scholarly journals Environmental Investigations and Tissue Bioaccumulation of Heavy Metals in Grey Mullet from the Black Sea (Bulgaria) and the Ionian Sea (Italy)

Animals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1739
Author(s):  
Francesco Fazio ◽  
Claudio D’Iglio ◽  
Gioele Capillo ◽  
Concetta Saoca ◽  
Katya Peycheva ◽  
...  
Keyword(s):  
Black Sea ◽  
Marine Pollution ◽  
Total Concentration ◽  
Essential Elements ◽  
Analytical Determination ◽  
The Black Sea ◽  
Ionian Sea ◽  
Grey Mullet ◽  
Coastal Marine ◽  
Fish Samples

The environmental monitoring of chemical toxicants has been a widely studied topic in the last few decades. The main aim of the present study was to determine the total concentration of nine elements (Cd, Cr, Pb, Ni, Al, Cu, Fe, Mn, and Zn) in the fish species grey mullet (M. cephalus) and in the coastal marine waters collected from various sampling points along the Black Sea (Bulgaria) and the Ionian Sea (Italy). Further, those results were applied to predict the pollution degree in those coastal marine environments. The fish samples were subject to acid digestion followed by appropriate analytical determination. The metal concentrations in marine water samples collected from the Black Sea (Bulgaria) and the Ionian Sea (Italy) were also analyzed. Unpaired Student’s t-test and the one-way ANOVA were applied for the statistical analysis of the data. The statistical results revealed a significant variation (p < 0.0001) in the concentration of various fish tissues. The accumulation of toxic and essential elements differs significantly in grey mullet species caught from the Black Sea (Bulgaria) and the Ionian Sea (Italy). The results from this study may serve as a convenient approach during marine pollution programs set by both countries (Italy and Bulgaria).

In the Search of an Appropriate Legal Framework to Prevent Environmental Risks Caused by Navigation in the Black Sea

2017 ◽  
Vol 19 (2-3) ◽  
pp. 194-230
Author(s):  
Gabriela A. Oanta
Keyword(s):  
Black Sea ◽  
International Organizations ◽  
Marine Pollution ◽  
Regional Cooperation ◽  
Legal Framework ◽  
Environmental Risks ◽  
The Black Sea ◽  
Trade Routes ◽  
International Responsibility ◽  
The One

This article addresses the legal framework pertaining to navigation in the Black Sea (including the Turkish Straits System) – which is currently one of the busiest trade routes globally – and its implications for the protection and preservation of the marine environment in this region. This framework is a comprehensive and complex system that is based, on the one hand, upon norms established by different global diplomatic conferences and international organizations that are therefore also applicable to the Black Sea and its coastal States; on the other hand, the regional cooperation fora for the Black Sea have also created specific standards for the region. In addition, the implications of the delimitation of maritime areas in the Black Sea and the international responsibility of States in the field of marine pollution caused by navigation will also be examined.

scholarly journals First record of the Combtooth Blenny, Microlipophrys adriaticus (Steindachner & Kolombatovic, 1883) (Pisces, Blenniidae), for the Italian Ionian Sea

Check List ◽  
2015 ◽  
Vol 11 (3) ◽  
pp. 1646 ◽  
Author(s):  
F. Tiralongo ◽  
R. Baldacconi
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Adriatic Sea ◽  
First Record ◽  
The Black Sea ◽  
Ionian Sea ◽  
Sea Of Marmara ◽  
Limited Distribution ◽  
The North ◽  
The Mediterranean

Microlipophrys adriaticus (Steindachner & Kolombatovic, 1883) is an endemic blenny of the Mediterranean Sea. It is also known from the Sea of Marmara and the Black Sea. However, unlike other species of combtooth blennies, M. adriaticus is a fish with a limited distribution in Adriatic Sea, especially in the north, where it can be common. We report here the first record of this species from the waters of the Ionian Sea.

scholarly journals The fishes of the Bolaman Stream, Northern Turkey

2021 ◽  
Vol 4 (1) ◽  
pp. 38-54
Author(s):  
Serkan Saygun
Keyword(s):  
Black Sea ◽  
Fish Species ◽  
Fish Fauna ◽  
The Black Sea ◽  
Fish Samples ◽  
First Time ◽  
Squalius Cephalus

