scholarly journals First recording of the non-native species Beroe ovata Mayer 1912 in the Aegean Sea

2007 ◽  
Vol 8 (1) ◽  
pp. 5 ◽  
Author(s):  
T.A. SHIGANOVA ◽  
E.D. CHRISTOU ◽  
I. SIOKOU
Keyword(s):  
Alien Species ◽  
Black Sea ◽  
Coastal Area ◽  
Native Species ◽  
Aegean Sea ◽  
The Black Sea ◽  
Ballast Waters ◽  
Beroe Ovata ◽  
The Mediterranean ◽  
Atlantic Coastal

A new alien species Beroe ovata Mayer 1912 was recorded in the Aegean Sea. It is most likely that this species spread on the currents from the Black Sea. Beroe ovata is also alien to the Black Sea, where it was introduced in ballast waters from the Atlantic coastal area of the northern America. The species is established in the Black Sea and has decreased the population of another invaderMnemiopsis leidyi, which has favoured the recovery of the Black Sea ecosystem.We compare a new 1 species with the native species fam. Beroidae from the Mediterranean and predict its role in the ecosystem of the Aegean Sea using the Black Sea experience.

scholarly journals New Mediterranean Biodiversity Records (July 2015)

2015 ◽  
Vol 16 (2) ◽  
pp. 472 ◽  
Author(s):  
K. TSIAMIS ◽  
Ö. AYDOGAN ◽  
N. BAILLY ◽  
P. BALISTRERI ◽  
M. BARICHE ◽  
...  
Keyword(s):  
Alien Species ◽  
Native Species ◽  
New Records ◽  
Aegean Sea ◽  
First Record ◽  
Ionian Sea ◽  
Northern Adriatic ◽  
Eastern Aegean ◽  
The Mediterranean ◽  
Mediterranean Biodiversity

The Collective Article ‘New Mediterranean Biodiversity Records’ of the Mediterranean Marine Science journal offers the means to publish biodiversity records in the Mediterranean Sea. The current article is divided in two parts, for records of native and alien species respectively. The new records of native species include: the neon flying squid Ommastrephes bartramii in Capri Island, Thyrrenian Sea; the bigeye thresher shark Alopias superciliosus in the Adriatic Sea; a juvenile basking shark Cetorhinus maximus caught off Piran (northern Adriatic); the deep-sea Messina rockfish Scorpaenodes arenai in the National Marine Park of Zakynthos (East Ionian Sea, Greece); and the oceanic puffer Lagocephalus lagocephalus in the Adriatic Sea.The new records of alien species include: the red algae Antithamnionella elegans and Palisada maris-rubri, found for the first time in Israel and Greece respectively; the green alga Codium parvulum reported from Turkey (Aegean Sea); the first record of the alien sea urchin Diadema setosum in Greece; the nudibranch Goniobranchus annulatus reported from South-Eastern Aegean Sea (Greece); the opisthobranch Melibe viridis found in Lebanon; the new records of the blue spotted cornetfish Fistularia commersonii in the Alicante coast (Eastern Spain); the alien fish Siganus luridus and Siganus rivulatus in Lipsi Island, Dodecanese (Greece); the first record of Stephanolepis diaspros from the Egadi Islands Marine Protected Area (western Sicily); a northward expansion of the alien pufferfish Torquigener flavimaculosus along the southeastern Aegean coasts of Turkey; and data on the occurrence of the Lessepsian immigrants Alepes djedaba, Lagocephalus sceleratus and Fistularia commersonii in Zakynthos Island (SE Ionian Sea, Greece).

scholarly journals Assessment of goatfish fisheries in Turkey based on the microdata set of official landing statistics

2021 ◽  
Vol 38 (3) ◽  
pp. 303-309
Author(s):  
Nuray Çelik Mavruk ◽  
Sinan Mavruk ◽  
Dursun Avşar
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Large Scale ◽  
Aegean Sea ◽  
Bottom Trawl ◽  
The Black Sea ◽  
Marmara Sea ◽  
Trawl Fishery ◽  
Red Mullet ◽  
The Mediterranean

