Naturalization of the Pacific Chameleon Goby Tridentiger trigonocephalus (Perciformes, Gobiidae) in the Black Sea (Crimea, Sevastopol Gulf)

2010 ◽  
Vol 50 (2) ◽  
pp. 188-196 ◽  
Author(s):  
A. R. Boltachev ◽  
E. P. Karpova
Keyword(s):  
2018 ◽  
Vol 54 (12) ◽  
pp. 1445-1451
Author(s):  
Yu. V. Slynko ◽  
E. E. Slynko ◽  
A. V. Pirkova ◽  
L. V. Ladygina ◽  
V. I. Ryabushko

2021 ◽  
Vol 6 (1) ◽  
pp. 17-33
Author(s):  
А. Ю. Звягинцев ◽  
С. И. Масленников ◽  
А. К. Цветников ◽  
А. А. Бегун ◽  
Н. И. Григорьева

The number of mollusc farms off the coast of Crimea and the Caucasus has increased significantly in recent years. The cultivation of the Pacific oyster Crassostrea gigas (Thunberg, 1793) requires monitoring of mollusc health and parasitological control of mariculture farms. The aim of this work was to study species composition of epibionts and endobionts, associated with shells of cultivated oyster C. gigas, as well as to identify species, damaging shells. Commercial oysters with visual shell damage were collected on a mariculture farm in the Donuzlav Bay (Crimea, the Black Sea) and brought to the laboratory alive chilled. As a result of 22 oysters’ examination, 14 macrozoobenthos species and live specimens of rock-boring mollusc Petricola lithophaga (Retzius, 1788) were found. The size of rock-borers varied 9 to 16 mm; their age was about two years. Prolonged presence of P. lithophaga inside oyster valves can cause degradation of shell calcareous layer and even death of the mollusc host; this fact is of great importance for the Black Sea mariculture. Considering P. lithophaga annual development cycle, during the period of mass larval settlement (July to October), it is recommended to inspect the shells of cultivated oysters. Further detailed studies will allow to develop measures for prevention and protection of bivalve molluscs from infestation with P. lithophaga.


Parasite ◽  
2020 ◽  
Vol 27 ◽  
pp. 48 ◽  
Author(s):  
Omar M. Amin ◽  
Meysam Sharifdini ◽  
Richard A. Heckmann ◽  
Nataliya Rubtsova ◽  
Halima Jmii Chine

We recognize four species in the Neoechinorhynchus agilis complex. We studied specimens of Neoechinorhynchus (Hebesoma) personatus Tkach, Sarabeev & Shvetsova, 2014 from Mugil cephalus in the Mediterranean Sea off Tunisia and in the Black Sea, and also specimens of Neoechinorhynchus ponticus n. sp. from Chelon auratus Risso in the Black Sea. Specimens from M. cephalus at both locations were similar. All structures of N. ponticus n. sp. were considerably smaller than those of N. personatus. Two other species of the N. agilis complex are recognized: Neoechinorhynchus agilis (Rudolphi, 1819) sensu stricto from various hosts in the Atlantic and the Mediterranean, and Neoechinorhynchus yamagutii Tkach, Sarabeev & Shvetsova, 2014 from M. cephalus and Planiliza haematocheila in the Pacific, especially the Sea of Japan. Neoechinorhynchus dimorphospinus Amin & Sey, 1996 from marine fish in the Persian Gulf and the Pacific Ocean off Vietnam may be a candidate for membership in the N. agilis complex. X-ray scans of gallium cut and intact hooks of N. personatus and N. ponticus showed differences in the mineral content of hooks with higher sulfur levels in smaller hooks and in hooks from specimens in the Black Sea compared to specimens from the Mediterranean. The relatively high genetic differences between N. ponticus n. sp. and other species of Neoechinorhynchus using a partial 18S rDNA dataset support its independent status. Neoechinorhynchus ponticus n. sp. and N. personatus have a common ancestor with species of Neoechinorhynchus collected from saltwater fish.


2021 ◽  
Author(s):  
Ana-Maria Krapa ◽  
◽  
Elena Buhaciuc-Ionita ◽  
Marian Ionita ◽  
Elena Iulia Iorgu ◽  
...  

The current climate changes are having a significant impact on species distribution. While some species are affected, others are thriving in these new conditions, expanding their range. This is also the case of some invasive species who seem to benefit from these changes. The invasive Pacific oyster Magallana gigas is among these species. The current situation of the Pacific oyster in the Black Sea is discussed, with new data from the Romanian waters.


Author(s):  
Martine Robbeets ◽  
Alexander Savelyev

The Transeurasian languages are among the most fervently debated language families in modern linguistics, their data contributing extensively to our current understanding of how genealogical and areal linguistics can complement each other as twin faces of diachronic linguistics. The term “Transeurasian” refers to a large group of geographically adjacent languages, stretching from the Pacific in the East to the Baltic, the Black Sea, and the Mediterranean in the West, that includes up to five uncontroversial linguistic families: Japonic, Koreanic, Tungusic, Mongolic, and Turkic. It is distinguished from the more traditional term “Altaic,” which we here reserve for the linguistic grouping consisting of Tungusic, Mongolic, and Turkic languages only. Figure 1 displays the distribution of the Transeurasian languages....


