Taxonomic Remarks
See Géry, 1977:579 for comments and Bizerril, 1994:65 for key.
Lingkungan: lingkungan / zona iklim / kisaran kedalaman / jangkauan distribusi
Ekologi
; air tawar bentopelagis. Tropical
South America: coastal basins of southeastern Brazil.
Ukuran / Berat / umur
Kematangan: Lm ?  range ? - ? cm
Max length : 8.1 cm SL jantan/; (Ref. 38376); 10.4 cm SL (female)
Inhabits streams and rivers with sandy to muddy bottom. Forages during the day mingling with schools of similarly sized and looking prey types, such as tetras of the genus Astyanax, and feeds on their scales. The resemblance of this scale-eater with its habitual prey is an example of aggressive mimicry (Ref. 40388). The fish follows closely the intended prey by placing itself obliquely to its rear; strikes at prey's flank with its mouth widely open, the scales being removed during a quick bite. Removed scales are swallowed immediately and the predator resumes schooling with its prey. The fourth dentary teeth, the most important one for scale removal, is already differentiated in juveniles at 1.9 SL. The scale-eating habit may have a primarily social origin through inter-specific aggression. Besides scales, it occasionally takes insects, tiny crustaceans and plant material (Ref. 28733).
Siklus hidup dan perilaku kawin
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fekunditas | Larva
Terán, G.E., M.F. Benitez and J.M. Mirande, 2020. Opening the Trojan house: phylogeny of Astyanax, two genera and resurrection of Psalidodon (Teleostei: Characidae). Zool. J. Lin. Soc. 190(4):1217-1234. (Ref. 123753)
Status IUCN Red List (Ref. 130435: Version 2025-2 (Global))
ancaman kepada manusia
Harmless
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimasi berdasarkan model
Indeks keanekaragaman filogenetik (Acuan 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01148 (0.00510 - 0.02587), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
Tingkat Trofik (Acuan 69278) |
3.2 ±0.49 se; based on food items. |
Daya lenting (Acuan 120179) |
Tinggi, Waktu penggandaan populasi minimum kurang dari 15 bulan (Preliminary K or Fecundity.). |
Kerentanan Penangkapan Ikan (Ref. 59153) |
Low vulnerability (22 of 100). 🛈 |