分類 / Names
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Centrarchiformes (Basses) >
Oplegnathidae (Knifejaws)
Etymology: Oplegnathus: Greek, hoplon = weapon + Greek, gnathos = jaw (Ref. 45335).
Eponymy: John Benjamin Romer Robinson (1869–1949) was a South African attorney and businessman. [...] (Ref. 128868), visit book page.
More on author: Regan.
Environment: milieu / climate zone / depth range / distribution range
生態学
海 関連する礁; 深さの範囲 20 - 100 m (Ref. 4387). Subtropical
Western Indian Ocean: occurs only in Mozambique and Natal, South Africa.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 60.0 cm TL オス/雌雄の選別がない; (Ref. 4387); common length : 40.0 cm TL オス/雌雄の選別がない; (Ref. 9660)
背面の脊椎 (合計) : 11; 背鰭 (合計) : 20 - 24; 肛門の骨: 3; 臀鰭: 14 - 17. Adults dark grey in color; juveniles yellow with black bars (very similar to young Diplodus cervinus hottentotus.
Occur in coastal rocky and coral reefs to a depth of 100 m; juveniles pelagic in currents (Ref. 4332). Benthic omnivores. May live longer than 10 years. Spawning occurs throughout the year (Ref. 57746). Marketed fresh (Ref. 9660).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Heemstra, P.C., 1986. Oplegnathidae. p. 632-633. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 4387)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-2)
Human uses
水産業: 商業; ゲームフィッシュ: はい
用具
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インターネットの情報源
Estimates based on models
Preferred temperature (Ref.
123201): 23.6 - 26.7, mean 25.8 °C (based on 16 cells).
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).
栄養段階 (Ref.
69278): 3.2 ±0.42 se; based on food items.
回復力 (Ref.
120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (tmax > 10).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (44 of 100).
