分類 / Names
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Teleostei >
Clupeiformes (Herrings) >
Dorosomatidae (Gizzard shads and sardinellas)
Etymology: Odaxothrissa: Greek, odax, = with the teeth + Greek, thrissa, -es = shad (Ref. 45335); mento: The specific epiteth mento, from the Latin mentum meaning 'chin', is made in allusion of the prominent lower jaw (Ref. 54749).
More on author: Regan.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 大洋性; 河川洄游 (Ref. 51243). 熱帶; 13°N - 2°S
Africa: lower parts of Volta and Niger basins (Ref. 188, 3509, 54749), including Benue River (Ref. 188, 81269); also from Cross River in Nigeria to Wouri River in Cameroon (Ref. 188, 81631). Apparently not in Congo River basin (Ref. 188).
非洲: 淡水 (佛塔河與尼日河流域的下部, 也貝努埃河下游與喀麥隆的河; 顯然地不在剛果河流域).
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 14.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 2246); 最大體重: 41.00 g (Ref. 2246)
背棘 (總數): 0; 背的軟條 (總數): 15-18; 臀棘 0; 臀鰭軟條: 18 - 21; 脊椎骨: 42 - 44. Diagnosis: Body moderate, sometimes deep, its depth 25% of standard length or more; 13-18 pre-pelvic and 8-10 post-pelvic scutes, 1-2 scutes before pectoral fin origin, first pre-pectoral scute as long as, or smaller than, following scutes without ascending arms; lower jaw strongly projecting, with strong canine teeth at symphysis; pre-maxilla with 2-4 strong backward-pointing canine teeth on each side behind outer row of pre-maxillary teeth; lower gillrakers 16-19, shorter than corresponding gill filaments; anal fin with 18-21 rays; silver stripe along flank (Ref. 188, 54749, 81269, 81631). It resembles Odaxothrissa ansorgii, which has more gillrakers, 22-33 vs. 16-19; and Pellonula vorax, which lacks canine teeth in the upper jaw and has longer gillrakers, equal in length to gill filaments vs. shorter (Ref. 188, 54749).
身體中等的, 有時深的。 前胸的鱗甲呈現 (13-18 腹鰭前的在第一胸鰭鰭條的基底之前有 1-2 個; 8-10 後). 第一個胸的鱗甲長達或比其它更小缺乏上手臂。 下頜強烈突出, 在瘉合處有強的犬齒。 下鰓耙短.(少於對應的鰓絲) 銀色的斑紋沿著側面。 用它的較少的鰓耙有別於 C. ansorgii 。
Found in rivers and streams, also in the man-made Lake Volta, but only in the most riverine parts (Ref. 188). It feeds on small fishes, including its own juveniles, and aquatic insects (Ref. 188, 2246). Possibly migrates upstream to breed (Ref. 188). It enters artisanal fisheries, but catches are small (Ref. 188).
出現於河川與溪流與在人造的湖佛塔河的最河部份中, 例如 Yegi 與 Kete Krachi。 吃小魚, 包括它自己的稚魚 , 與吃水生昆蟲。 可能溯河迴游繁殖。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
非洲: 淡水 (佛塔河與尼日河流域的下部, 也貝努埃河下游與喀麥隆的河; 顯然地不在剛果河流域).
Gourène, G. and G.G. Teugels, 1994. Synopsis de la classification et phylogénie des Pellonulinae de l'Afrique Occidentale et Centrale (Teleostei; Clupeidae). J. Afr. Zool. 108(1):77-91. (Ref. 28136)
人類使用
漁業: 自給性漁業
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00504 - 0.01437), b=2.91 (2.77 - 3.05), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
營養階層 (Ref.
69278): 4.3 ±0.75 se; based on food items.
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
