STRUCTURE OF FISH POPULATION OF THE BAIDARATAYAHA RIVER'S BASIN

2017 ◽  
pp. 33-44 ◽  
Author(s):  
Vladimir Dmitrievich Bogdanov ◽  
Elena Nikolaevna Bogdanova ◽  
Yan Albertovich Kizhevatov ◽  
Irina Pavlovna Melnichenko
Keyword(s):  
Species Diversity ◽  
Pink Salmon ◽  
Fish Population ◽  
Kara Sea ◽  
Arctic Char ◽  
The Other ◽  
Fish Populations ◽  
Deep Lakes ◽  
First Time ◽  
Fish Productivity

The data of studies of fish populations in the basin of the Baidaratayakha river, received in 1998, 2002, 2013, 2014 are summarized for the first time. 18 species of fish are noted. Most of them belong to commercial and valuable species. The greatest species diversity is characteristic of the lower reaches of the river. In deep lakes and sections of the river near these lakes the density of fishes is higher. Scantiness of the fish population of river sites is due to the fact that most of the riverbeds in winter freeze. For this reason, there is no common minnow in the rivers. In most of the tundra non-riverine lakes that dominate among the waterbodies of the basin, there are no fish due to their shallow water and freezing. Some lakes of the lower reaches of the Baidaratayakha river are inhabited by fish only in summer (Asian smelt for breeding and whitefish for feeding). In some lakes, residential groupings (whitefish and pike) are formed. The estuary is used for feeding of whitefish from the Yuribey river and migrants from various regions of the Kara Sea (Arctic char, pink salmon, omul). The omul remains for the wintering in the estuary, most of the other whitefish return to the Yuribey river. The number of populations of residential forms of fish in most lakes is low due to low fish productivity and poaching. To preserve the resources of valuable fish species, it is proposed to include into the existing reserve Gornohadatinsky section of the upper and middle course of the Baidaratayakha river, where there are lakes that provide a reserve of grayling, and spawning grounds for the reproduction of arctic char and pink salmon.

scholarly journals Chewing lice (Phthiraptera: Amblycera, Ischnocera) from chukars (Alectoris chukar) from a pheasant farm in Jinacovice (CzechRepublic)

2012 ◽  
Vol 50 (No. 5) ◽  
pp. 213-218 ◽  
Author(s):  
O. Sychra
Keyword(s):  
Czech Republic ◽  
Species Diversity ◽  
The Other ◽  
Mean Intensity ◽  
Chewing Lice ◽  
Alectoris Chukar ◽  
Louse Species ◽  
First Time

One hundred and twenty captive chukars (Alectoris chukar) and other hosts from a pheasant farm in Jinacovice (Czech Republic) were searched for chewing lice from July 2003 to April 2004. Seven species of chewing lice were found on chukars: Amyrsidea perdicis, Menacanthus pallidulus, Menopon gallinae (Amblycera); Goniodes colchici, Lipeurus maculosus, Goniocotes microthorax and Cuclotogaster heterographus (Ischnocera). Except for the last two mentioned species, the other five louse species are recorded for the first time on chukars. The prevalence, mean intensity of infestation and mean abundance of the lice from chukars were recorded. The species diversity and distribution of chewing lice from another eight species of gallinaceous birds kept in the pheasant farm were also recorded.

scholarly journals Species Diversity of Bumblebees (Hymenoptera: Apidae) from Different Mountain Regions of Kashmir Himalayas

2011 ◽  
Vol 4 (1) ◽  
pp. 263 ◽  
Author(s):  
M. S. Saini ◽  
R. H. Raina ◽  
Z. H. Khan
Keyword(s):  
Species Diversity ◽  
Diversity Index ◽  
First Record ◽  
The Other ◽  
Mountain Regions ◽  
Flowering Stage ◽  
Mountain Ranges ◽  
Kashmir Himalayas ◽  
First Time ◽  
Eleven Species

