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Opsaridium microcephalum (Günther, 1864)

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Opsaridium microcephalum
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Malawi country information

Common names: Lake trout, Sanjika
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from Thumbi West Island and Zimbawe Rock (Ref. 55909). Also Ref. 5595.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/mi.html
National Fisheries Authority: http://isp.msu.edu/AfricanStudies/Plea/mfri.htm
Occurrences: Occurrences Point map
Main Ref: Snoeks, J., 2004
National Database:

Common names from other countries

Lake trout, Pstruhovec drobnohlavý, Sanjika-norjasdaanio, ... more

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Cypriniformes (Carps) > Danionidae (Danios) > Chedrinae
Etymology: Opsaridium: Greek, opsarion, -ou = a little portion fish (Ref. 45335).
  More on author: Günther.

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

; 淡水 居於水底的; 河川洄游 (Ref. 51243).   熱帶; 9°S - 15°S

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Africa: Lake Malawi (Nyassa) and upper Shire.
非洲: 馬拉威湖 (Nyassa) 與雪利河上游。

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm 23.7  range ? - ? cm
Max length : 34.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 2801)

生物學特性     字彙 (例如 epibenthic)

Inhabits lake, but some migrate to rivers to breed (Ref. 4967). Also caught using dip nets. Found in shallow water over sandy bottoms. Feeds on usipa, Engraulicypris sardella (Ref. 5595).

棲息於湖，但是一些迴游到河繁殖。 (參考文獻 4967) 也使用抄網捕捉。 發現於淺水區沙質底部之上了。 吃 usipa ，沙丁鯷波魚〔Engraulicypris sardella〕。 (參考文獻 5595)

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚

非洲: 馬拉威湖 (Nyassa) 與雪利河上游。

主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

Lévêque, C. and J. Daget, 1984. Cyprinidae. p. 217-342. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 2801)

IUCN 瀕危狀態 (Ref. 130435)

  無危 (LC) ; Date assessed: 22 May 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的




人類使用

漁業: 低經濟; 水族館: 商業性
FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5002   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00708 (0.00316 - 0.01588), b=3.05 (2.86 - 3.24), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.4   ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (24 of 100).
價格種類 (Ref. 80766):   Unknown.