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Apri l'appDescrizione
Osmerus eperlanus, commonly known as the European Smelt or Sperlano, is a small, slender anadromous or landlocked fish belonging to the family Osmeridae. It is characterized by its silvery appearance, elongated body, and a distinctive cucumber-like odor when freshly caught. This species plays a significant ecological role as a forage fish and has historical importance in fisheries.
Caratteristiche fisiche
- Forma del corpo
- elongated
- Colorazione
- Dorsal side is typically olive-green to brownish, fading to silvery flanks and a white belly. Fins are generally translucent or slightly dusky. A distinct silvery lateral band is often present.
- Tipo di squame
- cycloid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Slender, elongated body, Large mouth extending to below the eye, Prominent canine-like teeth on the tongue and jaws, Adipose fin present (small, fleshy fin between dorsal and caudal fins), Distinctive cucumber-like smell when fresh, Large, easily shed scales
- Pinna dorsale
- Single dorsal fin, relatively short, located mid-body.
- Pinna caudale
- Deeply forked caudal fin.
- Pinna pettorale
- Pectoral fins are relatively long and pointed.
- Pinne distintive
- Presence of a small, fleshy adipose fin, characteristic of salmoniform fishes.
Consigli per l'identificazione
Size
Adults typically range from 15-20 cm (6-8 inches) in length, though some individuals can reach up to 30 cm (12 inches).
Coloration and Body Shape
Look for the slender, silvery body with a darker back and a distinct silvery lateral line. The body is more elongated than many other small fish.
Adipose Fin
The presence of a small, fleshy adipose fin between the dorsal and caudal fins is a key characteristic of smelts and related species.
Mouth and Teeth
Observe the relatively large mouth with prominent teeth on the tongue and jaws, which helps distinguish it from some other small forage fish.
Smell
The fresh 'cucumber' smell is a very reliable and unique identifier for Osmerus eperlanus.
Habitat
- Tipo di acqua
- brackish
- Profondità
- Typically found in shallow coastal waters, estuaries, and lower reaches of rivers, but also in deeper parts of freshwater lakes. During spawning, they move into very shallow, flowing water.
- Ambiente
- Anadromous populations inhabit coastal marine waters and estuaries, migrating into freshwater rivers to spawn. Landlocked populations reside in large freshwater lakes. They prefer cool, well-oxygenated waters with sandy or gravelly substrates.
- Areale geografico
- Widespread in coastal and inland waters of Europe, from the Baltic Sea and North Sea coasts, extending south to the Bay of Biscay, and north to the White Sea. Landlocked populations are found in various large lakes across this range, including parts of Scandinavia, Russia, and Central Europe.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: peaceful
- Dieta: carnivore
- Dimensione minima della vasca: Not suitable for typical home aquaria due to specific environmental needs and schooling behavior. Requires very large, specialized coldwater setups.
- Temperatura: 4-15°C (39-59°F)
- Livello di pH: 6.5-8.0
- Durezza: 5-20 dGH
- Compatibilità: Best kept in species-specific tanks or with other coldwater, non-aggressive fish of similar size that tolerate similar environmental conditions. Avoid warm-water or aggressive species.
- Requisiti speciali: Requires highly oxygenated, very clean, cold water with strong filtration and flow. Sensitive to elevated temperatures and poor water quality. Needs ample swimming space and a schooling environment (minimum of 6-10 individuals). Live or frozen small invertebrates and fish are essential for diet. Not recommended for novice aquarists.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Spawning runs typically occur in late winter to early spring (February-May), making them more accessible during these months. Available commercially year-round through various fishing methods, but fresh availability peaks during spawning.
- Prezzo di mercato: Varies significantly by region and season, often considered a delicacy. Prices can range from moderate to high.
- Importanza commerciale: medium
- Sapore: Delicate, mild, slightly sweet, often described as having a fresh 'cucumber' aroma when raw.
- Consistenza: Fine-flaked, tender, and moist.
- Metodi di cottura: Fried (whole, often breaded), Baked, Grilled, Smoked, Pickled
- Valore nutrizionale: Good source of protein, Omega-3 fatty acids, and various vitamins and minerals (e.g., Vitamin D, B12, selenium).
Fatti chiave
Cucumber Scentinteresting
The European Smelt is famously known for emitting a distinct odor reminiscent of fresh cucumbers when it is caught or handled, a characteristic that aids in its identification.
Anadromous and Landlocked Formsbehavior
This species exhibits both anadromous populations, which migrate from saltwater to freshwater to spawn, and entirely freshwater landlocked populations found in lakes, showcasing remarkable adaptability.
Forage Fishinteresting
European Smelt play a crucial role in aquatic ecosystems as a primary forage fish, serving as a significant food source for larger predatory fish, birds, and marine mammals.
Schooling Behaviorbehavior
Smelt are highly social fish, forming large schools, especially during their spawning migrations, which can involve thousands of individuals.
Sensitive to Pollutioninteresting
Due to their preference for clean, well-oxygenated water, European Smelt are often considered indicators of good water quality, and their populations can be negatively impacted by pollution.
Informazioni di sicurezza
Sicuro- Livello di sicurezza: safe
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: No specific handling precautions are required beyond standard fish handling practices. They are not venomous and do not possess sharp spines that pose a significant threat. Their scales are easily shed, so handle gently if appearance is important.
Specie simili
Rainbow Smelt
Osmerus mordax
Osmerus mordax (Rainbow Smelt), found in North America, is very similar in appearance and ecology. Differentiating features can be subtle and often require meristic counts (e.g., fin ray counts, lateral line scales) or genetic analysis. Generally, O. eperlanus tends to have a slightly more slender body and a smaller eye relative to head size compared to O. mordax, but these are not always reliable field marks.
European Pilchard (Sardine)
Sardina pilchardus
While also a small, silvery fish, the European Pilchard lacks an adipose fin, has a more compressed body, and typically has a more rounded snout. Its scales are also more firmly attached than those of the smelt.
Sprat
Sprattus sprattus
Sprat is another small, silvery fish found in similar habitats. It lacks an adipose fin, has a more compressed body, and a keeled belly with sharp scutes. Its mouth is smaller and lacks the prominent teeth of the smelt.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Osmeriformes
- Famiglia
- Osmeridae
- Genere
- Osmerus
- Specie
- eperlanus
Esplora European Smelt
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