IUCN / SSC Cat Specialist Group - Digital Cat Library
   

 

View printer friendly
Rondon, M.V.S.d.S.
Biodiversidade de parasitas intestinais em mam¡feros silvestres de duas localidades do Estado de SÆo Paulo
2010  Full Book

The parasites occur practically in all trophic levels and their transmission can depend by the presence of a variety of intermediate, parathenic and definitive hosts within the ecosystem. They have important effects over their host populations as, behaviour changing, reproductive success and mortality. By these reasons, some authors consider then important environmental indicators. The objective of this studying was the epidemiology and the intestinals parasites biodiversity in wild mammals from the reservoir of Jaguari, located at the City of Vargem, SÆo Paulo state, and relates with the hosts habits. The specimens were captured by traps, than measured, checked the weight, marked, the faeces were collected and the animals were released. For the intestinals parasites research, the sedimentation and fluctuation methods were used, and autopsies were performed in some cases. In the Jaguari reservoir 23 collects were performed between august 2005 to august 2007. The smalls captured mammals (N= 235) were: _Akodon montensis _(71.5%), _Calomys _sp. (6.8%), _Oligoryzomys nigripes _(14%), _Didelphis aurita _(3.4%), _Gracilinanus sp. _(0.4%), _Lutreolina crassicaudata _(0.4%), _Monodelphis sp. _(2.1%) and _Sylvilagus brasiliensis _(1.3%). Also faeces samples were collected (N=44) from the margins of the reservoir as: _Hydrochoerus hydrochaeris _(56.8%), _Lontra longicaudis _(38.6%) and _Puma concolor _(4.5%). From the 303 samples, 205 showed positive for parasites, representing 67.6%. Were found: adults of _Cruzia tentaculata _(0.5%), larvae of Nematoda (18.5%), Ascarididae eggs (2.9%), _Cruzia tentaculata _(1.5%), Oxyuridae (0.9%), similars to _Dioctophyma _sp. (0.5%), _Syphacia _sp. (0.5%), Toxocaridae sp. (0.5%), Trichostrongylidae (79%), Trichuridae (17%), _Hymenolepis diminuta _(0.9%), _Hymenolepis nana _(5.4%), Pseudophyllidea (0.9%), Taeniidae (0.5%), Trematoda (6.3%) and Acanthocephala (3.4%). Cysts of Amoebidae (1.9%), _Giardia _sp. (0.9%), similars to _Balantidium _sp. (0.5%), oocysts of Coccidiida (10.2%), _Eimeria _sp. (0.9%) and trophozoites of Amoebidae (2.4%), also were found. In the Ecological Park, were done 16 collects between November 2006 to February 2008. The small mammals captured (N= 103) were the rodents _Myocastor coypus _(6.8%), _Nectomys squamipes _(1.0%), _Rattus rattus _(20.4%), and the marsupial _Didelphis albiventris _(71.8%). The total faeces samples collected was 279, and 207 showed positive for parasites, representing 74.2%. Were found adults of _Cruzia tentaculata _(1.4%), Nematoda larvae (24.1%), Ascarididae eggs (3.4%), Capillaridae (2.9%), _Cruzia tentaculata _(67.6%), Oxyuridae (3.4%), similars to _Dioctophyma _sp. (1.0%); similar to _Syngamus _sp. (6.3%), Spiruroidea (1.0%), Trichostrongylidae (21.2%), Trichuridae (19.8%), _Hymenolepis diminuta _(0.5%), Trematoda (8.2%), and Acanthocephala (1.9%). Oocysts of Coccidiida (39.6%), _Eimeria _sp. (4.3%) and _Isospora _sp. (1.0%) were present as well_. Akodon montensis _was the most frequent animal and with the highest number of parasites morphotypes from the Jaguari reservoir, the same happened with the marsupial _Didelphis albiventris _in the Ecological Park. The most frequent parasites were those which have monoxenic cycle, which are intimately connected to the feed habits from the studied animals.

PDF files are only accessible to Friends of the Cat Group. Joining Friends of the Cat Group gives you unlimited access and downloads in the Cat SG Library for one year, and allows you to receive our newsletter Cat News (2 regular issues per year plus special issues). More information how to join here

 

(c) IUCN/SSC Cat Specialist Group ( IUCN - The World Conservation Union)