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Diplodus sargus capensis, commonly known as Sargo-preto or Cape White Seabream, is a subspecies of the White Seabream (Diplodus sargus) endemic to the coastal waters of Southern Africa. It is a demersal fish characterized by its silvery body, distinct black caudal spot, and several vertical dark bands that fade with age. This subspecies is highly valued in recreational and commercial fisheries due to its palatable flesh and fighting qualities.
Características físicas
- Formato do corpo
- compressed
- Coloração
- Silvery-grey body, often with 8-9 faint vertical dark bands (more prominent in juveniles, fading with age). A distinct, prominent black spot is present on the caudal peduncle, extending onto the caudal fin base. Fins are generally dusky or translucent.
- Tipo de escama
- ctenoid
- Posição da boca
- terminal
- Características distintivas
- Prominent black spot on the caudal peduncle, Silvery body with faint vertical bands (especially in younger individuals), Relatively deep body, laterally compressed, Small, terminal mouth with incisor-like teeth anteriorly and molariform teeth posteriorly
- Nadadeira dorsal
- Single dorsal fin with 11-12 spines and 13-16 soft rays. The spiny portion is longer than the soft-rayed portion.
- Nadadeira caudal
- Moderately forked caudal fin, with the black spot extending onto its base.
- Nadadeira peitoral
- Long and pointed pectoral fins.
- Nadadeiras características
- Anal fin with 3 spines and 12-14 soft rays. Pelvic fins are thoracic.
Dicas de identificação
Caudal Spot
The most reliable identifier is the distinct, dark black spot on the caudal peduncle, which often extends onto the base of the caudal fin. This spot is usually very clear and well-defined.
Body Bands
While present, the vertical dark bands on the body are often faint, especially in larger adults, and can be difficult to discern compared to other Diplodus species.
Body Shape
Its relatively deep and compressed body shape is typical of the seabream family (Sparidae).
Geographic Location
Its restricted geographic range to Southern African waters is a key differentiating factor from other Diplodus subspecies found elsewhere.
Habitat
- Tipo de água
- saltwater
- Profundidade
- Typically found in shallow coastal waters from the surf zone down to about 50 meters (164 feet), occasionally deeper.
- Ambiente
- Prefers rocky reefs, kelp beds, sandy areas adjacent to reefs, estuaries, and surf zones. Juveniles often inhabit sheltered bays and estuaries. They are often found in areas with strong currents and good water movement.
- Distribuição geográfica
- Endemic to the coastal waters of Southern Africa, specifically from Namibia around the Cape of Good Hope to KwaZulu-Natal, South Africa.
Informações sobre aquário
- Nível de cuidado: advanced
- Temperamento: semi-aggressive
- Alimentação: omnivore
- Tamanho mínimo do aquário: 500 gallons
- Temperatura: 18-24°C (64-75°F)
- Nível de pH: 8.1-8.4
- Dureza da água: 8-12 dKH
- Compatibilidade: Best kept in a species-specific tank or with other large, robust, and similarly tempered marine fish. Avoid keeping with smaller, timid species or those with long, flowing fins.
- Requisitos especiais: Requires a large tank with ample swimming space and plenty of rockwork for shelter. Excellent filtration and stable water parameters are crucial. A varied diet of high-quality pellets, frozen foods (shrimp, squid, krill), and some vegetable matter is recommended. Can be prone to aggression towards conspecifics if not introduced carefully or if the tank is too small.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: Can be caught year-round, but peak seasons for angling often coincide with warmer months when they are more active and closer to shore. Spawning aggregations can influence local availability.
- Preço de mercado: Varies significantly based on region and season, often considered a premium table fish.
- Importância comercial: medium
- Sabor: Mild, delicate, and slightly sweet
- Textura: Firm, flaky white flesh
- Métodos de preparo: Grilled, Baked, Fried, Steamed
- Valor nutricional: Good source of lean protein, Omega-3 fatty acids, and essential vitamins and minerals.
Fatos principais
Subspecies Statusevolution
Diplodus sargus capensis is considered a subspecies of the widespread White Seabream (Diplodus sargus) complex, highlighting regional genetic and morphological differentiation.
Dietary Flexibilitybehavior
Sargo-preto are opportunistic omnivores, feeding on a wide range of invertebrates (crabs, worms, mollusks) and some algal matter, adapting their diet to local availability.
Angler's Delightinteresting
Highly sought after by recreational anglers in Southern Africa due to its strong fighting capabilities and excellent table quality.
Habitat Generalistsbehavior
They can be found in diverse coastal habitats, from turbulent surf zones to calmer estuarine environments, showcasing their adaptability.
Protogynous Hermaphroditesbehavior
Like many sparids, Sargo-preto are believed to be protogynous hermaphrodites, meaning they start life as females and can later change sex to male, though this can vary within the Diplodus sargus complex.
Informações de segurança
Seguro- Nível de segurança: safe
- Venenoso: Não
- Comestibilidade: edible
- Observações de manuseio: No specific venomous spines. Standard care should be taken when handling any fish to avoid fin pricks, which can be painful but are not venomous. Their dorsal and anal fin spines are sharp.
Espécies similares
White Seabream
Diplodus sargus sargus
The nominate subspecies found in the Mediterranean and Eastern Atlantic. While very similar, D. sargus capensis is geographically isolated and may exhibit subtle morphological differences, though the caudal spot is a shared feature across the D. sargus complex. Genetic analysis is often required for definitive subspecific identification.
Red Steenbras
Petrus rupestris
Larger, more robust body, reddish coloration, and lacks the distinct black caudal spot. Found in similar habitats but is a different genus.
Blacktail
Diplodus capensis
Historically, 'Blacktail' was often used interchangeably or confused with Sargo-preto. However, Diplodus capensis (the true Blacktail) is a distinct species, generally smaller, with a more pronounced and often larger black caudal spot that can extend further onto the fin, and typically has more prominent dark vertical bands even as an adult. The snout profile can also differ.
Classificação científica
- Reino
- Animalia
- Filo
- Chordata
- Classe
- Actinopterygii
- Ordem
- Spariformes
- Família
- Sparidae
- Gênero
- Diplodus
- Espécie
- Diplodus sargus
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