Although goatfishes (Mullidae Rafinesque, 1815) are among the most important commercial fishes in Turkey, no research has been found investigating the characteristics and spatial patterns of goatfish fishery. Here, we assessed the goatfish fishery of Turkey based on the microdata set of Turkish National Fishery Statistics gathered by Turkish Statistical Institute (TÜİK) between 2014 and 2017. In this context, we investigated the variation of total goatfish catch by cities. In addition, we compared the contribution of small (boat <10m) and large scale (boat >10m) fishers as well as different fishing techniques to the total goatfish catch in Turkey. Finally, an evaluation was made on the discard rates recorded in the official landing statistics. The results showed that higher red mullet (Mullus barbatus Linnaeus, 1758) catch was reported in the eastern Mediterranean, whereas surmullet (Mullus surmuletus Linnaeus, 1758) catch was significantly higher in the western Black Sea. On the other hand, fishery-independent investigations revealed that the Turkish fishery fleet mostly catches red mullet throughout the coasts of Turkey. Therefore, the separate records of red mullet and surmullet in the landing statistics likely represent the local names of red mullet rather than two different species. Large scale fishers were the main source of fishery pressure in the Mediterranean Sea, the Aegean Sea and the Black Sea. However, the majority of the catch was landed by small scale fishers in the Marmara Sea. The bottom trawl fishery landed 88, 92 and 87% of total goatfish catch in the Black Sea, the Aegean Sea and the Mediterranean Sea, respectively. Purse seiners provided the largest part of total goatfish catch (40%) in the Marmara Sea, where the bottom trawl fishery is prohibited. The overall average for the discard rate was found to be 0.47%. There were no statistically significant differences among the discard rates of two species, marine regions or fishing methods.

DISTRIBUTION OF ALIEN ZOOBENTHIC SPECIES ON THE SHELF OF THE BLACK SEA

2021 ◽  
Vol 14 (4) ◽  
pp. 157-177
Author(s):  
N. N. Shalovenkov
Keyword(s):  
Statistical Analysis ◽  
Species Composition ◽  
Alien Species ◽  
Black Sea ◽  
Native Species ◽  
The Black Sea ◽  
Multivariate Statistical ◽  
Spatial Gradients ◽  
Ecological Barriers ◽  
Danube Region

The number of alien species in the zoobenthos of the Black Sea increased up to 65 species. Depending on the scale of their distribution in the Black Sea, non-native zoobenthos species are combined into three groups: 1) 5 species have spread in the entire sea, 2) 35 species were found in several areas, and 3) 25 species were found only in one of the areas of the sea. Six areas of the Black Sea shelf have been identified (Varna - Burgas, Danube, Northwestern, Crimean, Caucasian and Anatolian) in accordance with the seasonal and annual values of the thermohaline characteristics. The zoobenthos differed not only in quantity, but also in the composition of non-native species between the six areas of the shelf. The results of multivariate statistical analysis revealed a low level of similarity between these areas of the Black Sea shelf. The greatest similarity in the composition of alien species of zoobenthos was observed for the Danube region with the Varna and Burgas bays, which border each other. The species composition of the alien species of the Caucasian shelf was more similar to the Varna - Burgas and Danube areas than to the neighboring Crimean and Anatolian areas. Spatial gradients of temperature and salinity form hydrological fronts of water masses, which are a kind of ecological barriers and can limit the natural exchange of alien species between shelf areas.

scholarly journals The Activity of Ptolemy II’s Fleet in the Aegean Sea

Electrum ◽  
2020 ◽  
Vol 27 ◽  
pp. 131-148
Author(s):  
Tomasz Grabowski
Keyword(s):  
International Relations ◽  
Black Sea ◽  
Aegean Sea ◽  
Balance Of Power ◽  
The Black Sea ◽  
International Conflicts ◽  
Political Relationship ◽  
Sea Power ◽  
The Mediterranean ◽  
Naval Force

