Nematolebias whitei (Myers, 1942)

Rio pearlfish

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Actinopterygii \| Cyprinodontiformes \| Rivulidae
Synonyms	Cynolebias whitei, Pterolebias elegans, Cynolebias elegans, ... more
Common names	... more

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Image of Nematolebias whitei (Rio pearlfish)

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Main reference

Costa, W.J.E.M. 2002. (Ref. 42934)
Other references | Biblio | Coordinator : Costa, Wilson J.E.M. | Collaborators

Size / Weight / Age

Max length : 8.0 cm TL male/unsexed; (Ref. 36579)

Length at first maturity

Environment

Benthopelagic; non-migratory; freshwater; pH range: 6.5 - 7.0; dH range: 5 - 8

Climate / Range

Tropical; 20°C - 23°C (Ref. 1672)

South America: Laguna de Araruama basin, Das Ostras River basin, coastal plains adjacent to the mouth of São João River in Brazil.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 13 - 19; Anal spines: 0; Anal soft rays: 18 - 24; Vertebrae: 29 - 31. Having series of small bluish white spots, often coalesced to form continuous or fragmented line, on subdistal area of caudal fin and dark brown to black stripe on border of anal fin, adjacent and parallel to perpendicular extensions of subdistal golden transverse lines. Dorsal head profile slightly convex to nearly straight in male, gently concave to approximately straight in female (Ref. 42934).

Occurs in small freshwater temporary pools in floodplains of streams and lagoons. These pools are shallow with compact, soft reddish brown muddy bottom and dry twice a year, during winter, usually from July to August, and during summer, usually from February to March. During dry season, all fish die and eggs undergo in diapause within the substrate. Eclosion happens at the onset of wet season, usually March-April and September-October (Ref. 42934). This species was introduced in California (Ref. 4357). Bottom spawner, 4 months incubation. Is easy to maintain in the aquarium (Ref. 27139).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Harmless

Human uses
Aquarium: commercial


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment Abundance	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

Tools
Biogeographic modelling \| E-book \| Field guide \| Length-frequency wizard \| Life-history tool \| Point map

Special reports
Check for Aquarium maintenance \| Check for Species Fact Sheets \| Check for Aquaculture Fact Sheets

Download XML
Summary page \| Point data \| Common names \| Photos

Internet sources

Estimation of some characteristics with mathematical models

Phylogenetic diversity index (Ref. 82805)

PD₅₀ = 0.7500

Resilience (Ref. 69278)

High, minimum population doubling time less than 15 months (tm=0.1)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low vulnerability (10 of 100)	Not marketed/unknown

Entered by Capuli, Estelita Emily

Modified by Torres, Armi G.

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