As infracomunidades parasitárias de Anodus elongatus Agassiz, 1829 (Characiformes: Hemiodontidae) de um lago de várzea da Amazônia brasileira

Abstract

Thirty-five specimens of Anodus elongatus captured during three expeditions, July 2015 and in June and December of 2016, at the complex of Catalão, Iranduba and Amazonas lakes were analysed. The fishes measured in average of 13.03 cm (12.0 – 23.5 cm) in standard length and weighed 74.31g (18.13 - 112.5g). A total of 3,847 parasites were found. Nine species parasitize A. elongatus, all consisting the first registers. One species of Monogenoidea: 2.519 Diaphorocleidus sp. One species of metacercarias de Digenea: 875 specimens of the subfamily Crassiphialinae type Neascus. One species of Acanthocephala: 63 individuals of Echinorhynchus sp. Three species of Nematoda: 22 individuals of Procamallanus (Spirocamallanus) paraguayenis, 2 larvas of Contracaecum sp and one larva of Pseudoproleptus sp. Two species of Copepoda: 314 Ergasilus triangularis and 50 Ergasilus turucuyus. One specie of Branchiura: one individual of Argulus chicomendesi. The central species were: Diaphorocleidus sp., subfamilia Crassphialinea type Neascus and E. triangularis. Only E. turucuyus was considered secondary and the other satellites: P. (S.) paragauyensis, Contracaecum sp., Pseudoproleptus sp., Echinorynchus sp. and. Argulus chicomendesi. The parasites species presented aggregated distribution except P. (S.) paragauyensis, that was random. Most parasitic species had higher abundance and intensity in the high-water season (full), but the prevalence was higher in low water (dry) except P. (S.) paraguayensis.