Metazoan parasites of Mandi-amarelo Pimelodus maculatus and of Jundiá Rhamdia quelen (Osteichthyes: Siluriformes) of Paraíba do Sul River, Volta Redonda, Rio de Janeiro

Aline Cristine Pinto Venancio,Dimitri Ramos Alves,Gesilene Ribeiro De Aguiar,Patrícia Da Silva Lopes

doi:10.1590/s1984-29612010000300006

Aline Cristine Pinto Venancio, Dimitri Ramos Alves + Show 2 more

Open Access

https://doi.org/10.1590/s1984-29612010000300006

Copy DOI

Abstract

Forty-one specimens of mandi-amarelo Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) and 54 specimens of jundiá Rhamdia quelen (Quoy & Gaimard, 1824) (Siluriformes: Heptapteridae) were collected from the Paraíba do Sul River, Volta Redonda, State of Rio de Janeiro, Brazil between November 2007 and October 2008. These fish underwent necropsy so their infracommunities of metazoan parasites could be studied. The same three species of parasites were collected in the two fish species studied. These were one monogenean, one nematode, and one hirudinean. Cucullanus pinnai (Travassos, Artiga, and Pereira, 1928) (Nematoda: Cucullanidae) and Aphanoblastella sp. (Monogenea: Dactylogyridae) were the dominant species with the highest prevalence in P. maculatus and R. quelen. The parasite species of P. maculatus and R. quelen showed an atypical over-dispersed pattern of distribution. No parasite species showed significant correlation between the body total length of the siluriform hosts and their prevalence and abundance. The parasite species richness showed a mean value of 0.87 ± 0.67 (0-2) and 0.57 ± 0.56 (0-2) in P. maculatus and R. quelen, respectively, and no correlation with the body total length.

Highlights

The Paraíba do Sul River is the main source of lotic waters in the State of Rio de Janeiro
Its hydrographic basin has an area of approximately 57,000 km2, being mostly flat with its lower-medium area surrounded by rounded hills and small intermediary valleys located at the valley bottoms between the Mar and Mantiqueira ranges (ARAÚJO, 1998; BIZERRIL; PRIMO, 2001; TEIXEIRA et al, 2005)
In P. maculatus we found 54.7% monogeneans, 44.8% nematodes, and 0.5% hirudineans whereas in R. quelen we found 96.3% monogeneans, 3.4% nematodes, and 0.3% hirudineans

Summary

Introduction

The Paraíba do Sul River is the main source of lotic waters in the State of Rio de Janeiro. Its hydrographic basin has an area of approximately 57,000 km, being mostly flat with its lower-medium area surrounded by rounded hills and small intermediary valleys located at the valley bottoms between the Mar and Mantiqueira ranges (ARAÚJO, 1998; BIZERRIL; PRIMO, 2001; TEIXEIRA et al, 2005). Due to both consumptive and non‐consumptive use, the Paraiba do Sul River has suffered a considerable anthropogenic impact (SEMADS, 2001; ARAÚJO et al, 2009). A total of 81 species of fish, classified in 9 orders, 29 families, and 55 genera have been found in the river

Methods

Results

Conclusion