分类 / Names
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Teleostei >
Clupeiformes (Herrings) >
Dorosomatidae (Gizzard shads and sardinellas)
Etymology: Microthrissa: Grek, mikros = small + Greek, thrissa, -es = shad (Ref. 45335).
More on author: Poll.
Environment: milieu / climate zone / 深度上下限 / distribution range
生态学
; 淡水 大洋性. 熱帶; 3°N - 7°S
Africa: Congo River system in Dungu River and its tributary Garamba River (Ref. 188), and Lower Congo River (Ref. 188) in Democratic Republic of the Congo (Ref. 47399). Also reported as Microthrissa cf. minuta from mouth of Niemba River, Lukuga River, an outflow of Lake Tanganyika, in Democratic Republic of the Congo (Ref. 93587).
非洲: 在棟占河與它的支流的剛果河上游流域, 加蘭巴河; 也剛果河下游。
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 4.3 cm SL 雄鱼/尚未辨别雌雄; (Ref. 47399)
背棘 (总数) : 0; 背的软条 (总数) : 12 - 15; 臀棘: 0; 臀鳍软条: 18 - 21; 脊椎骨: 40 - 44. Diagnosis: Body moderately deep, its depth about 22-30% of standard length; scutes strongly keeled, 1 or 2 before base of first pectoral fin ray, 11-12 pre-pelvic and 6-8 post-pelvic scutes; snout pointed; lower jaw not or slightly projecting, included in upper when mouth closed, with small teeth limited to anterior part; pre-maxilla with 12-30 small conical teeth directed inwards; maxilla blade slender, more than 3 times as long as deep, upper edge with a ridge flared outward; posterior supra-maxilla small, spatulate, shaft as long as blade; lower gillrakers 18-22 (Ref. 188, 47399, 93833). Also characterized by 37-43 scales in a longitudinal series and anal fin with 18-21 rays (Ref. 47399). It resembles Microthrissa royauxi, which has fewer gillrakers but more anal fin rays, 14-17 and 23-27 respectively (Ref. 188). It is distinguished from Microthrissa whiteheadi by a lower number of teeth on the pre-maxilla, 12-30 vs. 32-40 in M. whiteheadi; and additionally by a higher number of lower gillrakers, 18-22 vs. 14-18, a lower number of anal fin rays, 18-21 vs. 20-25, and a lower number of pre-pelvic scutes, 11-12 vs. 13-16 (Ref. 46514, 47399).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
身体中等纵深的; 鳞甲 (19 或 20 总数) 有明显的龙骨, 第一个胸鳍鳍条的基底前的 1 或 2。 吻端尖的; 下颌不是突出, 包含在上面的内当嘴巴闭合时, 在愈合处有小的齿; 颚骨细长的 (叶片超过 3 长度与深度比率), 上缘具有一个向外被摇曳的脊; 第二个上颚骨小的, 轴长达竹片状的叶片。
A riverine species (Ref. 188).
出现于河。
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
非洲: 在棟占河與它的支流的剛果河上游流域, 加蘭巴河; 也剛果河下游。
Gourène, G. and G.G. Teugels, 1989. Révision systématique du genre Microthrissa Boulenger, 1902 des eaux douces africaines (Pisces, Clupeidae). Rev. Hydrobiol. Trop. 22(2):129-156. (Ref. 47399)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-1)
人类利用
渔业: 自给性渔业
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Estimates based on models
Phylogenetic diversity index (参考文献
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00415 - 0.01826), b=3.06 (2.89 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 3.1 ±0.3 se; based on size and trophs of closest relatives
回复力 (参考文献
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).
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