scholarly journals Modern distribution, new breeding and moulting places of the Mute Swan (Cygnus olor Gmelin) in the Leningrad region in 2005–2015

2016 ◽  
Author(s):  
Sergey Kouzov ◽  
Anna Loseva
Keyword(s):  
Local Population ◽  
Weather Conditions ◽  
Current Status ◽  
Leningrad Region ◽  
Mute Swan ◽  
Territorial Expansion ◽  
Breeding Sites ◽  
Cygnus Olor ◽  
Mass Reproduction ◽  
Centers Of Mass

The article presents new data on nesting and moulting places of Mute Swan Cygnus olor Gmelin in the Leningrad region, observed in 2005–2015, describes the current status of its breeding and moulting places in the region, discovered in previous decades. An analysis of the spatial and landscape distribution of this species and the nature of its changes in recent years is given. The analysis shows that a significant increase in the number of breeding sites and moulting of the Mute Swan in the Leningrad region has not led to a marked increase in the local population. New places are populated primarily by solitary nesting pairs and small groups of moulting individuals, unlike some of the previously populated centers of mass reproduction and moult on Kurgalsky Peninsula and Seskar archipelago, where initially there was a high density of breeding and moulting birds. It may be characterised as a very low territorial expansion of the nesting area, but mainly as the colonization of empty loci in its old borders. Such type of colonization along with strong inter-seasonal local population dynamics depending on weather conditions, show the presence of climatical limit of the distribution of the this species in the region. Refs 58. Figs 6. Tables 1.

scholarly journals Heavy Metals in Tissues of the Mute Swan (Cygnus Olor)

1979 ◽  
Vol 20 (3) ◽  
pp. 447-465 ◽  
Author(s):  
Adrian Frank ◽  
Karl Borg
Keyword(s):  
Heavy Metals ◽  
Mute Swan ◽  
Cygnus Olor

Impact of Age, Season, and Flowingvs. Stagnant Water Habitat on Avian Influenza Prevalence in Mute Swan (Cygnus olor) in Belgium

2016 ◽  
Vol 60 (1s) ◽  
pp. 322-328 ◽  
Author(s):  
B. Lambrecht ◽  
S. Marché ◽  
P. Houdart ◽  
T. van den Berg ◽  
D. Vangeluwe
Keyword(s):  
Avian Influenza ◽  
Mute Swan ◽  
Stagnant Water ◽  
Cygnus Olor

Ecological Studies of the Mute Swan (Cygnus olor) in Southeastern Sweden. Acta Vertebratica

10.2307/2571 ◽  
1964 ◽  
Vol 33 (3) ◽  
pp. 526
Author(s):  
Christopher Perrins ◽  
B. E. Berglund ◽  
K. Curry-Lindahl ◽  
H. Luther ◽  
V. Olsson ◽  
...  
Keyword(s):  
Mute Swan ◽  
Ecological Studies ◽  
Cygnus Olor

United Front: Partisans of the Leningrad Region and their connections with the Central Asian Soviet Republics

2021 ◽  
Vol 2021 (02) ◽  
pp. 214-225
Author(s):  
Sergey Kulik ◽  
Аnatoliy Kashevarov ◽  
Zamira Ishankhodjaeva
Keyword(s):  
World War Ii ◽  
Weather Conditions ◽  
Leningrad Region ◽  
World War ◽  
North West ◽  
The North ◽  
Occupied Territory ◽  
Central Asian ◽  
The Difference ◽  
Almost All

During World War II, representatives of almost all the Soviet Republics fought in partisan detachments in the occupied territory of the Leningrad Region. Among them were many representatives of the Central Asian republics: Kazakhstan, Kyrgyzstan and Uzbekistan. Many Leningrad citizens, including relatives of partisans, had been evacuated to Central Asia by that time. However, representatives of Asian workers’ collectives came to meet with the partisans. The huge distance, the difference in cultures and even completely different weather conditions did not become an obstacle to those patriots-Turkestanis who joined the resistance forces in the North-West of Russia.

