POLYDORA WEBSTERI - A COMMENSAL OF ANADARA KAGOSHIMENSIS IN THE AZOV-BLACK SEA REGION

2021 ◽  
Vol 14 (2) ◽  
pp. 93-102
Author(s):  
V. L. Syomin ◽  
G. A. Kolyuchkina ◽  
M. D. Ptushkin ◽  
V. A. Timofeev ◽  
U. V. Simakova
Keyword(s):  
Black Sea ◽  
Crassostrea Gigas ◽  
Coastal Waters ◽  
Carbonate Rocks ◽  
Morphological Analysis ◽  
Sea Of Azov ◽  
Black Sea Region ◽  
Anadara Kagoshimensis ◽  
Kerch Strait ◽  
First Time

In January 2020, the presence of polychaete borers in the invader clam Anadara kagoshimensis (Tokunaga, 1906) was noted at the Chushka spit near Port Kavkas. Morphological analysis showed that the polychaetes belong to the species Polydora websteri Hartman in Loosanoff & Engle, 1943, non-indigenous to the Azov-Black Sea basin. This species was first recorded in coastal waters of Romania on carbonate rocks in 1997, followed by findings in 2009 and 2019 in coastal areas of Sevastopol and Lake Donuzlav, correspondingly, in oysters Crassostrea gigas (Thunberg, 1793). Polydora websteri has not previously been recorded from the Kerch Strait and the Sea of Azov. Its presence in Anadara kagoshimensis in the Azov-Black Sea region, which is an invasion area for both species, is shown for the first time.

ANALYSIS OF THE FUNCTIONING OF MARINE ECOSYSTEMS ON CHANGING THE PARAMETERS OF THE BIOLUMINESCENCE FIELD ON THE CRIMEAN BLACK SEA SHELF

2017 ◽  
Author(s):  
Svetlana Rubtsova ◽  
Svetlana Rubtsova ◽  
Natalya Lyamina ◽  
Natalya Lyamina ◽  
Aleksey Lyamin ◽  
...  
Keyword(s):  
Black Sea ◽  
Field Intensity ◽  
Deep Water ◽  
Coastal Waters ◽  
Integrated Management ◽  
Abiotic Factors ◽  
Environmental Safety ◽  
The Black Sea ◽  
Intensity Increase ◽  
First Time

The concept of a new approach to environmental assessment is offered in the system of integrated management of the resource and environmental safety of the coastal area of the Black Sea. The studies of the season and daily changeability in the bioluminescence field in the Sevastopol coastal waters has been conducted. For the first time considerable differences in the bioluminescence field seasonal changes in the surface and deep water layers and the reasons conditioning this phenomenon have been shown, using a method of multidimensional statistical analysis. The bioluminescence field vertical profile change in the Black sea coastal waters in the autumn period at night has been studied. It has been shown that according to the character of bioluminescence parameters dynamics a water column can be divided into layers: upper (0 – 35 m) and deep water (36 – 60 m). It has been revealed that life rhythms of the plankton community are the main reason for the bioluminescence field intensity variability. It has been revealed that 14-hour periodicity of the bioluminescence field is related to the changes in light and its variations with 2,5…4,5 hours are conditioned by planktonts endogenous daily rhythms. And here biotic factors effect mostly periodicity of the bioluminescence field intensity increase and fall down at the dark time of the day. Abiotic factors are of less importance in circadian rhythmic of the bioluminescence field in the neritic zone.

Study of water exchange in Kerch strait using NEMO model of Black Sea

2021 ◽  
Author(s):  
Roman Sedakov ◽  
Barnier Bernard ◽  
Jean-Marc Molines ◽  
Anastasiya Mershavka
Keyword(s):  
Water Flow ◽  
Black Sea ◽  
Water Exchange ◽  
Discharge Rate ◽  
The Black Sea ◽  
External Forcing ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
The North ◽  
Kerch Strait

<p>The Sea of Azov is a small, shallow, and freshened sea that receives a large freshwater discharge. Under certain external forcing conditions brackish water from the Sea of Azov flow into the north-eastern part of the Black Sea through the narrow Kerch Strait and form a surface-advected buoyant plume. Water flow in the Kerch Strait also regularly occurs in the opposite direction, which results in the spreading of an advected plume of saline and dense water from the Black Sea into the Sea of Azov. Using a regional Black Sea Azov Sea model based on NEMO we study physical mechanisms that govern water exchange through the Kerch Strait and analyze the dependence of its direction and intensity on external forcing conditions. We show that water exchange in the Kerch Strait is governed by a wind-induced barotropic pressure gradient. Water flow through the shallow and narrow Kerch Strait is a one-way process for the majority of the time. Outflow from the Sea of Azov to the Black Sea is induced by moderate and strong northerly winds, while flow into the Sea of Azov from the Black Sea is induced by southerly winds. The direction and intensity of water exchange have wind-governed synoptic and seasonal variability, and they do not depend on the variability of river discharge rate to the Sea of Azov on an intraannual timescale.</p>

scholarly journals Water exchange between the Sea of Azov and the Black Sea through the Kerch Strait

Ocean Science ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 15-30 ◽  
Author(s):  
Ivan Zavialov ◽  
Alexander Osadchiev ◽  
Roman Sedakov ◽  
Bernard Barnier ◽  
Jean-Marc Molines ◽  
...  
Keyword(s):  
Water Flow ◽  
Black Sea ◽  
Water Exchange ◽  
The Black Sea ◽  
External Forcing ◽  
Sea Of Azov ◽  
Buoyant Plume ◽  
The Sea Of Azov ◽  
The North ◽  
Kerch Strait

