分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Beloniformes (Needle fishes) >
Belonidae (Needlefishes)
Etymology: Potamorrhaphis: Greek, potamos = river + Greek, rhaphis = needle (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 大洋性; 深度上下限 0 - ? m.
South America: upper Orinoco and Negro River basins.
大小 / 重量 / 年齡
Maturity: Lm ?  range ? - ? cm
Max length : 24.6 cm SL 雄魚/尚未辨別雌雄; (Ref. 40653)
簡短描述
型態特徵 | 形態測量圖
背棘 (總數): 0; 背的軟條 (總數): 37-43; 臀棘 0; 臀鰭軟條: 32 - 39; 脊椎骨: 77 - 85. Most similar to P. guianensis from which it differs most markedly in higher numbers of dorsal and anal fin rays, vertebrae, and predorsal scales. Predorsal scales 109-143, mean 130.5.
Oviparous (Ref. 205). Eggs may be found attached to objects in the water by tendrils on the egg's surface (Ref. 205).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Collette, B.B., 1982. South American freshwater needlefishes of the genus Potamorrhaphis (Beloniformes: Belonidae). Proc. Biol. Soc. Wash. 95(4):714-747. (Ref. 10994)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [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): 3.9 ±0.6 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 (20 of 100).