scholarly journals Parasitic fauna of Eurasian beavers (Castor fiber) in Sweden (1997–1998)

2021 ◽  
Vol 63 (1) ◽  
Author(s):  
Per-Arne Åhlen ◽  
Göran Sjöberg ◽  
Margareta Stéen
Keyword(s):  
Age Groups ◽  
Ecological Factors ◽  
Parasite Fauna ◽  
Castor Fiber ◽  
Older Individuals ◽  
Parasitic Fauna ◽  
Eurasian Beaver ◽  
Norwegian Population ◽  
Stichorchis Subtriquetrus ◽  
One Year

Abstract Background The parasitic fauna of beavers (Castor fiber and C. canadensis) has been well studied in many parts of their respective areas of distribution. In Scandinavia there have, however, been limited investigations conducted on the parasites of beavers in recent times. The present study is the first quantitative survey of parasites on beavers living in Sweden and elsewhere in Scandinavia. We investigated the parasitic fauna of the Eurasian beaver (C. fiber) in a North–South gradient in Sweden. The aim of the study was to investigate parasite distribution and prevalence in particular, related to average yearly air temperature and different age groups of beavers. A total of 30 beavers were sampled at eight localities, spanning a 720 km North–South gradient during the springs of 1997 and 1998. Results Five parasite taxa were identified. Four of these were present in all of the examined beavers, Stichorchis subtriquetrus (trematode), Travassosius rufus (nematode), Platypsyllus castoris (coleopteran), and Schizocarpus spp. (arachnid). A higher number of new infections of S. subtriquetrus, and more adults of T. rufus, were seen in beavers in southern Sweden where temperatures are higher. One-year old beavers had a higher infestation of S. subtriquetrus, but not of T. rufus, than older individuals. Conclusions The parasite fauna of Swedish beavers mirrored the impoverished parasite fauna of the original Norwegian population, and the high prevalence of parasites could be due to low major histocompatibility complex (MHC) polymorphism. Young beavers had a higher load of trematodes, probably depending on behavioural and ecological factors. Warmer temperatures in southern localities likely contributed to increased endoparasite loads.

scholarly journals On parasite fauna of the European beaver

2021 ◽  
Vol 15 (3) ◽  
pp. 11-16
Author(s):  
O. N. Andreyanov ◽  
A. N. Postevoy ◽  
A. V. Khrustalyov ◽  
E. A. Sidor ◽  
O. G. Timofeeva
Keyword(s):  
Infection Rate ◽  
Helminth Infection ◽  
Physiological State ◽  
Natural Habitat ◽  
Parasite Fauna ◽  
Internal Organs ◽  
Central Russia ◽  
Eurasian Beaver ◽  
Stichorchis Subtriquetrus ◽  
Specially Protected Areas

The purpose of the research is identification of the current parasitological situation for Eurasian beavers inhabiting the Central Russia.Materials and methods. The work was carried out on hunting farms and in specially protected areas of the Central Russia. Potentially infective material was collected, recorded and preserved from animals during 2015–2021. The age of the animals was determined by their weight and physiological state of the rodents’ teeth and internal organs, and the sex was determined by their genitals. The animals were examined according to the method of complete and partial helminthological dissection per Skryabin.Results and discussion. A total of 41 animals were examined. Three forms of parasitism on animals were identified in natural habitat, namely, the trematode Stichorchis subtriquetrus, the nematode Travassosius rufus, and the ectoparasite Platypsyllus castoris. The stichorchosis causative agent localized in the animal’s large intestine was diagnosed in 35 rodents (85.4%). The helminth infection was 96% in the Eurasian beaver and 68.7% in the Canadian beaver. The nematode infection in stomach was detected in 31 animals (75.6%). The infection by T. rufus was 88% in the Eurasian beaver, and 56.3% in the Canadian beaver. The infected animals were delivered from the Vladimir, Moscow, Ryazan, Tula and Yaroslavl Regions. The beaver beetle P. castoris was found in 6 animals (14.6%). The infection rate was 8% in the Eurasian beaver, and 25% in the Canadian beaver. Animals with wingless arthropods have been identified in the Moscow and Ryazan Regions.

