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| Portunus | |
|---|---|
| Name | Portunus |
| Regnum | Animalia |
| Phylum | Arthropoda |
| Classis | Malacostraca |
| Ordo | Decapoda |
| Familia | Portunidae |
| Genus | Portunus |
| Authority | Lamarck, 1801 |
Portunus is a genus of swimming crabs in the family Portunidae known for a flattened, paddle-like fifth pereopod adapted for propulsion. Members of the genus appear in coastal ecosystems across the Atlantic, Pacific, and Indian Oceans and are noted in fisheries, ecology, and palaeontology literature. Research on the genus intersects studies by naturalists, institutions, and conservation organizations across Europe, Asia, Africa, and the Americas.
The genus was erected by Jean-Baptiste Lamarck and has been treated by taxonomists at institutions such as the Natural History Museum, the Smithsonian Institution, and the Muséum national d'Histoire naturelle. Revisions have involved systematists associated with the Royal Society, the Zoological Society of London, the American Museum of Natural History, and the Linnean Society. Species concepts have been debated in publications affiliated with the International Commission on Zoological Nomenclature and cited in checklists compiled by the Food and Agriculture Organization, the World Register of Marine Species, and regional museums in Japan, Australia, South Africa, and Brazil. The name derives from classical Latin roots adopted into modern taxonomic practice and has been discussed in works by Georges Cuvier and Carl Linnaeus scholars at universities including Oxford, Cambridge, Harvard, and Sorbonne.
Members display a broadly quadrate carapace with distinct anterolateral teeth and chelae suited for grasping; the morphology has been compared across samples curated by the British Museum, the Royal Ontario Museum, the National Museum of Natural History, and the Australian Museum. Diagnostic characters have been detailed in monographs produced by the International Union for Conservation of Nature, the European Commission marine dossiers, the United Nations Environment Programme, and the National Oceanic and Atmospheric Administration. Comparative anatomical studies reference specimens from institutions such as the California Academy of Sciences, the Museu de Zoologia da Universidade de São Paulo, the Rijksmuseum van Natuurlijke Historie, and the Senckenberg Gesellschaft. Morphometrics often cite analytic frameworks used by researchers at Stanford University, University of Tokyo, Woods Hole Oceanographic Institution, and Scripps Institution of Oceanography.
Species occur in neritic zones from the North Atlantic coasts near the United Kingdom and Norway to tropical shelves off Brazil, Ghana, India, Thailand, and Australia; distributional records appear in atlases produced by the National Geographic Society, the Royal Geographical Society, and the Ocean Biogeographic Information System. Habitats include estuaries monitored by the Environmental Protection Agency, mangrove systems surveyed by the Smithsonian Tropical Research Institute, seagrass beds studied by the International Coral Reef Society, and sandy intertidal flats cataloged by the South African National Biodiversity Institute. Regional checklists from the Japan Fisheries Research and Education Agency, the Bureau of Fisheries and Aquatic Resources, and the Institut Pasteur have documented local occurrences.
Feeding behavior includes scavenging and predation on bivalves and gastropods observed in field studies led by researchers at Duke University, University of California Berkeley, and Rutgers University; trophic interactions have been included in ecosystem models by the European Space Agency and the Intergovernmental Oceanographic Commission. Predator–prey dynamics involve seabirds recorded by the Royal Society for the Protection of Birds, teleost fish cataloged by the American Fisheries Society, and marine mammals studied by the Marine Mammal Commission. Parasite loads and disease associations have been reported in papers from the Centers for Disease Control and Prevention, the Pasteur Institute, and the Wellcome Trust. Behavioral responses to hypoxia and temperature shifts have been investigated by teams at the Max Planck Institute, the Alfred Wegener Institute, and the Helmholtz Centre.
Reproductive strategies involve seasonal spawning noted in fisheries reports from the Food and Agriculture Organization, the Bureau of Fisheries and Aquatic Resources, and state agencies in Louisiana, Kerala, and Queensland. Larval development includes zoeal and megalopal stages described in larval guides published by the Scripps Institution of Oceanography, the Smithsonian Institution, and the Australian Institute of Marine Science. Recruitment patterns and juvenile settlement into seagrass and mangrove nurseries have been studied by researchers at the University of Miami, James Cook University, and the University of Cape Town. Tagging and growth studies appear in journals affiliated with the American Society of Ichthyologists and Herpetologists and the International Council for the Exploration of the Sea.
Recognized species have been catalogued in databases maintained by the World Register of Marine Species, the Catalogue of Life, and national museums including the Natural History Museum, Smithsonian, Australian Museum, and Museu Nacional. Identification keys reference morphological standards used by taxonomists at the Linnean Society, the Royal Society, and the European Molecular Biology Laboratory. Molecular phylogenies involving mitochondrial and nuclear markers have been produced by research groups at the University of Barcelona, the University of São Paulo, Kyoto University, and the University of Auckland. Specimens from fossil beds cited in paleontological collections at the Natural History Museum, the American Museum of Natural History, and the Musée d'Histoire naturelle de Marseille provide context for evolutionary studies.
Several species are targeted by commercial fisheries regulated by the Food and Agriculture Organization, regional fisheries management councils such as the North East Atlantic Fisheries Commission, and national agencies in Japan, India, Brazil, and Australia. Market and aquaculture assessments have been prepared by FAO, the World Bank, and regional development banks, while culinary traditions feature in cookbooks and culinary tourism promoted by VisitBritain, Tourism Australia, and the Japan National Tourism Organization. Conservation assessments have been issued by the IUCN, national parks agencies, and ministries of environment across participating nations. Museums, universities, and outreach programs at institutions such as the Smithsonian, the British Museum, and the California Academy of Sciences incorporate the genus in public education and exhibition.