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); borealis: From the Latin "borealis" = northern, named for its occurrence in the extreme north of Lake Malawi (Wissman Bay in Tanzania)(Ref. 55898).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性; 深度上下限 53 - 61 m (Ref. 55898).
Africa: endemic to Lake Malawi, only known from Wissman Bay in Tanzania (Ref. 55898).
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 6.5 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) : 17; 背的軟條 (總數) : 9; 臀棘: 3; 臀鰭軟條: 8. Diagnosis: head length 35.7 %SL; snout length 30.4 % head length; snout pointed; lower jaw length 37.4 % head length; outer oral dentition well developed bicuspid; gape inclined at about 20° from horizontal; premaxillary pedicel length 26.5 % head length; cheek depth 22.6 % head length; eye diameter 34.8 % head length; body depth 37.2 %SL (Ref. 55898).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Hanssens, M., 2004. The deep-water Placidochromis species. p. 104-197. In J. Snoeks (ed.) The cichlid diversity of Lake Malawi/Nyasa/Niassa: identification, distribution and taxonomy. Cichlid Press, El Paso, USA. (Ref. 55898)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
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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=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.2 ±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).
