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| Arapaima gigas | |
|---|---|
| Name | Arapaima gigas |
| Regnum | Animalia |
| Phylum | Chordata |
| Classis | Actinopterygii |
| Ordo | Osteoglossiformes |
| Familia | Arapaimidae |
| Genus | Arapaima |
| Species | A. gigas |
| Binomial | Arapaima gigas |
| Binomial authority | (Schinz, 1822) |
Arapaima gigas is a large freshwater fish native to South America, notable for its size, air-breathing physiology, and economic importance. It has been the focus of scientific study, artisanal fisheries, aquaculture projects, and conservation policy across multiple countries. The species features prominently in regional culture, museum collections, and international trade discussions.
Arapaima gigas was described by Johann Heinrich Friedrich Link Schinz in 1822 following specimen surveys associated with European naturalists who collaborated with institutions like the British Museum and the Muséum national d'Histoire naturelle. Taxonomic placement within Osteoglossiformes and the family Arapaimidae has been refined through morphological comparisons and molecular analyses by researchers at universities such as University of São Paulo and the Smithsonian Institution. Historical nomenclature includes synonyms introduced in 19th-century catalogues compiled by curators at the Linnaean Society and collectors linked to expeditions funded by the Royal Society. Modern revisions reference phylogenetic work published by collaborations involving the American Museum of Natural History and the Natural History Museum, London.
Arapaima gigas reaches exceptional length and mass, rivaled in freshwater fauna records curated by institutions like the Field Museum and the National Museum of Brazil. Anatomical descriptions used in monographs from the California Academy of Sciences and the Royal Ontario Museum highlight elongated body form, cycloid scales, and a distinctive red-tinged caudal region noted in plates held by the Biodiversity Heritage Library. Morphometric datasets produced by researchers affiliated with the International Union for Conservation of Nature and the Food and Agriculture Organization document meristic counts and gill adaptations that support facultative air-breathing observed in comparative physiology studies at the Max Planck Institute and the University of Cambridge.
Native distribution spans river basins such as the Amazon River, Rio Negro (Amazon), Madeira River, and Tocantins River, with records in national jurisdictions including Brazil, Peru, Colombia, and Suriname. Historical range maps held by the World Wildlife Fund and the Pan American Health Organization illustrate occurrences in várzea floodplains, oxbow lakes, and inundated forests monitored by teams from the Amazon Cooperation Treaty Organization and the Carnegie Institution. Introductions and translocations documented in environmental assessments by the International Union for Conservation of Nature and regional ministries reflect sightings in reservoirs and aquaculture ponds managed by agencies like Brazil's IBAMA and Peru's SERFOR.
Arapaima gigas is an apex freshwater predator whose diet studies by researchers at the University of Stirling and the Smithsonian Tropical Research Institute show piscivory on species catalogued in ichthyological surveys from the Instituto Nacional de Pesquisas da Amazônia and stomach-content analyses published in journals associated with the Royal Society. Respiratory physiology research conducted at the University of São Paulo and the University of Oxford documents air-breathing via a vascularized swim bladder, an adaptation also discussed in comparative works by the American Physiological Society and the European Society for Comparative Physiology. Seasonal movement and habitat use tied to flood pulse dynamics have been described in collaboration with hydrologists from the National Oceanic and Atmospheric Administration, the Pan American Development Foundation, and researchers contributing to programs at the Smithsonian Institution.
Reproductive behavior has been characterized by field studies conducted by biologists affiliated with the National Institute of Amazonian Research and the University of Florida, documenting nest building in shallow inundated vegetation during low-water seasons coordinated with hydrological cycles described in reports from the Inter-American Development Bank. Parental care, including mouthbrooding-like behaviors and nest guarding, appears in ethological descriptions from the Max Planck Institute for Animal Behavior and field notes archived at the British Library. Age and growth studies using otolith and scale readings were undertaken by laboratories at the Woods Hole Oceanographic Institution and the University of British Columbia, informing stock-assessment models used by regional fisheries agencies such as SERNAPESCA and ICMBio.
Arapaima gigas is central to artisanal and commercial fisheries monitored by the Food and Agriculture Organization and national bodies like IBAMA and SERFOR. Local communities profiled in ethnographic work from the National Museum of the Federal University of Rio de Janeiro utilize traditional management systems documented alongside projects by the World Wildlife Fund and the Wildlife Conservation Society. Aquaculture initiatives developed with universities including the University of Stirling and enterprises supported by the Inter-American Development Bank explore production techniques, processing methods, and market chains linked to retailers in cities documented by the Brazilian Institute of Geography and Statistics and trade analyses by the World Trade Organization.
Conservation assessments coordinated by the IUCN Red List and regional assessments from the Convention on International Trade in Endangered Species of Wild Fauna and Flora highlight pressures from overfishing, habitat modification by infrastructure projects such as dams catalogued by the World Bank and the Brazilian Development Bank, and environmental change documented by the Intergovernmental Panel on Climate Change. Protection measures include community-based quotas, protected area designations managed with the United Nations Environment Programme, and captive-breeding programs run by institutions like the Smithsonian Conservation Biology Institute and the Zoological Society of London. Ongoing research collaborations among the University of São Paulo, the Smithsonian Institution, and international NGOs aim to reconcile sustainable use with biodiversity commitments under frameworks such as the Convention on Biological Diversity.
Category:Osteoglossiformes Category:Freshwater fish of South America