Comparative population genetic structure of a parasite (Fascioloides magna) and its definitive host

The population genetic structure of the American liver fluke, Fascioloides magna, and its definitive host the white-tailed deer, Odocoileus virginianus, was examined in South Carolina. Flukes were significantly more common in deer from river-swamp habitat than upland areas and prevalence increased w...

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Bibliographic Details
Published in:Evolution 1991-11, Vol.45 (7), p.1628-1640
Main Authors: Mulvey, M. (Wake Forest University, Winston-Salem, NC), Aho, J.M, Lydeard, C, Leberg, P.L, Smith, M.H
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Biology
CAROLINA DEL SUR
CAROLINE DU SUD
CERF DE VIRGINIE
Deer
ESTRUCTURA DE LA POBLACION
Evolution
Evolutionary genetics
FASCIOLOIDES MAGNA
Fundamental and applied biological sciences. Psychology
Genetic loci
genetic population structure
GENETIC VARIATION
GENETICA
GENETICS
Genetics of eukaryotes. Biological and molecular evolution
GENETIQUE
Genotypes
HOST PARASITE RELATIONS
host‐parasite relationships
Invertebrata
liver fluke
ODOCOILEUS VIRGINIANUS
Parasite hosts
Parasites
Population genetics
Population genetics, reproduction patterns
POPULATION STRUCTURE
RELACIONES HUESPED PARASITO
RELATION HOTE PARASITE
Snails
SOUTH CAROLINA
STRUCTURE DE LA POPULATION
VARIACION GENETICA
VARIATION GENETIQUE
VENADO COLA BLANCA
WHITE TAILED DEER
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Summary:The population genetic structure of the American liver fluke, Fascioloides magna, and its definitive host the white-tailed deer, Odocoileus virginianus, was examined in South Carolina. Flukes were significantly more common in deer from river-swamp habitat than upland areas and prevalence increased with host age. The distribution of flukes among deer occurred as a negative binomial with the mean dispersion parameter, k, equal to 0.17 and the range from 0.10 to 1.11 within local areas. Significant spatial genetic differentiation was observed for flukes and deer. Patterns of genetic distance in flukes were not concordant with those of the definitive host nor were they related to geographic distance between sample locations. Spatial genetic differentiation among flukes reflected the tendency for individual hosts to harbor multiple individuals from a limited number of parasite clones. The large population size of the parasite and movements of the definitive host tend to counteract factors that lead to spatial differentiation.
ISSN:0014-3820
1558-5646
DOI:10.1111/j.1558-5646.1991.tb02668.x