In this study, the fish species inhabiting the Bolaman Stream drains to the Black Sea from the Fatsa coast (Ordu Province, Turkey) was reported for the first time. The study was caught out non-periodically by sampling from seven stations in the Bolaman Stream between July 2017 and November 2018. Fish samples were captured with an electroshock device. With this study, it was determined that the fish fauna of the Bolaman Stream is represented by 10 species in five families (Acheilognothidae, Cyprinidae, Gobiidae, Leuciscidae, and Salmonidae). These species were as follows, respectively Rhodeus amarus, Barbus tauricus, Capoeta banarescui, Neogobius fluviatilis, Ponticola turani, Alburnus derjugini, Squalius cephalus, Vimba vimba, Alburnoides fasciatus, and Salmo coruhensis.

scholarly journals New data on wild grey mullet (mugil cephalus linnaeus, 1758) myxosporean (myxobolus episquamalis egusa et al., 1990) in the black sea

2020 ◽  
Vol 175 ◽  
pp. 02014
Author(s):  
Anna Kazarnikova ◽  
Tatyana Strigakova ◽  
Evgeny Bortnikov ◽  
Ovkar Byadgi ◽  
Marco Galeotti ◽  
...  
Keyword(s):  
Black Sea ◽  
Infected Fish ◽  
Mugil Cephalus ◽  
Fish Mortality ◽  
The Black Sea ◽  
Grey Mullet ◽  
Frontal View ◽  
Universal Primer ◽  
Russian Waters ◽  
18S Rdna Gene

Flathead grey mullet, Mugil cephalus, with mass whitish cystlike plasmodia on their scales were collected at Kerchensky preglass of the Black Sea in 2015. The prevalence of infected fish varied from 15% in spring, reached 100% in summer, and declined to 2.5% in autumn. No fish mortality was detected. The spores were oval in frontal view, tapering to a blunt apex. Two unequal polar capsules were pyriform and extended over the anterior half of spore. Spores were 8.2±0.03 µm (7.9-8.4) long, 5.9±0.23 µm (5.2-7.3) wide, and 4.4±0.17 µm (4.0-4.7) thick. Two pyriform and unequal polar capsules were observed (4.0±0.07 µm (3.3-4.5) long, and 1.5±0.24 µm (1.1-1.8) wide). The investigation of nucleotide sequences of the 18S rDNA gene of the myxosporean spores from scales with universal primer А (5′-ACCTGGTTGATCCTGCCAGT-3′) and В (5′-TGATCCTTCTGCAGGTTCACCTAC-3′) showed 100% identity with episquamalis, and 99 % with M. bizerti, M. ichkeulensis, M. spinacurvata and Myxobolus sp. previously detected in mullets. The results obtained from the present study reveal that M. episquamalis, found on the scales of M. cephalus from Kerchensky preglass of the Black Sea, is new record for Russian waters.

Toxic and essential elements in butter from the Black Sea region, Turkey

2013 ◽  
Vol 7 (1) ◽  
pp. 49-53 ◽  
Author(s):  
Muhammet Dervisoglu ◽  
Osman Gul ◽  
Fehmi Yazici ◽  
Dilek Guvenc ◽  
Enes Atmaca ◽  
...  
Keyword(s):  
Black Sea ◽  
Essential Elements ◽  
The Black Sea ◽  
Black Sea Region ◽  
Toxic And Essential Elements

scholarly journals Bioresource capacity of the black sea and its development by the national fishery in the XX and XXI centuries

2019 ◽  
Vol 89 (11) ◽  
pp. 1105-1119
Author(s):  
Dmitry Ya. Fashchuk
Keyword(s):  
Black Sea ◽  
Marine Pollution ◽  
Chemical Pollution ◽  
The Black Sea ◽  
Mnemiopsis Leidyi ◽  
Commercial Fish ◽  
Dynamics Of Population ◽  
History Of ◽  
Natural Dynamics ◽  
Catch Composition

In this paper, the history of the formation, dynamics of structure, and species composition of the main objects of the national fishery in the Black Sea from the moment of the fall of the Crimean Khanate in 1783 up to today are analyzed, as well as the structure of commercial biological resources of the sea formed throughout the geological history of development of the Ponto-Caspian Basin (more than 30 million years). The geography and catch composition, scales, and methods of fish harvesting in the twentieth and twenty-first centuries are examined. The stages of intensification and reduction of fish harvesting success and the causes of these fluctuations (natural dynamics of population abundance, press of predatory species, hydrotechnical construction, marine pollution, overfishing, poaching) are identified. The author shows that at the end of the twentieth century, the Russian fishing industry entered a depressed state, while the other Black Sea countries increased their average annual total catch. At the same time, starting at the beginning of the twenty-first century, due to the lessening of press of warty comb jelly (Mnemiopsis leidyi), a decrease in the level of oil and chemical pollution of coastal and shelf waters in the northern Black Sea, and a reduction in industrial production on the seacoast and watershed territories, the ecological situation in the Russian territorial waters improved significantly and many formerly commercial fish populations started to recover.

