Morphometric comparison of the narrow-clawed crayfish Pontastacus leptodactylus populations from the western part of the Polesye Region

Taxonomical status of the narrow-clawed crayfish species complex is remained as unclear and it is still the subject of discussion. Despite many ambiguities, uniform data related to morphological diversity are scare. Therefore, the main aim was to compare populations from the same type of waterbody and different drainage (Baltic and Black Sea) from the Polesye region with multivariate statistics in order to morphological diversity verification. The result indicates that variability of studied populations is expressed especially in abdomen and cephalothorax parameters which is comparable to other works on morphometry of the European freshwater crayfish species. Some studies showed differences on morphology have been also confirmed at the genetic level. The information obtained in this study indicates that genetic analyses are necessary for understanding the diversity of this species.

Download Full-text

Genetic and morphological evidence for substantial hidden biodiversity in a freshwater crayfish species complex

Molecular Phylogenetics and Evolution ◽

10.1016/j.ympev.2008.02.006 ◽

2008 ◽

Vol 48 (1) ◽

pp. 126-135 ◽

Cited By ~ 38

Author(s):

Lauren M. Mathews ◽

Luke Adams ◽

Erica Anderson ◽

Matthew Basile ◽

Elizabeth Gottardi ◽

...

Keyword(s):

Species Complex ◽

Morphological Evidence ◽

Freshwater Crayfish ◽

Crayfish Species

Download Full-text

Identification of sibling species in the genus Eucyclops from water-bodies of Ukraine and Russia using crossbreeding studies

Ecology and Noospherology ◽

10.15421/031406 ◽

2014 ◽

Vol 25 (1-2) ◽

pp. 61-68 ◽

Cited By ~ 1

Author(s):

V. I. Monchenko ◽

L. P. Gaponova ◽

V. R. Alekseev

Keyword(s):

Cryptic Species ◽

River Basin ◽

Black Sea ◽

Species Complex ◽

River Basins ◽

Water Bodies ◽

Similar Species ◽

Basin Water ◽

Different Populations ◽

Baltic Sea Basin

Crossbreeding experiments were used to estimate cryptic species in water bodies of Ukraine and Russia because the most useful criterion in species independence is reproductive isolation. The problem of cryptic species in the genus Eucyclops was examined using interpopulation crosses of populations collected from Baltic Sea basin (pond of Strelka river basin) and Black Sea basin (water-reservoires of Dnieper, Dniester and Danube rivers basins). The results of reciprocal crosses in Eucyclops serrulatus-group are shown that E. serrulatus from different populations but from water bodies belonging to the same river basin crossed each others successfully. The interpopulation crosses of E. serrulatus populations collected from different river basins (Dnipro, Danube and Dniester river basins) were sterile. In this group of experiments we assigned evidence of sterility to four categories: 1) incomplete copulation or absence of copulation; 2) nonviable eggs; 3) absence of egg membranes or egg sacs 4) empty egg membranes. These crossbreeding studies suggest the presence of cryptic species in the E. serrulatus inhabiting ecologically different populations in many parts of its range. The same crossbreeding experiments were carries out between Eucyclops serrulatus and morphological similar species – Eucyclops macruroides from Baltic and Black Sea basins. The reciprocal crossings between these two species were sterile. Thus taxonomic heterogeneity among species of genus Eucyclops lower in E. macruroides than in E. serrulatus. The interpopulation crosses of E. macruroides populations collected from distant part of range were fertile. These crossbreeding studies suggest that E. macruroides species complex was evaluated as more stable than E. serrulatus species complex.

Download Full-text

The referendum as an institution in the Black Sea Region: Does it signal the rise or collapse of democracy?

Rocznik Instytutu Europy Środkowo-Wschodniej ◽

10.36874/riesw.2019.4.8 ◽

2019 ◽

Vol 17 (4) ◽

pp. 161-185

Author(s):

Małgorzata Podolak

Keyword(s):

Black Sea ◽

Direct Democracy ◽

The Black Sea ◽

Moral Issues ◽

Black Sea Region ◽

Positive Effects ◽

The Subject ◽

Democratic Systems ◽

Important State ◽

Constitutional Changes

Views on the institution of direct democracy have changed during the period of democratic transition. The various advantages and positive effects of direct democracy have been confirmed by the practice of some democratic countries. Its educational and political activation value for society was also noted, without which civil society cannot form. The referendum is especially treated as the purest form of correlation between the views of society and the decisions of its representatives. In a situation where two representative bodies are present – the parliament and the president – a referendum is considered a means of resolving disputes between them in important state affairs. The referendum is nowadays becoming more than just a binding or consultative opinion on a legislative act, especially a constitution. First and foremost, it is important to see the extension of the type and scope of issues that are subject to direct voting. Apart from the traditional, i.e., constitutional changes, polarising issues that raise considerable emotion have become the subject of referenda. Problems of this type include, in particular, moral issues, membership in international organisations, and so-called ‘New Policy’. This article presents the role and importance of the referendum as an institution shaping the democratic systems of the Black Sea Region.

