Fauna parasitária de peixes oriundos de "pesque-pagues" do município de Franca, São Paulo, Brasil. II. Metazoários

Abstract

mesopalamieus that shawed a hi gher susceptibility to Argu/us sp inlestation. lt was not observed significant difference (P > 0.05) in the seasonal variation of L. cyprinacea infection of ali species. L. macrocepho/us, P. mesopolamicus and tambacu showed a great number of P. pi//u/are with no signiticant difference (P > 0.05 ) between them. Manogenean infections were obselved in ali examined spec ies, without significant difference (P > 0.05) in the seasonal variatian. Nevel1he less, occurrence of monagenean was higher in P. mesopolamicus and lower in N ile-til apia. By the other hand, parasites number collected from P. mesOpOlall1iclls was lower in the winter. Copepadits of L. cyprinacea were found in the gills of P. mesopolamieus, tambacu and L. macrocepha/us. However, adults of L. eyprinacea were observed on ly in the P. mesopolamicus and tambacu.

Parasite diversity in Oxydoras niger (Osteichthyes: Doradidae) from the basin of Solimões River, Amazonas state, Brazil, and the relationship between monogenoidean and condition factor

“…They showed a positive correlation with Kn. This elevated mean intensity was similar to that related in cultured Piaractus mesopotamicus Holmberg, 1884 (Tavares- Dias et al, 2001b) and larger than that related in A. ocellatus in Guandu River, RJ (Azevedo et al, 2007) and ornamental fish from the Negro River, AM (Tavares- Dias et al, 2010). Our results confirm that monogenoideans are among the most common fish parasite that occurs in several environments.…”

Parasitic fauna in hybrid tambacu from fish farms

“…This parasite provokes an excessive production of mucus on the gill filaments, decreasing the respiratory capacity of fish. The prevalence of monogenoideans in the present study was higher than the one found for tambacu cultured in the southeastern region of Brazil (Tavares-Dias et al, 2001b;Martins et al, 2002;Schalch & Moraes, 2005), but the intensity was lower (Tavares-Dias et al, 2001b). Therefore, since these parasites are directly transmitted from fish to fish, the proximity among hosts in ponds might also be important for the successful transmission of this parasite.…”

“…The gastrointestinal tract was removed, placed in a Petri dish containing NaCl (0.8%), and examined under a stereomicroscope. The methods used for collection, fixation (Eiras et al, 2006;Thatcher, 2006), and quantification of the parasites (Tavares-Dias et al, 2001a, 2001b were performed according to previous recommendations. The identification of the collected parasites was done according to Díaz-Ungria (1968), Kritsky et al (1979), Thatcher & Paredes (1985), Boeger et al (2002), Belmont-Jégu et al (2004), andThatcher (2006).…”

“…bras., Brasília, v.48, n.8, p.1049-1057, ago. 2013 DOI: 10.1590/S0100-204X2013000800034 et al ., 2001a, 2001bMartins et al, 2002), and grows faster than P. mesopotamicus (Tavares-Dias et al, 2007). General characteristics such as shape, size, diet, and grayish color are closer to the parental tambaqui.…”

“…Studies report the occurrence of the protozoa Piscinoodinium pillulare (Martins et al, 2000(Martins et al, , 2002Tavares-Dias et al, 2001a;Schalch & Moraes, 2005), Ichthyophthirius multifiliis (Ceccarelli et al, 1990;Martins & Romero, 1996;Tavares-Dias et al, 2001a;Martins et al, 2000Martins et al, , 2002, and Trichodina sp. (Ceccarelli et al, 1990;Tavares-Dias et al, 2001a;Martins et al, 2002); of Monogenoidea (Ceccarelli et al, 1990;Martins & Romero, 1996;Tavares-Dias et al, 2001b;Martins et al, 2000Martins et al, , 2002; of the crustaceans Lernaea cyprinacea (Martins & Romero, 1996;Martins et al, 2000Martins et al, , 2002Tavares-Dias et al, 2001b;Schalch & Moraes, 2005), Dolops carvalhoi (Tavares-Dias et al, 2007), Myxobolus myxosporean colossomatis (Martins et al, 1999), and Henneguya piaractus (Martins & Romero, 1996;Martins et al, 1999); and of the digenean Posthodiplostomum sp. (Alexandrino et al, 1996).…”