Metacercariae of Austrodiplostomum compactum (Trematoda, Diplostomidae) in non-native fish species in Brazil: a possible explanation for the high rate of parasitic infection
Document title: Metacercariae of Austrodiplostomum compactum (Trematoda, Diplostomidae) in non-native fish species in Brazil: a possible explanation for the high rate of parasitic infection
Journal: Anais da Academia Brasileira de Ciencias
Database: PERIÓDICA
System number: 000436040
ISSN: 0001-3765
Authors: 1
2
2
2
Institutions: 1Universidade Estadual Paulista "Julio de Mesquita Filho", Faculdade de Engenharia, Ilha Solteira, Sao Paulo. Brasil
2Universidade Estadual Paulista "Julio de Mesquita Filho", Instituto de Biociencias, Botucatu, Sao Paulo. Brasil
Year:
Volumen: 92
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Analítico, descriptivo
English abstract Metacercariae of Diplostomidae are widely distributed in America and may cause diplostomiasis, an ocular disease in fishes. The aim of this study is to report the occurrence of metacercariae of Austrodiplostomum compactum in Plagioscion squamosissimus (non-native fish species) from Nova Avanhandava Reservoir, Tietê River, Brazil and an explanation for the high infection rates with this parasite in the Paraná River Basin is proposed. Eyes of 70 hosts were examined, the metacercariae were preserved and identified. The prevalence (P), mean intensity of infection (MII) ± standard deviation, mean abundance (MA) ± standard deviation, were calculated and a bibliographic review was performed. There was no difference in parasitism between male and female hosts. The values of P = 80%, MII = 21.55 ± 3.25 and MA = 17.24 ± 2.91 were high, as in most studies in areas where P. squamosissimus were introduced, while these values were low in areas of natural occurrence. This may be explained by the genetic susceptibility of the host to the parasite. The entire population of P. squamosissimus from the Upper Paraná has been founded by a few specimens, resulting in very low genetic variability. Consequently, the population may be highly susceptible to A. compactum
Disciplines: Biología
Keyword: Parasitología,
Helmintos,
Peces,
Peces de agua dulce,
Especies introducidas,
Parásitos de peces,
Metacercarias,
Plagioscion squamosissimus,
Sciaenidae,
Austrodiplostomum compactum,
Trematoda,
Brasil
Keyword: Parasitology,
Helminths,
Fish,
Freshwater fish,
Introduced species,
Fish parasites,
Metacercariae,
Plagioscion squamosissimus,
Sciaenidae,
Austrodiplostomum compactum,
Trematoda,
Brazil
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