Stichorchis subtriquetrus in two beavers (Castor fiber) from Slovenia

AbstractIntestines of two beavers (Castor fiber), one killed by a car accident and one drowned were examined for parasites. Examination revealed the presence of 1 and 14 adult trematodes, Stichorchis subtriquetrus in the caecum and colon, respectively. The flotation method revealed no ova from faecal material. The European beaver was present in the territory of Slovenia until the beginning of the 18th century. Recently, in 1998, the species reappeared in southeast of Slovenia as a result of the reintroduction of European beaver in Croatia. This is the first report of veterinary examination of beaver and the first evidence of S. subtriquetrus in Slovenia.

Download Full-text

A Contribution to the Anatomy and Embryology of Cladorchis (Stichorchis) Subtriquetrus Rudolphi, 1814 (Fischoeder, 1901)

Parasitology ◽

10.1017/s0031182000003826 ◽

1918 ◽

Vol 10 (2) ◽

pp. 267-279

Author(s):

Fred D. Weidman

Keyword(s):

Castor Fiber ◽

Internal Anatomy ◽

European Beaver ◽

Stichorchis Subtriquetrus ◽

American Beaver

In 1814 Rudolphi described, under the name of Amphistomum subtriquetrum, a fluke from the caecum of the European beaver (Castor fiber). Little of importance was added for many years; i.e., until 1897, when Otto described it somewhat fully including its internal anatomy, and 1901 and 1903, when Fischoeder wrote of it in his classical revision of the Amphistomidae. In 1914 Duff described a similar parasite, this time from the American beaver (Castor fiber canadensis) which she believes to be identical with that of the European animal.

Download Full-text

Reintroduction of the European beaver (Castor fiber L.) into Serbia and return of its parasite: The case of Stichorchis subtriquetrus

Archives of Biological Sciences ◽

10.2298/abs0901141c ◽

2009 ◽

Vol 61 (1) ◽

pp. 141-145 ◽

Cited By ~ 4

Author(s):

D. Cirovic ◽

I. Pavlovic ◽

V. Ivetic ◽

M. Milenkovic ◽

I. Radovic ◽

...

Keyword(s):

20Th Century ◽

Adult Female ◽

Castor Fiber ◽

European Beaver ◽

First Occurrence ◽

Stichorchis Subtriquetrus ◽

The Given ◽

Specific Parasite

After becoming extinct in the second half of the 20th century, the European beaver (Castor fiber L., 1758) was successfully reintroduced from Bavaria into Serbia during 2004-2005. In the necropsy of an adult female beaver (found dead in December of 2007), we discovered some parasites identified as Stichorchis subtriquetrus in the colon and peritoneal area. This is the first occurrence of the given specific parasite of beavers in Serbia. Decoding of a subcutaneous implanted microchip has confirmed that our specimen was one of the released beavers. We therefore conclude that the parasite in question was reintroduced into Serbia with the beavers originating from Bavaria.

Download Full-text

Stichorchis subtriquetrus in European beaver from Croatia: first report

European Journal of Wildlife Research ◽

10.1007/s10344-004-0076-6 ◽

2005 ◽

Vol 51 (1) ◽

pp. 63-64 ◽

Cited By ~ 5

Author(s):

Heinz Sager ◽

Dean Konjević ◽

Marijan Grubešić ◽

Zdravko Janicki ◽

Krešimir Severin ◽

...

Keyword(s):

European Beaver ◽

First Report ◽

Stichorchis Subtriquetrus

Download Full-text

Selective Foraging on Tree and Shrub Species by the European Beaver Castor fiber in Lowland and Highland Habitats in Western Poland

Polish Journal of Ecology ◽

10.3161/15052249pje2018.66.3.008 ◽

2018 ◽

Vol 66 (3) ◽

pp. 286 ◽

Cited By ~ 1

Author(s):

Agnieszka Ważna ◽

Jan Cichocki ◽

Jacek Bojarski ◽

Grzegorz Gabryś

Keyword(s):

Castor Fiber ◽

Shrub Species ◽

European Beaver ◽

Selective Foraging

Download Full-text

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

Acta Veterinaria Scandinavica ◽

10.1186/s13028-021-00588-w ◽

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.

Download Full-text