Helminths of freshwater fishes in the reservoir of the Hydroelectric Power Station of Itaipu, Paraná, Brazil

This study presents results from several expeditions in 1985, 1991-1995 and 2003 to the Medium Paraná River in the section that begins below the Itaipu Dam and ends at the trinational border of Brazil, Argentina and Paraguay, in the lotic and lentic zones of the reservoir of the Hydroelectric Power Station of “Itaipu Binacional” (localities Foz do Iguaçu, Santa Helena and Guaira). Ninety-eight species of freshwater fishes belonging to 22 families were examined for helminths. A host-parasite list based on Acanthocephala, Cestoda, Digenea, Monogenea and Nematoda collected from the region in question is provided. New host records are presented for Digenea and Nematoda. The Monogenea and Acanthocephala are being studied and will be published in a later paper, but are referred in the host-parasite list, in order to demonstrate the parasitism in the fishes of the reservoir. The results are compared with those presented by other authors from the Upper Paraná River.

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Endohelminths in Cichla piquiti(Perciformes, Cichlidae) from the Paraná River, São Paulo State, Brazil

Revista Brasileira de Parasitologia Veterinária ◽

10.1590/s1984-29612013000400006 ◽

2013 ◽

Vol 22 (4) ◽

pp. 475-484 ◽

Cited By ~ 12

Author(s):

Lidiane Franceschini ◽

Aline Cristina Zago ◽

Maria Conceição Zocoller-Seno ◽

Rosicleire Veríssimo-Silveira ◽

Alexandre Ninhaus-Silveira ◽

...

Keyword(s):

Parasite Species ◽

Paraná River ◽

Hydroelectric Power Station ◽

Hydroelectric Power ◽

New Host ◽

Parana River ◽

Third Stage ◽

Host Parasite Relationship ◽

Parasite Relationship ◽

Host Parasite

Fifty specimens of Cichla piquiti were collected from the Paraná River downstream of the Ilha Solteira Hydroelectric Power Station in Brazil and surveyed for endohelminth parasites. All fish were parasitised by at least one helminth species (overall prevalence [P] = 100%). Eight parasite taxa were present: the nematode Procamallanus(Procamallanus) peraccuratus in the intestines; third-stage larvae of the anisakids Contracaecumsp. and Hysterothylacium sp. in the visceral cavity, mesentery and serosa of the stomach and intestines and on the liver and spleen; the trematodes Austrodiplostomum compactum in the eye (metacercariae) and Genarchella genarchella in the stomach; and the cestodes Proteocephalus macrophallus, Proteocephalus microscopicus, and Sciadocephalus megalodiscus in the intestines. Hysterothylaciumsp. larvae (P = 86%) and P. microscopicus (P = 74%) were the most prevalent parasites. Anisakids were more prevalent and abundant in the dry season. A negative correlation between the abundances of Hysterothylacium sp. and P. microscopicuswas observed, suggesting a competitive/antagonistic relationship between these parasites. Cichla piquiti represents a new host for four parasite species. These new records significantly increase the list of parasites of C. piquiti, contributing to the knowledge of the host-parasite relationship and the geographical distribution of these helminths.

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Parasitism by Monogenoidea in Piaractus mesopotamicus (Characiformes, Characidae) cultivated in Paraná River (Brazil)

Brazilian Journal of Biology ◽

10.1590/1519-6984.00916 ◽

2017 ◽

Vol 77 (4) ◽

pp. 787-793 ◽

Cited By ~ 1

Author(s):

M. S. L. Leão ◽

M. C. N. Justo ◽

G. W. Bueno ◽

S. C. Cohen ◽

S. C. São Clemente

Keyword(s):

Distribution Pattern ◽

Paraná River ◽

Hydroelectric Power Station ◽

Hydroelectric Power ◽

Power Station ◽

Piaractus Mesopotamicus ◽

Mean Intensity ◽

Parana River ◽

Total Length ◽

Parasite Distribution

Abstract This study investigated the occurrence, prevalence, mean abundance and mean intensity of monogenoidean parasites in Piaractus mesopotamicus farmed in cages in the reservoir of the Itaipu Hydroelectric Power Station, Paraná River, Brazil. The parasite distribution pattern and the correlation of prevalence and abundance with the total length of hosts were also investigated. Four monogenoidean species were collected: Anacanthorus penilabiatus, A. toledoensis, Mymarothecium ianwhitingtoni and M. viatorum. All the parasites collected in P. mesopotamicus showed the typical aggregated distribution pattern, and the abundance and the prevalence did not shown any correlation with the total length of hosts.

