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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
生态学
; 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 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 14.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 2246); 最大体重: 41.00 g (Ref. 2246)
背棘 (总数): 0; 背的软条 (总数): 15-18; 臀棘 0; 臀鳍软条: 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).
身体中等的, 有时深的。 前胸的鳞甲呈现 (13-18 腹鳍前的在第一胸鳍鳍条的基底之前有 1-2 个; 8-10 后). 第一个胸的鳞甲长达或比其它更小缺乏上手臂。 下颌强烈突出, 在愈合处有强的犬齿。 下鳃耙短.(少于对应的鳃丝) 银色的斑纹沿着侧面。 用它的较少的鳃耙有别于 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).
出现于河川与溪流与在人造的湖佛塔河的最河部份中, 例如 Yegi 与 Kete Krachi。 吃小鱼, 包括它自己的稚鱼 , 与吃水生昆虫。 可能溯河回游繁殖。
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
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)
人类利用
渔业: 自给性渔业
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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).
营养阶层 (Ref.
69278): 4.3 ±0.75 se; based on food items.
回复力 (Ref.
120179): 高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
