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Siluriformes (Catfishes) >
Schilbeidae (Schilbid catfishes)
Etymology: Irvineia: It is the name of a seaweed; voltae: Referring to the type locality of this species, the Volta River (Ref. 43912).
More on author: Trewavas.
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の. Tropical; 6°N - 5°N
Africa: endemic to the lower Volta in Ghana (Ref. 43912, 57127).
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 19.0 cm SL オス/雌雄の選別がない; (Ref. 57127)
簡単な記述
検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 1; 背鰭 (合計) : 6; 臀鰭: 58 - 68. Diagnosis: posterior (=inner) side of pectoral-fin spines strongly denticulate; 58-68 branched anal-fin rays; 16-18 gill rakers on lower limb of first gill arch; barbels very short, nasal barbel extending to hind margin of eye; adipose fin always present; swim bladder extending backwards through a caecal appendix to above end of anal-fin base (Ref. 43912, 57127). Palatine teeth present (Ref. 57127). Posterior nostrils closer to each other than are anterior ones; 7-9 branched pelvic fin rays (Ref. 43912).
Probably carnivorous, feeding at least partly on small crustaceans (Ref. 43912). Oviparous, eggs are unguarded (Ref. 205).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生
Distinct pairing (Ref. 205).
De Vos, L., 2003. Schilbeidae. p. 97-116 In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douce et saumâtres de l'Afrique de l'Ouest, Tome 2. Coll. Faune et Flore tropicales 40. Musée Royal de l'Afrique Centrale, Tervuren, Belgique, Museum National d'Histoire Naturalle, Paris, France and Institut de Recherche pour le Développement, Paris, France. 815 p. (Ref. 57127)
IUCNのレッドリストの状況は (Ref. 130435)
絶滅危惧 (EN) (B1ab(iii)); Date assessed: 30 November 2019
Human uses
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 手段, １．４年～４．４年の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (13 of 100).