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Redescription of Rhipidocotyle jeffersoni (Kohn, 1970) Overstreet & Curran, 2002 (Digenea: Bucephalidae)

Zootaxa ◽

10.11646/zootaxa.1193.1.2 ◽

2006 ◽

Vol 1193 (1) ◽

pp. 41-47

Author(s):

ANNA KOHN ◽

BERENICE M.M. FERNANDES

Keyword(s):

Paraná River ◽

Morphological Data ◽

Hydroelectric Power Station ◽

Hydroelectric Power ◽

Power Station ◽

Type Host ◽

Parana River ◽

Salminus Brasiliensis

Rhipidocotyle jeffersoni (Kohn, 1970) Overstreet & Curran, 2002 is redescribed, based on the holotype and on additional specimens from the intestine of the type-host Salminus brasiliensis (= S. maxillosus) (Characidae), collected at different dates and from several localities of the Paraná River and the hydroelectric power station reservoir of Itaipu, Paraná State, Brazil. Rhipidocotyle jeffersoni is compared with all other species in the genus to confirm its validity. New morphological data, such as different positions of the ovary, testes and caeca, and the extent of the uterus are presented and considered to be specific variations.

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Preliminary data on the feeding habits of the freshwater stingrays Potamotrygon falkneri and Potamotrygon motoro (Potamotrygonidae) from the Upper Paraná River basin, Brazil

Biota Neotropica ◽

10.1590/s1676-06032007000100027 ◽

2007 ◽

Vol 7 (1) ◽

pp. 221-226 ◽

Cited By ~ 15

Author(s):

Thiago Buosi Silva ◽

Virgínia Sanches Uieda

Keyword(s):

Feeding Habits ◽

River System ◽

Paraná River ◽

Hydroelectric Power Station ◽

Hydroelectric Power ◽

Parana River ◽

Food Items ◽

Paraguay River ◽

Upper Paraná River ◽

Specialized Diet

Stingrays of the Potamotrygonidae family are a singular group of Neotropical ichthyofauna. Although ancient reports exist about the group, there are still many questions that need to be clarified, such as the biology of the species that occur in the Paraná-Paraguay River system. In the present work, the diet of Potamotrygon falkneri and Potamotrygon motoro, captured in the Upper Paraná River, downstream from the Engenheiro Souza Dias Hydroelectric Power Station (UHE Jupiá), was analyzed. Both species showed a diversified diet, consisting of 14 food items, including Mollusca, Crustacea, Insecta and fish, with the predominance in diversity and abundance of aquatic insects. Only one individual of each species ingested fish. Potamotrygon motoro consumed mainly Ephemeroptera, while P. falkneri consumed mainly Mollusca, Hemiptera and Trichoptera. The data apparently indicate a more specialized diet for P. motoro, consuming more Ephemeroptera (Baetidae), and a more generalized diet for P. falkneri. The analysis of individuals captured in three microhabitats that differ in function of the substrate type and presence of marginal vegetation, suggests differences in the food items consumed.

