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Trachurus trachurus, commonly known as the European horse mackerel or simply horse mackerel, is a pelagic schooling fish belonging to the family Carangidae. It is characterized by its elongated, somewhat compressed body and distinctive lateral line armed with prominent scutes. This species is a significant component of marine ecosystems, serving as both a predator and prey, and holds considerable commercial importance across its range.
Fizinės ypatybės
- Kūno forma
- elongated
- Spalva
- Dorsal side typically bluish-green to grey, fading to silvery-white on the flanks and belly. A distinct black spot is usually present on the upper margin of the operculum (gill cover).
- Žvynų tipas
- cycloid
- Burnos padėtis
- terminal
- Skiriamieji požymiai
- Prominent, keeled scutes along the entire lateral line, particularly noticeable posteriorly., Two dorsal fins, the first spiny and the second soft-rayed., A small, detached finlet often present behind the second dorsal and anal fins (though less pronounced than in true mackerels)., Large eyes relative to head size.
- Nugaros pelekas
- Two dorsal fins: the first with 8-9 spines, the second with 1 spine and 28-33 soft rays. The first dorsal fin is noticeably higher than the second.
- Uodegos pelekas
- Deeply forked caudal fin.
- Krūtinės pelekas
- Long and falcate (sickle-shaped), extending beyond the origin of the second dorsal fin.
- Skiriamieji pelekai
- Anal fin similar in shape to the second dorsal fin, with 3 spines (the first two often detached) and 24-29 soft rays. Pelvic fins are small and located thoracically.
Atpažinimo patarimai
Lateral Line Scutes
The most definitive feature is the complete lateral line armed with a series of large, bony scutes (modified scales). These are particularly prominent and keeled towards the caudal peduncle. This distinguishes it from true mackerels (Scomber spp.) which lack these scutes.
Opercular Spot
Look for a distinct black spot on the upper part of the operculum (gill cover).
Dorsal Fins
Two distinct dorsal fins, with the first spiny dorsal fin being taller than the second soft-rayed dorsal fin.
Body Shape
Elongated and fusiform (spindle-shaped) body, but slightly compressed laterally, giving it a more 'horse-like' appearance compared to the more rounded true mackerels.
Buveinė
- Vandens tipas
- saltwater
- Gylis
- Typically found from the surface down to 200-300 meters, occasionally deeper (up to 1000 meters). Juveniles are often found in shallower coastal waters.
- Aplinka
- Pelagic-neritic, inhabiting open waters over continental shelves and slopes. Forms large, dense schools, especially during feeding and spawning. Often associated with sandy or muddy bottoms when resting, but primarily an open-water species.
- Geografinis paplitimas
- Eastern Atlantic Ocean, from Norway and Iceland south to South Africa, including the Mediterranean Sea and the Black Sea. Also found off the coast of West Africa.
Informacija akvariumui
- Priežiūros sudėtingumas: expert
- Temperamentas: semi-aggressive
- Mityba: carnivore
- Minimalus akvariumo dydis: 2000 gallons (for a small school)
- Temperatūra: 10-20°C (50-68°F)
- pH lygis: 8.0-8.4
- Kietumas: 8-12 dKH
- Suderinamumas: Not suitable for typical home aquaria due to size, schooling behavior, and specific environmental needs. Best kept in large public aquariums with other large, fast-swimming pelagic species.
- Specialūs reikalavimai: Requires immense tank volume, strong water flow, excellent filtration, and a constant supply of live or fresh frozen prey. Highly susceptible to stress in confined environments. Schooling species, so multiple individuals are necessary.
Informacija apie laukinę populiaciją
- Apsaugos statusas: least concern
- Sezoniškumas: Available year-round in many parts of its range, with peak catches often occurring during warmer months when schools are more accessible near coastal areas.
- Rinkos kaina: Varies significantly by region and season, generally a moderately priced food fish.
- Komercinė reikšmė: high
- Skonis: Mild, slightly oily, distinct fish flavor.
- Tekstūra: Firm, flaky flesh.
- Gaminimo būdai: Grilled, Fried, Baked, Smoked, Marinated
- Maistinė vertė: Good source of protein, Omega-3 fatty acids, and various vitamins and minerals (e.g., B12, selenium).
Pagrindiniai faktai
Schooling Behaviorbehavior
Trachurus trachurus forms large, dense schools, sometimes comprising millions of individuals, which is a key survival strategy against predators and aids in efficient foraging.
Scutes for Defenseinteresting
The prominent, keeled scutes along its lateral line are not just for identification; they are believed to offer a degree of protection against predators, making the fish harder to swallow.
Dietary Shiftbehavior
Juvenile horse mackerel primarily feed on zooplankton, while adults shift to a diet dominated by small crustaceans (like copepods and euphausiids), cephalopods, and other small fish.
Migratory Patternsbehavior
This species undertakes significant seasonal migrations, often moving to deeper, warmer waters in winter and shallower, cooler waters in summer for feeding and spawning.
Ecological Importanceinteresting
As a mid-trophic level predator and prey, the European horse mackerel plays a crucial role in marine food webs, linking zooplankton and smaller fish to larger predators like tuna, sharks, and marine mammals.
Saugos informacija
Elkitės atsargiai- Saugumo lygis: caution
- Nuodinga: Ne
- Tinkamumas maistui: edible
- Elgesio su žuvimi pastabos: While not venomous, the spines of the first dorsal fin and the two detached spines anterior to the anal fin can inflict painful punctures. The prominent scutes along the lateral line are also sharp and can cause cuts. Handle with care, preferably using gloves or a fish gripper, especially when removing from hooks.
Panašūs rūšys
Mediterranean Horse Mackerel
Trachurus mediterraneus
The lateral line scutes are less developed anteriorly and do not extend the entire length of the lateral line as prominently as in T. trachurus. The black opercular spot is often less distinct or absent.
Blue Jack Mackerel
Trachurus picturatus
Generally has a more slender body and a more pronounced blue coloration dorsally. The scutes on the lateral line are typically smaller and less keeled than in T. trachurus.
Chub Mackerel
Scomber japonicus
Lacks the prominent scutes on the lateral line. Has a series of small finlets behind the dorsal and anal fins (more numerous and distinct than in Trachurus). Body is more rounded and typically has wavy dark lines or spots on the back.
Mokslinė klasifikacija
- Karalystė
- Animalia
- Tipas
- Chordata
- Klasė
- Actinopterygii
- Būrys
- Carangiformes
- Šeima
- Carangidae
- Gentis
- Trachurus
- Rūšis
- Trachurus trachurus
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