scholarly journals The specific features of the reproductive biology of the rare species Gueldenstaedtia monophilla Fisch. (Fabaceae)

2021 ◽  
Vol 38 ◽  
pp. 00111
Author(s):  
Inessa Selyutina ◽  
Elena Konichenko ◽  
Natalia Igay ◽  
Davaajav Darikhand
Keyword(s):  
Seed Production ◽  
Reproductive Biology ◽  
Rare Species ◽  
The Real ◽  
Central Altai ◽  
The North ◽  
North Western

The seed production of the rare species Gueldenstaedtia monophylla has been investigated in 19 coenotic populations in the territories of Russia (Central Altai) and Mongolia (the north-western part). G. monophylla reproduces exclusively by seeds and is characterized by the low number and density of the plants in the populations. Its populations have a high proportion of generative plants: from 31 to 84% from the total number of the plants. The plants of G. monophylla have a small number of generative shoots, varying from 1 to 6 per plant. The number of flowers on the plants is low, too, and varies in the populations on average from 1.2 to 15.3 per plant. The potential seed production (PSP) varies considerably from 13.5 to 308.6 ovules per plant. The real seed production is much lower, to constitute from 6.2 to 74.5 seeds per plant. The low seed production, fructification that occurs not every year, and scanty populations make the species vulnerable.

scholarly journals To the distribution of noctuid moths (Lepidoptera: Noctuoidea) in the North-Western Pryazovia and adjacent regions of the steppe zone of Ukraine

2019 ◽  
Vol 27 (2) ◽  
pp. 23-33
Author(s):  
S. I. Suchkov ◽  
Yu. M. Geryak
Keyword(s):  
Rare Species ◽  
New Records ◽  
Steppe Zone ◽  
The North ◽  
Clostera Anastomosis ◽  
New Localities ◽  
First Time ◽  
North Western

The new records of 94 species of noctuid moths (Noctuoidea) in the North-Western Pryazovia and adjacent regions of the steppe zone of Ukraine are presented. One species Dysgonia rogenhoferi is recorded in Ukraine for the first time. Founds of species Eublemma amasina and Caradrina expansa are the second in our country. One species (Eublemma amasina) in Dnipro Region, 2 (Ptilophora plumigera and Schargacucullia gozmanyi) — in Donetsk Region, 2 (Cerura erminea and Apamea unanimus) — in Odesa Region, 5 (Acantholipes regularis, Dysgonia rogenhoferi, Caradrina expansa, Luperina rubella, and Aporophyla canescens) — in Zaporizhzhya Region, 7 (Clostera anastomosis, Zanclognatha lunalis, Polyphaenis sericata, Protarchanara brevilinea, Aporophyla canescens, Lacanobia praedita, and Dichagyris forcipula) — in Kherson Region, and 10 (Clostera anastomosis, Cucullia argentina, Meganephria bimaculosa, Hoplodrina blanda, Sedina buettneri, Tiliacea aurago, Cosmia diffinis, Cosmia affinis, Aporophyla lutulenta and Xestia trifida) — in Mykolaiv Region are registered for the first time. In addition, new localities of a number of little-known, local and rare species in Ukraine or in its separate regions were discovered.

scholarly journals Species composition of algae small rivers of the North-Western Black Sea region

Algologia ◽  
2020 ◽  
Vol 30 (4) ◽  
pp. 406-420
Author(s):  
O.M. Mironyuk ◽  
◽  
F.P. Tkachenko ◽  
Keyword(s):  
Black Sea ◽  
Rare Species ◽  
Floristic Composition ◽  
Hydrological Regime ◽  
Small Rivers ◽  
Taxonomic Structure ◽  
Black Sea Region ◽  
The North ◽  
Short Period ◽  
North Western