Download Full-text

Synagogue as Infrastructure in Everyday Life of Batumi Jewish Community

Journal of Religion in Europe ◽

10.1163/18748929-bja10056 ◽

2021 ◽

Vol 14 (3-4) ◽

pp. 323-338

Author(s):

Nino Abakelia

Keyword(s):

Everyday Life ◽

Jewish Community ◽

Black Sea ◽

The Black Sea ◽

Culturally Specific ◽

Sacred Place ◽

Black Sea Region ◽

The Subject ◽

Ethnographic Data ◽

And Function

Abstract The subject under scrutiny is Sephardic and Ashkenazi synagogues in Batumi (the Black Sea Region of Georgia) that reveal both universal and culturally specific forms. The paper is based on ethnographic data gathered during fieldwork in Batumi, in 2019, and on the theoretical postulates of anthropology of infrastructure. The article argues that the Batumi synagogues could be viewed and understood as ‘infrastructure’ in their own right, as they serve as objects through which other objects, people, and ideas operate and function as a system. The paper attempts to demonstrate how the sacred edifices change their trajectory according to modern conditions and how the sacred place is inserted and coexists inside a network of touristic infrastructure.

Download Full-text

Evidence for multiple paternity in two species of Orconectes crayfish

Canadian Journal of Zoology ◽

10.1139/cjz-2014-0132 ◽

2014 ◽

Vol 92 (11) ◽

pp. 985-988 ◽

Cited By ~ 6

Author(s):

A.F. Kahrl ◽

R.H. Laushman ◽

A.J. Roles

Keyword(s):

Genetic Variation ◽

Life History ◽

Multiple Mating ◽

Natural Populations ◽

Multiple Paternity ◽

The Body ◽

Freshwater Crayfish ◽

Decapod Crustaceans ◽

Freshwater Habitats ◽

Crayfish Species

Multiple mating is expected to be common in organisms that produce large clutches as a mechanism by which sexual reproduction can enrich genetic variation. For freshwater crayfish, observation of multiple mating suggests the potential for high rates of multiple paternity, but genetic confirmation is largely lacking from natural populations. We studied paternity within wild-caught broods of two crayfish species in the genus Orconectes (Sanborn’s crayfish (Orconectes sanbornii (Faxon, 1884)) and the Allegheny crayfish (Orconectes obscurus (Hagen, 1870))). Although females have been observed mating with multiple males, this is the first genetic confirmation of multiple paternity in broods of these two species. Berried females were collected in the field and maintained in aquaria until their eggs hatched. We amplified and genotyped extracted DNA from maternal and hatchling tissue for several microsatellite loci. For both species, paternity reconstruction (GERUD 2.0) yielded 2–3 sires per brood and no single paternity clutches. We discuss these results from natural populations in light of the body of work on reproductive ecology of decapod crustaceans and in the context of changes in life history following the transition from marine to freshwater habitats.

Download Full-text

Genetic analyses reveal further cryptic lineages within the Myotis nattereri species complex

Mammalian Biology ◽

10.1016/j.mambio.2011.11.004 ◽

2012 ◽

Vol 77 (3) ◽

pp. 224-228 ◽

Cited By ~ 37

Author(s):

Sébastien J. Puechmaille ◽

Benjamin Allegrini ◽

Emma S.M. Boston ◽

Marie-Jo Dubourg-Savage ◽

Allowen Evin ◽

...

Keyword(s):

Species Complex ◽

Genetic Analyses ◽

Myotis Nattereri

Download Full-text

Epifauna of native and alien freshwater crayfish species (Crustacea:Decapoda): a host-specific community?

Freshwater Science ◽

10.1086/698764 ◽

2018 ◽

Vol 37 (3) ◽

pp. 593-604 ◽

Cited By ~ 2

Author(s):

Tvrtko Dražina ◽

Ana Korša ◽

Maria Špoljar ◽

Ivana Maguire ◽

Göran I. V. Klobučar

Keyword(s):

Freshwater Crayfish ◽

Specific Community ◽

Crayfish Species

Download Full-text

The potential of antimicrobial peptides isolated from freshwater crayfish species in new drug development: A review

Developmental & Comparative Immunology ◽

10.1016/j.dci.2021.104258 ◽

2022 ◽

Vol 126 ◽

pp. 104258

Author(s):

Diletta Punginelli ◽

Domenico Schillaci ◽

Manuela Mauro ◽

Alan Deidun ◽

Giampaolo Barone ◽

...

Keyword(s):

Drug Development ◽

Antimicrobial Peptides ◽

Freshwater Crayfish ◽

New Drug ◽

New Drug Development ◽

Crayfish Species

Download Full-text

The earliest Greek settlements on the Black Sea

The Journal of Hellenic Studies ◽

10.2307/631221 ◽

1976 ◽

Vol 96 ◽

pp. 18-31 ◽

Cited By ~ 21

Author(s):

Robert Drews

Keyword(s):

Black Sea ◽

Great Majority ◽

Seventh Century ◽

The Black Sea ◽

Archaeological Evidence ◽

The Subject

The date and circumstances of the first Greek settlements on the Black Sea are matters of considerable disagreement. This is the result both of the scattered nature of the literary evidence on the subject, and of the dearth of archaeological evidence for Pontic settlements other than those on the western and northern shores. A century ago it was commonly thought that although the great majority of colonies were sent out in the seventh and sixth centuries, Trapezus and Sinope, as our sources say or imply, were founded in the middle of the eighth. For a variety of reasons, among them an increased reliance on archaeologically secured dates, this view went out of favour, and opinion inclined toward the view that the Greeks did not enter the Black Sea at all until after 700. This view was both expressed in and supported by Rhys Carpenter's thesis that not until the penteconter was invented (an invention which he dated to the early seventh century) could the Greeks make head against the four-knot current which flows through the Bosporus from the Black Sea. Articles by B. W. Labaree and A. J. Graham, however, have undermined Carpenter's argument, and it is now once again not unusual to find references to Greek activity in the Black Sea before 700.

Download Full-text