Aug 13, 2004

Habitat fragmentation causes bottlenecks and inbreeding in the European tree frog (Hyla arborea)

Proceedings. Biological Sciences
Liselotte W AndersenChristian Damgaard

Abstract

A genetic study of the European tree frog, Hyla arborea, in Denmark was undertaken to examine the population structure on mainland Jutland and the island of Lolland after a period of reduction in suitable habitat and population sizes. The two regions have experienced the same rate of habitat loss but fragmentation has been more severe on Lolland. Genetic variation based on 12 polymorphic DNA microsatellites was analysed in 494 tree frogs sampled from two ponds in Jutland and 10 ponds on Lolland. A significant overall deviation from Hardy-Weinberg expectations could be attributed to three ponds, all on Lolland. This was most probably caused by an inbreeding effect reducing fitness, which was supported by the observed significant negative correlation between larva survival and mean F(IS) value and mean individual inbreeding coefficient. A significant reduction in genetic variation (bottleneck) was detected in most of the ponds on Lolland. Population-structure analysis suggested the existence of at least 11 genetically different populations, corresponding to most of the sampled population units. The results indicated that the populations were unique genetic units and could be used to illustrate the migration pattern between newly ...Continue Reading

Mentioned in this Paper

Short Tandem Repeat
Animal Migration
Abnormal Fragmented Structure
Likelihood Functions
Salientia
Genetics, Population
Etiology
Larva
Human Geography
Treefrog

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