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| bigeye tuna | |
|---|---|
| Name | Bigeye tuna |
| Genus | Thunnus |
| Species | obesus |
| Authority | (Lowe, 1839) |
bigeye tuna The bigeye tuna is a large pelagic Thunnus species inhabiting tropical and subtropical waters. It is sought by commercial fisheries and sport angling communities and features in international conservation discussions and regional management agreements. The species appears in scientific literature related to oceanography, marine biology, and global trade networks.
The species was described by Richard Thomas Lowe in 1839 and placed in the genus Thunnus. Taxonomic treatments reference comparative work with yellowfin tuna, albacore tuna, and bluefin tuna in monographs published by institutions such as the International Commission for the Conservation of Atlantic Tunas and research groups at the Scripps Institution of Oceanography, the Woods Hole Oceanographic Institution, and the CSIRO. Molecular studies cite DNA sequencing methods developed at laboratories like the Smithsonian Institution and the Natural History Museum, London. Nomenclatural discussions appear in faunal checklists produced by the International Union for Conservation of Nature and regional bodies including the Pacific Islands Forum and the Indian Ocean Tuna Commission.
Adults reach substantial sizes comparable to large pelagic predators discussed by researchers at the Monterey Bay Aquarium Research Institute and in field guides published by the National Oceanic and Atmospheric Administration. Morphological comparisons are routinely made to species described by the FAO and illustrated in guides from the Marine Stewardship Council. Diagnostic characters are evaluated in taxonomic keys used by scientists at the University of Miami Rosenstiel School of Marine and Atmospheric Science and the University of Tokyo. Anatomical and physiological traits are subjects in journals such as publications of the Royal Society and the American Fisheries Society.
The species occurs across oceanic regions studied in expeditions funded by the National Science Foundation and agencies like the Japan Agency for Marine-Earth Science and Technology. Records span the Atlantic Ocean, Pacific Ocean, and Indian Ocean and are included in regional stock assessments coordinated by the Western and Central Pacific Fisheries Commission, the Inter-American Tropical Tuna Commission, and the International Commission for the Conservation of Atlantic Tunas. Habitat use is described in oceanographic surveys by the NOAA Pacific Islands Fisheries Science Center, the Bureau of Fisheries and Aquatic Resources and research published by the University of Hawaii. Diving profiles and thermal ecology are topics in collaborative projects involving the Monterey Bay Aquarium and the National Marine Fisheries Service.
Life-history research references work from institutions such as the Australian Antarctic Division and the European Commission research programs. Studies on diet and trophic interactions cite field campaigns by the Pew Charitable Trusts and academic groups at the University of California, Santa Barbara. Reproductive biology, growth rates, and age determination use methods developed at the International Council for the Exploration of the Sea and laboratories at the Hawaii Institute of Marine Biology. Predator-prey dynamics are considered alongside studies of sharks and dolphins in projects led by the Marine Mammal Commission and the IUCN Shark Specialist Group. Tagging studies linking migrations to oceanic features involve collaborations with the Tag-A-Giant programs and the Global Ocean Observing System.
The species is central to industrial fleets registered in nations such as Spain, Japan, Taiwan, China, Spain, and South Korea and features in trade statistics compiled by the Food and Agriculture Organization of the United Nations. Gear types include longline operations licensed under national authorities like the Ministry of Fisheries and Aquaculture in various states, purse seine vessels operating within waters managed by the Pacific Islands Forum Fisheries Agency, and artisanal fisheries described in regional reports by the World Bank. Product pathways intersect with retail chains and restaurants associated with companies headquartered in cities like Tokyo, Los Angeles, Barcelona, Shanghai, and Bangkok. Certification schemes and ecolabels promoted by the Marine Stewardship Council and corporate sourcing policies of multinational retailers are part of supply-chain discussions.
Assessments appear in listings and assessments by the International Union for Conservation of Nature and stock-status reports prepared for the Western and Central Pacific Fisheries Commission, the Indian Ocean Tuna Commission, and the International Commission for the Conservation of Atlantic Tunas. Management measures include catch limits, seasonal closures, and observer programs coordinated with agencies such as the National Oceanic and Atmospheric Administration, the European Commission, and regional fisheries organizations. Advocacy and policy initiatives involve non-governmental organizations like Greenpeace and the Environmental Defense Fund, while capacity-building and enforcement programs are supported by the United Nations Development Programme and the Food and Agriculture Organization of the United Nations. Conservation actions intersect with international agreements negotiated at forums including the United Nations Conference on Trade and Development and regional fishery management bodies.