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Shallow habitat, Río Nanay, Peru

Indonesia, Peru, Padre Cocha

In the shallow habitat of the Río Nanay it is common to find a small group of dwarf cichlid Biotodoma cupido, cardinal tetra and common hatchetfish. I was inspired to reproduce this habitat by combining several materials that I got from a fish shop. During the set-up of the biotope I was helped a lot by the documentaries of the Project Piaba.

Submitted by: Mohammad Arief Rachman Hakim
Approved by: Roberto E. Reis & Pablo C. Lehmann

GPS: -3.7032421, -73.2773361

Geographical region: Southeastern Asia
Drainage Basin: Rio Amazonas
River catchment: Río Nanay
Water body type: Wetland
Water body name: Shalow
Water body part: Channel
Water body course: Lower course
Water body: tributary of: Rio
Tributary name: Amazonas

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Water Chemistry

Water information

Water type: fresh-water
Water color: Black water
Water transparency: Medium
Concentration of sediments: Medium
Water temperature: 31 °C
Water flow/curent: Slow

Chemical parameters

pH: 6
Conductivity
GH
dGH
KH
dKH
Dissolved Oxygen

Substrate in nature

Sand: Orange
Pebble/Gravel: Mixed
Stone: Mixed
Stone form: Irregular
Silt/Mud: Orange
Leaves: Many
Driftwood: Many
Submerged terrestrial vegetation: Yes

Aquatic Biotope

Date of collecting: 07/02/2024
Collecting area: Flood plain/Várzea
Water depth: 0,5m
Air temperature: 31 °C
Sunlight: Partial shade

Environment

Environment

Untouched

Surrounding area

The Nanay River is a river in northern Peru. It is a tributary of the Amazon River, merging into this river at the city of Iquitos. The lower part of the Nanay flows to the north and west of the city, while the Itaya River flows to the south and east. Other nearby settlements on the Nanay River include the villages of Santo Tomás, Padre Cocha, and Santa Clara.

Captain Archibald Butt USN, ascended it 314km (195mi), to near its source. A part of the Nanay River flows through the Allpahuayo-Mishana National Reserve.

Underwater landscape

The Nanay is a blackwater river and it has a high fish species richness, including several that are well known from the aquarium industry. Some of these, notably Biotodoma cupido.

Threats to ecology

During periods when the river is low, the many beaches along the Nanay are popular destinations. The Nanay belongs entirely to the lowlands, and is very crooked, has a slow current and divides into many canos and strings of lagoons which flood the flat, low areas of country on either side. It is simply the drainage ditch of districts which are extensively overflowed in the rainy season.

Riparian zone

Trees near the aquatic habitat: Few -

Comment by the expert

Roberto E. Reis: Good description of the river basin, but not of the enviroment around the sampled area, but tree above the water photos. Threats only superficially described. Despite saying that the Nanay has a rich ichthyfauna, only mentioned one species. Under water aquatic habitat habitat very superfically described – one photo. No literature cited.

Pablo C. Lehmann: The information provided about the ecosystem of the Cautario River, a tributary of the Madeira River, is well structured and informative. The video effectively shows the ecological significance of the region, its rich biodiversity and visualizes the importance of expanding projects that involve local communities to protect local biodiversity and consequently the ichthyofauna of these biotopes. This information serves as a valuable resource for understanding and raising environmental awareness for the protection of the aquatic ecosystem in the region.