3, were significantly dominant. The feeding groups of gathering collectors and predators increased from site 1 to site 3, while the filtering collectors and scrapers decreased. Consequently, our data supported the use of the bioindicator concept for Haraz River. Some sensitive (Hydropsychidae, Heptageniidae, Baetidae, and Leuctridae) and tolerant families (Tipulidae and Naididae/Tubificidae) are introduced as potential bioindicators of clean and disturbed river’s area, respectively.

X. Growing Tension and the Threat of War in the Southern Caspian Sea: The Unsettled Division Dispute and Regional Rivalry

2003 ◽  
Vol 2 (3) ◽  
pp. 575-591
Author(s):  
Hooman Peimani
Keyword(s):  
Caspian Sea ◽  
The United States ◽  
Caspian Region ◽  
Legal Regime ◽  
The Caspian Sea ◽  
Military Conflict ◽  
American Military ◽  
Military Presence ◽  
Military Conflicts ◽  
Southern Caspian Sea

AbstractThe absence of an acceptable legal regime for the division of the Caspian Sea among its five littoral states has created grounds for conflicts, crises, and wars in the Caspian region, a situation worsened since 2001 when Iran, Azerbaijan, and Turkmenistan found each other on a collision course over the ownership of certain offshore oilfields. The region has since been heading towards militarization, while the persistence of conflicts over the Caspian Sea's division has prepared the ground for military conflicts. Fear of lagging behind in an arms and the manipulation of conflicts by the United States and Turkey have further encouraged militarization. Against this background, certain factors, including Turkey's efforts to deny Iran political and economic gains in the Caspian region, the growing American military presence in Eurasia, and the expanding American-Azeri military ties since 11 September 2001 will likely contribute to the creation of a suitable ground for a military conflict in the Caspian region.

Paracobitis abrishamchiani, a new crested loach from the southern Caspian Sea basin (Teleostei: Nemacheilidae)

Zootaxa ◽  
2019 ◽  
Vol 4545 (3) ◽  
pp. 375 ◽  
Author(s):  
HAMED MOUSAVI-SABET ◽  
SABER VATANDOUST ◽  
MATTHIAS F. GEIGER ◽  
JÖRG FREYHOF
Keyword(s):  
New Species ◽  
Middle East ◽  
Caspian Sea ◽  
Colour Pattern ◽  
Nucleotide Substitutions ◽  
The Caspian Sea ◽  
Dorsal Fin ◽  
Mtdna Coi ◽  
River Drainages ◽  
Southern Caspian Sea

Paracobitis abrishamchiani, new species, is described from the southern Caspian Sea basin, where it is found in the Babol, Haraz, Siah, Tajan, Talar and Kashpal River drainages. It is distinguished from P. hircanica and P. atrakensis, the two other Paracobitis species known from the Caspian Sea basin, by having scales on the flank posterior to the dorsal-fin origin and from its congeners in the Middle East by the position of its dorsal-fin origin, having a roundish posterior narial opening, and a colour pattern consisting of many widely spaced brown spots and blotches. It is further characterized by six diagnostic nucleotide substitutions and a minimum K2P distance of 4.3% to P. persa and 4.6% to P. malapterura in the mtDNA COI barcode region. 

scholarly journals The first evidence for Late Pleistocene hominin populations on the southern Caspian Sea coast

Antiquity ◽  
2017 ◽  
Vol 91 (355) ◽  
Author(s):  
Hamed Vahdati Nasab ◽  
Kourosh Roustaei ◽  
Mohammad Ghamari Fatideh ◽  
Fatemeh Shojaeefar ◽  
Milad Hashemi Sarvandi
Keyword(s):  
Water Resources ◽  
Late Pleistocene ◽  
Caspian Sea ◽  
Climatic Conditions ◽  
Human Settlement ◽  
The Caspian Sea ◽  
The North ◽  
Dispersal Corridors ◽  
Sea Coast ◽  
Southern Caspian Sea

