scholarly journals Seasonal Pattern of Prevalence and Excretion of Eggs of Baylisascaris transfuga in the Brown Bear (Ursus arctos)

Animals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2428
Author(s):  
Ladislav Molnár ◽  
Alžbeta Königová ◽  
Peter Major ◽  
Zuzana Vasilková ◽  
Martina Tomková ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Seasonal Dynamics ◽  
Ursus Arctos ◽  
Seasonal Pattern ◽  
Brown Bear ◽  
Seasonal Prevalence ◽  
Mean Intensity ◽  
Mean Temperature ◽  
The Mean ◽  
Baylisascaris Transfuga

The seasonal dynamics of the prevalence, abundance, and mean intensity of egg excretion by the nematode parasite Baylisascaris transfuga in the European brown bear (Ursus arctos) were monitored relative to environmental factors (mean temperature, humidity, and temperature) over three years. The prevalence, abundance, and mean intensity of egg excretion tended to increase from spring to autumn throughout the monitoring period. The seasonal prevalence (84.2–90.6%), abundance (470.2–545.3 eggs per gramme (EPG) of faeces), mean intensity of excretion (558.3–602.1 EPG), and number of eggs (1150 EPG) were highest in autumn. The prevalence of eggs (up to 48.5%), abundance (37.8–60.6 EPG), and mean intensity of excretion (94.4–125.0 EPG) were high in winter, despite the period of hibernation. The seasonal dynamics of B. transfuga abundance in bears, the mean temperature between spring and autumn, and the seasonal trend of increase in intensity of egg excretion with temperature from winter to summer were interrelated. Abundance differed significantly between winter and autumn, spring and autumn, and summer and autumn (p < 0.0001) in all years and between spring and summer in 2016 (p < 0.005), 2017 (p < 0.05). B. transfuga abundance differed significantly between the seasons over the three years only in spring (p ≤ 0.0001).

scholarly journals Parasitofauna of Brown Bear (Ursus arctos) in the Protected Landscape Area CHKO — Poľana

2016 ◽  
Vol 60 (4) ◽  
pp. 20-24 ◽  
Author(s):  
T. Orosová ◽  
M. Goldová ◽  
J. Ciberej ◽  
G. Štrkolcová
Keyword(s):  
Seasonal Dynamics ◽  
Dominant Species ◽  
Ursus Arctos ◽  
Brown Bear ◽  
Young Female ◽  
Brown Bears ◽  
Baylisascaris Transfuga ◽  
Autumn And Winter

Abstract During the years 2015—2016 we obtained 15 samples of faeces of brown bears (Ursus arctos) and 2 samples of gastrointestinal (GI) tracts of young female brown bears for helminthological examinations. The samples of faeces were collected from various sites in the protected landscape area CHKO-Poľana, and the gastrointestinal tracts originated from bears hunted down in the same area within permitted regulation of bear population for 2015. Of the 17 samples collected from the CHKO-Poľana area, 13 were positive for the presence of parasites (76.47 %). Parasitological examinations revealed the presence of 5 species of endoparasites: Eimeria, Cryptosporidium, Sarcocystis, Baylisascaris and Ancylostoma. Roundworms Baylisascaris transfuga (46.15 %) and Ancylostoma spp. (30.77 %) were the dominant species. Observation of the seasonal dynamics showed the highest prevalence of parasites during autumn and winter.

scholarly journals Seasonal Variation in Month of Diagnosis of Polish Children with Type 1 Diabetes - A Multicenter Study

2018 ◽  
Vol 127 (05) ◽  
pp. 331-335 ◽  
Author(s):  
Agnieszka Szypowska ◽  
Anna Ramotowska ◽  
Marta Wysocka-Mincewicz ◽  
Artur Mazur ◽  
Lucyna Lisowicz ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Seasonal Variation ◽  
Environmental Factors ◽  
Seasonal Pattern ◽  
Age Groups ◽  
Rural Setting ◽  
Mean Temperature ◽  
Autumn And Winter

Abstract Aim The seasonal variation of incidence of type 1 diabetes (T1D) theory supports the hypothesis that environmental factors play a role in the onset of the disease. The aim of this study is to assess seasonality of month of diagnosis in children with T1D in Poland. Material and methods the study group consisted of 2174 children from eastern and central Poland diagnosed with T1D between 2010 and 2014. Analysis was performed in different age groups, based on place of residence (rural/urban area) and depending on sex. Results We noted significant seasonality in the incidence of T1D with a peak in diagnosis of diabetes in January and the minimum rate in June. A total of 423 (19%) children were diagnosed in the warmest months (June to August with a mean temperature of 16.8°C) compared to 636 (29%) recognised in the coldest months (December to February with a mean temperature of −1.6°C), OR 0.57 95%CI [0.51-0.67], p<0.0001. We noted a more flat seasonal pattern in children 0-4 years of age compared with subjects 5–17 years old with a week correlation of trend comparison between both groups, r=0.69, p=0.001. Similar seasonal variation in the incidence of T1D was noted in children from urban and rural setting. For girls, seasonal pattern peaks were observed one month earlier as compared to boys. Conclusions Seasonal variation in incidence of T1D diagnosis of Polish children supports the role of different environmental factors in diabetes onset. The majority of children were diagnosed with diabetes in autumn and winter.

scholarly journals Environmental factors in cauliflower curd initiation and growth.

