Trachurus trachurus

Trachurus trachurus
Name	Horse mackerel
Status	DD
Status system	IUCN3.1
Taxon	Trachurus trachurus
Authority	(Linnaeus, 1758)

Trachurus trachurus is a species of jack mackerel commonly known as the Atlantic horse mackerel or scad. It is a pelagic schooling fish important to fisheries and food cultures around the eastern North Atlantic and Mediterranean Sea. The species has been the subject of taxonomic, ecological, and fisheries management studies involving numerous institutions and international bodies.

Taxonomy and nomenclature

Described by Carl Linnaeus in 1758, the species was placed within the genus Trachurus in the family Carangidae, a group studied by authorities like the British Museum (Natural History), Muséum national d'Histoire naturelle, and researchers affiliated with University of Oxford, University of Cambridge, University of Lisbon, and University of Bergen. Subsequent systematic work by taxonomists from Natural History Museum, London, Smithsonian Institution, Zoological Society of London, and the Royal Society has examined morphological characters and compared type specimens with material held at institutions such as the National Museum of Natural History (France), Museo Nacional de Ciencias Naturales, and the Senckenberg Museum. Nomenclatural issues have been discussed in monographs and by ichthyologists publishing in journals linked to Royal Society Publishing, Elsevier, Springer Nature, and the Journal of Fish Biology.

Description and identification

Adults are characterized by an elongated, compressed body, a single dorsal fin preceded by scutes and a lateral line with an arcuate anterior section; diagnostic morphology has been documented in field guides produced by the International Council for the Exploration of the Sea, Food and Agriculture Organization, ICES, and national agencies like Marine Scotland, Institut français de recherche pour l'exploitation de la mer, and Instituto Português do Mar e da Atmosfera. Identification keys used by researchers from University of Southampton, University of Vigo, Helgoland Museum, and Irish Marine Institute contrast Trachurus trachurus with congeners studied at University of Barcelona and University of Murcia. Morphometric and meristic data cited in works published by Cambridge University Press, Wiley-Blackwell, and authors affiliated with Plymouth Marine Laboratory help distinguish it from species assessed by the European Commission's scientific panels and cataloged in the databases maintained by WorldFish and GBIF.

Distribution and habitat

The species ranges across the eastern North Atlantic, including waters surveyed by the Marine Institute (Ireland), Institute of Marine Research (Norway), Instituto Español de Oceanografía, and the Faroes research programs; it is also present in the Mediterranean Sea and Black Sea, areas monitored by the General Fisheries Commission for the Mediterranean, Black Sea Commission, and regional agencies such as Directorate-General for Maritime Affairs and Fisheries and CEFAS. Presence records are incorporated in datasets from Ocean Biogeographic Information System, EMODnet, European Environment Agency, and projects involving researchers at University of Lisbon, University of Copenhagen, Aarhus University, and University of Bergen. Habitat use and migrations have been examined in collaborations with institutions like ICES, Plymouth Marine Laboratory, University of Southampton, Danish Technical University, and initiatives funded by the European Union and Horizon 2020.

Biology and ecology

Life history traits—spawning, growth, age structure, and trophic interactions—have been investigated by scientists affiliated with University of Liverpool, University of Aberdeen, Galway-Mayo Institute of Technology, and University of Cádiz; studies have appeared in periodicals such as ICES Journal of Marine Science and Marine Biology. Diets and predator-prey relationships link this species to food webs studied by researchers at Woods Hole Oceanographic Institution, Scripps Institution of Oceanography, National Oceanic and Atmospheric Administration, and the Mediterranean Science Commission. Parasite loads and disease studies involve collaborations with European Centre for Disease Prevention and Control-connected laboratories, veterinary departments at Royal Veterinary College, and parasitologists publishing in Parasitology. Population genetics and stock structure are topics of work by teams at University College London, University of Southampton, University of Barcelona, Universidad de León, and sequencing efforts archived through GenBank and analyzed using tools from European Molecular Biology Laboratory and Wellcome Sanger Institute.

Fisheries and commercial importance

The species supports commercial fisheries prosecuted by fleets from United Kingdom, Portugal, Spain, France, Ireland, Norway, Morocco, and Iceland; management and catch statistics are reported to bodies including Food and Agriculture Organization, ICES, European Commission, and General Fisheries Commission for the Mediterranean. Processing and markets engage companies and organizations in Brittany, Galicia, Algarve, and the North Sea ports, with product chains involving exporters registered with International Chamber of Commerce-linked trade networks. Economic analyses conducted by research centers at University of Portsmouth, Queen's University Belfast, Trinity College Dublin, and Cork Institute of Technology have considered its role in regional fisheries, artisanal sectors, and canning industries historically documented in archives of the British Library and Archivo General de Indias.

Conservation status and management

Assessments by the International Union for Conservation of Nature and stock advice from ICES inform measures taken by the European Commission and national authorities including Marine Scotland Science, Instituto Português do Mar e da Atmosfera, and Instituto Español de Oceanografía. Management tools applied include quotas, technical measures, and monitoring programs coordinated by FAO and regional fisheries management organizations such as NEAFC and GFCM. Research on bycatch, ecosystem impacts, and climate-driven distribution shifts is ongoing in projects funded by Horizon Europe and undertaken by institutions like Plymouth Marine Laboratory, IMAR, Marine Institute (Ireland), and the Scottish Government's marine directorates.

Category:Carangidae Category:Marine fish of Europe