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Irvineia voltae Trewavas, 1943

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drawing shows typical species in Schilbeidae.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Teleostei > 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 生態學

; 淡水 居於水底的. ; 6°N - 5°N

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Africa: endemic to the lower Volta in Ghana (Ref. 43912, 57127).

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 19.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 57127)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

背棘 (總數) : 1; 背的軟條 (總數) : 6; 臀鰭軟條: 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).

生物學特性     字彙 (例如 epibenthic)

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 | 仔魚

Distinct pairing (Ref. 205).

主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

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 瀕危狀態 (Ref. 130435)

  瀕危 (EN) (B1ab(iii)); Date assessed: 30 November 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 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).
營養階層 (Ref. 69278):  3.3   ±0.5 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (13 of 100).