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| Chilean jack mackerel | |
|---|---|
| Name | Chilean jack mackerel |
| Taxon | Trachurus murphyi |
| Authority | Nichols, 1920 |
Chilean jack mackerel is a pelagic schooling fish of the family Carangidae widely known for forming vast shoals across the southeastern Pacific Ocean and being a cornerstone species for industrial fisheries. It has been the focus of multinational management efforts and scientific research involving organizations, governments, and regional fisheries bodies.
The species Trachurus murphyi was described by John Treadwell Nichols in 1920 and is placed within the family Carangidae, order Carangiformes, class Actinopterygii, phylum Chordata, and kingdom Animalia. Diagnostic characters used by taxonomists include meristic counts and morphometrics referenced in works from institutions such as the Smithsonian Institution and the Natural History Museum, London. Identification guides produced by the Food and Agriculture Organization (FAO) and regional museums contrast Trachurus murphyi with congeners like Trachurus trachurus and Trachurus symmetricus, using features catalogued in publications by the International Council for the Exploration of the Sea (ICES) and the National Oceanic and Atmospheric Administration (NOAA). Specimen records are archived in collections at the Museo Nacional de Historia Natural (Chile), the Australian Museum, and the California Academy of Sciences.
Trachurus murphyi occurs primarily in the southeastern Pacific, with core distributional records documented off the coasts of Chile, Peru, Ecuador, and the Falkland Islands. Oceanographic surveys by the Scripps Institution of Oceanography, the Plymouth Marine Laboratory, and the Institute of Marine Research (Norway) have described its range extending along the Humboldt Current upwelling system and into subtropical waters influenced by the South Pacific Gyre. Acoustic and trawl studies conducted by research vessels from the National Fisheries Research and Development Institute (South Korea), the Institute of Marine Research (Chile), and the Instituto del Mar del Perú show aggregation over continental shelves, seamounts such as the Nazca Ridge, and offshore banks. Habitat associations documented in papers from the University of California, Santa Cruz, the University of Auckland, and the University of Concepción emphasize dynamic thermal fronts, oxygen minimum zones studied by the Monterey Bay Aquarium Research Institute (MBARI), and areas influenced by events like El Niño–Southern Oscillation (ENSO).
Life-history studies from the University of Washington, the Pontifical Catholic University of Chile, and the University of Santiago de Compostela report growth, age, and reproduction parameters including rapid early growth, schooling behavior, and spawning aggregations. Reproductive seasonality has been linked to oceanographic conditions monitored by the National Aeronautics and Space Administration (NASA), the European Space Agency (ESA), and the Japan Agency for Marine-Earth Science and Technology (JAMSTEC). Diet analyses published by researchers at the Max Planck Institute for Marine Microbiology, the Woods Hole Oceanographic Institution (WHOI), and the University of Lisbon indicate a trophic role consuming zooplankton and small pelagic fishes, connecting to predators such as Humboldt penguin, South American sea lion, dolphins, and commercially important sharks documented by the International Union for Conservation of Nature (IUCN). Tagging programs led by the International Pacific Research Center and the Fisheries and Oceans Canada have informed migration and connectivity between nursery areas and adult feeding grounds.
The species became a flagship resource for high-seas industrial fleets from nations including Japan, Spain, South Korea, China, Taiwan, and Peru, with landing statistics recorded by the Food and Agriculture Organization and national agencies such as the Servicio Nacional de Pesca y Acuicultura (SERNAPESCA). Large-scale purse seine and midwater trawl fisheries developed involving companies registered in Panama, Venezuela, and Japan and supplying canneries in Portugal, Spain, and Italy. Economic analyses by the World Bank, the Inter-American Development Bank, and the Organisation for Economic Co-operation and Development (OECD) explore employment, export earnings, and fleet dynamics, while trade flows are traced through ports like Valparaíso, Callao, Paita, and Montevideo. Market products include frozen fillets and meal for aquafeed used by industries represented by the AquaChile sector and multinational processors audited under standards from organizations like the Marine Stewardship Council (MSC).
Concerns over stock declines prompted regional governance responses including the formation of the South Pacific Regional Fisheries Management Organisation (SPRFMO) and negotiations among coastal states and distant-water fleets under auspices such as the United Nations Convention on the Law of the Sea (UNCLOS) and the Convention on Biological Diversity (CBD). Scientific assessments by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), the Inter-American Tropical Tuna Commission (IATTC), and the International Scientific Committee for Tuna and Tuna-like Species in the North Pacific Ocean (ISC) informed quota proposals and monitoring frameworks. Conservation measures have included catch limits, spatial closures, observer programs administered with assistance from the Food and Agriculture Organization, and satellite vessel monitoring systems coordinated with the International Maritime Organization (IMO). Research collaborations among Pew Charitable Trusts, WWF, Greenpeace, and academic partners have advocated for ecosystem-based management and precautionary approaches.
Culinary traditions in Chile and Peru incorporate jack mackerel into canned products, empanadas, and local dishes sold in markets such as Mercado Central (Santiago), while gastronomy publications from chefs associated with restaurants in Lima, Santiago, and Valparaíso explore smoked and grilled preparations. The species features in cultural narratives studied by scholars at the Pontifical Catholic University of Peru and the University of Chile and appears in fisheries folklore and regional festivals in coastal communities of Iquique, Antofagasta, and Pisco. Internationally, processed products enter supply chains linked to retailers headquartered in Walmart, Tesco, Carrefour, and Aldi.
Category:Trachurus Category:Fish of South America