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Igarapé Prosperitate, Rio Preto, Brazil

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Brazil, Amazonas, Santa Isabel do Rio Negro

The igarapé Prosperitate is a tributary of the lower Rio Preto, a northern affluent of the Rio Negro, Brazil. The igarapé Prosperitate is a typical example of the countless small rain forest creeks of the Rio Negro region. The igarapé is located 12,5 km north-west off its junction with the Rio Negro.

Submitted by
Vern Van de Weyer
Approved by
Roberto Reis, Francesco Denitto & Donald C. Taphorn
GPS
-0.1630500, -64.1197205
Geographical region
South America
Drainage Basin
Rio Negro basin
River catchment
Rio Negro
Water body type
Igarapè
Water body name
Prosperitate
Water body part
River mouth
Water body course
Lower course
Water body: tributary of
Rio
Tributary name
Preto

Videos above and below water

Water Chemistry

Water information

Water type
Fresh water
Water color
Black water
Water transparency
Medium
Concentration of sediments
Low
Water temperature
22-24 in the shade and up to 29.5°c in the sunny parts °C
Water flow/curent
Slow

Chemical parameters

pH
5
Conductivity
70
GH
20 mg/l
KH
Dissolved Oxygen

Substrate in nature

Sand
Beige
Pebble/Gravel
None
Stone
None
Stone form
Silt/Mud
Brown
Leaves
Adundant
Driftwood
Many
Submerged terrestrial vegetation
no

Aquatic Biotope

Date of collecting
1994
Collecting area
Small bay
Water depth
1,0m
Air temperature
Sunlight
Full sun

Environment

Environment
Untouched
Surrounding area

The actual stream bed is flanked by broad belts of flood plains, and virtually the entire course is fully shaded by the surrounding vegetation, chiefly Ficus trees. Only the mouth, where during low water the final 30 meters of the forest stream broaden to form a lagoon some 5 meters in width, is exposed to sunlight. Upstream from its broad mouth, the creek splits into two branches. One falls dry during low water, only flowing during periods of normal or high water levels. The other branch maintains a width of 1.5 meters and a depth of 20 to 30 centimeters. The forest encompassing the igarapé Prosperitate consisted of various Ficus trees that measured about 8 meters in height. At the peak of the water height, they are submerged up to their crowns, up to about six meters.

Underwater landscape

During this period of low water the igarapé mouth measured a maximum depth of 1.2 meters, with no more than 40 cm of water above the layer of leaf litter. Temperatures reach a maximum of 29.5°C. Upstream the water temperature is approximately 24°C, because the complete stream is in shade. All sections of the stream have a substrate of leaf litter several decimeters thick. The upper third of the leaf litter is relatively loose and interspersed with a multitude of branches. The entire watercourse and adjacent areas were scattered with numerous tree stumps.

Fish:

Threats to ecology

No threats found.

Riparian zone

Trees near the aquatic habitat
Many - Ficus

Bibliography

  • Cichlid atlas volume 1 - Page168-175;122-123; 160; 652-656; 1068-1073 by Uwe Romer

Comment by the expert

Roberto Reis: Good description of BIN, but one photo, no videos.

Francesco Denitto: Not many infos nor infographic material were given about the BIN. Just few basic ones.

Donald C. Taphorn: This tank has some of my favorite aquarium fishes. You provided good links to more details, so well done on that account.