Fauna parasitária de peixes oriundos de "pesque-pague" do município de Franca, São Paulo, Brasil. I. Protozoários

Abstract

ABSTRACT. Parasitic fauna of cultivated fishes in feefishing farm ofFranca, São Paulo State, Brazil. I. Protozoans. The present work studied protozoan parasites of cultivated fishes (N = 433) from two feefishing fal111 situated in Franca, São Paulo, Brazil, during a period of April 1997 through March 1999. Specimens of piauçú Leporinus macrocephalus Garavello & Britski, 1988 (Anostomidae) o sistema de cultivo intensivo, usualmente praticado pelas pisciculturas industriais, caracteriza-se pelo aumento da densidade de estocagem de peixes, visando a máxima produção. Assim, nesse tipo de exploração comercial, surgem com freqüência problemas relativos ao manejo inadequado, às questões nutricionais e às enfermidades infecciosas e parasitárias (THATCHER &

Parasitic fauna in hybrid tambacu from fish farms

“…However, the observed rates of infection were lower than those described for tambacu farmed in different regions other than the Brazilian Southeast (Tavares-Dias et al, 2001a;Schalch & Moraes, 2005), and were also lower than reports of P. mesopotamicus in the Central-West region (Sant'Ana et al, 2012), where this protozoan caused high mortality. Martins et al (2001) reported a mortality of 61.3% in the winter season (May-August) in the Southeast region, when water temperatures ranged from 17 to 24 o C. In the Central-West region, this protozoan occurred in winter and summer, and 100% of mortality was observed by Sant'Ana et al (2012).…”

“…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.…”

“…However, this can lead to the incidence of a variety of parasitoses if culture conditions are inadequate (Tavares-Dias et al, 2001a;Lizama et al, 2007;Eiras et al, 2010;Martins et al, 2010;Godoi et al, 2012), which may result in epizooties, depending on the abundance of parasites and on the disease severity. These diseases, however, are most prevalent in newly cultured species, or in newly developed culture systems, and become rare once husbandry practices are well developed.…”

“…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).…”