The southern shore of the Caspian Sea is well known for its great potential in relation to sites of Mesolithic date (e.g. Coon 1951; Jayez & Vahdati Nasab 2016). Situated between two major geographic barriers—the Alborz Mountains to the south, and the Caspian Sea to the north—this area has been considered one of the major hominin dispersal corridors during the Pleistocene–Holocene transition (Vahdati Nasab et al. 2013). Furthermore, the relatively stable and mild climatic conditions, vast and lush temperate forests, and abundance of fauna and water resources have all made this region an attractive niche for human settlement.

scholarly journals Length-weight relationship and condition factor of three endemic fish species, Ponticola bathybius, Neogobius caspius and N. pallasi (Perciformes: Gobiidae) from the Southern Caspian Sea basin, Iran

2021 ◽  
Vol 38 (4) ◽  
pp. 523-525
Author(s):  
Nasrin Nikmehr ◽  
Soheil Eagderi ◽  
Hadi Poorbagher ◽  
Keyvan Abbasi
Keyword(s):  
Fish Species ◽  
Caspian Sea ◽  
Condition Factor ◽  
Biological Information ◽  
Biological Research ◽  
The Caspian Sea ◽  
Baseline Information ◽  
Endemic Fish ◽  
First Time ◽  
Southern Caspian Sea

In this study, the length-weight relationships (LWRs) and condition factors were estimated for 445 specimens belonging to three gobiid species viz. Ponticola bathybius (Kessler, 1877), Neogobius caspius (Eichwald, 1831) and Neogobius pallasi (Berg, 1916) from the Southern Caspian Sea basin. Total length and total weight of the examined specimens ranged 4.9-28.3 cm and 0.64-263.4 g, respectively. The length-weight parameter b of the studied species found between 2.47 (N. caspius) and 3.45 (N. pallasi) with r2 ranging 0.831 to 0.988. LWR and K parameters are reported first time for N. pallasi from the Caspian Sea basin. The condition factor estimated was calculated from 0.94 (N. pallasi) to 0.98 (N. caspius) and 1.00 (P. bathybius). The basic biological information on the LWRs of these three gobies will be useful as baseline information for further biological research in the region.

scholarly journals Increased haplotype diversity of Emys orbicularis (Linnaeus, 1758) (Reptilia: Emydidae) in northern Iran

2021 ◽  
Vol 45 ◽  
pp. 24-32
Author(s):  
Seyyed Saeed Hosseinian Yousefkhani ◽  
Amaal Gh. Yasser ◽  
Murtada D. Naser ◽  
Eskandar Rsategar-Pouyani
Keyword(s):  
Caspian Sea ◽  
Isolation By Distance ◽  
Phylogenetic Analyses ◽  
Haplotype Diversity ◽  
Mantel Test ◽  
Conservation Action ◽  
The Caspian Sea ◽  
Northern Iran ◽  
Emys Orbicularis ◽  
Southern Caspian Sea

Emys orbicularis is an Old World terrapin that has a wide distribution range from Russia to Iran, Europe, and Northwestern Africa. In this study, we compare the Southern Caspian Sea lineage (in northern Iran) of E. orbicularis with other lineages of this species in Europe using the Cyt b gene fragment. Based on our results, the Caspian Sea lineage shows a high value of PhiPT (> 0.87) in comparison with other lineages that means the lineage isolated more from other lineages. Molecular phylogenetic analyses indicate that Iranian and Caucasus lineages are distinct from other lineages. The Mantel test confirmed the pattern of isolation by distance for the lineages from Western Europe to Asia. These results indicate that the Iranian population has a long history in the Caucasian and Southern Caspian Sea region (> 6 MYA). There are many reasons to conserve this species in Iran, as high inbreeding rates, low genetic variability, accidental events on the roads, and pet trade must be considered in future conservation action plans.

scholarly journals Relationship Between Trace Element Content in the Brain of Bony Fish Species and Their Food Items in the Southwest of the Caspian Sea Due to Anthropogenic Activities