scholarly journals Heavy metal contamination of Pleuronectiformes species from Sinop coasts of the Black Sea

2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Levent Bat ◽  
Fatih Şahin ◽  
Ayşah Öztekn
Keyword(s):  
Heavy Metals ◽  
Black Sea ◽  
Heavy Metal Contamination ◽  
Scophthalmus Maximus ◽  
Essential Amino Acids ◽  
The Black Sea ◽  
Limit Values ◽  
Fish Samples ◽  
The Mean ◽  
Cu And Zn

In the Turkish Black Sea coasts fish is particularly consumed because of high protein supplies, essential amino acids, vitamin, and mineral content. Fish are exposed to contaminants such as heavy metals in polluted waters. The aims of the study are to determine heavy metals in Pleuronectiformes species from Sinop coasts of the Black Sea and determine the health risks due to the consumption of contaminated fish. Pleuronectiformes species Scophthalmus maximus (Linnaeus, 1758) belonging to Scophthalmidae family, Arnoglossus laterna (Walbaum, 1792) belonging to Bothidae family and Pegusa lascaris (Risso, 1810) belonging to Soleidae family were collected from Sinop coasts of the Black Sea in fishing season of 2016. Heavy metals (Hg, Cd, Pb, Cu and Zn) in edible tissues were determined by ICP-MS (Agilent 7700x). The limit values given by the international and national organizations did not exceed in the muscle tissues of turbot, Mediterranean scald fish and sand sole. Overall Zn was detected in higher concentrations in all species followed by Cu, Pb, Hg and Cd. The results obtained from the analyses of the maximum levels of the metals except Hg were found in turbot. The highest Hg (0.021±0.007 µg g-1 wet wt.) was found in sand sole. However, the high amounts of Cd, Pb, Cu and Zn in turbot were 0.011±0.004, 0.07±0.005,1.32±0.28 and 14±3 µg g-1 wet wt., respectively. The EDIs and EWIs of the metals were estimated taking into account the mean of metal in all fish samples and the mean consumption of fish per day/week for adults. These results are normally significantly lower than the recommended values of FAO/WHO. Estimated HIs of all the considered metals were below the value of 1, therefore the metals in fish samples do not toxic any apparent threat to the population and these fishes are healthy for consumption.Keywords: Scophthalmus maximus, Arnoglossus laterna, Pegusa lascaris, heavy metals, Black Sea

scholarly journals Peculiarities of Pollution by Some Persistent Organic Pollutants of the Marine Environment of the Northwestern Part of the Black Sea

2020 ◽  
Keyword(s):  
Black Sea ◽  
Marine Environment ◽  
Bottom Sediments ◽  
Sea Water ◽  
Marine Pollution ◽  
Marine Organisms ◽  
The Black Sea ◽  
Northwestern Part ◽  
Marine Biota ◽  
Ecological State

Purpose. The study is aimed at estimation of marine pollution in the northwestern part of the Black Sea by some persistent organic pollutants (POPs), in particular polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB). Methods. Peculiarities of marine pollution were determined on the basis of research conducted at the Ukrainian Scientific Center of Ecology of the Sea (UkrSCES). The content of PCBs and HCB was determined on a gas chromatograph Agilent 7890B with a capillary column and an electronic capture detector using the methods of the US Environmental Protection Agency (EPA-3545A, 3630C, 8081, 8082A, 8275A). The ecological state of the marine environment was determined using developed in UkrSCES the “Ecological standards of marine environment quality”, which allow us to assess the quality status of such components of the marine environment (sea water, bottom sediments and biota). Results. The methodology of environmental standards has been adapted to assess the pollution of the marine environment of POPs. The ecological state of sea water and bottom sediments of the northwestern part of the Black Sea is determined according to the established values of Maximum Concentration Limit (MCL) and Ecological Standards (ES). The ecological state of marine biota was assessed by HCB pollution according to the established Ecological Standard. The European analogue of MCL (MAC-EQS) for industrial marine organisms was used to assess the ecological state of marine organisms for PCBs pollution (but it should be noted that the assessment was performed only for non-dioxin-like PCBs. Standard for the content of PCBs in marine organisms, in particular, – of industrial importance, must be implemented in Ukraine at the legislative level. For integral assessment of the ecological state of the marine environment and the specifics of POPs pollution in the northwestern part of the Black Sea, it is necessary to introduce a comprehensive monitoring system that would analyze marine pollution by all POPs required by the Stockholm Convention. Conclusions. The ecological state of the sea water of the northwestern part of the Black Sea by POPs pollution in most cases corresponds to the category "very good". The state of marine biota in most cases corresponds to the quality classes "good" and "very good", but in Ukraine there are no clear standards that would regulate the content of PCBs in marine biota, in particular – for industrial important species of marine organisms. The ecological condition of bottom sediments is mainly classified as "satisfactory" and "poor", which under certain natural conditions can be a source of secondary pollution of sea water and biota. For integral assessment of the ecological state, it is necessary to take into account all POPs, which can significantly change the results of the assessment of the quality of the marine environment of the northwestern part of the Black Sea.

