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A study on the nematode parasites of nine species of freshwater fishes from Peixe River São Paulo, State, Brazil. was conducted. Fish were collected between February 2010 and March 2011 and the following species were found: Procamallanus (Spirocamallanus) inopinatus and Contracaecum sp. (larvae) in Astyanax altiparanae; Contracaecum sp. (larvae), Dioctophyma renale (larvae), Philometroides caudata, P. (Spirocamallanus) inopinatus, P. (Spirocamallanus) neocaballeroi (larvae) and P. (Spirocamallanus) saofranciscensis in Acestrorhynchus lacustris; Contracaecum sp. (larvae), Guyanema sp., Hysterothylacium sp. (larvae) and Icthyouris sp. in Cyphocharax modestus; Contracaecum sp. (larvae), Cosmoxynemoides aguirrei and Pharyngodonidae gen. sp. in C. nagelii; Dioctophyma renale (larvae), Hysterothylacium sp. (larvae) and Rhabdochona sp. in Gymnotus sylvius; Capillariidae gen. sp. in Hoplosternum littorale; Cosmoxynema vianai, Guyanema sp., Ichthyouris sp. and Travnema travnema in Steindachnerina insculpta; Contracaecum sp. (larvae), Procamallanus (Spirocamallanus) rebecae (larvae) in Triportheus angulatus and Rhabdochona acuminata in Triportheus nematurus. This is first study of nematode parasites from the Peixe River, therefore all the species found are new geographical records and 19 are new host records. Se llevó a cabo un estudio de los nematodos parásitos de nueve especies de peces de agua dulce del Río do Peixe, Estado de São Paulo, Brasil. Los peces fueron colectados entre febrero de 2010 y marzo de 2011 y las especies encontradas fueron: Procamallanus (Spirocamallanus) inopinatus y Contracaecum sp. (larva) en Astyanax altiparanae; Contracaecum sp. (larva), Dioctophyma renale (larva), Philometroides caudata, P. (Spirocamallanus) inopinatus, P. (Spirocamallanus) neocaballeroi (larva) y P. (Spirocamallanus) saofranciscensis en Acestrorhynchus lacustris; Contracaecum sp. (larva), Guyanema sp., Hysterothylacium sp. (larva) y Icthyouris sp. en Cyphocharax modestus; Contracaecum sp. (larva), Cosmoxynemoides aguirrei y Pharyngodonidae. gen. sp. en C. nagelii; Dioctophyma renale (larva), Hysterothylacium sp. (larva) y Rhabdochona sp. en Gymnotus sylvius; Capillariidae gen. sp. en Hoplosternum littorale; Cosmoxynema vianai, Guyanema sp., Ichthyouris sp. y Travnema travnema en Steindachnerina insculpta; Contracaecum sp. (larva), Procamallanus (Spirocamallanus) rebecae (larva) en Triportheus angulatus y Rhabdochona acuminata en Triportheus nematurus. Este es el primer estudio de nemátodos parásitos de Río do Peixe, por lo tanto todas las especies son nuevos registros geográficos y 19 son nuevos registros de hospedadores.