MONITORING RESULTS OF SAZAN (CYPRINUS CARPIO CARPIO LINNAEUS, 1758) POPULATION IN THE EASTERN PART OF THE TAGANROG BAY AND THE DON RIVER DELTA

2020 ◽  
Author(s):  
P.A. Balykin ◽  
◽  
A.V. Startsev ◽  
G.E. Guskov ◽  
A.S. Grin ◽  
...  
Keyword(s):  
Age Groups ◽  
Indirect Evidence ◽  
Parasite Fauna ◽  
River Delta ◽  
Weight Growth ◽  
Younger Age ◽  
Cyprinus Carpio Carpio ◽  
Don River ◽  
Taganrog Bay ◽  
Biological State

The materials for 2003-2018 on the biological state of sazan of the eastern part of the Taganrog Bay and the Don River delta were summarized. It has been shown that the catches of sazan in the study area consisted of more than half of the fish of younger age groups, the length of which was less than the commercial measure. The ratio of linear and weight growth of sazan is shifting towards a decrease in the mass of one-dimensional specimen, which is indirect evidence of the deterioration of the natural living conditions of semi-migratory fish. In 2019, the carp parasite fauna was represented by 7 species related to monogenes - 2 species, cestodes - 3 species, nematodes - 1 species, crustaceans - 1. The state of the sazan population needs further research.

scholarly journals One Year of the COVID-19 Pandemic in Galicia: A Global View of Age-Group Statistics during Three Waves

2021 ◽  
Vol 18 (10) ◽  
pp. 5104
Author(s):  
Iván Area ◽  
Henrique Lorenzo ◽  
Pedro J. Marcos ◽  
Juan J. Nieto
Keyword(s):  
Intensive Care Unit ◽  
Hospital Admissions ◽  
Age Groups ◽  
Age Group ◽  
Nw Spain ◽  
The Past ◽  
Global View ◽  
Time Period ◽  
Key Variables ◽  
One Year

In this work we look at the past in order to analyze four key variables after one year of the COVID-19 pandemic in Galicia (NW Spain): new infected, hospital admissions, intensive care unit admissions and deceased. The analysis is presented by age group, comparing at each stage the percentage of the corresponding group with its representation in the society. The time period analyzed covers 1 March 2020 to 1 April 2021, and includes the influence of the B.1.1.7 lineage of COVID-19 which in April 2021 was behind 90% of new cases in Galicia. It is numerically shown how the pandemic affects the age groups 80+, 70+ and 60+, and therefore we give information about how the vaccination process could be scheduled and hints at why the pandemic had different effects in different territories.

Eurasian beaver ( Castor fiber ) health surveillance in Britain: Assessing a disjunctive reintroduced population

2021 ◽  
Author(s):  
Róisín Campbell‐Palmer ◽  
Frank Rosell ◽  
Adam Naylor ◽  
Georgina Cole ◽  
Stephanie Mota ◽  
...  
Keyword(s):  
Health Surveillance ◽  
Castor Fiber ◽  
Eurasian Beaver ◽  
Reintroduced Population

scholarly journals Healthcare use prior to suicide in the Stockholm County population 2011-2016

2019 ◽  
Vol 29 (Supplement_4) ◽  
Author(s):  
J Narusyte ◽  
K Kosidou ◽  
C Dalman
Keyword(s):  
Age Groups ◽  
Public Health Problem ◽  
Major Public Health Problem ◽  
Healthcare Use ◽  
Stockholm County ◽  
Suicide Death ◽  
Death Registry ◽  
County Population ◽  
Study Population ◽  
One Year

Abstract Background Suicide is a major public health problem. A detailed description of healthcare use prior to suicide can serve to improve prevention strategies. The aim of the study was to describe the patterns of primary, specialized outpatient, and inpatient healthcare use from two weeks and up to one year prior to suicide in Stockholm County. Methods The study population included all 15 year or older suicide victims who died in Stockholm County 2011-2016 (n = 1950) identified through National Cause of Death Registry. Data on number of visits and contacts with healthcare among suicide victims were obtained from VAL healthcare use registry in Stockholm County. Healthcare use was depicted from one year to up to two weeks prior to suicide death. Results Preliminary results showed that there were 65% and 57% of women and men, respectively, who had at least one contact with healthcare during the last two weeks before suicide death. Measured one year prior to suicide, there were 93% of women and 85% of men who had at least one contact with healthcare. Among those who had at least one contact with healthcare two weeks prior to suicide, there were 16% of women and 12% of men who were hospitalized, 55% of women and 47% of men who had a contact with specialized outpatient care, and 32% of women and 27% of men who had a contact with primary healthcare. The proportion of those who did not have any contact with healthcare during the six months prior to suicide decreased gradually with increasing age among men (23% at ages of 15-24 years old and 7% at ages of 65 and older). There were on average 7% of women in all age groups who did not have any contact with healthcare during the six months prior to suicide. Conclusions The majority of the suicide victims had a contact with healthcare during the last year prior to suicide death. The findings suggest that suicide prevention efforts may target improved tools for clinically-based risk assessment. Key messages The majority of the suicide victims had at least one contact with healthcare during the last year prior to suicide death. Those who did not have any contact with healthcare during six months prior to suicide were more likely to be young men.

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