Fauna endoparasitária comparativa de Acestrorhynchus britskii Menezes, 1969 e Acestrorhynchus lacustris Lütken, 1875 (Actinopterygii, Acestrorhynchidae) do reservatório de Três Marias, bacia do rio São Francisco, Minas Gerais, Brasil

Abstract

This study aimed to identify the species composition of the fauna endoparasites of two species of fishes from the Três Marias reservoir, as well as quantify the parasitic parameters and correlate these parameters with total length and sex of the two hosts and also compare qualitatively and quantitatively two diversity of parasite communities. A total of 88 fish were collected from the Três Marias reservoir (18 ° 12'59 "S, 45 ° 17'34" W), upper São Francisco river, Minas Gerais, in January 2009 and July 2009. Of these total, 41 specimens were of Acestrorhynchus britskii Menezes, 1969, and 47 of Acestrorhynchus lacustris Lütken, 1875. Five species of parasites were found in two communities components, and only nematodes: Hysterothylacium sp. Contracaecum sp. Rhabdochona (Rhabdochona) acuminata (Molin, 1860), Procamallanus (Spirocamallanus) saofranciscensis (Moreira, Oliveira e Costa, 1994) and Travassosnema travassosi Costa, Moreira & Oliveira, 1991. Four species were common to both hosts: Hysterothylacium sp. Contracaecum sp., R. (R.) acuminata and P. (S.) saofranciscensis. The most prevalent species in both hosts were Hysterothylacium sp. and Contracaecum sp.. There was high similarity between the two parasite communities, having been available and used the diet and feeding behavior of fish, the determining factors.