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On some trematodes parasites of fishes from Paraná River

Brazilian Journal of Biology ◽

10.1590/s1519-69842001000300016 ◽

2001 ◽

Vol 61 (3) ◽

pp. 461-466 ◽

Cited By ~ 15

Author(s):

B. M. M. FERNANDES ◽

A. KOHN

Keyword(s):

South America ◽

Original Description ◽

Paraná River ◽

New Host ◽

Parana River ◽

Geophagus Brasiliensis ◽

First Time ◽

New Host Records

Crassicutis cichlasomae Manter, 1936 is redescribed for the first time in South America and from a new host: Geophagus brasiliensis (Cichlidae). Iheringtrema iheringi Travassos, 1948 is redescribed for the first time since its original description from Pseudopimelodus zungaro (Pimelodidae); and new host records are referred to Genarchella genarchella Travassos et al., 1928, and to Parspina argentinensis (Szidat, 1954). Other reported species are: Microrchis oligovitellum Lunaschi, 1987, Neocladocystis intestinalis (Vaz, 1932), Pseudosellacotyla lutzi (Freitas, 1941), Thometrema overstreeti (Brooks et al., 1979) and Zonocotyle bicaecata Travassos, 1948. Original figures and measurements are presented.

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Gyrodactylidae (Monogenea: Platyhelminthes) gill parasites of Tetragonopterinae (Characiformes: Characidae) from the upper Paraná River floodplain, Brazil

Acta Limnologica Brasiliensia ◽

10.1590/s2179-975x3817 ◽

2017 ◽

Vol 29 (0) ◽

Author(s):

Eloiza Muniz Capparros ◽

Ricardo Massato Takemoto

Keyword(s):

Host Species ◽

Geographic Area ◽

Paraná River ◽

New Host ◽

River Floodplain ◽

Parana River ◽

Upper Paraná River Floodplain ◽

Upper Paraná River ◽

The Difference ◽

Paraná River Floodplain

Abstract Aim: This study records Gyrodactylus neotropicalis and Anacanthocotyle anacanthocotyle in new hosts: Astyanax lacustris and Moenkhausia forestii, on the upper Paraná river floodplain. Besides, ecological aspects of the parasites distribution are explored. Methods Both host species were collected between March and September 2014; monogeneans were removed from the gills using a stereo-microscope and mounted in Hoyer or stained with Gomori’s trichrome and mounted in Balsam of Canada. Illustrations were prepared on a phase contrast microscope. Monogeneans were identified using the appropriate literature. Prevalance, abundance, mean intensity and intensity range were calculated to parasite species in each host. Results Gyrodactylus neotropicalis and Anacanthocotyle anacanthocotyle are recorded in new geographic area, upper Paraná River floodplain, in new host species, A. lacustris and M. forestii and in new infection site, gills. A. anacanthocotyle occur in higher prevalence, abundance and intensity parasitizing A. lacustris, while G. neotropicalis presented higher prevalence, abundance and intensity in M. forestii. Discussion Gyrodactylus neotropicalis described by Kritsky & Fritts, 1970, parasite of Astyanax fasciatus (Cuvier), presented a different shield position between anchors than the specimens studied here; A. anacanthocotyle also described by Kritsky & Fritts, 1970 presented spicules in the cephalic region, what was not observed in the specimens studied here. Plasticity in parasitism may explain the difference between monogenean in different hosts. Conclusion Until now, there was no record of this Gyrodactylidae species parasitizing Characidae fish in South America. Those parasites are the first Gyrodactylidae monogeneans described from A. lacustris and M. forestii.

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A case of complete albinism in the catfish Cambeva guareiensis (Siluriformes: Trichomycteridae)

Biota Neotropica ◽

10.1590/1676-0611-bn-2020-1066 ◽

2020 ◽

Vol 20 (4) ◽

Author(s):

Valter M. Azevedo-Santos ◽

Fernando M. Pelicice ◽

Ivan Sazima ◽

Raoul Henry

Keyword(s):

River Basin ◽

Freshwater Fishes ◽

Color Pattern ◽

Paraná River ◽

Southeastern Brazil ◽

Parana River ◽

Upper Paraná River ◽

Upper Paraná River Basin ◽

Paraná River Basin

Abstract: Albinism has been recorded in Neotropical freshwater fishes, mostly for nocturnal or cryptobiotic species. We report herein a case of albinism in the catfish Cambeva guareiensis (Trichomycteridae) from the Guareí River basin, Upper Paraná River basin, southeastern Brazil. The albino fish was caught with seven individuals with typical color pattern of the species. The features of the albino fish in life and shortly after preservation are described and illustrated.

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