scholarly journals Sexual dimorphism and microanatomical parameters of the Black sea sprat Clupeonella cultriventris (Nordmann, 1840) of the Bug lagoon during its spawning migration

2018 ◽  
pp. 30-42
Author(s):  
K. Geina ◽  
◽  
S. Shashlykova ◽  
M. Koziy ◽  
◽  
...  
Keyword(s):  
Sexual Dimorphism ◽  
Black Sea ◽  
Spawning Migration ◽  
The Black Sea

scholarly journals The first finding of Dinophilus gyrociliatus O. Schmidt, 1857 (Annelida, Polychaeta, Dinophilidae) at the Black Sea coast of Crimea

2016 ◽  
Vol 1 (2) ◽  
pp. 39-42 ◽  
Author(s):  
E. V. Lisitskaya ◽  
N. A. Boltachova
Keyword(s):  
Sexual Dimorphism ◽  
Black Sea ◽  
The Black Sea ◽  
Body Segment ◽  
First Finding ◽  
Black Sea Coast ◽  
Dinophilus Gyrociliatus ◽  
Sea Coast

The first finding of the polychaete Dinophilus gyrociliatus O. Schmidt, 1857 on the coast of Crimea is reported. The species occurred in 2015 in the waters of Sevastopol (Kruglaya Bay) at the depth of 3–5 m. This species is characterized by the absence of pigmentation, by the presence of one ciliary ring per body segment and by extreme sexual dimorphism. Reproduction of D. gyrociliatus were investigated in the laboratory. Females released cocoons containing from 3 to 10 eggs. Eggs development took 5 days at 18.0–19.5 ℃. The larvae of two types hatch from the cocoons: large females with a length of 500–600 μm and a width of 150–175 μm and small, rudimentarymales resembling trochophore with a diameter of about 100 μm.

MÖSSBAUER AND CHEMICAL ANALYSES OF SOME SEDIMENTS FROM THE ROMANIAN SHORE OF THE BLACK SEA

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-445-C2-448
Author(s):  
D. Barb ◽  
L. Diamandescu ◽  
M. Morariu ◽  
I. I. Georgescu
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Chemical Analyses

Modeling of ecological conditions in the Euxine Basin in the Sarmatian and Maeotian by methods of diatom analysis

2019 ◽  
pp. 257-261
Author(s):  
Eleonora P. Radionova
Keyword(s):  
Black Sea ◽  
Late Miocene ◽  
The Black Sea ◽  
Subtidal Zone ◽  
Diatom Analysis ◽  
Diatom Flora ◽  
North West ◽  
Ecological Conditions ◽  
The North

The associations and ecological conditions of the existence of modern diatoms of the North-West (Pridneprovsky), Prikerchensky and Eastern regions of the subtidal zone of the Black Sea are considered. Based on the unity of the composition of the Present and Sarmatian-Meotian diatom flora, an attempt has been made to model some of the ecological c situation of the Late Miocene Euxinian basin.

Subsatellite observations of the fundamental bio-optical parameters of the Black Sea (new approach)

2002 ◽  
Vol 8 (2-3) ◽  
pp. 231-238
Author(s):  
G.K. Korotaev ◽  
◽  
M.E. Li ◽  
G.A. Tolkachenko ◽  
◽  
...  
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Optical Parameters ◽  
New Approach

Significance of Mineralogical and Lithologic-Petrographical Rank in the Ranking of Geological Information

2020 ◽  
Vol 42 (4) ◽  
pp. 33-49
Author(s):  
O.V. CHEPIZHKO ◽  
V.V. YANKO ◽  
V.M. KADURIN ◽  
I.M. NAUMKO ◽  
S.M. SHATALIN
Keyword(s):  
Fluid Flow ◽  
Black Sea ◽  
Bottom Sediments ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Geochemical Characteristics ◽  
The Black Sea ◽  
Flow Parameters ◽  
Geochemical Parameters ◽  
Geological Information

For the first time the importance of mineralogical and lithological-petrographical ranks in the line of geological information ranks is substantiated for implementation of long-term forecasts, standard and non-standard approaches to research of physical and geochemical parameters as a basis of creation of complex system of forecast criteria and prospecting indicators of hydrocarbons within the sedimentary cover of Black sea based on the theory of global fluid-flows derivation. These criteria have different sensitivity to the object (hydrocarbon deposits) and are therefore ranked. The ranking determined the following parameters: 1) seismic data within the object, obtained by the method of deep seismic sounding, RWM SDP; 2) parameters of tectono-geodynamic structures; 3) the main characteristics of sedimentary cover and bedrock; 4) geochemical characteristics; 5) parameters of mineral complexes and fluid inclusions in mineral neoformations; 6) the value of the distribution of meiobenthos. Based on modern views of oil and gas geology, structural-tectonic and lithological-facies criteria are among the main ones. The study of the mineralogical component of sediments is made with using mineralogical, thermobarogeochemical and X-ray spectral methods. Fixation of anomalies of fluid flow at the bottom of the Black Sea as to the distribution of abiotic parameters in order to assess the prospects of oil and gas is determined by structural and tectonic features and high permeability of fluid flow; parameters of mineral complexes (minerals, facies) and genetic connections; heterogeneity of geochemical characteristics of bottom sediments; the presence of hydrocarbon inclusions in authigenic minerals of bottom sediments.

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