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Centrarchiformes (Basses) >
Oplegnathidae (Knifejaws)
Etymology: Oplegnathus: Greek, hoplon = weapon + Greek, gnathos = jaw (Ref. 45335).
Eponymy: David Barry Conway (d: 1832) was a Royal navy surgeon who was medical superintendant on two different convict ships to Australia. [...] (Ref. 128868), visit book page.
More on author: Richardson.
Environment: milieu / climate zone / depth range / distribution range
Écologie
marin récifal; profondeur ? - 150 m. Subtropical; 28°S -
Western Indian Ocean: South Africa.
Taille / Poids / Âge
Maturity: Lm ?  range ? - ? cm
Max length : 90.0 cm TL mâle / non sexé; (Ref. 4387)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Épines dorsales (Total) : 12; Rayons mous dorsaux (Total) : 11 - 14; Épines anales: 3; Rayons mous anaux: 11 - 13.
Found in coastal waters down at a depth of about 150 m. Adults found near reefs, juveniles found near floating objects. Feed on benthic invertebrates and algae (Ref. 5213). May live longer than 10 years. Spawning occurs throughout the year (Ref. 57746). Rarely hooked but easily speared (Ref. 4387).
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
van der Elst, R., 1981. A guide to the common sea fishes of southern Africa. C. Struik, Cape Town. 367 p. (Ref. 3670)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2024-1)
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: commercial; pêche sportive: oui
Outils
Articles particuliers
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Sources Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 2.7 ±0.24 se; based on food items.
Résilience (Ref.
120179): Faible, temps minimum de doublement de population : 4,5 à 14 années (tmax > 10).
Fishing Vulnerability (Ref.
59153): High vulnerability (56 of 100).
Nutrients (Ref.
124155): Calcium = 19.4 [8.6, 35.0] mg/100g; Iron = 0.515 [0.294, 0.877] mg/100g; Protein = 19.3 [18.1, 20.5] %; Omega3 = 0.148 [0.083, 0.264] g/100g; Selenium = 26.6 [12.9, 56.1] μg/100g; VitaminA = 14.8 [3.5, 62.2] μg/100g; Zinc = 0.602 [0.387, 0.917] mg/100g (wet weight);