Population genetic structure of Australian magpies: evidence for regional differences in juvenile dispersal behaviour

Article Abstract:

Australian magpies have been studied relative to population genetic structure. Large territorial groups may come from retention of juveniles after breeding and if so, local populations of 20 or more likely will have the most genetic structure. Allozyme and mitochondrial DNA data were used to find indirect estimates or regional gene flow. In the region in which groups were largest, populations were most genetically different. Different population genetic structures in one species may come from social system differences.

Behavior, Birds, Biogeochemistry, Magpies

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Concordance between dispersal and mitochondrial gene flow: isolation by distance in a tropical teleost, Lates calcarifer (Australian barramundi)

Article Abstract:

Agreement between dispersal and mitochondrial gene flow are discussed relative to distance isolation in an estuarine tropical teleost, Lates calcarifer (Australian barramundi), a fish. Mitochondrial DNA variation was not generally in agreement with patterns of allozyme variation and population subdivision was found at smaller spatial scales. Population genetic models can find population structure of evolutionary and demographic significance.

Natural history, Fishes, Cladistic analysis, Animal dispersal, Pacific Area, Estuarine ecology, Estuarine ecosystems

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Population genetic structure of the Neotropical termite Nasutitermes nigriceps (Isoptera: Termitidae)

Article Abstract:

Population genetic structure of the termite Nasutitermes nigriceps (Isoptera: Termitidae) of Jamaica is discussed. Little inbreeding was found in the allozyme-analysis study populations, and mating seemed to be random at single sites with the inferred genotypic frequencies of colony progenitors in agreement with Hardy-Weinberg predictions.

Canada, Jamaica, Genetic markers, Termites, Inbreeding

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