The species diversity of bumblebees was investigated in three provinces Jammu, Kashmir and Ladakh during 2007-2010. Bumblebee queens, workers and males were collected right from the commencement till to the end of flowering stage in all the three mountain regions. In total, 27 species of bumblebees were collected and identified, of which eleven species were common in the two regions, e.g., Kashmir and Ladakh. A list of species assemblages and abundance is provided in each of the mountain ranges. Species diversity of three regions was determined with Shannon-Weiner diversity index and evenness was calculated with indices of Pielou. The obtained results showed species diversity; evenness and species richness were more observable in Kashmir compared with Ladakh and Jammu. The three sample sites within the Kashmir Himalayas indicate significant differences in species diversity; the Kashmir region had higher species diversity and richness than the other regions. Most species of bumblebees were collected in altitudinal ranges of 3000-4000m. Four species viz. Bombus cornutus, B. parthenius, B. miniatus and B. morawitizianus are recorded for the first time from this region, while B. morawitizianus turn out to be the first record to the national list.Key words: Species Diversity; Bumblebees; Kashmir Himalayas.© 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v4i1.8815J. Sci. Res. 4 (1), 263-272 (2012)

scholarly journals Checklist Of Fungi Of The Genus Russula From Belarusian-Valdai Lake District

2015 ◽  
Vol 21 (1) ◽  
pp. 22-33
Author(s):  
Pavel Kolmakov
Keyword(s):  
Species Diversity ◽  
The Other ◽  
Published Data ◽  
Lake District ◽  
Study Region ◽  
Rugged Terrain ◽  
Pskov Region ◽  
Herbarium Collections ◽  
First Time

AbstractThe species diversity of the genus Russula Pers. was studied at the northern part of Belarus and the southern part of Pskov region of Russia. The region of the study is characterized by numerous lakes and rugged terrain. The checklist of fungi of the genus Russula is based on the material collected by the author in 1999–2013 as well as the herbarium collections and published data of the other authors. The checklist encompasses 60 species, 28 of these were found to be rare in the area. R. azurea and R. favrei were reported for the first time in Belarus. Nineteen species – R. alutacea, R. atropurpurea, R. aurantiaca, R. brunneoviolacea, R. consobrina, R. fellea, R. grisea, R. heterophylla, R. laeta, R. mustelina, R. nitida, R. pectinatoides, R. pseudodelica, R. pseudointegra, R. rhodopoda, R. rosea, R. sanguinea, R. seperina and R. versicolor were reported for the first time in Pskov region. Most of the listed Russula species are widely distributed in Europe. Most species that are rare in the study region are uncommon in the whole Europe as well.

Darwin's two competing phylogenetic trees: marsupials as ancestors or sister taxa?

2012 ◽  
Vol 39 (2) ◽  
pp. 217-233 ◽  
Author(s):  
J. David Archibald
Keyword(s):  
Fossil Record ◽  
Evolutionary Biology ◽  
Phylogenetic Trees ◽  
Charles Darwin ◽  
The Other ◽  
Charles Lyell ◽  
Single Origin ◽  
Molecular Studies ◽  
Richard Owen ◽  
First Time

Studies of the origin and diversification of major groups of plants and animals are contentious topics in current evolutionary biology. This includes the study of the timing and relationships of the two major clades of extant mammals – marsupials and placentals. Molecular studies concerned with marsupial and placental origin and diversification can be at odds with the fossil record. Such studies are, however, not a recent phenomenon. Over 150 years ago Charles Darwin weighed two alternative views on the origin of marsupials and placentals. Less than a year after the publication of On the origin of species, Darwin outlined these in a letter to Charles Lyell dated 23 September 1860. The letter concluded with two competing phylogenetic diagrams. One showed marsupials as ancestral to both living marsupials and placentals, whereas the other showed a non-marsupial, non-placental as being ancestral to both living marsupials and placentals. These two diagrams are published here for the first time. These are the only such competing phylogenetic diagrams that Darwin is known to have produced. In addition to examining the question of mammalian origins in this letter and in other manuscript notes discussed here, Darwin confronted the broader issue as to whether major groups of animals had a single origin (monophyly) or were the result of “continuous creation” as advocated for some groups by Richard Owen. Charles Lyell had held similar views to those of Owen, but it is clear from correspondence with Darwin that he was beginning to accept the idea of monophyly of major groups.

