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We studied the population genetics of Podocnemis unifilis turtles within and among basins in the Orinoco and Amazon drainages using microsatellites. We detected high levels of genetic diversity in all sampled localities. However, ‘M-ratio’ tests revealed a substantial recent population decline in ten localities, in accord with current widespread exploitation. Our results reveal a consistent pattern...
Recipients of Darwin Medals from the International Society of Reef Studies are requested to write an overview of the work that led to their award. This account is a personal perspective of thirty-five years work on corals. The fields of taxonomy, biogeography, palaeontology, molecular biology, and evolution are presented in an historical context. Emphasis is given to the changing relevance of these...
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