The article presents the results of research on the species diversity of algae of small steppe rivers of the north-western Black Sea coast (NWBS). These are the rivers of Kohylnyk, Chaha, Sarata, Hadjider, Kuchurhan, Yahorlyk, Baraboy, Veliky Kuyalnik, Maly Kuyalnik, Kodyma, Tylihul, Tsarehol, Chichikleya. A total of 329 species (340 infraspecific taxa) of algae belonging to 8 divisions (Bacillariophyta, Cyanobacteria, Chlorophyta, Euglenozoa, Ochrophyta, Charophyta, Dinophyta and Rhodophyta) were identified. The basis of the taxonomic structure of reservoirs are representatives of Bacillariophyta (40%), Cyanobacteria and Chlorophyta (17% each), Charophyta (10.5%), Euglenozoa (10.2%). The total share of other departments is 4.1%. The Tylihul River had the most diverse composition of algae. It is one of the largest small rivers in the region, which dries up every year for a short period. According to the Sørensen-Chekanovsky coefficient, the greatest degree of similarity of the floristic composition of algae was established by pairwise comparison of the rivers of Sarata–Kohylnyk (0.614), Sarata–Hadjider (0.544), and Kohylnyk–Hadjider (0.517). These reservoirs are located in the Danube–Dniester interfluve, have almost the same mineralization and a similar hydrological regime. Among the identified algae species, only 12 are common to all studied rivers. New records for the NWBS were Peranema pleururum Skuja, Phacus platyaulax Pochmann, Monomorphina pyrum (Ehrenberg) Mereschkowsky and Euglena van-goori Deflandre. A rare species Spirulina flavovirens Wisl. was found in in the Kohylnyk River. Anabaena bergii Ostenfeld, Phacus alatus G.A.Klebs, Monomorphina pyrum, Pleurosira laevis (Ehrenberg) Compère, Campylodiscus bicostatus Smith ex Roper, Closterium dianae Ehrenb. ex Ralfs and Batrachospermum gelatinosum (Linnaeus) De Candolle are regionally rare species. In the ecological aspect, the waters of the studied small rivers can be characterized as brackish, poorly flowing, and alkaline. According to the level of organic pollution, they correspond to the β-mesosaprobic zone.

scholarly journals The Early Sarmatian Sites of the Orel-Samara Interfluve

2019 ◽  
pp. 81-96
Author(s):  
Аleksandr Symonenko
Keyword(s):  
Objective Analysis ◽  
The Real ◽  
Funeral Rite ◽  
The North ◽  
Cone Type ◽  
North Western ◽  
Catacomb Culture ◽  
Northern Sector

The paper critically analyzes the burials of the Orel-Samara interfluve published as the early Sarmatian assemblages. Due to wrongly determined ceramics and confusion in numbering of barrows and other subjective reasons they were interpreted and dated incorrectly. The paper offers the objective analysis of the sites under discussion and their real dating. The collection of Dr. Kostenko presents two burials (Spasskoye-Verkhnyaya Maevka, Pereshchepino) belonging to Belozerka culture, one (Novo-Podkryazh) belonging to Catacomb culture, several Sarmatian burials (Podgorodnoye, Aleksandrovka, Sokolovo), which were dated incorrectly (they belong to the later period in fact). In general, only 10 burials of the region can be dated to the 2nd – 1st centuries BC out of 22, which are considered early Sarmatian. These are the burials with Middle La Tиne fibulae (Zhemchuzhnoe, Bogdanovka, Lychkovo), mirrors of early types (Sokolovo, Proletarskoe) and the swords with crescent pommel (Zhemchuzhnoe, Terny, Preobrazhenka), with early Sarmatian ceramics (Kolpakovka). The “hoard” from Bulakhivka with silver bowls of the “real cone” type, phalerae and the cauldron of early shape also belongs to this time. According to the funeral rite and burial goods they indeed do not differ from the whole massif of the North Pontic region burials. These are inserted burials oriented mainly in the northern sector. The Orel-Samara interfluve was the north-western periphery of the Rhoxolans lands.

scholarly journals A contribution to distribution of genus Stagnicola and Catascopia (Gastropoda: Lymnaeidae) in the Czech Republic