scholarly journals The role of the isolation of the marginal seas during the Pleistocene in the genetic structure of black sea bream Acanthopagrus schlegelii (Bleeker, 1854) in the coastal waters of Japan

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11001
Author(s):  
Yutaro Yamashita ◽  
Gustavo Sanchez ◽  
Kentaro Kawai ◽  
Satoshi Tomano ◽  
Hiroki Fujita ◽  
...  
Keyword(s):  
Population Structure ◽  
Pacific Ocean ◽  
Black Sea ◽  
Coastal Waters ◽  
Sea Bream ◽  
The Black Sea ◽  
Northwestern Pacific ◽  
Marginal Seas ◽  
Coastal Marine ◽  
Japanese Waters

The black sea bream Acanthopagrus schlegelii (Bleeker, 1854) is a commercially important species in Japanese waters. Assessing its population structure is essential to ensure its sustainability. In the Northwestern Pacific, historical glacial and interglacial periods during the Pleistocene have shaped the population structure of many coastal marine fishes. However, whether these events affected the population of black sea bream remains unknown. To test this hypothesis and to assess the population structure of black sea bream, we used 1,046 sequences of the mitochondrial control region from individuals collected throughout almost the entire Japanese coastal waters and combined them with 118 sequences from populations distributed in other marginal seas of the Northwestern Pacific Ocean. As in other coastal marine fish with similar distribution, we also found evidence that the glacial refugia on the marginal seas prompted the formation of three lineages in black sea bream. These lineages present signatures of population growth that coincided with the interglacial periods of the Pleistocene. While the origin of Lineages B and C remains unclear, the higher relative frequency of Lineage A in the southernmost location suggests its origin in the South China Sea. The non-significant pairwise ΦST and AMOVA of Japanese populations and the presence of these three lineages mixed in Japanese waters; strongly suggest that these lineages are homogenized in both the Sea of Japan and the Pacific Ocean. Our results indicate that the black sea bream should be managed as a single stock in Japan until the strength of connectivity in contemporary populations is further addressed using non-coding nuclear markers.

scholarly journals Impact of terrestrial and marine pollution on the Black Sea quality of water

2019 ◽  
pp. 192-199
Author(s):  
Victorita Radulescu
Keyword(s):  
Black Sea ◽  
Marine Pollution ◽  
Local Equilibrium ◽  
The Black Sea ◽  
The European Union ◽  
North East ◽  
The North ◽  
Sources Of Pollution ◽  
Quality Of Water ◽  
The Impact

Black Sea represents a direct link between the European Union, EU candidate countries and some Asian countries such as Russia, Georgia, etc. During the last decades, the Black Sea has been confronted with unexpected environmental problems. In the south part of the Romanian seashore has appeared erosion, in the North-East part of the Black Sea appeared a massive algae development, followed by modification of the maritime biological balance. In parallel, the maritime water parameters have been changed, partly due to the water discharged from the main rivers as Danube, Dnieper, Dniester, partly from the amount of freshwater from deep currents new appeared in the last decades, and partly due to the impact of the pollutant sources. Firstly, are mentioned some data, based on the local measurements and registered data, which underlines the actual situation, referring at the existing sources of pollution, the hydrocarbons and ions concentration, etc. with immediate consequences on the local equilibrium of the marine bio-system. The registered Turkish accidents with spilled oil briefly mentioned, were followed in a short term by a process of nitrification, with many consequences. Next are presented the appeared modifications, registered in the Black Sea fauna, some endangered species, correlated with the simultaneous apparition of some invasive species. Finally, some conclusions and references are presented.

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