Genetic interchange of Dreissena polymorpha populations across a canal

Article Abstract:

Dreissena polymorpha, zebra mussel, populations and their genetic interchange across a canal are discussed. The mussel species has been invading western Central Europe for about two centuries, coming from the Pontocaspian by two routes interconnected by large rivers and canals. The allozyme variation at nine loci has been studied across a newly built Main-Danube canal which represents an opportunity for mussel mixing. It appears that there is a swamping of the Main populations by the Danube-type larvae, which would be congruent with the waterflow direction. Some inferences about the selective significance of the highly heterozygous allozyme loci in the mussels can be drawn.

Biological invasions, Phylogeny, Heredity, Mussels, Isoenzymes, Zebra mussels, Zebra mussel, Heterosis, Canals

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Genetic population structure of the winter moth (Operophtera brumata L.)(Lepidoptera, Geometridae) in a fragmented landscape

Article Abstract:

The genetic population structure of the winter moth (Operophtera brumata L.)(Lepidoptera, Geometridae) has been studied in a fragmented landscape. Indirect estimates from allozyme polymorphisms have been used to study effects of habitat fragmentation in the moth on a very small geographical scale, and it was shown that with fragmentation genetic differentiation increased, while genetic diversity went down.

Belgium, Biological diversity, Biodiversity, Moths, Habitat partitioning (Biology), Habitat partitioning (Ecology), Forest ecology

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MtDNA variation in Apix cerana populations from the Philippines

Article Abstract:

Mitochondrial DNA (MtDNA) variation has been studied in Apix cerana populations from the Philippines. Four haplotypes were found in populations from four islands. Intraspecific variability is in agreement with the geological history of the islands. It partially agrees with some previous morphological and molecular studies.

Philippines, Mitochondrial DNA, Honeybee, Variation (Biology)

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