2021 ◽  
Vol 6 (1) ◽  
pp. 34-40
Author(s):  
M. A. Kovalyova ◽  
O. Yu. Vyalova

The number of mollusc farms off the coast of Crimea and the Caucasus has increased significantly in recent years. The cultivation of the Pacific oyster Crassostrea gigas (Thunberg, 1793) requires monitoring of mollusc health and parasitological control of mariculture farms. The aim of this work was to study species composition of epibionts and endobionts, associated with shells of cultivated oyster C. gigas, as well as to identify species, damaging shells. Commercial oysters with visual shell damage were collected on a mariculture farm in the Donuzlav Bay (Crimea, the Black Sea) and brought to the laboratory alive chilled. As a result of 22 oysters’ examination, 14 macrozoobenthos species and live specimens of rock-boring mollusc Petricola lithophaga (Retzius, 1788) were found. The size of rock-borers varied 9 to 16 mm; their age was about two years. Prolonged presence of P. lithophaga inside oyster valves can cause degradation of shell calcareous layer and even death of the mollusc host; this fact is of great importance for the Black Sea mariculture. Considering P. lithophaga annual development cycle, during the period of mass larval settlement (July to October), it is recommended to inspect the shells of cultivated oysters. Further detailed studies will allow to develop measures for prevention and protection of bivalve molluscs from infestation with P. lithophaga.


2020 ◽  
pp. 26-30
Author(s):  
Е.Е. Слынько ◽  
Ю.В. Слынько

В настоящее время в мирихозяйствах Чёрного моря интенсивно выращиваются три вида двустворчатых моллюсков: тихоокеанская, или гигантская, устрица (Crassostrea gigas, (Thunberg, 1793)), интродуцированная из Дальневосточных морей, и два вида аборигенов – мидия (Mytillus galloprovincialis Lamarck, 1819) и средиземноморский гребешок (Flexopecten glaber (Linnaeus, 1758)). В отношении всех трёх видов выявляются две основные проблемы – точное установление таксономического разнообразия и тенденции в изменениях генетического разнообразия. Все проанализированные устрицы из черноморского питомника могут быть отнесены к виду Crassostrea gigas. В исследованных гаплотипах C. gigas по генам COI и 16S mtDNA обнаруживаются особи, специфические как для Атлантики, так и для Тихого океана. Среди гаплотипов COI mtDNA из питомника Института биологии южных морей (ИнБЮМ) выявлен ранее не известный гаплотип (MF663324), который является специфическим для Крымской популяции культивируемых C. gigas. Нуклеотидные последовательности фрагмента гена COI у исследуемых особей мидий Чёрного моря при соотношении с последовательностями M. edulis и M. trossulus формировали общую филогенетическую группу, отличающуюся от M. californuanus. Это позволяет уверенно отнести исследованных нами особей к комплексу «голубой мидии». Все изученные экземпляры гребешка из заливов озера Донузлав были идентифицированы по гену 16S как вид Flexopecten glaber и одновременно как вид F. proteus. Если экземпляры из Донузлава имели р-расстояние от F. glaber 0.2%, то от F. proteus – 0.1%. Это свидетельствует о том, что виды F. glaber и F. proteus входят в один таксономический комплекс и являются таксономическими синонимами. Таким образом, в Чёрном море обитают следующие виды двустворчатых моллюсков: Crassostrea gigas, Mytillus galloprovincialis и Flexopecten glaber. Все они характеризуются существенным падением гаплотипического разнообразия, а чужеродный вид – тихоокеанская устрица – ещё и снижением нуклеотидного разнообразия. Currently, three species of bivalved mollusks are intensively grown in the Black Sea world farms: Pacific or giant, oyster (Crassostrea gigas, (Thunberg, 1793)) introduced from the Far Eastern Seas and two autochthonous species – mussel (Mytillus galloprovincialis Lamarck, 1819) and Mediterranean fan shell (Flexopecten glaber (Linnaeus, 1758)). In relation to all three species two main problems are identified – the exact establishment of taxonomic diversity and the trends in changes in genetic diversity. All analyzed oysters from the Black Sea fish hatchery can be assigned to the species Crassostrea gigas. In the studied C. gigas haplotypes individuals specific to both the Atlantic and the Pacific Ocean are found by COI and 16S mtDNA genes. Among the haplotypes of COI mtDNA from the fish hatchery of the Institute of Biology of the Southern Seas (IBSS) a previously unknown haplotype (MF663324) was identified which is specific to the Crimean population of cultured C. gigas. Nucleotide sequences of a fragment of the COI gene in the individuals of Black Sea mussels under investigation at a ratio with the sequences M. edulis and M. trossulus formed a common phylogenetic group different from M. californuanus. This allows us to confidently attribute the studied individuals to the blue mussel complex. All studied scallop specimens from Lake Donuzlav bays were identified by the gene 16S as a species of Flexopecten glaber and simultaneously as a species of F. proteus. If the Donuzlav specimens had a p-distance from F. glaber of 0.2%, then from F. proteus – 0.1%. This indicates that the species F. glaber and F. proteus are part of the same taxonomic complex and are taxonomic synonyms. Thus, the following species of bivalve mollusks live in the Black Sea: Crassostrea gigas, Mytillus galloprovincialis and Flexopecten glaber. All of them are characterized by a significant drop in haplotypic diversity and an alien species – the Pacific oyster – also a decrease in nucleotide diversity.


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