scholarly journals Phytocoenology and Population Structure of Species of the Genus Malva L. in the Ganja-Gazakh Region (Azerbaijan)

2021 ◽  
Vol 7 (12) ◽  
Author(s):  
A. Nasirovа
Keyword(s):  
Population Structure ◽  
Environmental Conditions ◽  
Integral Characteristic ◽  
Negative Influence ◽  
Demographic Structure ◽  
Malva Sylvestris ◽  
Malva Parviflora ◽  
The Republic

The article presents the results of a study of the mallow genus — Malva L. characteristic of the meadow vegetation of the Ganja-Gazakh region of the Republic of Azerbaijan. From 11 species of the genus Malva L. distributed on the territory of Azerbaijan, 4 species (Malva sylvestris L., Malva nicaeensis All., Fl. Pedem, Malva pusilla Sm., Malva parviflora L.) are found in the Ganja-Gazakh region. The species M. parviflora was first identified by us in this territory. The species M. parviflora and M. sylvestris are not widely distributed in this territory. The structure of populations of M. pusilla and M. nicaeensis species was studied. 7 populations in which M. pusilla and M. nicaeensis species are distributed were phytocoenological evaluated. 3 cenopopulations in which the species M. nicaeensis is common were evaluated in different years. All groups of plant ontogenesis are found in the studied populations. It was found that in different years in the populations of these two species of the genus mallow, recovery is weak, and aging is intense. During the analysis of the population structure, reproduction indices — Ib and aging — Iq were determined, which are important population indicators. The integral characteristic of the demographic structure of M. pusilla and M. nicaeensis species is determined, the populations are estimated, the composition, age (height) and the degree of effectiveness of their ontogenesis are studied. The dynamics of changing ontogenesis in the cenopopulations of M. pusilla and M. nicaeensis species in various environmental conditions, depending on the positive or negative influence of its factors on the structure of ontogenesis, is revealed.

scholarly journals Vaccination of cattle in the system of antiepizootic measures in Buryatia

2021 ◽  
pp. 46-52
Author(s):  
O. B. Badmaeva
Keyword(s):  
High Risk ◽  
Infectious Diseases ◽  
Environmental Conditions ◽  
Far East ◽  
Well Being ◽  
Entire Region ◽  
The Far East ◽  
Natural Foci ◽  
Epizootic Process ◽  
The Republic

On the territory of the Republic of Buryatia, six nosological forms of infectious diseases have epizootic significance among cattle. The most widespread are leptospirosis, rabies, and isolated cases of pasteurellosis. Natural foci of rabies were formed, confined to the environmental conditions of the neighboring territories of Mongolia and the TRANS-Baikal territory. Epizootic process tends to polyhostal manifestation with the threat of expanding the focus and complicating the epidemic situation in the entire region of Siberia and the Far East. In 2018 169 heads of cattle were identified with a positive reaction to leptospirosis in 13 administrative districts. Preventive immunization of animals with the control of immunity tension in areas with a high risk of introduction of infectious diseases is the basis for maintaining epizootic well-being throughout the region.

scholarly journals Insight into the Current Genetic Diversity and Population Structure of Domestic Reindeer (Rangifer tarandus) in Russia

Animals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1309
Author(s):  
Veronika Kharzinova ◽  
Arsen Dotsev ◽  
Anastasiya Solovieva ◽  
Olga Sergeeva ◽  
Georgiy Bryzgalov ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Rangifer Tarandus ◽  
Allelic Richness ◽  
Environmental Changes ◽  
Principal Component ◽  
Genetic Structuring ◽  
Habitat Location ◽  
The Republic ◽  
Insight Into

