Classification / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stethaprioninae
Etymology: Deuterodon: Greek, deuter = second + Greek, odous = teeth (Ref. 45335).
More on author: Eigenmann.
Issue
See Géry, 1977:579 for comments and Bizerril, 1994:65 for key.
Environment: milieu / climate zone / depth range / distribution range
पारिस्थितिकी
; स्वच्छ जल, अलवण जल बेनथोपिलाजिक. Tropical
South America: coastal basins of southeastern Brazil.
आकार / वज़न / Age
Maturity: Lm ? range ? - ? cm
Max length : 8.1 cm SL पुल्लिंग / अलिंग; (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).
Life cycle and mating behavior
Maturities | पुनरुत्पत्ति | Spawnings | Egg(s) | Fecundities | लार्वा
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
साधन
Special reports
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इंटरनेट स्रोत
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01202 (0.00548 - 0.02637), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.2 ±0.49 se; based on food items.
लौटाव (Ref.
120179): ऊंचा, न्यूनतम जनसंख्या दुगनी समय अवलागत 15 महीने। (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