Evaluation of parental raspberry breeding forms for fruit size

2021 ◽  
pp. 16-22
Author(s):  
M. A. Podgaetskiy ◽  
S. N. Evdokimenko
Keyword(s):  
Objective Assessment ◽  
Fruit Size ◽  
Weather Conditions ◽  
Base Station ◽  
Average Weight ◽  
Trial Period ◽  
Parental Form ◽  
Breeding Sites ◽  
Berry Weight ◽  
Berry Size

Te article tackles the feasibility of improving the raspberry fruit size as an important production and marketability factor. Te trials included 22 domestic and foreign cultivars, 11 selected forms of raspberry, as well as ten cross-breeding combinations and three open-pollinated forms. Te assessment of parental forms and hybrids was carried out at the collection and breeding sites of the Kokino base station of Federal Horticultural Center for Breeding, Agrotechnology and Nursery during 2016-2020. Fruits were harvested from regular cultivar bushes every 2 days in triplicate. Te average weight was determined per 100 berries in each replicate. Cultivars and hybrids were divided into three groups, small- (3.6 g). Te average berry weight in hybrid nurslings was estimated per plant. Each plant was sampled with 30 berries. Weighing was performed with an SCC-750 electronic scales device. Te weather conditions of the trial period were contrast, allowing a more objective assessment of the collection and breeding raspberry material by berry weight. Te following cultivars were identified as the sources of improved berry size in the parental form trials: Maria, Cascade Delight, Fenomen, Lavina, Cowichan, Patricia, Laczka, Glen Ample and selections 2-115-1, 8-13-2, 18-11-3, 18-11-2, 2-90-2 and 2-90-3. Tese forms had an average trial-period berry weight of 3.7-4.3 g least affected by weather conditions. Te inspection of hybrids revealed the best parental forms for obtaining new raspberry cultivars with an improved berry weight: Maria, Fenomen, Lavina, Cowichan, Glen Ample and the selected form 8-13-2. Te promising cross-combinations are: 2-12-1 x Fenomen, Lavina x Ulybka, 8-13-2 x Peresvet, as well as the open-pollinated offspring of Glen Ample, Cowichan and Maria. Large-fruited genotypes isolated in these lineages will be used in further breeding to increase the fruit size in raspberry.

scholarly journals Seasonal activity of Dermacentor reticulatus ticks in the era of progressive climate change in eastern Poland

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zbigniew Zając ◽  
Joanna Kulisz ◽  
Aneta Woźniak ◽  
Katarzyna Bartosik ◽  
Adil Khan
Keyword(s):  
Climate Change ◽  
Local Population ◽  
Weather Conditions ◽  
Dermacentor Reticulatus ◽  
Seasonal Activity ◽  
Saturation Deficit ◽  
Annual Basis ◽  
Questing Ticks ◽  
The Mean

AbstractDermacentor reticulatus ticks are one of the most important vectors and reservoirs of tick-borne pathogens in Europe. Changes in the abundance and range of this species have been observed in the last decade and these ticks are collected in areas previously considered tick-free. This may be influenced by progressive climate change. Eastern Poland is an area where the local population of D. reticulatus is one of the most numerous among those described so far. At the same time, the region is characterized by a significant increase in the mean air temperature in recent years (by 1.81 °C in 2020) and a decrease in the average number of days with snow cover (by 64 days in 2020) and in the number of days with frost (by 20 days in 2020) on an annual basis compared to the long-term average. The aim of our research was to investigate the rhythms of seasonal activity and the population size of D. reticulatus in the era of progressive climate change. To this end, questing ticks were collected in 2017–2020. Next, the weather conditions in the years of observation were analyzed and compared with multi-year data covering 30 years preceding the study. The research results show that, in eastern Poland, there is a stable population of D. reticulatus with the peak of activity in spring or autumn (up to a maximum of 359 individuals within 30 min of collection) depending on the year of observation. Ticks of this species may also be active in winter months. The activity of D. reticulatus is influenced by a saturation deficit.

scholarly journals Has the Western Chorus Frog (Pseudacris triseriata) Declined in Western Ottawa, Ontario?

2011 ◽  
Vol 125 (3) ◽  
pp. 220
Author(s):  
David C. Seburn ◽  
Kari Gunson
Keyword(s):  
Land Use ◽  
Forest Cover ◽  
Historical Data ◽  
Current Status ◽  
Historical Records ◽  
Breeding Sites ◽  
Median Distance ◽  
Chorus Frogs ◽  
Historical Sites ◽  
Chorus Frog

