Dipteros simbovinos : colonização e sucessão em placas isoladas de fezes bovinas

AUTOR(ES)
DATA DE PUBLICAÇÃO

1996

RESUMO

This work carried out in two stages. Initialy, in the laboratory, we removed symbovine flies from cow pats collected in Bragança Pta. and Campinas, and extracted Sepsidae flies (Diptera:Sepsidae) directly over the pats. Most fly families that emerged in the laboratory were common to both 10calities.The most abundant families were: Sepsidae, Sphaeroceridae, SCiaridae, Muscidae Psychodidae, Scatopsidae. Comparative analysis between both places were based on the Similarity Index of Jaccard and Simpson, and Shannon-Weaver s Diversity Index, indicating a larger quantitative rather than qualitative similarity between the two places. Hight densities of species of Sepsidae were identified to elaborate a key to Symbovine Sepsidae. Polymorphism was detected and documented in Archisepsis scabra (Loew) .At the second stage, in Campinas, we monthly removed immature flies from artificial cow pats that were placed in open pasture. The known ages of the exposed pats were: 24, 48, 72, 144 and 216 hours of exposition. The individuals were counted and separated into families. The families that were present for up to 216 hours were: Sepsidae, with the highest abundance, Sphaeroceridae, Calliphoridae, Muscidae, Sarcophagidae, Stratiomyidae, Psychodidae. The observation of the differencial distribution of the families at different time of extraction seems to indicate that Sepsidae and Muscidae are the first to colonize cow pats, while Sphaeroceridae and Psychodidae colonize older pats. Comparisons between peaks of the populations of Diptera and Coleoptera indicate a possible negative interaction between these two orders of insects

ASSUNTO(S)

diptero parasitologia fezes

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