scholarly journals Annual and Seasonal Variation in Artemia Population in Relation to Water Quality Parameters in Lake Galgas in Crimea, Russia

2019 ◽  
pp. 1-9
Author(s):  
Rudneva Irina Ivanovna ◽  
Shaida Valentin Grigor’evich ◽  
Sherba Anton Viktorovich ◽  
Zav’vyalov Andrei Veniaminovich
Keyword(s):  
Oxygen Concentration ◽  
Black Sea ◽  
Developmental Stages ◽  
Quality Parameters ◽  
The Black Sea ◽  
Hatching Rate ◽  
Northern Coast ◽  
Hydrochemical Characteristics ◽  
Local Climate ◽  
Artemia Population

Aim: To study seasonal changes of hydrological parameters of the water and Artemia population status in the hypersaline Galgas Lake in the period of 2017-2019. Study Area and Duration: The study was carried out in the Crimea, a peninsula on the northern coast of the Black Sea in Eastern Europe in 2017-2019. Methodology: Water (brine) and Artemia samples were collected monthly from the lake located at the coastal line of the Black Sea. The parameters namely temperature, pH, salinity, Eh, and oxygen concentration of were determined in the water. Artemia population including the developmental stages and the cysts hatching rate of the cysts were measured in different seasons in the study period. The differences in hydrochemical characteristics of the study area in different years and seasons were observed. Results: The results showed that the hydrochemical characteristics of the study area varied with the climate peculiarities. In summer months 2017, the lake was dried out. In the hot period, the temperature of the air and water was above +30°C, the pH ranged insignificantly, and the oxygen concentration was low. Artemia cysts were found throughout the year, however the nauplii were mostly available during spring and autumn seasons, while the adults were found in spring and summer months. Conclusion: The study concluded that the changes of the water parameters depended on season and especially on air temperature. The changes of Artemia population were different in examined years and depended on the water characteristics and especially on temperature and oxygen concentration. The obtained results could be helpful for the local climate changes consequences studies and their influence on aquatic biota.

Hydrochemical Characteristics of Water of Balaklava Bay and Adjacent Coastal Part of the Black Sea

2000 ◽  
Vol 36 (6) ◽  
pp. 15
Author(s):  
Ye. A. Kuftarkova ◽  
N. P. Kovrigina ◽  
N. Yu. Rodionova
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Hydrochemical Characteristics

A new species of Cymbasoma (Copepoda, Monstrilloida) from the northern coast of Turkey (Black Sea) with comments on the C. longispinosum species-group

Crustaceana ◽  
2014 ◽  
Vol 87 (11-12) ◽  
pp. 1393-1410 ◽  
Author(s):  
F. Üstün ◽  
T. Terbiyik Kurt ◽  
E. Suárez-Morales
Keyword(s):  
New Species ◽  
Black Sea ◽  
Gulf Of California ◽  
Relative Length ◽  
Species Group ◽  
The Body ◽  
The Black Sea ◽  
Northern Coast ◽  
Black Sea Coast ◽  
The One

Cymbasoma sinopense sp. nov. is described from an adult female collected off the Sinop coast, in the southern Black Sea, Turkey. This is the first species of this genus recorded from the Black Sea coast of Turkey. The new species is a member of the widespread Cymbasoma longispinosum species-group, and it closely resembles C. chelemense Suárez-Morales & Escamilla, 1997 from the Yucatan Peninsula and C. californiense Suárez-Morales & Palomares-García, 1999 from the Gulf of California. This species can be distinguished by a combination of subtle characters, including the body proportions, the structure and armature of the fifth legs, the ornamentation of the genital somite, and the relative length of the ovigerous spines. A previous report of C. longispinosum from the northern Black Sea probably represented a misidentified record of C. sinopense sp. nov. The Mediterranean reports refer to a species that is different from the one of the Black Sea. Comparative comments and data including the main taxonomic characters of members of the Cymbasoma longispinosum species-group are presented. Overall, it is confirmed that records of this species from different geographic areas should be revised carefully because they could represent undescribed species. A key for the identification of the females of the currently known species assigned to the Cymbasoma longispinosum species-group is included.

Hydrophysical and Hydrochemical Characteristics of the Sea Areas Adjacent to the Estuaries of Small Rivers of the Russian Coast of the Black Sea

2014 ◽  
Vol 54 (3) ◽  
pp. 293-308
Author(s):  
P. O. Zavialov ◽  
P. N. Makkaveev ◽  
B. V. Konovalov ◽  
A. A. Osadchiev ◽  
P. V. Khlebopashev ◽  
...  
Keyword(s):  
Black Sea ◽  
Small Rivers ◽  
The Black Sea ◽  
Hydrochemical Characteristics

Tornado Climatology of Turkey

2014 ◽  
Vol 142 (6) ◽  
pp. 2345-2352 ◽  
Author(s):  
Abdullah Kahraman ◽  
Paul M. Markowski
Keyword(s):  
Black Sea ◽  
Mediterranean Coast ◽  
Severe Weather ◽  
The Black Sea ◽  
Northern Coast ◽  
Secondary Maximum ◽  
Early Evening ◽  
Southern Mediterranean ◽  
Internet Searches ◽  
Turkish State

Abstract A climatology of tornadoes in Turkey is presented using records from a wide variety of sources (e.g., the Turkish State Meteorological Service, European Severe Weather Database, newspaper archives, Internet searches, etc.). The climatology includes the annual, diurnal, geographical, and intensity distributions of both mesocyclonic and nonmesocyclonic tornadoes. From 1818 to 2013, 385 tornado cases were obtained. The tornadoes range from F0 to F3, with F1 being the most frequently reported or inferred intensity. Mesocyclonic tornadoes are most likely in May and June, and a secondary maximum in frequency is present in October and November. Nonmesocyclonic tornadoes (waterspouts) are most common in the winter along the (southern) Mediterranean coast and in the fall along the Black Sea (northern) coast. Tornadoes (both mesocyclonic and nonmesocyclonic) are most likely in the afternoon and early evening hours.

