|
Post by surroundx on Nov 5, 2017 8:42:04 GMT
|
|
|
Post by surroundx on Jul 6, 2019 4:06:42 GMT
|
|
|
Post by surroundx on Jul 6, 2019 4:22:09 GMT
|
|
|
Post by surroundx on Jul 6, 2019 5:33:01 GMT
|
|
|
Post by surroundx on Jul 6, 2019 5:38:25 GMT
|
|
|
Post by surroundx on Jan 25, 2021 4:50:04 GMT
|
|
|
Post by surroundx on Aug 3, 2021 1:53:33 GMT
"South Africa suffers a second loss of the blue antelope ( Hippotragus leucophaeus) as DNA analysis confirms that the sole specimen held in South African collections is sable ( H. niger) material" sajs.co.za/article/view/9489/16949
|
|
|
Post by Melanie on Nov 14, 2022 12:03:15 GMT
Oldest palaeogenome from the African continent tells of the extinction of the blue antelope Dr. Gesine Steiner Pressestelle Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung An international team of scientists led by the Museum für Naturkunde Berlin and the University of Potsdam generated the first two nuclear genomes of the extinct blue antelope. At 9,950 years, one of the genomes is the oldest sequenced from the African continent to date. The genomic data provide insight into a species' extinction. The blue antelope is the only large African mammal species to have become extinct in historical times. The results of this study published in Molecular Biology and Evolution, show that, despite low population sizes, the blue antelope survived the climatic upheavals of the last 10,000 and more years, until the arrival of European settlers put an end to the species. The blue antelope (Hippotragus leucophaeus) was an African antelope with a bluish-grey pelt related to the living sable and roan antelopes. The last blue antelope was shot around 1800, only 34 years after it was first described scientifically, making it the only large African mammal species to have become extinct in historical times. A previous study by the same team showed that the blue antelope is one of the scarcest mammal species in historical museum collections globally, and studies to date have only succeeded in recovering relatively small portions of DNA (the mitochondrial genome). Now, a team of scientists led by the Museum für Naturkunde Berlin and the University of Potsdam succeeded in extracting the first nuclear genomes for this species from one of the rare historical specimens from the Swedish Natural History Museum and a 9,800- to 9,300-year-old fossil tooth from Iziko Museums of South Africa. The fossil genome is now the oldest palaeogenome retrieved from Africa. Prevailing environmental conditions in Africa, namely high temperatures, are detrimental to biomolecule preservation, making the retrieval of ancient DNA exceedingly challenging. “The genomes show that population sizes of the blue antelope were low since the end of the last ice age around 10,000 years ago and thereby also at the time when European colonists arrived in southern Africa during the 17th century,” explains Elisabeth Hempel, palaeogeneticist at the Museum für Naturkunde Berlin and the University of Potsdam. The fossil record confirms a major decrease in the relative abundance of blue antelope specimens towards the end of the last ice age. “Despite their small range and low population size, blue antelopes survived through the last 10,000 years alongside a long human presence in the region. That is, until the arrival of European colonists and firearms, leading to the end of a species that may have already been struggling due to millenia of habitat loss and range fragmentation”, says Elisabeth Hempel. The genomic data is freely available. academic.oup.com/mbe/advance-article/doi/10.1093/molbev/msac241/6794086Publication: Elisabeth Hempel, Faysal Bibi et al., 2022. Blue turns to grey -–Palaeogenomic insights into the evolutionary history and extinction of the blue antelope (Hippotragus leucophaeus). doi.org/10.1093/molbev/msac241
|
|
|
Post by koeiyabe on Aug 6, 2023 3:37:48 GMT
"Atlas of Extinct Animals (in Japanese)" by Radek Maly (2022)
|
|
|
Post by surroundx on Aug 31, 2023 12:23:10 GMT
Assessing the identity of rare historical museum specimens of the extinct blue antelope (Hippotragus leucophaeus) using an ancient DNA approachdoi.org/10.1007/s42991-023-00373-4
|
|
|
Post by Melanie on Sept 5, 2023 22:42:05 GMT
Horns in the Natural History Museum's collection confirmed to be from extinct bluebuck antelope Once found roaming the very southern edge of the African continent, the bluebuck antelope was hunted to extinction just 34 years after it was first scientifically described. Within that tiny window of time, only four confirmed historical specimens were known to have made it into museums around the world. Now researchers have validated another, a pair of horns in the Natural History Museum’s collections. The bluebuck or blue antelope was the first large African mammal to go extinct in recent times. Once found living in the grasslands along the southern coast of South Africa, it was driven to extinction by humans in around 1800. While closely related to two surviving antelopes, the sable and roan, the bluebuck was distinct having split from a last common ancestor some 1.5 million years ago. As the name suggests, the bluebuck had a predominantly blue-grey coat that faded to a whitish colour on its belly. On its head it had white patches in front of its eyes, and a pair of large, ridged horns that swept back in an elegant curve. While these horns were typically smaller than those found on its relatives, they still reached a respectable length of about 50 centimetres. But the likely scarcity of the bluebuck by the time Europeans first encountered it, and the speed at which it was made extinct, means that there are astonishingly few specimens of this antelope in museums around the world. Now a new study has used genetics to confirm that a pair of horns in the Natural History Museum’s collection is from the unfortunate species, bringing the total number of confirmed bluebuck specimens globally to five. www.nhm.ac.uk/discover/news/2023/september/horns-in-museum-collection-from-extinct-bluebuck-antelope.html
|
|
|
Post by surroundx on Apr 26, 2024 11:41:24 GMT
Hempel, Elisabeth, Faith, J. Tyler, Preick, Michaela et al. (2024). Colonial-driven extinction of the blue antelope despite genomic adaptation to low population size. Current Biology. doi.org/10.1016/j.cub.2024.03.051
|
|
|
Post by Sebbe on Oct 31, 2024 16:59:42 GMT
Mammals collected and illustrated by the Baudin Expedition to Australia and Timor (1800-1804): A review of the current taxonomy of specimens in the Muséum national d’Histoire naturelle and the illustrations in the Muséum d’Histoire naturelle du Havre.sciencepress.mnhn.fr/en/periodiques/zoosystema/43/21
|
|