Mosses and lichens of Shokalsky Island (Kara Sea, Yamal-Nenets Autonomous Area)

2020 ◽  
Vol 54 (2) ◽  
pp. 497-513 ◽  
Author(s):  
L. N. Beldiman ◽  
I. N. Urbanavichene ◽  
V. E. Fedosov ◽  
E. Yu. Kuzmina
Keyword(s):  
Plant Communities ◽  
Species Distribution ◽  
Arctic Tundra ◽  
Kara Sea ◽  
Lichenicolous Fungi ◽  
South West ◽  
West Part ◽  
First Time ◽  
Nenets Autonomous ◽  
Made In

We studied in detail a moss-lichen component of Shokalsky Island vegetation for the first time and identified 79 species of mosses and 54 species and 2 subspecies of lichens and lichenicolous fungi. All species of mosses and 23 species and 2 subspecies of lichens and lichenicolous fungi are recorded for the first time for the island. The study is based on collections made in South West part of the island, in arctic tundra. We also explored the participation of the mosses and lichens in the main types of plant communities and the species distribution in 10 ecotopes. The paper describes the noteworthy findings (Abrothallus parmeliarum, Aongstroemia longipes, Arthonia peltigerea, Caloplaca caesiorufella, Catillaria stereocaulorum, Ceratodon heterophyllus, Lecanora leptacinella, Sphagnum concinnum, S. olafii) and features of bryo- and lichenoflora of Shokalsky Island.

Sphagnum mosses (Sphagnaceae, Bryophyta) of mires Chefandzar and Masota in North Ossetia (Caucasus)

2018 ◽  
Vol 52 (2) ◽  
pp. 455-462 ◽  
Author(s):  
G. Ya. Doroshina ◽  
I. A. Nikolajev
Keyword(s):  
Plant Communities ◽  
The Other ◽  
North Caucasus ◽  
Sphagnum Mosses ◽  
Greater Caucasus ◽  
The North ◽  
First Time ◽  
North Ossetia

Sphagnum mires on the Greater Caucasus are rare, characterized by the presence of relict plant communities of glacial age and are in a stage of degradation. The study of Sphagnum of Chefandzar and Masota mires is carried out for the first time. Seven species of Sphagnum are recorded. Their distribution and frequency within the North Caucasus are analyzed. Sphagnum contortum, S. platyphyllum, S. russowii, S. squarrosum are recorded for the first time for the study area and for the flora of North Ossetia. The other mosses found in the study area are listed.

Supplement to biota of agaricoid basidiomycetes of Oksky Biosphere Reserve

2008 ◽  
Vol 42 ◽  
pp. 123-129
Author(s):  
E. F. Malysheva ◽  
L. F. Volosnova
Keyword(s):  
Species Diversity ◽  
Biosphere Reserve ◽  
Botanical Institute ◽  
Komarov Botanical Institute ◽  
First Time

New data on species diversity of agaricoid fungi of Oksky Biosphere Reserve are given. The checklist of 41 species with indication of their localities and herbarium numbers (of the Herbarium of the Komarov Botanical Institute, LE) is provided. Three species (Conocybe gigasperma, Entoloma occultopigmentatum, E. scabiosum) are recorded for the first time in Russia.

An Epistemological Criticism of Social Entrepreneurship: Is Social Entrepreneurship a Sound Scientific Field of Research

2018 ◽  
Author(s):  
Amir Forouharfar
Keyword(s):  
Social Entrepreneurship ◽  
Social Constructivism ◽  
Social Epistemology ◽  
American English ◽  
Meta Analysis ◽  
Research Question ◽  
Knowledge Structure ◽  
Scientific Field ◽  
The Other ◽  
First Time

