Carcharhinus longimanus

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Carcharhinus longimanus

The oceanic whitetip shark is a pelagic species of requiem shark known for its rounded fins with white tips; it is a widely recognized predator in open oceans and has been the subject of fisheries, conservation, and maritime safety discussions. Historically important to explorers, naturalists, and marine institutions, the species appears in accounts linked to voyages by Charles Darwin, operations of the United States Navy, and records curated by museums such as the Smithsonian Institution. Its striking appearance and interactions with humans have connected it to topics involving the International Union for Conservation of Nature, the Convention on International Trade in Endangered Species of Wild Fauna and Flora, and regional management by organizations like the Pacific Islands Forum.

Taxonomy and nomenclature

Described in 1861 by Felipe Poey, the species is placed in the genus Carcharhinus within the family Carcharhinidae, a group dissected in taxonomic revisions by researchers at institutions such as the Natural History Museum, London, the American Museum of Natural History, and the Muséum national d'Histoire naturelle. Its formal naming intersects with historical catalogs from the British Museum and specimen exchanges involving collectors linked to the Royal Society and the Academia de Ciencias de Cuba. Molecular phylogenetics using methods developed at universities like Harvard University, University of Oxford, and Scripps Institution of Oceanography have informed its relationships with other Carcharhinus members, and comparative studies reference type material housed at the Museo Nacional de Historia Natural (Cuba).

Adults typically reach lengths reported in fisheries reports and field guides produced by the Food and Agriculture Organization and NGOs such as the Wildlife Conservation Society. Morphological descriptions in monographs from the Zoological Society of London note the broad, rounded pectoral fins and dorsal fin with distinctive white tips; such features are illustrated in plates published by the Linnean Society of London and depicted in field guides from the Australian Museum and the New Zealand Department of Conservation. Coloration and dentition comparisons appear in studies from the University of Miami and the Woods Hole Oceanographic Institution, while size and weight data are cited in reports by the National Oceanic and Atmospheric Administration and the Food and Agriculture Organization. Morphometric analyses have been published in journals affiliated with the Royal Society and academic presses at Cambridge University Press.

The species is circumglobal in tropical and subtropical waters, recorded by regional fisheries and research programs including the International Commission for the Conservation of Atlantic Tunas, the Pacific Community, and the Indian Ocean Tuna Commission. Range maps in compilations by the IUCN and monitoring projects run by the Australian Fisheries Management Authority and the Mauritius Oceanography Institute show presence in areas patrolled historically by navies such as the Royal Australian Navy and the French Navy (Marine nationale). Encounters documented on voyages like those of the HMS Challenger and observations from platforms of opportunity reported to agencies such as the National Marine Fisheries Service support its pelagic distribution beyond continental shelves, often associated with floating objects noted by programs at the University of California, Santa Barbara.

Ecological roles have been described in ecosystem assessments by the International Maritime Organization, the United Nations Environment Programme, and research groups at institutions such as the Scripps Institution of Oceanography and the Woods Hole Oceanographic Institution. It is an opportunistic predator with records of foraging behavior reported by expeditions supported by the Monterey Bay Aquarium Research Institute and stomach content studies published with contributions from the Smithsonian Tropical Research Institute. Interactions with large pelagics cited in marine faunal surveys by the Royal Society for the Protection of Birds and tagging studies conducted with equipment from Argos (satellite system) and analytics at the National Oceanic and Atmospheric Administration reveal long-distance movements similar to patterns documented for species studied by the Pew Charitable Trusts and tagged during cruises partnering with the University of Miami.

Life history parameters have been estimated in demographic studies by the IUCN Shark Specialist Group and academic teams at the University of British Columbia and the University of Cape Town. The species is viviparous with placental connections, a reproductive mode also detailed in comparative texts from the Zoological Society of London and course materials at the Scripps Institution of Oceanography. Maturation ages, litter sizes, and growth rates are reported in fisheries assessments by the Food and Agriculture Organization and regional programs like the Western and Central Pacific Fisheries Commission, with population modeling approaches borrowed from research at the University of Washington and statistical frameworks developed at the National Research Council (US).

Listed as Vulnerable by the International Union for Conservation of Nature, the species faces threats documented by conservation NGOs including the World Wildlife Fund, Conservation International, and the Wildlife Conservation Society. Major pressures derive from industrial fisheries monitored by bodies such as the International Commission for the Conservation of Atlantic Tunas, the Indian Ocean Tuna Commission, and national agencies like the National Oceanic and Atmospheric Administration; bycatch and targeted retention for fins have been focal subjects in campaigns led by organizations like the Shark Trust and legislative efforts in parliaments such as the European Parliament and the United States Congress. International trade controls have been discussed under frameworks of the Convention on International Trade in Endangered Species of Wild Fauna and Flora and regional agreements brokered through the Convention for the Conservation of Migratory Species of Wild Animals. Conservation actions promoted by the IUCN Shark Specialist Group, marine protected areas advocated by the United Nations Environment Programme, and fisheries reforms supported by the Food and Agriculture Organization aim to reduce mortality and improve monitoring, with implementation involving partners like the Pacific Islands Forum and national fisheries departments such as the Fisheries and Oceans Canada.

Category:Sharks