分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Cichliformes (Cichlids, convict blennies)
鱸形目 (Cichlids, convict blennies) >
Cichlidae (Cichlids)
慈鯛科魚類 (Cichlids) > Pseudocrenilabrinae
Etymology: Placidochromis: Latin, placidus = of peaceful or tranquile appearance + Greek, chromis = a fish, perhaps a perch (Ref. 45335); polli: Named in honour of Dr. Max Poll, who was a well known Belgian ichthyologist; his revision of the Lake Tanganyika cichlids (Poll, 1956) is the most important taxonomic study of this fauna to date (Ref. 55898).
Eponymy: Dr Max Fernand Leon Poll (1908–1991) was a Belgian ichthyologist, and ‘connoisseur of the fish fauna’. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的; 深度上下限 49 - 126 m (Ref. 55898). 熱帶; 12°S - 15°S
Africa: Endemic to the southern part of Lake Malawi.
非洲: 馬拉威湖的南部的特有種。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 14.9 cm SL 雄魚/尚未辨別雌雄; (Ref. 55898)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 16 - 17; 背的軟條 (總數) : 9 - 10; 臀棘: 3; 臀鰭軟條: 8 - 9. Diagnosis: head length 32.3-34.8 %SL; head width 34.5-38.4 % head length; snout length 35.1-39.0 % head length; lower jaw length 36.4-38.8 % head length; premaxillary pedicel 28.3-30.7 % head length; outer oral dentition mainly unicuspid; lachrymal 23.1-26.1 % head length; cheek depth 19.1-23.3 % head length; interorbital width 16.2-17.8 % head length; lower pharyngeal teeth small and slender; predorsal distance 34.6-37.5 %SL; body depth 31.1-36.0 %SL (Ref. 55898).
描述: 相當延長; 背部與腹的身體輪廓均勻地中凸的, 對稱的大約水平者; 頭部背面輪廓些微中凸的眼睛上方,在眼之間凹曲; 吻直線的背面輪廓; 吻長的﹐尖的與有角的; 嘴小的; 顎骨延伸至大約一半的那吻之間的距離-頂端與垂直的在眼窩的前緣; 下頜大的; 嘴與下頜於大約 25-30個 ° 傾向了到水平的; 外部的口部生齒主要單犬齒; 齒長的, 細長的而且有些間隔; 內部的口部齒單犬齒的, 長且細的; 在頰上的 2-3個成列的鱗片; 低的咽頜相當長且細的; 所有的咽齒細的, 細長的而且靠攏在一起; 在角鰓骨上的鰓耙中等大小而尖的.(參考文獻 55463)
體色 母魚標本與不成熟的雄性: 身體淡褐色的-黃色; 在背鰭之下的 7-8 灰白的縱帶; 橫帶看得見的只有在背部一半的身體上; 背鰭灰色的具有較深色的頂端; 灰色的斜紋軟的之上背部的; 在動脈之間的薄膜上尾鰭有灰色的斑點; 臀鰭與腹鰭鰭灰白的有灰色的前緣.(參考文獻 55463) 保護了成熟的雄性: 有深色的被延伸至身體的下半部的垂直的條紋; 吻，下巴與腹面深色的; 背鰭灰色的具有深色的末端; 軟的背部深灰色的沒有斑點或斑紋; 尾鰭灰色的; 臀鰭深灰色的; 腹鰭有黑色前緣.(參考文獻 55463)
Occurs usually in sandy and muddy bottoms at great depths and regularly taken below 75 m.
在大的深度通常生活在沙泥底而且經常地採自 75 公尺以下。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
非洲: 馬拉威湖的南部的特有種。
Maréchal, C., 1991. Lethrinops. p. 233-240. In J. Daget, J.-P. Gosse, G.G. Teugels and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MRAC, Tervuren; and ORSTOM, Paris. Vol. 4. (Ref. 4985)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
無危 (LC) ; Date assessed: 20 June 2018
人類使用
漁業: 商業性; 水族館: 商業性
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特別的報告
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this 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): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
