Biodiversidade dos monogenéticos (Platyhelminthes: monogenea) parasitos de peixes do Rio Guandu, estado do Rio de Janeiro, Brasil

Abstract

Between the period from August 2005 to August 2007 were collected and analyzed 565 specimens belonging to 20 species from the Guandu River, near the dam of water treatment station (WTS) (22 ° 48 ' 32 "S, 43 ° 37'35" W), State of Rio de Janeiro, to study the biodiversity of the monogeneans from Guandu river, considering the strategic importance of this river in the State of Rio de Janeiro. Of the 20 fish species studied in this work, 13 were parasitized by monogeneans. All monogeneans were found parasitizing the gills of the hosts. A total of 24 species of monogenean were found, with 18 belonging to the family Dactylogyridae Bychowsky, 1933, four belonging to the family Gyrodactylidae Van Beneden and Hesse, 1863 and two belonging to the family Diplectanidae Monticelli, 1903. Fish belonging to the families Auchenipteridae, Cichlidae, Heptapteridae, Mugilidae and Pimelodidae were parasitized by only monogenean family Dactylogyridae. The family Centropomidae was parasitized by only monogenean belonging to the family Diplectanidae. The fishes of the families Anostomidae, Characidae and Loricariidae were parasitized by monogeneans belonging to the families Dactylogyridae and Gyrodactylidae. In this work are described six new species of monogeneans, being one species of Jainus, four species of Ligophorus and one species of Rhabdosynochus, respectively parasitizing Leporinus copelandii Steindachner, 1875, Mugil liza Valenciennes, 1836 and Centropomus undecimalis (Bloch, 1792). In this study were made 12 new records of hosts and 21 new records of locality. Key words: Between the period from August 2005 to August 2007 were collected and analyzed 565 specimens belonging to 20 species from the Guandu River, near the dam of water treatment station (WTS) (22 ° 48 ' 32 "S, 43 ° 37'35" W), State of Rio de Janeiro, to study the biodiversity of the monogeneans from Guandu river, considering the strategic importance of this river in the State of Rio de Janeiro. Of the 20 fish species studied in this work, 13 were parasitized by monogeneans. All monogeneans were found parasitizing the gills of the hosts. A total of 24 species of monogenean were found, with 18 belonging to the family Dactylogyridae Bychowsky, 1933, four belonging to the family Gyrodactylidae Van Beneden and Hesse, 1863 and two belonging to the family Diplectanidae Monticelli, 1903. Fish belonging to the families Auchenipteridae, Cichlidae, Heptapteridae, Mugilidae and Pimelodidae were parasitized by only monogenean family Dactylogyridae. The family Centropomidae was parasitized by only monogenean belonging to the family Diplectanidae. The fishes of the families Anostomidae, Characidae and Loricariidae were parasitized by monogeneans belonging to the families Dactylogyridae and Gyrodactylidae. In this work are described six new species of monogeneans, being one species of Jainus, four species of Ligophorus and one species of Rhabdosynochus, respectively parasitizing Leporinus copelandii Steindachner, 1875, Mugil liza Valenciennes, 1836 and Centropomus undecimalis (Bloch, 1792). In this study were made 12 new records of hosts and 21 new records of locality.