Ecological aspects of small strongylids in the Paraíba Valley Region, State of São Paulo, Brazil
Ci. Rural
; 38(8)2008.
Article
in En
| VETINDEX
| ID: vti-705625
Responsible library:
BR68.1
ABSTRACT
Post-mortem studies were conducted on twenty equids (16 horses and four mules) of the Paraíba Valley, during a period of twelve years (1988 to 2000) in order to establish the ecological descriptors of the different species of small strongylids (Subfamily Cyathostominae, Tribe Cyathostominea). Samples of 10% of total gastrointestinal content was examined and a total of 13,832 of Cyathostominea were obtained with a prevalence of 100%. The most prevalent and abundant species were Cylicocyclus nassatus (100%), Cylicostephanus longibursatus and Cylicostephanus goldi (95%). The population of Cyathotominea showed an average Dispersion Index (DI) of 49.03 and an average Green index (GI) of 0.226. The parasitic community had average diversity of 1.79, calculated by Shannon-Wiener' Index, and 0.77 by Simpson's Index of Diversity. The evenness (Pielou's Index) presented an average of 0.28.The intensity of infection had a positive correlation with the parasite richness (P 0,05) and the diversity (P 0,01). Specimens of C. nassatus showed preference for the ventral colon (P 0.01), Cyathostomum coronatus for the caecum (P 0.01), C. longibursatus and C. goldi a preference for both the ventral colon and the dorsal colon (P 0.01).
RESUMO
Foram realizados estudos post-mortem em 20 eqüídeos provenientes do Vale do Paraíba para obtenção de descritores ecológicos dos pequenos estrongilídeos (Subfamíia, Cyathostominae, Tribo Cyathostominea). Das alíquotas de 10% do conteúdo intestinal total, foram recuperados 13.832 Cyathostominea com 100% de prevalência. As espécies, Cylicocyclus nassatus (100%), Cylicostephanus longibursatus e Cylicostephanus goldi (95%) foram as mais prevalentes e abundantes. A população de Cyathostominea apresentou Índice de Dispersão (ID) médio de 49,03 e Índice de Green (IG) médio de 0,226. A diversidade apresentou média de 1,79 (Ìndice de Shannon - Wiener) e 0,77 (Índice de Diversidade de Simpson). O índice de Pielou registrou equitabilidade média de 0,28. A intensidade da infecção apresentou correlação positiva com a riqueza parasitária (P 0,05) e a diversidade (P 0,01). Espécies de C. nassatus mostraram preferência pelo cólon ventral (P 0,01), Cyathostomum coronatus pelo ceco (P 0,01), C. longibursatus e C. goldi preferência por ambos, cólon ventral e cólon dorsal (P 0,01).
Full text:
1
Database:
VETINDEX
Country/Region as subject:
America do sul
/
Brasil
Language:
En
Journal:
Ci. Rural
/
Ciênc. rural (Online)
Year:
2008
Document type:
Article