Biodiversity of fish parasites is a field of significant growth worldwide, whether due to the advancement of fish farms or the important role of these organisms as indicators of environment quality and ecosystem health, making them useful tools in the conservation and maintenance of the biodiversity as a whole. The objectives of this study were to evaluate the structure and composition of the parasitic fauna of Prochilodus lineatus collected from two structurally distinct stretches of the Batalha River. Fifty specimens of P. lineatus were collected between June 2015 and June 2016. Of these 50 hosts, 875 parasite specimens were collected, divided into 30 species, belonging to seven groups: Myxozoa, Monogenea, Digenea, Acanthocephala, Nematoda, Copepoda and Hirudinea. In addition to new records of known parasites of P. lineatus for this locality, 13 species were newly recorded parasitizing this fish, including a new monogenean species (Tereancistrum sp. n.), with Monogenea being the most representative class in the study. The findings of this study expands the known geographic distribution of these parasite species and helps to increase the knowledge of the biodiversity of these organisms in different hosts and environments. In general, the structure and composition of the P. lineatus parasitic fauna did not seem to be influenced by the structural characteristics of the two stretches studied, due to the migratory habits of the host. Resumo: A biodiversidade de parasitos de peixes é um campo de pesquisa com significativo crescimento mundial, seja pelo aumento das pisciculturas ou pelo importante papel desses organismos como indicadores da qualidade do ambiente e da saúde do ecossistema, tornando-os importantes ferramentas na conservação e manutenção da biodiversidade como um todo. O objetivo desse estudo foi de avaliar a estrutura e composição da fauna parasitária de Prochilodus lineatus coletados em dois trechos estruturalmente distintos do rio Batalha. Cinquenta espécimes de P. lineatus foram coletados entre junho de 2015 e junho de 2016. Desses 50 hospedeiros, foram coletados 875 espécimes de parasitos, divididos em 30 espécies, pertencentes a sete grupos: Myxozoa, Monogenea, Digenea, Acanthocephala, Nematoda, Copepoda e Hirudinea. Além dos novos registros para a localidade com parasitos já observados parasitando P. lineatus anteriormente, obteve-se o novo registro de 13 espécies parasitando este peixe, além do registro de uma nova espécie de monogenético (Tereancistrum sp. n.). Os achados desse estudo expandem a distribuição geográfica dessas espécies de parasitos e ajudam a aumentar o conhecimento da biodiversidade desses organismos em diferentes hospedeiros e ambientes. De modo geral, a estrutura e composição da fauna parasitária de P. lineatus não pareceu ser influenciada por características estruturais dos dois trechos estudados, devido aos hábitos migratórios do hospedeiro.

Made available in DSpace on 2022-04-28T19:09:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The parasitic biodiversity of the Loricaria prolixa, an endemic fish from the Paraná and Prata basins was studied and analyzed the parasitic’s communities dynamics and their ecological relations with this host. Samples were collected in the Batalha River and 39 specimens were analyzed from 2014 to 2016. All fishes were parasitized. The component community was composed by twelve species with 8694 metazoan found on the surface, gills, eyes, brain, intestine and blood of the hosts. Demidospermus spirophallus, Diplostomidae gen. sp., Rhabdochona kidderi and Oligobdella sp. showed higher values for the parasitism's ecological descriptors, and were centrals and dominants species. The infracommunities were characterized by specific richness smaller in relation to diversity, and both superior to equitability (H’ = 0.94; J = 0.6; d = 0.83). There was a significant positive correlation between the host standard length and the parasite abundance of D. spirophallus, Diplostomidae gen. sp. and Oligobdella sp., while Procamallanus (Spirocamallanus) inopinatus presented a significant negative correlation. This is the first contribution concerning the parasite biodiversity of L. prolixa. Clinostomum detruncatum, Diplostomidae gen. sp., Austrodiplostomum compactum, R. kidderi, P. (S.) inopinatus, P. (S.) rebecae, Cucullanus pinnai pinnai, Oligobdella sp. and Trypanosoma sp. were first recorded in this host. Instituto de Biociências de Botucatu Universidade Estadual Paulista “Júlio de Mesquita Filho”, Rua Professor Doutor Antônio Celso Wagner Zanin, 250 Laboratório de Ictioparasitologia Central de Laboratórios de Ciência e Tecnologia Ambiental Universidade do Sagrado Coração Instituto de Biociências de Botucatu Universidade Estadual Paulista “Júlio de Mesquita Filho”, Rua Professor Doutor Antônio Celso Wagner Zanin, 250 FAPESP: 2012/23655-0 FAPESP: 2014/12862-0

