Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Characiformes (Characins) >
Serrasalmidae (Piranhas and pacus) > Myleinae
Etymology: Myloplus: Greek, mylos, -ou = grey mullet + Greek, plus, ploos = movement of a serpent; nigrolineatus: Name from Latin 'nigro' for black, and 'lineatus' for lined, referring to the black, pigmented lateral line; an adjective..
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
South America: Brazil.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 23.8 cm SL male/unsexed; (Ref. 123127)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 25 - 29; Anal soft rays: 33 - 38. This species is distinguished from its congeners by the following characters: highly concentrated dark chromatophores on the lateral-line scales, resulting in a markedly, dark pigmentation along the lateral line; it differs from arnoldi, lobatus, lucienae, planquettei, rhomboidalis, schomburgkii, zorroi by having 25-29 branched dorsal-fin rays (vs. 18-24); from ternetzi by the presence of a symphyseal pair of conical teeth posterior to the main row of dentary (vs. absence); from asterias, levis, rubripinnis, taphorni, tiete, torquatus, tumukumak by having 89-114 lateral line scales from supracleithrum to end of hypural plate (vs. 56-89) and 98-120 total perforated lateral line scales (vs. 59-97) (Ref. 123127).
This species was reported to inhabit slow-flowing habitats such as backwaters and lake, feedng mainly on aquatic and terrestrial plants. Collection localities include clearwater rivers chemically characterized by a low concentration of suspended sediments, dissolved minerals and humic compounds and also from extremely acidic oligotrophic blackwaters. The type locality is also a blackwater system that has its headwaters in the Purus-Madeira interfluvium and like other blackwater rivers, is of low sediment load and low pH. These blackwater environments are reported to be inhospitable to certain species of fish (Ref. 123127).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae
Ota, R.P., V.N. Machado, M.C. Andrade, R.A. Collins, I.P. Farias and T. Hrbek, 2020. Integrative taxonomy reveals a new species of pacu (Characiformes: Serrasalmidae: Myloplus) from the Brazilian Amazon. Neotropical Ichthyology 18(1):e190112. (Ref. 123127)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02570 (0.01204 - 0.05486), b=2.97 (2.80 - 3.14), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (19 of 100).