The paper was shaped around the pivotal question: Is SE a sound and scientific field of research? The question has given a critical tone to the paper and has also helped to bring out some of the controversial debates in the realm of SE. The paper was organized under five main discussions to be able to provide a scientific answer to the research question: (1)<b> </b>is “social entrepreneurship” an oxymoron?, (2) the characteristics of SE knowledge, (3) sources of social entrepreneurship knowledge, (4) SE knowledge: structure and limitations and (5) contributing epistemology-making concepts for SE.<b> </b>Based on the sections,<b> </b>the study relied on the relevant philosophical schools of thought in <i>Epistemology </i>(e.g. <i>Empiricism</i>, <i>Rationalism</i>, <i>Skepticism</i>, <i>Internalism</i> vs. <i>Externalism</i>,<i> Essentialism, Social Constructivism</i>, <i>Social Epistemology, etc.</i>) to discuss these controversies around SE and proposes some solutions by reviewing SE literature. Also, to determine the governing linguistic discourse in the realm of SE, which was necessary for our discussion,<i> Corpus of Contemporary American English (COCA)</i> for the first time in SE studies was used. Further, through the study, SE buzzwords which constitute SE terminology were derived and introduced to help us narrowing down and converging the thoughts in this field and demarking the epistemological boundaries of SE. The originality of the paper on one hand lies in its pioneering discussions on SE epistemology and on the other hand in paving the way for a construction of sound epistemology for SE; therefore in many cases after preparing the philosophical ground for the discussions, it went beyond the prevalent SE literature through meta-analysis to discuss the cases which were raised. The results of the study verified previously claimed embryonic pre-paradigmatic phase in SE which was far from a sound and scientific knowledge, although the scholarly endeavors are the harbingers of such a possibility in the future which calls for further mature academic discussion and development of SE knowledge by the SE academia.

A Nabatean port on the Red Sea: note on the pottery finds from al-Qusayr (al-Wajh, Saudi Arabia)

2020 ◽  
Author(s):  
Caroline Durand
Keyword(s):  
Saudi Arabia ◽  
19Th Century ◽  
Red Sea ◽  
Point Of View ◽  
The Other ◽  
Trade Routes ◽  
Other Hand ◽  
Roman Egypt ◽  
Pottery Sherds ◽  
First Time

Al-Qusayr is located 40 km south of modern al-Wajh, roughly 7 km from the eastern Red Sea shore. This site is known since the mid-19th century, when the explorer R. Burton described it for the first time, in particular the remains of a monumental building so-called al-Qasr. In March 2016, a new survey of the site was undertaken by the al-‘Ula–al-Wajh Survey Project. This survey focused not only on al-Qasr but also on the surrounding site corresponding to the ancient settlement. A surface collection of pottery sherds revealed a striking combination of Mediterranean and Egyptian imports on one hand, and of Nabataean productions on the other hand. This material is particularly homogeneous on the chronological point of view, suggesting a rather limited occupation period for the site. Attesting contacts between Mediterranean merchants, Roman Egypt and the Nabataean kingdom, these new data allow a complete reassessment of the importance of this locality in the Red Sea trade routes during antiquity.

Status of Family Fissidentaceae in Gujarat

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
D.G. Shah ◽  
D.N. Mehta ◽  
R.V. Gujar
Keyword(s):  
Distinct Species ◽  
The State ◽  
The Other ◽  
Land Plants ◽  
Reproductive Structures ◽  
The Family ◽  
The Status ◽  
Vegetative Characters ◽  
First Time ◽  
Different Parts

Bryophytes are the second largest group of land plants and are also known as the amphibians of the plant kingdom. 67 species of bryophytes have been reported from select locations across the state of Gujrat. The status of family fissidentaceae which is a large moss family is being presented in this paper. Globally the family consists of 10 genera but only one genus, Fissidens Hedw. has been collected from Gujarat. Fissidens is characterized by a unique leaf structure and shows the presence of three distinct lamina, the dorsal, the ventral and the vaginant lamina. A total of 8 species of Fissidens have been reported from the state based on vegetative characters as no sporophyte stages were collected earlier. Species reported from the neighboring states also showed the absence of sporophytes. The identification of different species was difficult due to substantial overlap in vegetative characters. Hence a detailed study on the diversity of members of Fissidentaceae in Gujarat was carried out between November 2013 and February 2015. In present study 8 distinct species of Fissidens have been collected from different parts of the state. Three species Fissidens splachnobryoides Broth., Fissidens zollingerii Mont. and Fissidens curvato-involutus Dixon. have been identified while the other five are still to be identified. Fissidens zollingerii Mont. and Fissidens xiphoides M. Fleisch., which have been reported as distinct species are actually synonyms according to TROPICOS database. The presence of sexual reproductive structures and sporophytes for several Fissidens species are also being reported for the first time from the state.

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