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Sander lucioperca, commonly known as the Pike-perch or Zander, is a large freshwater and brackish water fish belonging to the family Percidae. It is highly valued as a food fish and a sport fish throughout its native range and in areas where it has been introduced. It is characterized by its elongated, pike-like body combined with the spiny fins typical of perches. It is an apex predator in many of its habitats, playing a significant ecological role in controlling populations of smaller fish.
Caratteristiche fisiche
- Forma del corpo
- torpedo
- Colorazione
- Dorsal side typically greenish-grey to brownish-grey, fading to silvery-white on the flanks and belly. Flanks often exhibit 8-12 indistinct, dark vertical bars, which are more pronounced in younger individuals. Fins are dusky, with the dorsal and caudal fins often mottled or spotted.
- Tipo di squame
- ctenoid
- Posizione della bocca
- terminal
- Caratteristiche distintive
- Two distinct dorsal fins: the first spiny, the second soft-rayed., Large, prominent canine teeth in both jaws, interspersed with smaller, conical teeth., Large, glassy eyes with a reflective tapetum lucidum, adapted for low-light vision., Operculum (gill cover) ends in a sharp spine.
- Pinna dorsale
- Two dorsal fins; the first is spiny with 13-17 strong spines, the second is soft-rayed with 18-22 soft rays. The two fins are distinctly separated.
- Pinna caudale
- Moderately forked caudal fin with 17-19 rays.
- Pinna pettorale
- Pectoral fins are relatively small, positioned low on the body, with 13-16 rays.
- Pinne distintive
- Pelvic fins are thoracic, located directly below the pectoral fins, with one spine and five soft rays. Anal fin has 2-3 spines and 10-14 soft rays.
Consigli per l'identificazione
Body Shape
Elongated, torpedo-shaped body, more slender than a typical perch but less so than a pike.
Dorsal Fins
Presence of two clearly separated dorsal fins: a spiny anterior fin and a soft-rayed posterior fin.
Teeth
Distinctive large canine teeth visible in the jaws, a key predatory adaptation.
Eyes
Large, somewhat glassy eyes with a reflective layer (tapetum lucidum) that aids vision in low light conditions, giving them a characteristic 'glow' in certain light.
Coloration
Greenish-grey to brownish-grey back, silvery sides, and often faint vertical bars on the flanks, especially in younger fish.
Habitat
- Tipo di acqua
- freshwater
- Profondità
- Typically found in depths ranging from 2 to 10 meters, but can inhabit deeper waters up to 30 meters.
- Ambiente
- Prefers large, turbid, and slow-flowing or standing waters such as large rivers, lakes, reservoirs, and canals. Tolerates brackish water in estuaries and coastal lagoons. Favors areas with submerged vegetation, fallen trees, or other structures for cover, but also hunts in open water. Requires hard bottoms (gravel, sand, clay) for spawning.
- Areale geografico
- Native to Eastern and Central Europe and Western Asia, from the Elbe River basin eastward to the Aral Sea basin. Widely introduced throughout Western Europe (e.g., UK, France, Spain, Italy) and parts of Asia, often for aquaculture and sport fishing, leading to established populations outside its native range.
Informazioni sull'acquario
- Livello di cura: expert
- Temperamento: aggressive
- Dieta: carnivore
- Dimensione minima della vasca: Not suitable for typical home aquariums due to large size and predatory nature. Requires very large, specialized public aquarium setups.
- Temperatura: 10-24°C (50-75°F)
- Livello di pH: 6.5-8.0
- Durezza: 5-20 dGH
- Compatibilità: Only compatible with very large, robust fish that cannot be swallowed, or kept singly. Highly predatory.
- Requisiti speciali: Requires extremely large tanks with ample swimming space, powerful filtration, and a constant supply of live or fresh dead fish as food. Not recommended for private aquarists.
Informazioni in natura
- Stato di conservazione: least concern
- Stagionalità: Spawns in spring (April-June). Fishing regulations often vary by season and region to protect spawning stocks.
- Prezzo di mercato: Varies significantly by region and season, often considered a premium white fish.
- Importanza commerciale: high
- Sapore: Mild, delicate, and slightly sweet
- Consistenza: Firm, flaky, and white
- Metodi di cottura: Pan-fried, Baked, Grilled, Poached, Smoked
- Valore nutrizionale: Lean white fish, rich in protein, low in fat, and a good source of B vitamins and minerals like phosphorus and selenium.
Fatti chiave
Nocturnal Hunterbehavior
Pike-perch are primarily crepuscular and nocturnal predators, utilizing their large, light-sensitive eyes (with a tapetum lucidum) to hunt in low-light conditions, giving them a significant advantage over many prey species.
Spawning Nestsbehavior
Unlike many other percids, male Pike-perch construct and guard nests on hard substrates (gravel, roots, submerged vegetation) where females deposit their eggs. The male actively fans and protects the eggs until they hatch.
Growth Rateinteresting
Pike-perch are known for their relatively fast growth rate, especially in productive waters, reaching marketable size quickly, which contributes to their popularity in aquaculture and commercial fisheries.
Introduced Speciesevolution
Due to its popularity as a food and sport fish, Sander lucioperca has been widely introduced outside its native range, sometimes with significant ecological impacts on native fish communities.
Top Predatorbehavior
In many of its habitats, the Pike-perch acts as a top predator, playing a crucial role in regulating populations of smaller, often cyprinid, fish species, thereby influencing the overall ecosystem structure.
Informazioni di sicurezza
Maneggiare con cura- Livello di sicurezza: caution
- Velenoso: No
- Commestibilità: edible
- Note sul maneggio: Pike-perch possess sharp spines on their dorsal and anal fins, as well as sharp opercular spines. Care should be taken when handling to avoid painful punctures. Anglers should use appropriate tools like gloves or fish grippers. The large canine teeth can also inflict a bite if not handled carefully, though they are not venomous.
Specie simili
European Perch
Perca fluviatilis
European Perch has a deeper, more compressed body, more prominent dark vertical bars, and typically red pelvic and anal fins. Its eyes are not as large or glassy, and it lacks the prominent canine teeth of the Pike-perch. The two dorsal fins are closer together, sometimes almost touching.
Walleye
Sander vitreus
Walleye is a North American species closely related to Pike-perch. Key differences include a distinct white spot on the lower lobe of the caudal fin in Walleye, which is absent in Pike-perch. Walleye generally has a more golden-brown coloration, and its spiny dorsal fin often has a dark blotch at the posterior end, which is usually absent or less defined in Pike-perch.
Pike
Esox lucius
Pike have a much more elongated, cylindrical body, a single dorsal fin positioned far back on the body near the caudal fin, and a distinctive 'duck-bill' snout. Their coloration is typically green with yellow bean-shaped spots or bars, and they lack the spiny dorsal fin characteristic of Percidae.
Classificazione scientifica
- Regno
- Animalia
- Phylum
- Chordata
- Classe
- Actinopterygii
- Ordine
- Perciformes
- Famiglia
- Percidae
- Genere
- Sander
- Specie
- Sander lucioperca
Esplora Pike-perch
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