Implications of hybridization between introduced and resident Orconectes crayfishes

Article Abstract:

The first genetic documentation of hybridization between a resident and invading Orconectes Crayfish is studied using morphological and allozyme comparisons of crayfish from allopatric and sympatric populations. The results show that the genetic mechanisms play a major role in the extirpation of O.propinquus by O.rusticus and are consistent with observations of other researchers suggesting that hybridization with non-native species is common among crayfishes at many locations.

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A molecular genetic assessment of mating-system variation in a naturally bird-pollinated shrub: contributions from birds and introduced honeybees

Article Abstract:

The degree to which birds continue to play a role in determining the mating system of Grevillea macleayana in the disturbed system is compared and their outcrossing rates in open-pollinated inflorescences with inflorescences from which birds are selectively excluded is presented. The results show that there are temporal fluctuations in outcrossing rate and due to this, birds usually have a major effect on the mating system of G. macleayana.

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Limited Utility of mtDNA Markers for Determining Connectivity among Breeding and Overwintering Locations in Three Neotropical Migrant Birds

Article Abstract:

Research shows that mitochondrial DNA is useful for identifying western or eastern breeding lineages in neotropical migrant birds, but is insufficient for assigning individuals to breeding populations at finer scales, and is therefore not useful for studying local demographic trends.

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