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Marcusenius pongolensis (Fowler, 1934)

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

> Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Marcusenius: Becasue of J. Marcusen, author of "Zur Phauna des Schwarzen Meeres", 1867; ichthyologist.
More on author: Fowler.

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

; 新鮮な水 底生の. Tropical

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: coastal rivers draining into the Indian Ocean, ranging between tropical sections of the Limpopo River in the north and the Kosi River system in the south, including the Pongolo River which is the type river (Ref. 75962, 95448).

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 0; 背鰭 (合計): 20-23; 肛門の骨 0; 臀鰭: 26 - 28; 脊つい: 42 - 43. Diagnosis: Marcusenius pongolensis can be distinguished from its congeners by the following characters: a more slender body, elongated, smaller body depth, 19.1-26.0% of standard length; distance from dorsal fin origin to end of caudal peduncle 37.1-39.8% of standard length; distance from anal fin origin to end of caudal peduncle 40.8-42.2% of standard length; and length of anal fin 19.5-21.9% of standard length; all shorter and non-overlapping with Marcusenius krameri, M. caudisquamatus and M. lucombesi (Ref. 95448). Total vertebrae ranges between 42-43 vs. 44 in other species; posterior total gill rakers 13-14 vs. 15 and 17 in M. caudisquamatus and M. krameri, respectively; lateral line scales 70-73; scales around caudal peduncle 16-17; dorsal fin rays 20-23; anal fin rays 26-28 (Ref. 95448). Electric organ discharge (EOD) lacking a weak head-negative pre-potential, in females and juveniles Ndur of short duration, no striking sexual dimorphism in EOD waveform present, but longer EOD duration and statistically significant increase with standard length in males (Ref. 75962).

生物学     用語集 (例 epibenthic)

During the day Marcusenius pongolensis is often encountered below undercut river banks, especially in dense network of tree roots; places where there is a countercurrent seem to be especially attractive; in Swaziland it has been observed high up in river systems with rapid water flow and rocky substrate in Swaziland (Ref. 75962).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | | 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

Kramer, B., P. Skelton, H. van der Bank and M. Wink, 2007. Allopatric differentiation in the Marcusenius macrolepidotus species complex in southern and eastern Africa: the resurrection of M. pongolensis and M. angolensis, and the description of two new species (Mormyridae, Teleostei). J. Nat. Hist. 41(9-12):647-708. (Ref. 75962)

IUCNのレッドリストの状況は (Ref. 125652)

  軽度懸念 (LC) ; Date assessed: 30 November 2016

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業:
FAO - Publication: search | FishSource |

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国々
国連食糧農業機関の区域
エコシステム
事件
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Stocks
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食品種目概要について
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共通名の
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捕食動物
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成熟
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卵の集合体
生産力

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Age/Size
成長
体長-重さ
Length-length
体長組成
形態計測学
形態学
幼生
幼生の動力
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参考文献
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水産養殖の紹介
緊張
遺伝子の
対立遺伝子頻度
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シガテラ(食中毒の名前)
速度
泳ぐ 型式
カマ
Otoliths

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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=0.00562 (0.00246 - 0.01284), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.1   ±0.4 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 (19 of 100).