Made available in DSpace on 2022-04-28T19:01:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-01-01 From March to April 2010, specimens of Acestrorhynchus lacustris were collected in the Peixe River, Anhembi, São Paulo State, Brazil. This characid, commonly known as peixe-cachorro, has a preference for lentic habitats and it features carnivorous habits, with an important role in the food chain. This study aimed to carry out a parasitological analysis of 34 specimens of A. lacustris, and 33 of these were infected by at least one species of metazoan parasite. Nine species were identified: Ameloblastella sp. and Diaphorocleidus sp. (Monogenea); Ascocotyle sp., Diplostomidae gen. sp. and Sphincterodiplostomum musculosum (Digenea); Contracaecum sp., Philometroides caudata, Procamallanus (Spirocamallanus) inopinatus and P. (S.) saofranciscensis (Nematoda). Except P. caudata and P. (S.) saofranciscensis, all parasites showed prevalence higher than 10%. There was a positive correlation between host weight and length and the Ameloblastella sp. Diaphorocleidus sp. was the dominant species. No species was considered central. All parasites showed an aggregated distribution. The parasite community of A. lacustris was characterized by high richness (d = 0.85) and uniformity (J’ = 0.85) and low diversity (HB = 0.56). Except Nematoda, all other parasites were recorded for the first time in this host. Ameloblastella sp., Diaphorocleidus sp. and Ascocotyle sp. are recorded for the first time in the Peixe River. Instituto de Biociências de Botucatu Universidade Estadual Paulista ‘Júlio de Mesquita Filho’ Universidade do Sagrado Coração Rua Irmã Arminda, 10-50 Instituto de Biociências de Botucatu Universidade Estadual Paulista ‘Júlio de Mesquita Filho’

In March 2010, 44 specimens of Astyanax altiparanae Garutti & Britski, 2000, commonly known as "lambari do rabo amarelo", collected from the Peixe river in the state of São Paulo, Brazil were analyzed. Out of these 44 fishes, 38 had at least one species of metazoan parasite. Fifteen metazoan parasites species were collected and identified: Urocleidoides trinidadensis , Diaphorocleidus kabatai , Diaphorocleidus orthodusus, Diaphorocleidus sp., Urocleidoides sp., Trinibaculum altiparanae , Gyrodactylus sp., Jainus hexops, Contracaecum sp., Procamallanus (Spirocamallanus) inopinatus, Vaigamus sp., Amplexibranchius bryconis, Ergasilus sp., Zonocotyloides haroltravassossi and Henneguya sp. Six species of parasites presented a prevalence of over 10%. Weight and length of fishes didn't influence the parasitism. All parasites presented an aggregated distribution. The parasite community of Astyanax altiparanae from the Peixe river was characterized as having high richness and low uniformity. RESUMO: Em março de 2010, foram coletados e analisados 44 espécimes de Astyanax altiparanae Garutti & Britski, 2000, conhecidos popularmente como lambari do rabo amarelo, provenientes do rio do Peixe, Estado de São Paulo, Brasil. Dos 44 peixes analisados, 38 estavam parasitados por pelo menos uma espécie de metazoário parasito. Quinze espécies de metazoários parasitos foram coletadas e identificadas: Urocleidoides trinidadensis, Diaphorocleidus kabatai , Diaphorocleidus orthodusus , Diaphorocleidus sp., Urocleidoides sp., Trinibaculum altiparanae, Gyrodactylus sp., Jainus hexops, Contracaecum sp., Procamallanus (Spirocamallanus) inopinatus, Vaigamus sp., Amplexibranchius bryconis, Ergasilus sp., Zonocotyloides haroltravassossi e Henneguya sp. Os parasitos D. kabatai , U. trinidadensis, J. hexops, P. (S.) inopinatus e Vaigamus sp. apresentaram prevalências superiores a 10%. O peso e o comprimento dos peixes não influenciaram no parasitismo. Todos os parasitos apresentaram distribuição agregada. A comunidade parasitária de Astyanax altiparanae proveniente do rio do Peixe foi caracterizada por alta riqueza e baixa uniformidade.