1987 ◽  
Vol 35 (4) ◽  
pp. 435-445 ◽  
Author(s):  
R. Booij
Keyword(s):  
Environmental Factors ◽  
Final Number ◽  
Mean Temperature ◽  
Number Of Leaves ◽  
The Mean ◽  
Temperature Time

In 1982, 1983 and 1984, seedlings of the cultivars Delira and Elgon were transplanted on several dates during the summer. The number of days between transplanting and curd initiation varied between 25 and 46 and was not related to the transplanting date. The date of curd initiation was correlated with the mean temperature in the period after initiation of the 19th leaf. At higher temperatures, curd initiation was delayed. The initiation date for Elgon tended to be a few days later than that for Delira. The final number of leaves (all initiated before curd initiation) was best correlated with mean maximum day temperature in the period between initiation of the 19th leaf and curd initiation. The variation in duration of curd growth was less than the variation of the period between transplanting and curd initiation. The duration of curd growth could be explained as well by the date of curd initiation as by a temperature-time product or by the mean irradiance. (Abstract retrieved from CAB Abstracts by CABI’s permission)

The incidence of central serous chorioretinopathy in the population of Kazan: Results of a retrospective epidemiological analysis for 2009–2018

2020 ◽  
pp. 30-33
Author(s):  
D. R. Аgliullin ◽  
G. R. Khasanova ◽  
E. A. Abdulaeva ◽  
S. T. Agliullina ◽  
A. N. Amirov ◽  
...  
Keyword(s):  
Growth Rate ◽  
Central Serous Chorioretinopathy ◽  
Morbidity Rate ◽  
Seasonal Prevalence ◽  
Upward Trend ◽  
Epidemiological Analysis ◽  
Significant Upward Trend ◽  
Track Record ◽  
Minimum Age ◽  
The Mean

Objective: To assess the incidence of central serous chorioretinopathy (CSC) through the example of a large industrial Russian city.Methods: A retrospective analysis of CSC of Kazan population for 2009–2018 has been done.Results: From 2019 to 2018, 831 new cases of CSC were registered in Kazan. A statistically significant upward trend with growth rate 105.2% and accession rate 5.2% was typical for the annual track record. The mean age of patients was 50 years, the minimum age was 14 years, the maximum age was 87 years. A statistically significant upward trend was detected in track record of incidence in groups of 30–39-year-old and 40–49-year-old. Seasonal increase of the incidence was recorded in February, March, April, October, and November.Conclusions: The upward trend and seasonal prevalence are typical for longterm morbidity of CSC in Kazan. The highest morbidity rate of CSC and statistically significant upward trend of its incidence in track record were recorded in the age of 30–39. 

Brown Bear (Ursus arctos) Habitat Use and Food Resources on Elmendorf Air Force Base, Alaska

2007 ◽  
Author(s):  
Sean D. Farley ◽  
Herman Griese ◽  
Rick Sinnott ◽  
Jessica Coltrane ◽  
Chris Garner ◽  
...  
Keyword(s):  
Habitat Use ◽  
Air Force ◽  
Ursus Arctos ◽  
Brown Bear ◽  
Food Resources ◽  
Air Force Base

scholarly journals Using Landscape Change Analysis and Stakeholder Perspective to Identify Driving Forces of Human–Wildlife Interactions

Land ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 146
Author(s):  
Mihai Mustățea ◽  
Ileana Pătru-Stupariu
Keyword(s):  
Landscape Change ◽  
Ursus Arctos ◽  
Driving Forces ◽  
Brown Bear ◽  
Mountain Range ◽  
Change Analysis ◽  
Local Stakeholders ◽  
Stakeholder Perspective ◽  
Forested Ecosystems ◽  
Forest Habitats

Human–wildlife interactions (HWI) were frequent in the post-socialist period in the mountain range of Central European countries where forest habitats suffered transitions into built-up areas. Such is the case of the Upper Prahova Valley from Romania. In our study, we hypothesized that the increasing number of HWI after 1990 could be a potential consequence of woodland loss. The goal of our study was to analyse the effects of landscape changes on HWI. The study consists of the next steps: (i) applying 450 questionnaires to local stakeholders (both citizens and tourists) in order to collect data regarding HWI temporal occurrences and potential triggering factors; (ii) investigating the relation between the two variables through the Canonical Correspondence Analysis (CCA); (iii) modelling the landscape spatial changes between 1990 and 2018 for identifying areas with forest loss; (iv) overlapping the distribution of both the households affected by HWI and areas with loss of forested ecosystems. The local stakeholders indicate that the problematic species are the brown bear (Ursus arctos), the wild boar (Sus scrofa), the red fox (Vulpes vulpes) and the grey wolf (Canis lupus). The number of animal–human interactions recorded an upward trend between 1990 and 2018, and the most significant driving factors were the regulation of hunting practices, the loss of habitats, and artificial feeding. The landscape change analysis reveals that between 1990 and 2018, the forest habitats were replaced by built-up areas primarily on the outskirts of settlements, these areas coinciding with frequent HWI. The results are valid for both forest ecosystems conservation in the region, wildlife management, and human infrastructures durable spatial planning.

scholarly journals First Benedicks Effect in Gas-Free Mercury, as Influenced by the Mean Temperature

Nature ◽  
1940 ◽  
Vol 145 (3665) ◽  
pp. 148-148
Author(s):  
C. BENEDICKS ◽  
P. SEDERHOLM
Keyword(s):  
Mean Temperature ◽  
The Mean
Sign in / Sign up

Export Citation Format

Share Document