The Influence of Air Temperature on the Quality Parameters of the Black Sea Coastal Waters

2019 ◽  
pp. 62-85
Author(s):  
Sabina Zăgan ◽  
Mihaela-Greti Chiţu
Keyword(s):  
Black Sea ◽  
Air Temperature ◽  
Sea Water ◽  
Marine Ecosystem ◽  
Ambient Air ◽  
Superficial Layer ◽  
Quality Parameters ◽  
The Black Sea ◽  
Air Temperatures ◽  
Physical And Chemical

In this chapter, the authors point out the connection between some physical and chemical parameters of the Black Sea water under extreme air temperatures. In this context, the period from 2006 to 2012 was chosen as the study period, because it is characterized by very high values of air temperature, which significantly affect not only the quality of the Black Sea water in the superficial layer but also the marine ecosystem and life. Some quality parameters as water temperatures, oxygen regime or the degree of eutrophication have been collected and analyzed and they show noticeable variations relative to ambient air temperature changes, mainly if they are determined on the surface layer.

Spatial distribution of the Black Sea copepod, Calanus euxinus, estimated using multi-frequency acoustic backscatter

2016 ◽  
Vol 74 (3) ◽  
pp. 832-846 ◽  
Author(s):  
Serdar Sakınan ◽  
Ali Cemal Gücü
Keyword(s):  
Black Sea ◽  
Developmental Stages ◽  
Trophic Levels ◽  
Acoustic Backscatter ◽  
The Black Sea ◽  
Monitoring Tool ◽  
Specific Density ◽  
Ecosystem Monitoring ◽  
Acoustic Surveys ◽  
Deep Distribution

The copepod Calanus euxinus is a key prey species for fish in the Black Sea. To estimate the distribution and biomass of the late developmental stages of this species in July 2013, we analysed multi-frequency (38, 120, and 200 kHz) echo-sounder data from a fisheries survey of the Black Sea. The dependence of acoustic backscatter on frequency, i.e. the frequency response, was estimated for daytime scattering layers, which were confirmed by net catches to be dense, post-copepodite-stage (C4) aggregations of C. euxinus with prosome lengths greater than 2 mm. The high-resolution acoustic observations revealed that the nighttime, shallow distribution was bounded by the lower portion of the thermocline and that the daytime, deep distribution was bounded by oxygen. The dense and isolated aggregations were observed in seawater with a specific density, σT, of between 15.2 and 15.9 kg m−3. These results show that fisheries acoustic surveys, typically targeting only commercially exploited fish species, may also provide information on the lower trophic levels and thereby serve as an ecosystem-monitoring tool.

The Cimmerian Bosporus in the 5th Century BC (an Old Persian Inscription from Phanagoria)

2019 ◽  
Vol 25 (1) ◽  
pp. 8-43
Author(s):  
Vladimir D. Kuznetsov
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Northern Coast ◽  
Taman Peninsula ◽  
Persian Wars ◽  
The North ◽  
Old Persian ◽  
Sea Area ◽  
The City

Abstract This article is a historical commentary on the Old Persian inscription found at Phanagoria (the Taman peninsula, Russia) in 2016. One can think of four possibilities how the document appeared on the northern coast of the Black Sea: the shipping of the inscription or its fragment to Phanagoria together with other stones as ballast, the European Scythian campaign of Darius I, the expedition of Ariaramnes against the Scythians, and the erection of the stele with the inscription in Phanagoria after the capture of the city – supposedly by the Persian troops. The author rules out the first three possibilities and accepts the fourth one. The inscription was found overlying the ruins of Phanagoria’s defensive works – destroyed by a huge fire sometime in the late first or the early second quarter of the 5th century BC. Judging from the archaeological context of the find, the inscription must have been authored by Darius’ son Xerxes. Many other cities in the North Black Sea area yield evidence of synchronous fires and devastation, which gives us ground to connect the capture of Phanagoria with the evidence from Diodorus (12.31) about certain Archaianaktidai who came to power in the Cimmerian Bosporus. They ruled for 42 years and were succeeded by Spartokos. It is reasonable to presume that this change of power was a result of Pericles’ Pontic expedition reported by Plutarch (Per. 20). Thus the conquest of Phanagoria (along with other North Pontic cities) should be viewed in the context of the Graeco-Persian Wars.

Hydrophysical and hydrochemical characteristics of the sea areas adjacent to the estuaries of small rivers of the Russian coast of the Black Sea

Oceanology ◽  
2014 ◽  
Vol 54 (3) ◽  
pp. 265-280 ◽  
Author(s):  
P. O. Zavialov ◽  
P. N. Makkaveev ◽  
B. V. Konovalov ◽  
A. A. Osadchiev ◽  
P. V. Khlebopashev ◽  
...  
Keyword(s):  
Black Sea ◽  
Small Rivers ◽  
The Black Sea ◽  
Hydrochemical Characteristics
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