Geophagus brasiliensis is a freshwater cichlid distributed throughout the whole South America. It is a territorial fish, generally omnivorous, which preferentially inhabits the bottom of water bodies. Previous studies have reported species of digenetic trematodes parasitizing G. brasiliensis. This study identifies the Sphincterodiplostomum musculosum Dubois, 1936, a Diplostomidae digenetic, commonly found in many teleostean species. More than 50% of the hosts analyzed had their eyes infected with metacercariae of S. musculosum. A positive correlation was observed between the hosts standard length and the abundance of S. musculosum, a fact that corroborates with other studies on this parasite. This paper reports the first occurrence of S. musculosum in G. brasiliensis, which is also the first record in Dois Córregos City, São Paulo State, Brazil. RESUMO: Geophagus brasiliensis é um ciclídeo de água doce distribuído por toda a América do Sul. É um peixe territorialista, geralmente onívoro, que habita preferencialmente o fundo dos corpos d'água. Há o registro em trabalhos anteriores de espécies de digenéticos parasitando G. brasiliensis. O presente estudo traz a identificação de Sphincterodiplostomum musculosum Dubois, 1936, um diplostomídeo comumente encontrado em diversas espécies teleósteas. Mais de 50% dos hospedeiros analisados estavam com seus olhos parasitados com metacercárias de S. musculosum. Houve correlação positiva entre o comprimento padrão dos hospedeiros e a abundância de S. musculosum, fato que corrobora com outros trabalhos deste parasito. Este trabalho registra pela primeira vez a ocorrência de S. musculosum em G. brasiliensis, sendo também a primeira citação deste parasito na região de Dois Córregos, Estado de São Paulo, Brasil.

Current essay describes three new Monogenean species, namely, Cosmetocleithrum striatuli sp. nov., Jainus leporini sp. nov. and Rhabdosynochus guanduensis sp. nov., parasites on the gills of Trachelyopterus striatulus (Steindachner, 1877), Leporinus copelandii Steindachner, 1875 and Centropomus undecimalis (Bloch, 1792), respectively. Fish were collected from the Guandu river, State of Rio de Janeiro, Brazil between August 2005 and November 2008. Cosmetocleithrum striatuli sp. nov. differs from all other congeneric species by the shape of an accessory piece (more robust and resembling a crustacean claw or chela) and by the shape of its ventral and dorsal bars (not V-shaped and with expanded lateral ends directed to the rear). Jainus leporini sp. nov. differs from all other Jainus species by the male copulation organ (MCO), with a 2-ring coil, by the absence of medial projection on ventral bar and by a plate-like sclerotized structure associated to the vagina. Rhabdosynochus guanduensis sp. nov. differs from all other congeneric species by the morphology of the copulation complex and by a shell-shaped vagina.

The qualitative and quantitative analyses of diplostomid metacercariae in Geophagus brasiliensis (Quoy & Gaimard, 1824) of the Guandu river, Seropédica, Rio de Janeiro, Brazil, are provided. Between April 2006 and March 2007, 200 specimens of G. brasiliensis were collected and necropsied. Further, five morphotypes of diplostomid metacercariae were obtained, namely, Austrodiplostomum compactum, Diplostomum sp., Posthodiplostomum sp. 1, Posthodiplostomum sp. 2 and Neascus type 1. Whereas the metacercariae of Diplostomum sp., Posthodiplostomum sp. 1 and Posthodiplostomum sp. 2 were described, a new site of infection of A. compactum was registered and a new geographical report for Neascus type 1, responsible for the black-spot disease, has been added. Current investigation enhances the importance of G. brasiliensis as an intermediate host of diplostomid trematodes and the diversity of these larvae in the Guandu river. O presente trabalho teve como objetivo o estudo qualitativo e quantitativo das metacercárias de diplostomídeos em Geophagus brasiliensis (Quoy & Gaimard, 1824) do rio Guandu, Seropédica, Rio de Janeiro, Brasil. Entre abril de 2006 e março de 2007, foram coletados e necropsiados 200 espécimes de G. brasiliensis, sendo obtidos cinco morfotipos de metacercárias de diplostomídeos: Austrodiplostomum compactum, Diplostomum sp., Posthodiplostomum sp. 1, Posthodiplostomum sp. 2 e Neascus tipo 1. No presente trabalho, foram descritas as metacercárias de Diplostomum sp., Posthodiplostomum sp. 1 e Posthodiplostomum sp. 2, além de registrar novo sítio de infecção de A. compactum e aumentar o conhecimento da distribuição geográfica de Neascus tipo 1, causadora da doença dos pontos pretos. O presente trabalho aponta para a importância de G. brasiliensis como hospedeiro intermediário de trematódeos diplostomídeos e sobre a diversidade dessas larvas no rio Guandu.