Abstract. The Sea of Azov is a small, shallow, and freshened sea that receives a large freshwater discharge. Under certain external forcing conditions low-salinity waters from the Sea of Azov flow into the north-eastern part of the Black Sea through the narrow Kerch Strait and form a surface-advected buoyant plume. Water flow in the Kerch Strait also regularly occurs in the opposite direction, which results in the spreading of a bottom-advected plume of saline and dense waters from the Black Sea into the Sea of Azov. In this study we focus on the physical mechanisms that govern water exchange through the Kerch Strait and analyse the dependence of its direction and intensity on external forcing conditions. Analysis of satellite imagery, wind data, and numerical modelling shows that water exchange in the Kerch Strait is governed by a wind-induced barotropic pressure gradient. Water flow through the shallow and narrow Kerch Strait is a one-way process for the majority of the time. Outflow from the Sea of Azov to the Black Sea is induced by moderate and strong north-easterly winds, while flow into the Sea of Azov from the Black Sea occurs during wind relaxation periods. The direction and intensity of water exchange have wind-governed synoptic and seasonal variability, and they do not depend on the rate of river discharge to the Sea of Azov on an intra-annual timescale. The analysed data reveal dependencies between wind forcing conditions and spatial characteristics of the buoyant plume formed by the outflow from the Sea of Azov.

Results of Monitoring of Temperature Conditions of Migration and Fishing of the Azov Khamsa

2020 ◽  
pp. 71-77
Author(s):  
Boris N. Panov ◽  
Elena O. Spiridonova ◽  
Michail M. Pyatinskiy ◽  
Aleksandr S. Arutyunyan
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Water Temperature ◽  
Black Sea ◽  
Sea Surface ◽  
The Black Sea ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Kerch Strait ◽  
Flood Zone

The paper presents the results of monitoring the process of migration and fishing of the Azov khamsa in April-May and October-November, 2019. The research used daily maps of sea surface temperature (SST) of the Black and Azov seas, built in the hydrometeorological Center of Russia according to NCDC/NOAA (Operational module Yessim - hmc.meteorf.ru/sea/black/sst/sst_black.htm) and daily fishing information of the Center for Monitoring of Fisheries and Communications. It is shown that in the spring, khamsa clusters begin to disperse and move to feeding places after the water temperature reaches 11 °C, and at a water temperature of 14-15 °C, the fish becomes much more mobile and the clusters finally disperse. In autumn, the Azov khamsa began to concentrate in the pre-flood zone of the Sea of Azov at an average SST of 16-17 °C, with a SST of 14-16 °C, the khamsa went out into the Kerch Strait. The active output of the khamsa into the Black Sea began at the SST of the pre-flood zone of 15 °C and almost stopped at the SST of about 13 °C. The average SST in the Kerch Strait dropped to 11 °C these days.

Ichneumonid (Hymenoptera) parasitoids of overwintering Hyphantria cunea (Drury) (Lepidoptera: Arctiidae) pupae in hazelnut plantations of the central Black Sea region of Turkey

Zootaxa ◽  
2010 ◽  
Vol 2608 (1) ◽  
pp. 63 ◽  
Author(s):  
G. T. SULLIVAN ◽  
I. KARACA ◽  
S. K. OZMAN-SULLIVAN ◽  
J. KOLAROV
Keyword(s):  
Black Sea ◽  
Corylus Avellana ◽  
Hyphantria Cunea ◽  
Black Sea Region ◽  
Central Black Sea Region ◽  
Site Diversity ◽  
Corylus Avellana L ◽  
Lepidopteran Pest ◽  
First Time

Overwintering pupae of the phytophagous lepidopteran pest Hyphantria cunea (Drury) (Lepidoptera: Arctiidae) were collected from 38 hazelnut (Corylus avellana L.) plantations in Samsun province, Turkey. Five species of ichneumonids, Virgichneumon dumeticola (Gravenhorst), V. albilineatus (Gravenhorst), Enicospilus ramidulus (L.), Pimpla rufipes (Miller) and one Gelis sp. were reared. Average parasitism was 0.13% and 2.33% for 2008 and 2009, respectively. Highest site parasitism was 14.9% and highest site diversity was 4 species. Virgichneumon dumeticola was the commonest species, with 73% of the total speciments. Virgichneumon albilineatus and E. ramidulus are reported for the first time from H. cunea, and V. albilineatus is also reported for the first time from Turkey. Gelis sp. is reported for the first time as a parasitoid of H. cunea in Turkey.

Geological and geomechanical properties of the carbonate rocks at the eastern Black Sea Region (NE Turkey)

2016 ◽  
Vol 123 ◽  
pp. 223-233 ◽  
Author(s):  
Hakan Ersoy ◽  
Bülent Yalçinalp ◽  
Mehmet Arslan ◽  
Ali Erden Babacan ◽  
Gözde Çetiner
Keyword(s):  
Black Sea ◽  
Carbonate Rocks ◽  
Black Sea Region ◽  
Geomechanical Properties

Polydora websteri—A Commensal of Anadara kagoshimensis in the Azov-Black Sea Region

2021 ◽  
Vol 12 (3) ◽  
pp. 309-316
Author(s):  
V. L. Syomin ◽  
G. A. Kolyuchkina ◽  
M. D. Ptushkin ◽  
V. A. Timofeev ◽  
U. V. Simakova
Keyword(s):  
Black Sea ◽  
Black Sea Region ◽  
Anadara Kagoshimensis
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