Ptolemy I, the founder of the Lagid dynasty, heavily invested in the navy and thus established the Ptolemies as a formidable sea power, his work continued by his successor Ptolemy II Philadelphus, who employed his fleet to pressure lesser powers of the Mediterranean. The following article examines the activity of Ptolemy II’s fleet in the Aegean Sea. At the end of the 270s, Ptolemy II sent a naval expedition to the Black Sea; the operation helped him establish a political relationship with Byzantion and demonstrated that maintaining a naval presence on foreign waters could influence other rulers to favor the Ptolemies. The Ptolemaic fleet under Ptolemy II Philadelphus operated in the Aegean during two major international conflicts, the Chremonidean War and the Second Syrian War. In this article I argue that the surviving evidence on the Chremonidean War indicates that Ptolemy II’s aim was not to subdue Greece or even Macedonia but to maintain the Ptolemaic hold over the Aegean with Egypt’s relatively small naval force under Patroclus. In turn, the outcome of the Second Syrian War led to a considerable weakening of the Lagids’ position in the Aegean. Ptolemy II adroitly cultivated international relations through diplomacy, propaganda, international euergetism and spreading his dynastic cult; sending the Ptolemaic fleet to patrol foreign seas constituted one crucial instrument Philadelphus could employ to shift the Mediterranean balance of power in his favor.

scholarly journals Alien species on the coasts of Turkey

2005 ◽  
Vol 6 (2) ◽  
pp. 119 ◽  
Author(s):  
M.E. CINAR ◽  
M. BILECENOGLU ◽  
B. OZTURK ◽  
T. KATAGAN ◽  
V. AYSEL
Keyword(s):  
Alien Species ◽  
Black Sea ◽  
Aegean Sea ◽  
The Black Sea ◽  
Sea Of Marmara ◽  
Levantine Sea ◽  
Pelagic Environment ◽  
Lessepsian Migration ◽  
Pelagic Ecosystems ◽  
Hard Substrata

The compilation of data on alien species reported from the Turkish coasts yielded a total of 263 species belonging to 11 systematic groups, of which Mollusca had the highest number of species (85 species), followed by Crustacea (51), fishes (43) and phytobenthos (39). The Black Sea is represented by a total of 20 alien species, the Sea of Marmara by 48 species, the Aegean Sea by 98 species and the Levantine Sea by 202 species. The majority of aliens found in the Black Sea and the Sea of Marmara were transported via shipping, whereas the Levantine coast is extensively subjected to Lessepsian migration. Benthic habitats (soft and hard substrata) comprise 76% of the total alien species and the pelagic environment is inhabited by thirty-nine species. Almost 50% of aliens collected from the Turkish coasts were found only at 0-10 m depth. Eight species occur at depths deeper than 100 m. The impacts of aliens on the benthic and pelagic ecosystems are presented.

scholarly journals Genetic divergence between the scad subspecies Trachurus Mediterraneus (Carangidae, pisces) from the Black Sea and the Mediterranean

2000 ◽  
Vol 1 (1) ◽  
pp. 133 ◽  
Author(s):  
I.S. DOBROVOLOV
Keyword(s):  
Population Structure ◽  
Isoelectric Focusing ◽  
Black Sea ◽  
Aegean Sea ◽  
The Black Sea ◽  
Sea Of Marmara ◽  
Large Form ◽  
Starch Gel ◽  
The Mediterranean ◽  
Nei's Genetic Distance

Analysis of myogen and eleven enzymes (AAT, ADH, EST, GPI, IDHP, LDH, MDH, MEP, PGDH, PGM and SOD) were carried out by using starch gel and isoelectric focusing electrophoresis on thinlayer and ultrathin polyacrylamide ampholine and servalite gels in scad species from the Black Sea, the Sea of Marmara, the Aegean Sea, and the Mediterranean. Data from electrophoretic investigations was used to clarify the population structure of the scad migrating in the Bulgarian aquatory of the Black Sea and consisting of two main subpopulations: a) a "Black Sea" one hibernating in this sea only, and b) a "Sea of Marmara" one hibernating in that sea and contiguous Black Sea regions around the Bosporus. Non-specific muscular esterases were used, because they were appropriate for identification of both subspecies: Trachurus mediterraneus ponticus Aleev and Tr.m.mediterraneus Steindachner. Nei's genetic distance (D=0,0113) was used as an indication of their isolation dated back to the Carangate Period. An attempt was made to check the hypothesis of the origin of "large" ("giant") scad in the Black Sea as a result of the heterozygotic interbreeding between Tr.m.ponticus Aleev and Tr.m.mediterraneus Steindachner. A new allele Est-1E as well as the previously known alleles Est-1A and Est-1-B, were found in Mediterranean scad Tr.m.mediterraneus caught off Nice (France). It's proposed that the presence of the large form of large scat in this area is also a consequence of the heterozytic efect from the interbreeding between a population marked by Est-1-A and Est-1-B and a population marked by Est-1-E, probably inhabiting the waters around Gibraltar in the Atlantic Ocean.

