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Estimation of the prevalence of outcrossing in the hermaphrodite trematode Lecithochirium rufoviride by allozyme analysis

100%

Vilas R., Paniagua E.

Acta Parasitologica

2004

tom 49

nr 1

The relative occurrence of outcrossing in two geographical populations of the digenetic trematode Lecithochirium rufoviride was investigated using starch gel electrophoresis to study the polymorphic locus Pgm-1. Assuming that the effects of mutation, genetic drift and natural selection on this locus are negligible, allozyme variation suggests the occurrence of extensive outcrossing in both populations, Ria de Arousa and Lianes (North of Spain). Therefore, the minimum outcrossing rate giving no statistically significant deviation respect to Hardy-Weinberg equilibrium was 70% and 66%, respectively. Despite of the asexual reproduction in the snail host, the possibility of self-fertilization as a component of the breeding system of this hermaphroditic helminth, and a population reproductive structure probably influenced by the habitat fragmentation, these results suggest that populations of this species in the definitive host, the European conger eel (Conger conger), are basically panmictic.

Relation between winter, breeding and moulting grounds-general applicability of local field studies of Mute Swans [Cygnus olor] on the Swedish West-coast

84%

Mathiasson S.

The Ring

1993

tom 15

nr 1-2

Ograniczanie wyników

1 Acta Parasitologica

1 The Ring

1 Mathiasson S.

1 Paniagua E.

1 Vilas R.

1 2004

1 1993

Wyniki wyszukiwania

Estimation of the prevalence of outcrossing in the hermaphrodite trematode Lecithochirium rufoviride by allozyme analysis

Relation between winter, breeding and moulting grounds-general applicability of local field studies of Mute Swans [Cygnus olor] on the Swedish West-coast