2020 ◽  
Vol 7 (2) ◽  
pp. 78-85
Author(s):  
Masoud Sattari ◽  
Mohammad Forouhar Vajargah ◽  
Mehdi Bibak ◽  
Shima Bakhshalizadeh
Keyword(s):  
Fish Species ◽  
Caspian Sea ◽  
Anthropogenic Activities ◽  
Perca Fluviatilis ◽  
Principal Component ◽  
Aquatic Organisms ◽  
Trace Element Content ◽  
Bony Fish ◽  
The Caspian Sea ◽  
The Brain

The trace elements (TEs) in aquatic environments due to anthropogenic activities are readily available to aquatic organisms. There are 153 fish species inhabiting the Caspian Sea. However, little is known about TE (TE) concentrations in these species. In this study, we investigated the effects of TEs levels in the brain of some bony fish species inhabiting the Caspian basin. Totally, 405 fish from nine species with different feeding behaviors including Leuciscus aspius (n = 20) and Perca fluviatilis (n = 37) as piscivores, Rutilus kutum (n = 27) and Rutilus caspius (n = 71) as carnivores, Vimba persa (n = 56), Ponticola caspia (n = 25) and Tinca tinca (n = 31) as mollusivores, and Alburnus chalcoides (n = 77) and Alosa braschnikowi (n = 61) as zooplanktivores were collected from the southwest of the Caspian Sea basin from September 2017 to June 2018. The ICP-OES was used to measure TEs in the brain tissue of fish. The variability of TEs concentrations in the brain tissues of these fishes by principal component analysis (PCA) was decreased to 63.59% and 17.68% for PC1 and PC2, respectively, exhibiting that 81.27% of the total variability is associated with K, Mg, P, S, Zn, and Al. The two-dimensional diagrams showed the weight of each component in PCA. The PC1 was mostly influenced by P, Mg, K, and Zn, while the greatest value in PC2 belonged to Al. Furthermore, the entire number of elements determined in this study was found to be a suitable indicator for the distinction between fish species based on their feeding items.

Partitioning of metals in sediments of the Haraz River (Southern Caspian Sea basin)

2009 ◽  
Vol 59 (5) ◽  
pp. 1111-1117 ◽  
Author(s):  
Touraj Nasrabadi ◽  
Gholamreza Nabi Bidhendi ◽  
Abdolreza Karbassi ◽  
Nasser Mehrdadi
Keyword(s):  
Caspian Sea ◽  
Haraz River ◽  
Southern Caspian Sea

scholarly journals DISTRIBUTION OF SEVERAL HEAVY METALS (Cu, Zn, Ni, Co, Cr, Pb, Fe AND Mn) IN SURFACE LAYER OF B SEDIMENTS OF THE MIDDLE AND SOUTHERN CASPIAN SEA

2019 ◽  
Vol 47 (5) ◽  
pp. 26-51
Author(s):  
V. V. Gordeev ◽  
N. V. Kozina ◽  
G. N. Baturin
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Surface Layer ◽  
Chemical Composition ◽  
Atomic Absorption ◽  
Bottom Sediments ◽  
Caspian Sea ◽  
The Caspian Sea ◽  
Sediment Samples ◽  
Southern Caspian Sea

Atomic absorption determinations of a group of heavy metals (Cu, Zn, Ni, Co, Cr, Pb, Fe, Mn) in 190 samples of surface bottom sediments of the Middle and Southern Caspian Sea that were sampled by crab in middle of XX century (the collection of G.N. Baturin) and in 30 samples of recent sampling by grab also (2012–2015) were carried out. The aim of the investigations was to construct the schematic maps of heavy metal distribution in bottom sediments of both parts of the Caspian Sea on the materials of a half of century prescription that may serve as a base for comparison with the data of recent researches in frameworks of the program “The Caspian Sea System” under leadership of academic A.P.Lisitzin from 2012 till present time. The comparison between chemical composition of old and new sediment samples was realized, their similarities and divergences were revealed and probable reasons of divergences were presented. The maps of distribution of several metals (Fe, Mn, Co, Cr) are submitted together with necessary for interpretation maps of CaCO3, Corg and some other. It was shown that the structure of maps for all metals investigated was very similar because all these metals had concern to the group of iron.

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