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

Abstract

<jats:p>Forty-one specimens of mandi-amarelo Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) and 54 specimens of jundiá Rhamdia quelen (Quoy &amp; 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.</jats:p>

Helminth fauna parasitizing Pimelodus pohli (Actinopterygii: Pimelodidae) from the upper São Francisco River, Brazil

“…Studies on parasitism in pimelodids have been also conducted in other localities of Brazil, such as some helminth parasites of species of Pimelodus Lacepède, 1803: P. blochii Valenciennes, 1840in Paraná River (KOHN et al, 1997; P. fur (Lütken, 1874) in Paraná River ; P. maculatus in Amazon Basin in Guaiba River (KOHN;FRÓES, 1986;FORTES et al, 1993;SARMENTO et al, 1995); in Guandu River (SANTOS et al, 2007;ALBUQUERQUE et al, 2008;AZEVEDO et al, 2010); in Itajaí-Açu River (BACHMANN et al, 2007); in Mogi Guaçu River (TRAVASSOS; KOHN, 1965;KOHN et al, 1985;FERNANDES, 1987;AGUIAR et al, 2011); in Paraiba do Sul River (VENANCIO et al, 2010); in Paraná River (TRAVASSOS; KOHN, 1965;MACHADO DOS SANTOS, 1992;MORAVEC et al, 1993MORAVEC et al, , 1997KOHN et al, 1997;PAVANELLI, 2004;KOHN, 2008;KOHN et al, 2011;LOPES et al, 2011); in Paranapanema River (RAMOS et al, 2013); Pimelodus microstoma Steindachner, 1877 in Mogi Guaçu River (AGUIAR et al, 2011) [note of the authors: this fish species was cited by the authors as P. heraldoi Azpelicueta, 2001, that is a junior synonym of P. microstoma Stein., sensu Ribeiro and Lucena (2010) KOHN, 2001;KOHN et al, 2011); Pimelodus sp. in Amazon Basin (VICENTE et al, 1978).…”

Levantamento da parasitofauna de duas espécies de peixes do Rio Mogi Guaçu, Região Sudeste do Brasil

“…A parasitofauna de P. maculatus no rio Mogi Guaçu apresenta semelhanças com a de outros rios estudados (Bachmann et al, 2007;Santos et al, 2007;Albuquerque et al, 2008;Venâncio et al, 2010). No presente trabalho 99,2% dos P. maculatus estavam parasitados por pelo menos uma espécie de parasito, sendo que os mais prevalentes foram os monogenéticos que ocorreram em quase todos os indivíduos coletados.…”

Preference for microhabitat by Monogenea on the gills of the south american catfishRhamdia quelenat different stocking densities under laboratory conditions

“…The fi sh maintained in laboratory are more exposed to stress, what favours spreading of the disease pathogens; in fi sh maintained at 42 fi sh per tank more protection could be observed with fi sh agglomeration, possibly favoring their wellfare. Venancio et al (2010) recognized Aphanoblastella sp. as a dominant parasite on the gills of the south american catfi sh in the Paraí-ba do Sul river, State of Rio de Janeiro.…”