Variation in the Morphometrics of Diplostomid Metacercariae (Digenea: Trematoda) Infecting the Catfish, Clarias Gariepinus in Tanzania

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dc.contributor.authorChibwana, F. D.
dc.contributor.authorNkwengulila, Gamba
dc.date.accessioned2016-04-12T13:13:05Z
dc.date.available2016-04-12T13:13:05Z
dc.date.issued2010
dc.description.abstractDiplostomum species are economically important worldwide due to their metacercariae which parasitize the eyes of fish, in both natural and aquaculture systems. However, their striking morphological similarity, especially at the metacercarial stage, makes species separation difficult. Three closely related diplostomid metacercariae, namely Diplostomum mashonense (type 3), Tylodelphys sp. 1 and 2 (type 1 and 2, respectively), coexist in the cranial cavity of the catfish, Clarias gariepinus from Mindu dam, Lake Victoria, Msimbazi, Ruvu and Kilombero rivers. The morphometrics of these three species were analysed by discriminant function analysis to investigate the degree of variation among the populations from the five localities sampled. The first canonical functions for all visual examination plots accounted for over 50% of the between-group variability. The observed differences were mainly from measurements associated with length, indicating that these measurements are important in the description of population characteristics. Visual examination of the samples along the canonical functions showed a clear between-population differentiation. The overall random assignment of individuals into their original groups was high (97%). These extensive morphometric variations introduce doubt about the reliability of measurements in the determination of species in these trematodes, as they may lead to misidentifications.en_US
dc.identifier.citationChibwana, F.D. and Nkwengulila, G., 2010. Variation in the morphometrics of diplostomid metacercariae (Digenea: Trematoda) infecting the catfish, Clarias gariepinus in Tanzania. Journal of Helminthology, 84(01), pp.61-70.en_US
dc.identifier.doi10.1017/S0022149X09990083
dc.identifier.urihttp://hdl.handle.net/123456789/1502
dc.language.isoenen_US
dc.publisherCambridge University Pressen_US
dc.subjectDiplostomumen_US
dc.subjectMetacercariaeen_US
dc.subjectPopulationen_US
dc.subjectMorphometricen_US
dc.titleVariation in the Morphometrics of Diplostomid Metacercariae (Digenea: Trematoda) Infecting the Catfish, Clarias Gariepinus in Tanzaniaen_US
dc.typeJournal Article, Peer Revieweden_US
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