A molecular phylogeny of Amazona: implications for Neotropical parrot biogeography, taxonomy, and conservation.
In situ population structure and ex situ representation of the endangered Amur tiger
- P. Henry, D. Miquelle, T. Sugimoto, D. McCullough, A. Caccone, M. Russello
- Environmental ScienceMolecular Ecology
- 1 August 2009
The results indicate the need to secure ecological connectivity between the two Russian populations to minimize loss of genetic diversity and overall susceptibility to stochastic events, and support a previous study suggesting that the captive population may be a reservoir of gene variants lost in situ.
Ex situ population management in the absence of pedigree information
The discovery of opposing, directional bias exhibited by rxyLR and rxyQG in assigning dyads to a given relationship category suggests that an approach that utilizes a combination of pairwise relatedness estimators may provide the most genetic information for balancing the dual considerations of maximizing gene diversity and minimizing inbreeding in developing breeding recommendations.
Behavioral flexibility and species invasions: the adaptive flexibility hypothesis
The “adaptive flexibility hypothesis” suggests that a more nuanced approach to the study of the behaviors employed by individuals in populations at different invasion stages could generate new insight into the importance of such flexibility during species invasions, and the evolution of behavioral plasticity in general.
Historical DNA analysis reveals living descendants of an extinct species of Galápagos tortoise
- N. Poulakakis, Scott Glaberman, A. Caccone
- BiologyProceedings of the National Academy of Sciences
- 7 October 2008
It is shown that the genetic line of G. elephantopus has not been completely extinguished and still exists in an intermixed population on Isabela, which may help reestablish a species that was thought to have gone extinct more than a century ago and illustrates the power of long-term genetic analysis and the critical role of museum specimens in conservation biology.
From promise to practice: pairing non-invasive sampling with genomics in conservation
The results highlight a range of issues that must be considered when pairing genomic data collection with non-invasive sampling, particularly related to field sampling protocols for minimizing exogenous DNA, data collection strategies and quality control steps for enhancing target organism yield, and analytical approaches for maximizing cost-effectiveness and information content of recovered genomic data.
Unravelling the peculiarities of island life: vicariance, dispersal and the diversification of the extinct and extant giant Galápagos tortoises
- N. Poulakakis, M. Russello, D. Geist, A. Caccone
- Environmental ScienceMolecular Ecology
- 1 January 2012
This work provides an example of how to reconstruct the history of endangered taxa in spite of extinctions and human‐mediated dispersal events and highlights the need to take into account both vicariance and dispersal when dealing with organisms from islands whose associations are not simply explained by a linear emergence model.
Genetic Evidence for Restricted Dispersal along Continuous Altitudinal Gradients in a Climate Change-Sensitive Mammal: The American Pika
Correlative analyses revealed an association between patterns of genetic variation and annual heat-to-moisture ratio, mean annual precipitation, precipitation as snow and mean maximum summer temperature, and changes in climatic regimes forecasted for the region may increase the rate of population extirpation by further reducing dispersal between sites.
An ancient selective sweep linked to reproductive life history evolution in sockeye salmon
Evidence for a selective sweep creating an island of divergence associated with reproductive behavior in sockeye salmon is provided, identifying a series of linked single nucleotide polymorphisms across a ~22,733 basepair region spanning the leucine-rich repeat-containing protein 9 gene exhibiting signatures of divergent selection associated with stream- and shore-spawning in both anadromous and resident forms across their pan-Pacific distribution.
Genomic Changes Associated with Reproductive and Migratory Ecotypes in Sockeye Salmon (Oncorhynchus nerka)
The SNPs and genomic regions identified in this study offer a range of mechanistic hypotheses associated with the genetic basis of O. nerka life history variation and provide novel tools for informing fisheries management.