Modern diatoms of the Black Sea: invaders or indigenes?

2021 ◽  
pp. 56-60
Author(s):  
Nickolai A. Davidovich ◽  
Olga I. Davidovich
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Native Species ◽  
Salt Water ◽  
Main Issue ◽  
The Black Sea ◽  
Marine Fauna ◽  
The Mediterranean

The Black Sea basin became closed several times, which led to significant desalination, then was salted, having received a connection with the ocean. The marine fauna and flora was replaced by freshwater and vice versa. The last cardinal transformation took place at the turn of about 7–8 thousand years ago, when the Bosporus and Dardanelles strains opened, and salt water began to flow into the Black Sea basin from the Mediterranean Sea. The main issue under discussion concerns speciation and its speed – did the diatoms that penetrated the Black Sea from the Mediterranean retained genetic unity, or did their evolution lead to the formation of new (now native) species?

scholarly journals Non-native zoobenthic species at the Crimean Black Sea Coast

2017 ◽  
Vol 18 (2) ◽  
pp. 260 ◽  
Author(s):  
N. N. SHALOVENKOV
Keyword(s):  
Alien Species ◽  
Black Sea ◽  
Native Species ◽  
Benthic Communities ◽  
Abundance Ratio ◽  
The Black Sea ◽  
Dominance Index ◽  
Rhithropanopeus Harrisii ◽  
The Crimea ◽  
Taxonomic Groups

More than 40 non-native species have been registered in the zoobenthos of the Black Sea. Only, five alien species, the Crustacea, Rhithropanopeus harrisii (Gould, 1841) and Rhithropanopeus harrisii (Gould, 1841), and the Mollusca, Rapana venosa (Valenciennes, 1846), Mya arenaria (Linne, 1758) and Anadara kagoshimensis (Tokunaga, 1906), were recorded in the benthos on the Crimean shelf  between 1999-2014. The blood-cockle A. kagoshimensis had settled on many sites of the Black Sea shelf in the past forty years. The first detection (1999) at the Crimean coast and the temporal variability of this mollusc’s population coincided with the tendency in variability of the water temperature in the area.The five alien species had spatial aggregation and their occurrence did not exceed 23 % in the boundaries of the distribution sites. An increasing trend for their abundance in the last five - seven years was observed. These years were characterized by temperature rise in the surface layer of coastal waters. Similar patterns have been observed in the interannual variability of the biomass and abundance ratio of aliens to native for all zoobenthic taxonomic groups, i.e. of dominance index of alien species.The low level of the dominance index of the introduced species is indicative of low impact on the diversity of the benthic communities of the Crimea coast, i.e. on the scale of the metacommunity. With the exception of the R. venosa, they exhibited lower biomass and abundance along the Crimean coast shelf as opposed to other areas of the Black Sea shelf. Occasionally, the dominance index for the barnacle Amphibalanus improvisus (Darwin, 1854) could be high, a fact attributed to the low biomass and abundance of other benthic species.

Alien species in the fauna of the Black Sea (Chornomorskyi) Biosphere Reserve

Geo&Bio ◽  
2019 ◽  
Vol 2019 (17) ◽  
pp. 48-61
Author(s):  
Dariya Korolesova ◽  
◽  
Yurii Moskalenko ◽  
Maria Nitochko ◽  
Zoya Selyunina ◽  
...  
Keyword(s):  
Alien Species ◽  
Black Sea ◽  
Biosphere Reserve ◽  
The Black Sea

ON THE EXOTIC HYDROBIONTS SPECIES INTRODUCTION INTO THE BLACK SEA WITH THE BALLAST WATERS

2005 ◽  
Vol 1 (3) ◽  
pp. 36-42
Author(s):  
A.R. Boltachev ◽  
◽  
Yu.A. Zagorodnyaya ◽  
N.A. Boltacheva ◽  
E.A. Kolesnikova ◽  
...  
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Species Introduction ◽  
Ballast Waters
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