2008 ◽  
Vol 7 ◽  
pp. 70-73
Author(s):  
Luboš Beran
Keyword(s):  
Czech Republic ◽  
Rare Species ◽  
The Czech Republic ◽  
The North ◽  
North Western

This paper brings a contribution to the distribution of genus Stagnicola Jeffreys, 1830 and Catascopia Meier-Brook & Bargues, 2002 in the Czech Republic. Occurrence of four species has been confirmed in the Czech Republic so far. Two species – Stagnicola corvus (Gmelin, 1791) and S. palustris (O.F. Müller, 1774) (including S. turricula (Held, 1836)), are widespread and common especially in lowlands along bigger rivers (Labe, Ohře, Morava, Dyje, Odra). Occurrence of S. fuscus (Pfeiffer, 1821) is restricted to the territory of the north-western part of Bohemia and Catascopia occulta (Jackiewicz, 1959) is a rare species with only two known sites.

Population structure and aspects of the reproductive biology of the blackmouth catshark, Galeus melastomus Rafinesque, 1810 (Chondrichthyes: Scyliorhinidae) caught accidentally off the Greek coasts

2016 ◽  
Vol 98 (4) ◽  
pp. 909-925
Author(s):  
Christoforos Panicos Metochis ◽  
Greta Carmona-Antoñanzas ◽  
Vasiliki Kousteni ◽  
Dimitrios Damalas ◽  
Persefoni Megalofonou
Keyword(s):  
Logistic Regression ◽  
Population Structure ◽  
Reproductive Biology ◽  
Eastern Mediterranean ◽  
Maturity Stage ◽  
Population Composition ◽  
Egg Capsules ◽  
The North ◽  
Different Seasons ◽  
North Western

The population composition and aspects of the reproductive biology of 452 blackmouth catsharks, Galeus melastomus were investigated. The sharks were incidentally caught off the North-Western Aegean, the Eastern Corinthian and Northern Euboean Gulfs by commercial bottom trawlers and longlines at depths between 200 and 500 m. The overall sex ratio (1:1.1 females:males) was not different from the theoretical unit (1:1). No differences in the sex ratios were detected among seasons, areas or depth strata. Significant differences in the population structure regarding different maturity stage proportions at different seasons, fishing areas and depths, were observed. The sampled population mainly consisted of immature catsharks (77%), predominantly trawled off the NW Aegean and Corinthian Gulf during winter and autumn. Fifteen per cent of the samples, mainly captured in spring and summer off the N Euboean Gulf, were mature. Eight per cent of the specimens was found to be maturing. Higher frequencies of heavier female individuals were observed. Based on the maturation ogives and the total lengths (TL) for each sex, using logistic regression which presented sex-related differences, male Galeus melastomus achieved maturity at 433.6 mm while females at 483.5 mm. The number of egg capsules in the oviducts spanned from 1–12 per female with sizes varying from 38 × 14 mm to 55 × 20 mm. This is the first study investigating the demography and aspects of Galeus melastomus reproduction in the Eastern Mediterranean.

A new, rare species of Brachychiton from Fish River Station, Northern Territory

2014 ◽  
Vol 27 (6) ◽  
pp. 462 ◽  
Author(s):  
Ian D. Cowie ◽  
Gordon P. Guymer
Keyword(s):  
New Species ◽  
Rare Species ◽  
Conservation Status ◽  
Northern Territory ◽  
The North ◽  
North Western ◽  
A New Species

Brachychiton chrysocarpus Cowie & Guymer from Fish River Station in the north-western part of the Northern Territory is described as a new species. It is compared with B. tuberculatus Guymer and B. xanthophyllus Guymer, but differs especially in the softer finer indumentum, shorter caducous stipules, slender paniculate, open inflorescence, the weakly tuberculate follicles and other characters. It appears to be restricted to Eucalyptus tectifica woodland on slopes of ~17° associated with ferruginous sandstone of the Waterbag Creek formation. Its conservation status is discussed and assessed.

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