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Teleostei (teleosts) > Cyprinodontiformes (Rivulines, killifishes and live bearers) > Rivulidae (Rivulines) > Rivulinae
Etymology: staecki: Named for Wolfgang Staeck (Berlin, Germany), former president of the Deutsche Cichliden-Gesellschaft and collector of the type specimens, to acknowledge his commitment to South American freshwater fishes and his contributions to the taxonomy of the fish families Rivulidae and Cichlidae..

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic; pH range: 4.4 - ?. Tropical; 25°C - ? (Ref. 87326)

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South America: known only from the type locality, a pond in Rio Negro basin, Amazonas, Venezuela.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 2.9 cm SL male/unsexed; (Ref. 87326)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 8 - 9; Anal soft rays: 13 - 14; Vertebrae: 31. Belongs to the subgenus Owiyeye and differs from other congeners, except Rivulus altivelis, Rivulus nicoi, Rivulus tecminae and Rivulus uakti, by possessing long pelvic fins (pelvic-fin length up to about 25 % of SL, reaching the middle of anal-fin base in males vs. short pelvic fin, reaching anterior portion of anal-fi n base). Can be separated from other species of the subgenus (except for Rivulus amanapira, Rivulus rectocaudatus and Rivulus tecminae) by truncate caudal fin in males (vs. round, subtruncate, spatula- or lyre-shaped caudal fin). Its 35-38 scales in the longitudinal series separate this species from other species (vs. 41-44 in Rivulus altivelis, 48-49 in Rivulus amanapira and 38-43 in Rivulus rectocaudatus and Rivulus tecminae, 26-29 in Rivulus nicoi and 32-33 in Rivulus uakti) (Ref. 87326).

Found in a pond with clear, light brownish color and very acidic water (Ref. 87326).

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Main reference Upload your references | References | Coordinator : Costa, Wilson J.E.M. | Collaborators

Schindler, I. and S. Valdesalici, 2011. Rivulus staecki, a new killifish (Teleostei: Cyprinodontiformes: Rivulidae) from the upper Rio Negro drainage in southern Venezuela. Vertebr. Zool. 61(1):109-114. (Ref. 87326)

IUCN Red List Status (Ref. 130435)

Data deficient (DD) ; Date assessed: 08 June 2017

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00661 (0.00311 - 0.01404), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.2 ±0.4 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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