To determine whether the Western Chorus Frog has declined in western Ottawa, we conducted auditory surveys at historical locations as well as at various other wetlands. Western Chorus Frogs were detected at 12 of 18 historical locations. Wetland habitat remained at all historical locations where the species was not detected. There was no difference in the year of historical records for sites where Western Chorus Frogs were (median 1987.5) and were not (median 1987.5) detected. In the present study, Western Chorus Frogs were also detected at 30 locations where they had not been previously reported. Historical sites where Western Chorus Frogs were not detected were not significantly farther away from known Western Chorus Frog sites (median distance: 2.2 km) than historical sites where Western Chorus Frogs were detected (median distance: 1.4 km). Land use variables for historical sites where Western Chorus Frogs were and were not detected did not vary significantly at any spatial scale from 0.5 to 2.0 km. Western Chorus Frogs were detected in areas with up to 50% forest cover and up to 86% agricultural cover at the 1.0-km radius. The lack of historical data makes it difficult to assess the current status of the Western Chorus Frog in western Ottawa. The species may have declined, remained approximately the same (by shifting to different breeding sites), or even increased its distribution (by colonizing additional sites).

Division of parental duties confirms a need for bi-parental care in a precocial bird, the mute swan Cygnus olor

2015 ◽  
Vol 65 (2) ◽  
pp. 163-176 ◽  
Author(s):  
Radosław Włodarczyk ◽  
Piotr Minias
Keyword(s):  
Parental Care ◽  
Breeding Season ◽  
Time Budget ◽  
Empirical Support ◽  
European Population ◽  
Mute Swan ◽  
Cygnus Olor ◽  
Territory Defence ◽  
Male Activity ◽  
Reproductive Activities

Parental investment is much reduced in precocial species when compared with altricial species, which may explain a predominance of uni-parental care in this group of birds. In precocial wildfowl, bi-parental care is mostly restricted to arctic-breeding species, where the short reproductive season forces mates to cooperate in caring for the young, but a temperate breeding mute swan Cygnus olor is one of the few notable exceptions. In order to explain a need for bi-parental care in this species, we collected data on the time-budget of eleven swan breeding pairs from a Central European population. We found sex-related differences in the mean time allocated to incubation, movement, feeding, resting and aggression. Others behaviours (nest maintenance, alert and comfort) changed along the breeding season, but did not differ between sexes. Females were primarily responsible for providing care to the brood, whereas male activity focused on territory defence and family guarding. Females were exclusively responsible for incubation and they covered 85% of the total time allocated by parents to feeding cygnets. Nearly constant incubation in females limited possibilities for other activities, including foraging. Males allocated significantly more time than females to aggressive interactions, directed mainly towards other breeding pairs and non-breeders. A clear division of parental duties between sexes gave empirical support for the presence of bi-parental care in the mute swan, despite the fact that reproductive activities of this species are not constrained by the short length of the breeding season, as in arctic-breeding wildfowl.

scholarly journals The Global Emergency of Novel Coronavirus (SARS-CoV-2): An Update of the Current Status and Forecasting

2020 ◽  
Vol 17 (16) ◽  
pp. 5648 ◽  
Author(s):  
Hossein Hozhabri ◽  
Francesca Piceci Sparascio ◽  
Hamidreza Sohrabi ◽  
Leila Mousavifar ◽  
René Roy ◽  
...  
Keyword(s):  
Clinical Manifestations ◽  
Weather Conditions ◽  
Respiratory Illness ◽  
Health Concern ◽  
Current Status ◽  
Global Public Health ◽  
Infected People ◽  
Published Evidence ◽  
Human Coronaviruses ◽  
Novel Coronavirus

Over the past two decades, there have been two major outbreaks where the crossover of animal Betacoronaviruses to humans has resulted in severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV). In December 2019, a global public health concern started with the emergence of a new strain of coronavirus (SARS-CoV-2 or 2019 novel coronavirus, 2019-nCoV) which has rapidly spread all over the world from its origin in Wuhan, China. SARS-CoV-2 belongs to the Betacoronavirus genus, which includes human SARS-CoV, MERS and two other human coronaviruses (HCoVs), HCoV-OC43 and HCoV-HKU1. The fatality rate of SARS-CoV-2 is lower than the two previous coronavirus epidemics, but it is faster spreading and the large number of infected people with severe viral pneumonia and respiratory illness, showed SARS-CoV-2 to be highly contagious. Based on the current published evidence, herein we summarize the origin, genetics, epidemiology, clinical manifestations, preventions, diagnosis and up to date treatments of SARS-CoV-2 infections in comparison with those caused by SARS-CoV and MERS-CoV. Moreover, the possible impact of weather conditions on the transmission of SARS-CoV-2 is also discussed. Therefore, the aim of the present review is to reconsider the two previous pandemics and provide a reference for future studies as well as therapeutic approaches.

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