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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Age of early hominids

Article Abstract:

The age of fossil hominids at Aramis, Australopithecus ramidus or Ardipithecus ramidus, is disputable because the proposed age of around 4.4 million years does not match volcanic tuff dates in the same area. According to palaeomagnetic samples, the age of A. ramidus should range between 3.89 and 4.39 Myr rather than being 4.4 million years of age which would be in the same age range as the A. afarensis specimens from Belohdelie, Ethiopia, Allia Bay and Tabarin, Kenya. However, the initial age is based on 40Ar/39Ar dating data and suits the palaeomagnetic data based on evidence that the compression of the Cochiti occurred rapidly.

Author: Fleagle, John G., Kappelman, John, WoldeGabriel, G., Renne, P., White, T.D., Suwa, G., de Heinzelin, J., Hart, W.K., Heiken, G.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
Paleomagnetism

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High genomic deleterious mutation rates in hominids

Article Abstract:

The hypothesis that humans may suffer a high genomic deleterious mutation rate has been tested through application of a variant of a molecular approach. It is estimated that around 4.2 amino-acid-altering mutations per diploid per generation have occurred since separation from chimpanzees. About 38% are estimated to have been eliminated by natural selection, suggesting over 1.6 new deleterious mutations, and indicating that the rate specific to protein-coding sequences is nearly to the upper tolerable limit.

Author: Eyre-Walker, Adam, Keightley, Peter D.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
Observations, Genomes, Mutation (Biology), Mutation

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Late Miocene hominids from the Middle Awash, Ethiopia

Article Abstract:

Research describing hominid specimens from the Middle Awash area of Ethiopia is presented. In particular the relationship between fossil hominids and the chimpanzee lineage is investigated.

Author: Haile-Selassie, Yohannes
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
History, Ethiopia, Miocene Epoch, Human evolution, Paleobotany, Ethiopian history

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Subjects list: Research, Prehistoric peoples
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