Notes on the Natural History of Aldabra , Assumption and Glorioso Islands , Indian Ocean
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چکیده
west.t It is entirely of* coral formation, and forms an oval ring of land, broken at several points by channels, and inclosing ;i lagoon. The ring of dry land is widest at the southeast and northwest corners, where it is nearly 3 miles across. The Grande Terre, or main island, forms threefifths of the circumference of the ring. It includes (from midway on the western side of the ring) the whole southern and eastern sides
منابع مشابه
The evolutionary origin of Indian Ocean tortoises (Dipsochelys).
Today, the only surviving wild population of giant tortoises in the Indian Ocean occurs on the island of Aldabra. However, giant tortoises once inhabited islands throughout the western Indian Ocean. Madagascar, Africa, and India have all been suggested as possible sources of colonization for these islands. To address the origin of Indian Ocean tortoises (Dipsochelys, formerly Geochelone gigante...
متن کاملMolecular phylogeography reveals island colonization history and diversification of western Indian Ocean sunbirds (Nectarinia: Nectariniidae).
We constructed a phylogenetic hypothesis for western Indian Ocean sunbirds (Nectarinia) and used this to investigate the geographic pattern of their diversification among the islands of the Indian Ocean. A total of 1309 bp of mitochondrial sequence data was collected from the island sunbird taxa of the western Indian Ocean region, combined with sequence data from a selection of continental (Afr...
متن کاملNative Seychelles tortoises or Aldabran imports? The importance of radiocarbon dating for ancient DNA studies
The living and extinct giant tortoises of the western Indian Ocean islands have been extensively studied in recent times (Bourn et al., 1999; Austin and Arnold, 2001; Palkovacs et al., 2002; Austin et al., 2003; Palkovacs et al., 2003). Currently, indigenous wild populations of Indian Ocean giant tortoises (genus Dipsochelys) occur only on the island of Aldabra, northwest of Madagascar, with mo...
متن کاملBats of the Western Indian Ocean Islands
The natural colonisation of many remote oceanic islands by bats, including those of the western Indian Ocean, has been facilitated by their unique capability among mammals for powered flight. In the western Indian Ocean region, only the Malagasy islands of Madagascar and the Comoros archipelago have been naturally colonised by non-volant mammals. Despite their greater potential for inter-island...
متن کاملWas there a second adaptive radiation of giant tortoises in the Indian Ocean? Using mitochondrial DNA to investigate speciation and biogeography of Aldabrachelys (Reptilia, Testudinidae).
A radiation of five species of giant tortoises (Cylindraspis) existed in the southwest Indian Ocean, on the Mascarene islands, and another (of Aldabrachelys) has been postulated on small islands north of Madagascar, from where at least eight nominal species have been named and up to five have been recently recognized. Of 37 specimens of Madagascan and small-island Aldabrachelys investigated by ...
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تاریخ انتشار 2010