Made available in DSpace on 2016-04-28T20:16:28Z (GMT). No. of bitstreams: 1 2009 - Vanessa Doro Abdallah.pdf: 3833672 bytes, checksum: 322601a1d1e2505642c0eda34de72fd6 (MD5) Previous issue date: 2009-02-19 Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq 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. Entre o per?odo de agosto de 2005 a agosto de 2007 foram coletados e analisados 565 esp?cimes de peixes, pertencentes a vinte esp?cies, provenientes do Rio Guandu, pr?ximo ? barragem da Esta??o de tratamento de ?gua (ETA) (22?48 32 S, 43?37 35 W), Estado do Rio de Janeiro, com o objetivo de obter um maior conhecimento da biodiversidade dos monogen?ticos do Rio Guandu e fazer um estudo taxon?mico dos mesmos, em fun??o da import?ncia estrat?gica deste rio no Estado do Rio de Janeiro. Das 20 esp?cies de peixes estudadas no presente trabalho, 13 estavam parasitadas por monogen?ticos. Todos os monogen?ticos encontrados estavam parasitando as br?nquias dos hospedeiros. Um total de 24 esp?cies de monogen?ticos foram encontradas, sendo 18 pertencentes ? fam?lia Dactylogyridae Bychowsky, 1933, quatro pertencentes ? fam?lia Gyrodactylidae Van Beneden e Hesse, 1863 e duas pertencentes ? fam?lia Diplectanidae Monticelli, 1903. Os peixes pertencentes ?s fam?lias Auchenipteridae, Cichlidae, Heptapteridae, Mugilidae e Pimelodidae foram parasitados exclusivamente por monogen?ticos da fam?lia Dactylogyridae. As esp?cies da fam?lia Centropomidae foram parasitadas somente por monogen?ticos pertencentes ? fam?lia Diplectanidae. As esp?cies estudadas das fam?lias Anostomidae, Characidae e Loricariidae foram parasitadas pelos monogen?ticos das fam?lias Dactylogyridae e Gyrodactylidae. No presente trabalho est?o sendo descritas seis esp?cies novas de monogen?ticos, sendo uma esp?cie de Jainus, quatro esp?cies de Ligophorus e uma esp?cie de Rhabdosynochus, parasitando respectivamente Leporinus copelandii Steindachner, 1875, Mugil liza Valenciennes, 1836 e Centropomus undecimalis (Bloch, 1792). No presente trabalho foram realizados 12 novos registros de hospedeiros e 21 novos registros de localidade.

