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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 1, 2002, pp. 133-136
Bioline Code: oc02025
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 1, 2002, pp. 133-136

 en Activity of Tabanids (Insecta: Diptera: Tabanidae) Attacking the Reptiles Caiman crocodilus check for this species in other resources (Linn.) (Alligatoridae) and Eunectes murinus check for this species in other resources (Linn.) (Boidae), in the Central Amazon, Brazil
Ruth LM Ferreira; Augusto L Henriques & José A Rafael


Tabanid females are better known as hematophagous on man and other mammals, and linked to mechanical transmission of parasites. The association between tabanids and reptiles is poorly known, but has been gaining more corroboration through experiments and occasional observation in the tropics. The present study was conducted at a military base (CIGS/BI-2), situated 54 km from Manaus, Amazonas, in a small stream in a clearing (02°45'33"S; 59°51'03"W). Observations were made monthly, from April 1997 to March 1998, during two consecutive days. At the same time, other vertebrate animals were offered, including humans. However in this paper only data obtained on a common caiman, Caiman crocodilus (Linn.), and an anaconda, Eunectes murinus (Linn.), in diurnal observations from 05:30 a.m. to 18:30 p.m., will be discussed. A total of 254 tabanid specimens were collected, 40 from the anaconda and 214 from the caiman. Four tabanid species were recorded on these two reptiles: Stenotabanus cretatus check for this species in other resources Fairchild, S. bequaerti Rafael et al., Phaeotabanus nigriflavus check for this species in other resources (Kröber) and Tabanus occidentalis check for this species in other resources Linn. Diurnal activities showed species-specific patterns. The first three species occurred only in the dry season. T. occidentalis occurred during the whole observation period, and with increased frequency at the end of the dry season. We observed preferences for body area and related behavior of the host. Observations on the attack of tabanids on one dead caiman are also presented.

Tabanidae, horse fly, hematophagy, common caiman, anaconda, tropical forest, Amazon Basin

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