Classification / Names
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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: xiphidius: The name xiphidus meaning sword in Latin was given because of the characteristic longitudinal black band which decorates the sides, the snout up to the caudal peduncle in the female and the caudal fin in the male (Ref. 27188).
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; acqua dolce benthopelagico; pH range: 6.0 - 6.5; dH range: 6 - ?; non migratori. Tropical; 22°C - 25°C (Ref. 2060)
South America: Oyapock River basin and adjacent coastal drainages.
Size / Peso / Age
Maturity: Lm ?  range ? - ? cm
Max length : 4.5 cm TL maschio/sesso non determinato; (Ref. 35237); 3.0 cm TL (female); common length : 4.0 cm TL maschio/sesso non determinato; (Ref. 27139); Età massima riportata: 3.00 anni (Ref. 35237)
Especially found in very shallow parts of small brooks where water is brown and rich in tannin and the substrate consists of decaying vegetation (Ref. 35237). Stays in the shaded areas of small, slow flowing rivers, sympatric with R. geayi, R. agilae, R. lungi, and R. cladophorus. Sexual differentiation is possible at 4 months of age (Ref. 27188). Not a seasonal killifish (Ref. 27139). Reproduction is not so prolific; is considered difficult to maintain in the aquarium. Sexual differentiation is possible at 3 months but reproduction occurs for the first time at around one year (Ref. 35237). If pursued by a predator this species may jump on land where it rests for a few seconds before re-entering the water (Ref. 35237).
Life cycle and mating behavior
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
Eggs measure 1.6 mm diameter. Sexes can be distinguished at about 3 months of age. Dominant males are followed by 1-3 females.
Costa, W.J.E.M., 2003. Rivulidae (South American Annual Fishes). p. 526-548. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36579)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Pesca: di nessun interesse
Informazioni ulteriori
Age/Size
Accrescimento
Length-weight
Length-length
Length-frequencies
Morfometria
Morfologia
Larve
Dinamica popolazioni larvali
Reclutamento
Abbondanza
BRUVS
BibliografiaAcquacolturaProfilo di acquacolturaVarietàGeneticaElectrophoresesEreditarietàMalattieElaborazioneNutrientsMass conversion
CollaboratoriImmaginiStamps, Coins Misc.SuoniCiguateraVelocitàModalità di nuotoArea branchialeOtolithsCervelliVista
Strumenti
Special reports
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Fonti Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 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 ±0.40 se; based on food items.
Resilienza (Ref.
120179): Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (tm=1; tmax=3).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).