Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 6

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: European Russia

Sortuj według:

Ogranicz wyniki do:

Diatoms as indicators of soil conditions in oil production regions

100%

Dorokhova M. F.

Oceanological and Hydrobiological Studies

2007

tom 36

nr Suppl.1

The diversity of chromosome races in Sorex araneus from European Russia

84%

Bulatova N. , Searle J. B. , Bystrakova N. , Nadjafova R. , Shchipanov N. , Orlov V.

Acta Theriologica. Supplement

2000

tom 45

nr 1

Chromosome studies on common shrews from Northern and central parts of European Russia

84%

Kozlovsky A. , Orlov V. , Okulova N. , Kovalskaya J. , Searle J. B.

Acta Theriologica. Supplement

2000

tom 45

nr 1

Detailed biostratigraphy of the Middle Callovian – lowest Oxfordian in the Mikhaylov reference section (Ryazan region, European part of Russia) by ammonites

67%

Kiselev D. N. , Rogov M. A.

Volumina Jurassica

2018

tom Vol. 16, no 1

73--186

Study of the sections near the Mikhaylov (Ryazan region) has made it possible to improve the infrazonal subdivision of the Middle Callovian – Lower Oxfordian of the European Russia by ammonites. The Athleta Zone is the most complete in the studied sections. A sequence of kosmoceratid biohorizons (phaeinum, proniae, rowlstonense and kuklikum) is established here, as well as infrazonal units based on a phylogenetic sequence of species of the genus Funiferites. A study of the paleobiodiversity and frequency of occurrence of ammonites at different intervals of the section showed that the ammonite assemblages of the Athleta Zone are Sub-Boreal or Sub-Tethyan, while in the Lamberti Zone they are Boreal, and in the Lower Oxfordian they are Arctic. It is also shown that the change in ammonite composition in the sections coincides with the cycles of transgressions and regressions of Boreal basins. New species and subspecies of the ammonites Funiferites allae compressum, Cadoceras (Eichwaldiceras) intermedium, Brightia (B.) lominadzei, B. (B.) progzhellensis, B. (B.) eccentrtica, B. (Glyptia) canaliculata stankevitchae, Zieteniceras rarecostatum are described.

A hybrid zone between the Kirillov and Petchora chromosomal races of the common shrew (Sorex araneus L., 1758) in northeastern European Russia: a preliminary description

67%

Pavlova S. V. , Shchipanov N. A.

tom 59

nr 3

Karyotypes of the Petchora and Kirillov chromosomal races of the common shrew differ by six Robertsonian metacentrics with monobrachial homology, such that interracial F1 hybrids produce a ring-of-six configuration at meiosis I and are expected to suffer infertility. Mapping of 52 karyotyped individuals by using a unique global positioning system (GPS) revealed that the Kirillov-Petchora hybrid zone is positioned close to the river Mezen, which separated these races, and so may limit the migration of shrews across the contact zone. Although the population density of shrews was found to be markedly different with respect to habitats, the zone runs through a mosaic of habitats that are similar for both the Petchora and the Kirillov sides. This is one of the narrowest chromosomal hybrid zones among those studied in Sorex araneus with a standard cline width of about 1 km. The center of the cline is located on a bank occupied by the Petchora race at a distance of 0.4 km away from a riverine barrier. Interestingly, both the Kirillov race and hybrid individuals were found on a small island in the middle of a river fully flooded each spring. The frequencies of karyotypic variants allow us to consider the zone as an example of a bimodal zone. New Robertsonian and de novo whole-arm reciprocal translocations (WART) chromosomal variants found in the zone could be regarded as evidences of current evolutionary process in chromosomal hybrid zones.

The first record of Late Miocene bat from European Russia

67%

Rossina V. V. , Kruskop S. V. , Tesakov A. S. , Titov V. V.

Acta Zoologica Cracoviensia. Ser.A Vertebrata

2006

tom 49A

nr 1-2