Seychelles giant tortoise

Seychelles giant tortoise
Fritz Geller-Grimm · CC BY-SA 3.0 · source
Name	Seychelles giant tortoise

Contents

Seychelles giant tortoise is an informal collective name for the large chelonian fauna historically native to the Seychelles islands, represented by taxa that played prominent roles in 19th-century exploration and colonial natural history. These tortoises were encountered by mariners aboard vessels associated with the British Empire, French Republic, Dutch East India Company, East India Company and later scientists from institutions such as the Royal Society, Smithsonian Institution, Natural History Museum, London, Muséum national d'Histoire naturelle, and the Zoological Society of London. Early records appear in logs of the HMS Beagle, reports by naturalists who corresponded with Charles Darwin, Alfred Russel Wallace, and collectors linked to museums across Europe and North America.

Taxonomy and Nomenclature

Taxonomic assessment invoked authorities including Carl Linnaeus, Georges Cuvier, John Edward Gray, George Robert Waterhouse, Charles Walter De Vis, and later revisions by researchers from University of Cambridge, University of Oxford, University of Oxford Museum of Natural History, Harvard University, Cornell University, Yale University, University of California, Berkeley, and University of Chicago. Early binomials were published in periodicals read by members of the Linnean Society of London and cataloged in collections at the British Museum (Natural History). Subsequent morphological and genetic analyses referenced methods developed at the Smithsonian Institution's National Museum of Natural History, by teams collaborating with University of Zurich, Max Planck Institute for Evolutionary Anthropology, Imperial College London, and the French National Centre for Scientific Research. Nomenclatural debates involved comparisons with taxa described from Aldabra Atoll, Galápagos Islands, Madagascar, and the Comoros, and were discussed at conferences hosted by the International Union for Conservation of Nature and published in journals such as those of the Royal Society of London.

Contemporary descriptions drew on specimen studies curated at the Natural History Museum, London, the Muséum national d'Histoire naturelle, the American Museum of Natural History, and the Royal Ontario Museum, and cited measurements using standards from the International Union of Biological Sciences and laboratories like Sanger Institute for DNA corroboration. Shell morphology was compared with plates and type specimens illustrated by artists employed by the British Admiralty, French Admiralty, and collectors associated with the Hudson's Bay Company and the East India Company. Detailed osteological comparisons invoked techniques from the Smithsonian Institution and the Max Planck Institute, and employed imaging modalities pioneered at the European Molecular Biology Laboratory and the CERN-affiliated facilities for high-resolution scanning. Curatorial records noted carapace dimensions, scute arrangement, and sexual dimorphism, referenced against museum catalogues at the Victoria and Albert Museum and field notes archived by the Royal Geographical Society.

Historical range descriptions were recorded in ship logs of the HMS Bounty, HMS Beagle, HMS Investigator (Australian survey vessel), and charts maintained by the United Kingdom Hydrographic Office, with place names such as Mahé (Seychelles), Praslin (Seychelles), La Digue (Seychelles), and the granitic inner islands. Ecological context was compared to habitats at Aldabra Atoll, Aldabra Group, Suakin Archipelago, and vegetation communities studied by botanists at Kew Gardens, Royal Botanic Gardens, Kew, Missouri Botanical Garden, and the New York Botanical Garden. Historical exploitation linked to provisioning by crews from the British East India Company, French Navy, Portuguese Empire, and whalers from New England, Brittany, and Galicia (Spain) was documented in maritime records preserved by the National Maritime Museum (Greenwich). Island biogeography discussions referenced the Theory of Island Biogeography debates originating from Princeton University and University of Michigan researchers.

Field observations and captive behavioral studies were coordinated through institutions such as the Zoological Society of London, the San Diego Zoo, Taronga Zoo, Bronx Zoo, Singapore Zoo, and university labs at Stanford University, University of Cambridge Department of Zoology, and University of Sydney. Diet and nutrient cycling roles were compared with frugivory studies from the Galápagos National Park, seed dispersal research at Rutgers University, and vegetation surveys published by the International Union for Conservation of Nature and the World Wildlife Fund. Reproductive biology was documented following methodologies from the Society for Conservation Biology and animal husbandry protocols developed at the Smithsonian Conservation Biology Institute and the Durrell Wildlife Conservation Trust. Interactions with invasive species paralleled case studies involving Rattus rattus research by the Royal Society and eradication projects led by organizations including the Island Conservation NGO and the Nature Conservancy.

Conservation status assessments were undertaken by the International Union for Conservation of Nature and informed by field surveys coordinated with agencies such as the Seychelles Islands Foundation, Seychelles National Parks Authority, United Nations Environment Programme, Convention on Biological Diversity, and donor partners like the Global Environment Facility and the European Union. Historic declines were linked to exploitation by sailors from the United States whaling fleet, British Royal Navy, French privateers, and provisioning for ports managed by the East India Company and Hudson's Bay Company. Contemporary threats discussed at symposia hosted by IUCN World Conservation Congress include habitat alteration documented by the World Bank and invasive species reports produced in collaboration with the Food and Agriculture Organization, BirdLife International, and the RSPB (Royal Society for the Protection of Birds).

Reintroduction initiatives referenced programs run by the Seychelles Islands Foundation, the Durrell Wildlife Conservation Trust, Zoological Society of London, IUCN Tortoise and Freshwater Turtle Specialist Group, and government agencies like the Seychelles Department of Environment. Ex situ breeding and genetic studies were published with contributions from the Smithsonian Institution, University of Oxford, University of Cambridge, and captive programs at the San Diego Zoo Global and Columbus Zoo and Aquarium. International funding and collaboration involved the European Union, Global Environment Facility, United Nations Development Programme, and philanthropic partners such as the Arcadia Fund and the Rufford Foundation. Restoration ecology approaches drew on lessons from the Aldabra Atoll recovery program, eradication campaigns led by Island Conservation, and adaptive management frameworks endorsed by the Convention on Biological Diversity and the IUCN.

Category:Fauna of Seychelles Category:Tortoises