分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Centrarchiformes (Basses)
鱸形目 (Basses) >
Percichthyidae (Temperate perches)
鮨鱸科 (Temperate perches)
Etymology: Nannoperca: Latin, nannus = small + Greek, perke = perch (Ref. 45335); pygmaea: The specific epithet is the feminised form of the Latin noun 'pygmaeus' meaning 'dwarf', referring to it being the smallest of the pygmy perches; noun in apposition.
applied as a noun in apposition, and in Common name
Little Pygmy Perch applied in recognition of the relative small size..
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水; 半鹹淡水 底中水層性. ; 34°S - 35°S, 117°E - 118°E (Ref. 93277)
Oceania: Western Australia. The rarity of the species and restricted range requires urgent protection at the state and federal level.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 3.9 cm SL 雄魚/尚未辨別雌雄; (Ref. 93277)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背棘 (總數) : 7 - 9; 背的軟條 (總數) : 8; 臀棘: 3; 臀鰭軟條: 6 - 7. This species is distinguished by the following characters: small mouth; deeply notched dorsal fin; poorly developed two-part and interrupted lateral line; differs from N. australis, N. oxleyana and N. variegata in having an exposed and serrated preorbital bone and jaws just reaching to below the anterior margin of the eye (vs. a smooth and hidden preorbital and the jaws reaching to at least the pupil); from N. vittata by having 5-10 thin lateral stripes most obvious below lateral line and poorly developed tube scales (vs. well developed), a more distinct haloed blackish spot resembling an ocellus at the base of the caudal fin, the hind margin of the scales on the caudal peduncle are without distinct pigment, and the belly is without a colour pattern; from N. obscura in having a distinct ocellus at the base of caudal fin (vs. an indistinct barring), as well as a dark spot behind operculum and lack of dusky scale margins; from N. balstoni, in having an exposed rear edge of the preorbital (vs. hidden under the skin), fewer transverse scale rows (13 vs. 15-16), a smaller mouth (rarely reaching eye vs. reaching well beyond the eye), ctenoid body scales (vs. cycloid), generally fewer pectoral rays and a smaller maximum size (Ref. 93277).
The species is rare and restricted in its range. Inhabits tannin stained, acidic and shallow Melaleuca rhaphiophylla streams (Ref. 93277).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
Morgan, D.L., S.J. Beatty and M. Adams, 2013. Nannoperca pygmaea, a new species of pygmy perch (Teleostei: Percichthyidae). Zootaxa 3637(4):401-411. (Ref. 93277)
IUCN 瀕危狀態 (Ref. 130435)
瀕危 (EN) (B1ab(i,ii,iii,v)+2ab(i,ii,iii,v)); Date assessed: 09 January 2019
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00408 - 0.02815), b=3.01 (2.79 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.1 ±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).
