Patologia de peixes da Amazônia Brasileira, 1. Aspectos gerais

Thatcher, Vernon E.

doi:10.1590/1809-43921981111125

Cited by 22 publications

(21 citation statements)

References 4 publications

(4 reference statements)

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“…Many parasites can live on the host without causing any damage (THATCHER, 1981). In the present study, ectoparasitism by Monogenea did not alter the hematological parameters of H. malabaricus.…”

Section: Discussioncontrasting

confidence: 47%

Hematological parameters of Hoplias malabaricus (Characiformes: Erythrinidae) parasitized by Monogenea in lagoons in Pirassununga, Brazil

Corrêa

Karling

Takemoto

et al. 2013

Rev. Bras. Parasitol. Vet.

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Hematology is an important pathological and diagnostic tool. This paper describes the hematological parameters of 76 specimens of Hoplias malabaricus infested with monogenean parasites, which were collected from two lagoons. The hematological parameters included: erythrocyte count (Er), microhematocrit (Hct), hemoglobin (Hb), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC). The blood parameters showed no significant changes associated with the infestation. Water temperature was found to be negatively correlated with MCV and Hct, with values of r s = -0.52, p<0.0001 and r s = -0.48, p<0.0001, respectively. The mean Relative Condition Factor was Kn=1.01, indicating good health conditions of the fish in these lagoons. No correlation was found between the monogenean infestation and the blood parameters, or between the environmental factors and the monogeneans.Keywords: Parasites, blood cells, freshwater fish. ResumoA hematologia é uma importante ferramenta para patologia e diagnóstico. O presente estudo teve como objetivo descrever os parâmetros hematológicos de 76 espécimes de Hoplias malabaricus, coletados em duas lagoas, associados ao parasitismo por monogenético. Os parâmetros hematológicos foram: contagem de eritrócitos (Er), micro hematócrito (Hct), hemoglobina (Hb), volume corpuscular médio (VCM), hemoglobina corpuscular (HCM) e a concentração da hemoglobina cospuscular média (CHCM). Observou-se que não ocorreram mudanças significativas nos parâmetros sanguíneos relacionados com o parasitismo. Houve uma correlação negativa entre a temperatura da água o VCM e Hct, com valores de r s = -0,52, p<0,0001 e r s = -0,48, p<0,0001, respectivamente. O valor médio entre o fator de condição relativo foi de Kn = 1,01, indicando boas condições e os peixes estavam saudáveis nas lagoas estudadas. Não houve relação entre a infestação de monogeneas e os parâmetros sanguíneos, ou entre os fatores ambientais e as monogeneas.Palavras-chave: Parasitas, células sanguíneas, peixes de água doce.

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Section: Discussioncontrasting

confidence: 47%

Hematological parameters of Hoplias malabaricus (Characiformes: Erythrinidae) parasitized by Monogenea in lagoons in Pirassununga, Brazil

Corrêa

Karling

Takemoto

et al. 2013

Rev. Bras. Parasitol. Vet.

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“…Metacercariae of Clinostomum marginatum (Rudolphi, 1819) were found in the fins of G. brasiliensis. There are previous records of this parasite in other species of cichlids such as Cichla ocellaris (Bloch & Schneider, 1801) and Crenicichla sp., in their gills, skin and fins (THATCHER, 1981). Clinostomum sp.…”

Section: Discussionmentioning

confidence: 99%

Metazoan parasites of Geophagus brasiliensis (Perciformes: Cichlidae) in Patos lagoon, extreme south of Brazil

Rassier

Pesenti

Júnior

et al. 2015

Rev. Bras. Parasitol. Vet.

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This study has evaluated the parasitic fauna of 79 pearl cichlids (Geophagus brasiliensis) from the estuary of Patos Lagoon (31° 57' S and 52° 06' W), Rio Grande do Sul, Brazil, during the months of May and June in 2011 and 2012. All the hosts analyzed were infected with at least one species of parasite. A total of eleven metazoa were identified in 459 specimens collected. The trematode Austrodiplostomum compactum (34.2%) and ergasilids Ergasilus lizae (32.9%) and Gauchergasilus lizae (32.9%) were the most prevalent species. The trematodes Thometrema overstreeti and Posthodiplostomum sp. had significantly higher prevalence in fish longer than 20 cm. The sex of the host had no effect on parasite prevalence and abundance. Pearl cichlids are registered as a new host for the trematodes Lobatostoma sp., Homalometron pseudopallidum and Thometrema overstreeti, for the ergasilids Ergasilus lizae and Gauchergasilus euripedesi and for the argulid Argulus spinolosus. The crustacean E. lizae is recorded in Rio Grande do Sul for the first time.

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“…inquirenda and G. agostinhoi (described in PAVANELLI & REGO 1989, 1991and PAVANELU & SANTOS 1991 were re-evaluated by scanning electron microscopy (SEM): metascoleces were absent consequently they cannot be classified as Goezeella. One genus is proposed, Chambriella gen.n.…”

mentioning

confidence: 99%

Cestodes in South American freshwater teleost fishes: keys to genera and brief description of species

1999

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Keys to genera of cestodes in South American freshwater teleost fishes are provided, with diagnoses of genera and short descriptions of species. Two new genera are proposed, Chambriella gen.n. for Goezeella agostinhoi Pavanelli & Santos, 1992 and G paranaensis Pavanelli & Rego, 1989, and Brooksiella gen.n. for Amphoteromorphus praeputialis Rego, Santos & Silva, 1974. Nomimoscolex magna Rego, Santos & Silva, 1974, previously species inquirenda, is transferred to the genus Proteocephalus Weinland, 1858. Goezeella nupeliensis Pavanelli & Rego, 1989 is considered a species inquirenda. Species and host lists are included

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Patologia de peixes da Amazônia Brasileira, 1. Aspectos gerais

Cited by 22 publications

References 4 publications

Hematological parameters of Hoplias malabaricus (Characiformes: Erythrinidae) parasitized by Monogenea in lagoons in Pirassununga, Brazil

Hematological parameters of Hoplias malabaricus (Characiformes: Erythrinidae) parasitized by Monogenea in lagoons in Pirassununga, Brazil

Metazoan parasites of Geophagus brasiliensis (Perciformes: Cichlidae) in Patos lagoon, extreme south of Brazil

Cestodes in South American freshwater teleost fishes: keys to genera and brief description of species

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