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Pimelodus pictus, commonly known as the Pictus Catfish, is a small to medium-sized freshwater catfish belonging to the family Pimelodidae. It is characterized by its striking silvery body adorned with numerous black spots, long barbels, and an active, schooling nature. These fish are nocturnal predators in their natural habitat, relying on their keen sense of smell and touch via their barbels to locate food. They are popular in the aquarium trade due to their attractive appearance and relatively manageable size.
Körperliche Merkmale
- Körperform
- torpedo
- Färbung
- Silvery-white to light grey body covered with numerous distinct, irregularly shaped black spots. The fins are typically translucent with some spotting, and the caudal fin is often forked with dark tips on the lobes.
- Schuppentyp
- none
- Maulstellung
- terminal
- Besondere Merkmale
- Long, prominent barbels (two maxillary, four mental) that extend well past the pectoral fins, sometimes reaching the caudal fin base., Adipose fin present, typical of catfishes., Strong, serrated spines in the dorsal and pectoral fins., Large, dark eyes.
- Rückenflosse
- Single, tall dorsal fin with a strong, serrated spine and soft rays. The spine can be locked upright.
- Schwanzflosse
- Deeply forked caudal fin, often with pointed lobes.
- Brustflosse
- Large, fan-like pectoral fins, each with a strong, serrated spine that can be locked.
- Auffällige Flossen
- Presence of an adipose fin, characteristic of pimelodid catfishes.
Bestimmungstipps
Coloration and Spotting
The most distinguishing feature is the silvery body with numerous, irregularly shaped black spots covering the entire body and often extending onto the fins. The intensity and size of spots can vary slightly between individuals.
Barbels
Possesses exceptionally long barbels, particularly the maxillary barbels, which can be as long as or longer than the body itself. These are crucial sensory organs.
Fin Spines
The dorsal and pectoral fins each have a prominent, serrated spine that can be locked into position, a common defense mechanism in catfishes.
Body Shape
A streamlined, torpedo-shaped body adapted for swift movement in flowing waters.
Lebensraum
- Wassertyp
- freshwater
- Tiefe
- Typically found in shallow to moderate depths, often near the bottom or in areas with submerged vegetation and roots.
- Umgebung
- Native to fast-flowing rivers and tributaries, as well as calmer backwaters and floodplains. They prefer areas with good oxygenation and plenty of cover.
- Geografische Verbreitung
- South America, primarily in the Orinoco and Amazon River basins, including countries like Venezuela, Colombia, Peru, and Brazil.
Aquarieninformationen
- Pflegeaufwand: intermediate
- Temperament: semi-aggressive
- Ernährung: carnivore
- Mindestbeckengröße: 120 liters (30 gallons) for a small group
- Temperatur: 22-26°C (72-79°F)
- pH-Wert: 6.0-7.5
- Härte: 2-12 dGH
- Verträglichkeit: Best kept with similarly sized, robust, and fast-moving fish. Avoid keeping with very small fish (e.g., neon tetras) as they may be eaten, or with slow-moving, long-finned fish (e.g., angelfish, bettas) as their fins may be nipped. They are best kept in groups of 3 or more to reduce stress and encourage natural schooling behavior.
- Besondere Anforderungen: Requires a well-filtered aquarium with plenty of hiding spots (caves, driftwood, dense planting) and open swimming areas. Substrate should be soft sand or fine gravel to protect their delicate barbels. Dim lighting is preferred, and they are most active during dusk and dawn. Good water quality is paramount.
Informationen zum Wildbestand
- Erhaltungszustand: least concern
- Saisonalität: Breeding in the wild is often tied to seasonal rainfall and flooding, which provides abundant food and suitable spawning grounds. Specific seasonal behavior patterns for Pimelodus pictus are not extensively documented beyond general catfish reproductive cycles.
- Marktpreis: Low to moderate for aquarium trade specimens.
- Kommerzielle Bedeutung: medium
- Geschmack: Not typically consumed due to small size and bony nature.
- Textur: Not typically consumed.
- Nährwert: Not typically consumed.
Wichtige Fakten
Nocturnal Huntersbehavior
Pimelodus pictus are primarily nocturnal, using their long barbels to detect food in low light conditions.
Sensitive Barbelsinteresting
Their exceptionally long barbels are highly sensitive chemosensory organs, vital for navigating and finding food in their environment. Damage to these barbels can impair their ability to feed.
Schooling Behaviorbehavior
In the wild and in captivity, Pictus Catfish exhibit schooling behavior, preferring to live in groups. This provides safety and enhances their natural social interactions.
Fast Swimmersbehavior
Their streamlined body shape and powerful caudal fin make them agile and fast swimmers, well-suited to their riverine habitats.
Spiny Defensebehavior
The strong, serrated spines in their dorsal and pectoral fins serve as a defense mechanism against predators, allowing them to lock the spines upright to deter attacks.
Sicherheitsinformationen
Vorsichtig behandeln- Sicherheitsstufe: caution
- Giftig: Nein
- Essbarkeit: not recommended
- Hinweise zum Umgang: The dorsal and pectoral fins possess sharp, serrated spines that can inflict a painful puncture wound. While not venomous, these wounds can become infected if not properly cleaned. Exercise caution when handling, using a net or thick gloves to avoid direct contact with the spines. They are also very active and can jump out of nets or tanks.
Ähnliche Arten
Pimelodus blochii
Pimelodus blochii
Pimelodus blochii typically has fewer, larger, and more regularly spaced spots compared to the numerous, smaller, and irregular spots of P. pictus. P. blochii also tends to grow significantly larger.
Pimelodus maculatus
Pimelodus maculatus
Pimelodus maculatus generally has larger, more defined spots that are often arranged in rows or patterns, and its body shape can be more robust. It also attains a larger size than P. pictus.
Other Pimelodus species
Various Pimelodus species
Differentiation from other Pimelodus species often relies on subtle differences in spot pattern, body proportions, fin morphology, and meristic counts (e.g., fin ray counts, vertebral counts). P. pictus is generally one of the smaller, more heavily spotted species in the genus.
Wissenschaftliche Klassifikation
- Reich
- Animalia
- Stamm
- Chordata
- Klasse
- Actinopterygii
- Ordnung
- Siluriformes
- Familie
- Pimelodidae
- Gattung
- Pimelodus
- Art
- Pimelodus pictus
Pictus Catfish entdecken
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