Guianacara dacrya

Guianacara dacrya Arbour & López-Fernández, 2011

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> Cichliformes (Cichlids, convict blennies) > Cichlidae (Cichlids) > Geophaginae
Etymology: Guianacara: Composed from Guyana + Tupí, guaraní, acará = the name of a fish (Ref. 45335); dacrya: Name from Greek 'dakryo', to shed tears or weep; referring to the tear-streaked appearance of the infraorbital stripe; an adjective in feminine form.

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water pelagisch. Tropical

Verspreiding Gebieden | FAO regio's | Ecosystemen | Voorkomen | Verspreidingskaart | Introducties | Faunafri

South America: Guyana.

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 12.0 cm SL mannelijk / geslacht onbekend; (Ref. 86674)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

This species (belonging to the subgenus Guianacara) can be distinguished from G. oelemariensis (subgenus Oelemaria) by the possession of 2 supraneural bones, produced dorsal-fin lappets and a midlateral bar. It is distinguished from all other species in the subgenus Guianacara by the possession of an infraorbital stripe that progressively fades across the cheek (from just beneath the eye to the dorsal edge of the pre-opercle) in individuals which are more than 45 mm SL, but remains black or dark brown across the preopercle and interopercle (vs. infraorbital stripe continuous throughout ontogeny); posterior half of the lower pharyngeal jaw toothplate with a dorsally edentulous laminar expansion of the lateral margin (vs. absent in other species of Guianacara). G. dacrya can by further distinguished from G. stergiosi, G. sphenozona, G. owroewefi and G. geayi by the possession of a thin midlateral bar which covers three scales at its widest point, thinning to 1.5 to 2 scales (vs. never less than 3 scales); from G. geayi and G. sphenozona, by the retention of the juvenile dark coloration of the 3 anterior dorsal-fin spines and lappets in adults (vs. lost); from G. owroewefi and G. sphenozona by the possession of white spots on both the soft and spiny portions of the dorsal-fin; from G. stergiosi and G. cuyunii by a larger eye, a shorter and narrower head, shorter pectoral fin and by produced filaments of the anal, dorsal and (occasionally) caudal fins; from adult G. cuyunii by a distinct midlateral spot, the possession of dusky branchiostegal membranes and a shallower body; from adult G. stergiosi by a shorter preorbital region and longer pelvic fins. In G. dacrya, when a midlateral spot is distinguishable, it is small, round and placed on and below the upper lateral line, similar to G. stergiosi (vs. large and oval shaped (G. owroewefi) or placed on and above the upper lateral line (G. sphenozona) (Ref. 86674).

Biologie     Verklarende woordenlijst (bv. epibenthic)

This species is usually found associated with clear water streams with moderate current; also in seasonally flooded lagoons with no current in the Rupununi savannas. The substrate is usually sandy with nearby large rocks; large numbers of juveniles were observed in river sections formed by mixtures of pebbles and small rocks over sandy bottom, frequently with some leaf litter. Water parameters where it was collected showed a temperature range of 24.8-28.5ºC, with relatively high dissolved oxygen levels (5.3-6.56 mg/L) and very low conductivity (27.1-34.5µS) at localities in the Rupununi and Pirara (Ireng) drainages (Ref. 86674).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Hoofdreferentie Upload uw referenties | Referenties | Coördinator : Kullander, Sven O. | Medewerkers

Arbour, J.H. and H. López-Fernández, 2011. Guianacara dacrya, a new species from the rio Branco and Essequibo River drainages of the Guiana Shield (Perciformes: Cichlidae). Neotrop. Ichthyol. 9(1):87-96. (Ref. 86674)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Niet bedreigd (LC) ; Date assessed: 18 November 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex
(Ref. 82804) 		PD50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.02344 (0.01123 - 0.04892), b=3.01 (2.83 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau
(Ref. 69278) 		3.3   ±0.5 se; based on size and trophs of closest relatives
Weerstandsvermogen
(Ref. 120179) 		Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Kwetsbaarheid van de visserij
(Ref. 59153) 		Low vulnerability (16 of 100). 🛈