Fifty specimens of acar・Geophagus brasiliensis (Quoy and Gaimard, 1824) from Guandu River, (22ｰ48’32”S, 43ｺ37’35”W), Rio de Janeiro State, Brazil were studied for their metazoan parasites during December 2004 and November 2005. A total of nine species of metazoan parasites were collected. Posthodiplostomum macrocotyle Dubois, 1937 (metacercariae) found in the eyes, was the most prevalent species (88%) with the highest mean intensity value (12.4), followed by the metacercariae of Austrodiplostomum compactum (Lutz, 1928) and the hirudinean Glossiphoniidae gen. sp. showing prevalence of 14% and 10%, respectively. No parasite species showed significant correlation between the total body length of the host and their prevalence. Posthodiplostomum macrocotyle showed significant correlation between the total body length of the host and their abundance. The sex of the hosts influenced the abundance of P. macrocotyle, A. compactum and Glossiphoniidae gen. sp. being the females the most parasited. The parasite species’ richness showed a mean value of 1.24ｱ0.69 (0-3). The parasite species showed an aggregated distribution pattern. Foram estudados 50 acarás Geophagus brasiliensis (Quoy e Gaimard, 1824) provenientes do rio Guandu, coletados próximo ・barragem da Estação de Tratamento de àgua (ETA) (22º48’32”S, 43º37’35”O), no Estado do Rio de Janeiro, no período de dezembro de 2004 ・novembro de 2005. Nove espécies de metazoários parasitos foram coletadas. O digenético Posthodiplostomum macrocotyle Dubois, 1937 (metacercária) foi a espécie mais prevalente (88%) e com a maior intensidade média (12,4), sendo a maioria dos espécimes encontrados parasitando os olhos, seguida pela metacercária Austrodiplostomum compactum (Lutz, 1928) e pelo hirudíneo Glossiphoniidae gen. sp., que apresentaram prevalências de 14% e 10%, respectivamente. Nenhum parasito apresentou correlação significativa entre o comprimento total do corpo do hospedeiro e sua prevalência. Posthodiplostomum macrocotyle apresentou correlação significativa entre o comprimento total do corpo do hospedeiro e sua abundância. O sexo dos hospedeiros influenciou a abundância de P. macrocotyle, A. compactum e Glossiphoniidae gen. sp., sendo as fêmeas as mais parasitadas. A riqueza parasitária apresentou uma média de 1,24±0,69 (0-3). Os parasitos apresentaram um padrão de distribuição agregado.

One hundred specimens of tamboatá Hoplosternum littorale (Hancock, 1828) from Guandu River, (22°48’32”S, 43º37’35”W), Rio de Janeiro state, Brazil were studied as for their metazoan parasites during May 2004 and February 2005. A total of eight species of metazoan parasites were collected and identified. Kalipharynx sp. was the most prevalent species (61.0%), followed by Glossiphoniidae gen. sp. (20%) and the progenetic metacercariae of Herpetodiplostomum caimancola (Dollfus, 1935) (11%). No parasite species showed significant correlation between the total body length of the host and their abundance. The sex of the hosts influenced the abundance of Kalipharynx sp., being the males the most parasited. The mean parasite species’ richness showed low values (1.59 ± 1.09 (0-3)). The parasite species presented an aggregated distribution pattern. Foram estudados 100 tamboatás Hoplosternum littorale (Hancock, 1828) provenientes do rio Guandu, coletados próximo à barragem da Estação de tratamento de água (ETA) (22°48’32”S, 43º37’35”O), no Estado do Rio de Janeiro, no período de maio de 2004 à fevereiro de 2005. Oito espécies de metazoários parasitos foram coletadas e identificadas. O digenético Kalipharynx sp. foi a espécie mais prevalente (61%), seguido pelo hirudíneo Glossiphoniidae gen. sp. (20%) e a metacercária progenética de Herpetodiplostomum caimancola (Dollfus, 1935) (11%). Nenhum parasito apresentou correlação significativa entre o comprimento total do corpo do hospedeiro e sua abundância. O sexo dos hospedeiros influenciou a abundância de Kalipharynx sp., sendo os machos os mais parasitados. A riqueza parasitária média apresentou valores baixos (1,59 + 1,09 (0-3)). Os parasitos apresentaram um padrão de distribuição agregado.