Apistogramma uaupesi Breeding Guide
Breeding Apistogramma uaupesi: cave spawning, female-tended eggs and larvae, very soft acidic Rio Negro blackwater conditions.
Overview
Apistogramma uaupesi is a dwarf cichlid from the Uaupes River and nearby Negro River basin in Brazil. FishBase records males to 2.8 cm SL and a very acidic natural pH of 4.0-5.0. It is a cave spawner with female brood care. Where species data is limited, the guide draws on the documented breeding pattern of the genus Apistogramma.
Sexing
Specific dimorphism for A. uaupesi is not detailed in available scientific sources. For the genus, males are generally larger with more extended, pointed unpaired fins and stronger colour, while females are smaller and rounder; this is documented for the genus rather than confirmed for this species.
Conditioning
The species is a small carnivore best conditioned on small live and frozen invertebrate foods. As a Rio Negro fish it occupies very soft, acidic, warm blackwater, and conditioning should reproduce those conditions.
Breeding Setup
- Temperature: 23-29 °C (FishBase)
- pH: 4.0-5.0 (FishBase) — very acidic blackwater
- Water: very soft, tannin-stained Rio Negro-type water
- Spawning sites: enclosed caves; eggs attached to the cave ceiling
- Layout: sand substrate with small caves (genus pattern)
Spawning Behavior & Trigger
FishBase states that eggs are attached to the ceiling of caves and that the female cares for eggs and larvae. For the genus, nearly all Apistogramma spawn in crevices or small caves and most use a polygamous harem strategy in which the male defends a territory containing several females. Very soft, acidic, warm water reproducing the natural blackwater habitat is important to trigger and sustain spawning.
Egg & Fry Care
The female tends the clutch in the cave and guards larvae and free-swimming fry, while the male defends the territory, as documented for the genus. For Apistogramma generally, warmer and more acidic water tends to skew the sex ratio toward males; this is documented for the genus, with species-specific data for A. uaupesi limited.
Common Challenges
Achieving and stably holding very low pH and very soft water is the principal challenge, and eggs may fail to develop in harder, less acidic water. IUCN lists the species as Least Concern (assessed 2020).