To examine the genetic diversity and population structure of domestic reindeer, using the BovineHD BeadChip, we genotyped reindeer individuals belonging to the Nenets breed of the five main breeding regions, the Even breed of the Republic of Sakha, the Evenk breed of the Krasnoyarsk and Yakutia regions, and the Chukotka breed of the Chukotka region and its within-breed ecotype, namely, the Chukotka–Khargin, which is bred in Yakutia. The Chukotka reindeer was shown to have the lowest genetic diversity in terms of the allelic richness and heterozygosity indicators. The principal component analysis (PCA) results are consistent with the neighbor-net tree topology, dividing the reindeer into groups according to their habitat location and origin of the breed. Admixture analysis indicated a genetic structuring of two groups of Chukotka origin, the Even breed and most of the geographical groups of the Nenets breed, with the exception of the Murmansk reindeer, the gene pool of which was comprised of the Nenets and apparently the native Sami reindeer. The presence of a genetic component of the Nenets breed in some reindeer inhabiting the Krasnoyarsk region was detected. Our results provide a deeper insight into the current intra-breeding reindeer genetic diversity, which is an important requirement for future reindeer herding strategies and for animal adaptation to environmental changes.

scholarly journals Population structure and conservation status of the white gorgonian Eunicella singularis (Esper, 1791) in Tunisian waters (Central Mediterranean)

2021 ◽  
Author(s):  
RAOUIA GHANEM ◽  
JAMILA BEN SOUISSI ◽  
JEAN-BAPTISTE LEDOUX ◽  
CRISTINA LINARES ◽  
JOAQUIM GARRABOU
Keyword(s):  
Population Structure ◽  
Tissue Injury ◽  
Conservation Status ◽  
Tunisian Population ◽  
Demographic Structure ◽  
Central Mediterranean ◽  
Southern Mediterranean ◽  
Hard Bottom Communities ◽  
Distribution And Ecology ◽  
High Level

The white gorgonian, Eunicella singularis, is thriving in Mediterranean hard-bottom communities; however, data regarding its distribution and ecology remain absent and insufficient, particularly in the southern Mediterranean Sea.In this study, the population structure and disturbance levels of the most common gorgonian in Tunisia were assessed for the first time. During two years (2015-2016), a total of 818 colonies of E. singularis was surveyed in five coastal sites, by scuba diving, between 7 to 40 m depth. Collected data included density, colony height, and extent of injury. Mean population density was 11.91 ± 7.42 colonies per m2 (mean ± SD). Mean and maximum colony heights were 16.49 ± 5.59 cm and 51 cm, respectively. Among populations, mean extent of tissue injury differed considerably, ranging from 12.47% to 58.88% and most affected colonies showed old necrosis. These data regarding the demographic structure and level of injuries are needed to provide insights into the conservation status of the Tunisian population of E. singularis. Indeed, data on the amount of necrosis could highlight the strength of the colonies’ exposure to mechanical impacts and are consequently crucial to study changes in their demographic structure over time. In fact, the size, structures, and the high level of tissue necrosis of the colonies suggest a low conservation status of the studied Tunisian populations.

scholarly journals Dezvoltarea unui complex mobil pentru reproducerea ecologo- industrial a speciilor pelagofile de pești în condiții de fluvii și lacuri

2021 ◽  
Author(s):  
Oleg Crepis ◽  
◽  
Dumitru Bulat ◽  
Elena Zubcov ◽  
Marin Usatii ◽  
...  
Keyword(s):  
Fish Species ◽  
Environmental Conditions ◽  
Aquatic Ecosystems ◽  
Anthropogenic Impact ◽  
Fish Stock ◽  
Basic Principles ◽  
Republic Of Moldova ◽  
Natural Reproduction ◽  
Productivity Management ◽  
The Republic

The populations of most fish species in the Republic of Moldova reproduce naturally, however, as a result of the increasing anthropogenic impact on aquatic ecosystems, the conditions for their natural reproduction have deteriorated significantly. In this context, one of the research objectives for 2020 was the development of efficient technological principles for conservation and rational use of local fish stock. It was revealed the ensuring of the development of the most vulnerable stages in the ontogenesis of fish in controlled environmental conditions is one of the basic principles of productivity management of Danube mackerel populations. In order to put into practice the principles of managing the productivity of breeding stocks, a mobile installation has been developed for the reproduction of pelagophilous fish species.

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