Mastacembelus simbi

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Mastacembelus simbi Vreven & Stiassny, 2009

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分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa

> Synbranchiformes (Spiny eels) > Mastacembelidae (Spiny eels)
Etymology: Mastacembelus: Greek, mastax, -agos = bite + Greek, emballo = to throw oneself (Ref. 45335);  simbi: Named after "simbi" (simbi singular; basimbi plural) or "water spirit", once considered an ancient ancestor in the Bakongo region of Congo where the species is discovered. A noun in apposition..

Environment: milieu / climate zone / depth range / distribution range 生態学

; 新鮮な水 底生の漂泳性. Tropical; 27°C - 29°C (Ref. 84205)

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | Faunafri

Africa: lower Congo River (Ref. 84205) and the lower reaches of the Middle Congo River, just upstream of Pool Malebo (Ref. 104438).

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 7.8 cm SL オス/雌雄の選別がない; (Ref. 84205)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 23 - 26; 背鰭 (合計): 47-55; 肛門の骨 2; 臀鰭: 46 - 56; 脊つい: 68 - 71. Distinguished from all other species of Mastacembelidae by the following characters: no pterosphenoid bone in the neurocranium; no supracleithral sensory canal; no post-temporal tubules; and an infraorbital series represented by the first infraorbital only. Can be further separated from all other members belonging to Mastacembelus crassus species complex by the following combination of characters (where +1 denotes the presence of a short spine covered by skin and not externally visible): 22-25+1 dorsal spines (vs. 18-21+ in Mastacembelus aviceps and Mastacembelus crassus; eye visible at the surface of the head and relatively well developed, eye diameter 10.0-15.3% HL (vs. 4.8-7.2% HL in Mastacembelus latens; fully pigmented with a color pattern characterized by an oblique bar on the cheek and a series of vertically oriented and irregularly shaped midlateral bars most often present along the body and always present in the post-anal region (vs. depigmented in Mastacembelus latens (Ref. 84205).

生物学     用語集 (例 epibenthic)

Found in shallow, marginal habitats among rocks and rock rubble close to rapids or fast flowing water. Appears to be sympatric with or at least in close proximity to, Mastacembelus brichardi, Mastacembelus brachyrhinus and Mastacembelus crassus in Lenga Lenga where the holotype and part of paratypes were collected. Also caught elsewhere with Mastacembelus congicus and Mastacembelus paucipinnis. A 6.12 cm SL female specimen had about 15-20, seemingly mature, ovarian eggs with a maximum size of about 1.0 mm diameter. The occurrence of these large eggs may indicate that reproductive activity occurs in July, the period when the specimens were collected. Sexually mature at about 6.0 cm SL (Ref. 84205).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

Vreven, E.J. and M.L.J. Stiassny, 2009. Mastacembelus simbi, a new dwarf spiny eel (Synbranchiformes: Mastacembelidae) from the lower Congo River. Ichthyol. Explor. Freshwat. 20(3):213-222. (Ref. 84205)

IUCNのレッドリストの状況は (Ref. 130435)

  評価されなかった 

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

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インターネットの情報源

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00257 (0.00122 - 0.00544), b=2.97 (2.79 - 3.15), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.4   ±0.6 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).