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Centrarchiformes (Basses) >
Percichthyidae (Temperate perches) > Percichthyinae
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.
محیط زیست: محیط زیست / منطقه آب و هوایی / تغييرات عمق / محدوده توزیع
بوم شناسي
; آب شيرين; لب شور موجوداتی که در محدوده وسیعی از آبهای آزاد از نزدیک بستر و یا روی کف بستر، در قسمت های میان آبی تا سطح آب و در برخی گونه ها با قابلیت پرواز، زندگی و تغذیه می کنند.. Subtropical; 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.
اندازه / وزن / سن
بلوغ: Lm ?  range ? - ? cm
Max length : 3.9 cm SL جنس نر / بدون خواص جنسي; (Ref. 93277)
توصيف مختصر
كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
خارهاي باله پشتي (کل) : 7 - 9; شعاع نرم باله پشتي (کل) : 8; خارهاي باله مخرجي: 3; شعاع نرم باله مخرجي: 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).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
The species is rare and restricted in its range. Inhabits tannin stained, acidic and shallow Melaleuca rhaphiophylla streams (Ref. 93277).
چرخه زندگی و رفتار جفتگیری
بلوغ | تولید مثل | تخم ریزی | تخم ها | باروری | توزاد ( لارو)
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)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2025-2 (Global))
در معرض خطر (EN) (B1ab(i,ii,iii,v)+2ab(i,ii,iii,v)); Date assessed: 09 January 2019
خطر برای انسان ها
Harmless
استفاده انسانی
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
تخمینها بر اساس مدلها
شاخص تنوع فیلوژنتیکی (مرجع
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00397 - 0.02763), b=3.01 (2.78 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
سطح تروفیک (مرجع
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
جهندگی (مرجع
120179): زياد, كمينه زمان لازم براي دو برابر شدن جمعيت ، كمتر از 15 ماه (Preliminary K or Fecundity.).
آسیبپذیری ماهیگیری (Ref.
59153): Low vulnerability (10 of 100).
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