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Río de Coacuilco, Hidalgo, Mexico

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Mexico, Hidalgo, Coacuilco

Coacuilco its an small town in the state of Hidalgo in México, next to the village there is a river with medium to fast flowing stream depending on the season, the river its often visited by tourist and swimmers.

There is a lack of vegetation in the water, in some months mainly on the dry season you can see some algae attach to the rocks, because of the poor circulation and acumulation of debris. The bottom of the river its conformed by silical sand and rounded rocks and pebbles very calcaric. The river its sorrounded by some terrestrial vegetation such as tress like Ulmus sp., Adiantum tenerum, Sphagneticola tribulata, among others.

Submitted by
Marco Arroyo
Approved by
Juan Miguel Artigas Azas & Jairo Arroyave
GPS
21.1084156, -98.5643234
Geographical region
Central America
Drainage Basin
Río Pánuco
River catchment
Río Coacuilco
Water body type
River
Water body name
Río Coacuilco
Water body part
Rapids
Water body course
Headwaters
Water body: tributary of
River
Tributary name
Río Pánuco

Videos above and below water

Water Chemistry

Water information

Water type
Fresh water
Water color
Clear water
Water transparency
High
Concentration of sediments
Low
Water temperature
22 °C
Water flow/curent
Strong

Chemical parameters

pH
7.2
Conductivity
GH
KH
Dissolved Oxygen

Substrate in nature

Sand
Beige
Pebble/Gravel
Grey
Stone
Grey
Stone form
Roundish
Silt/Mud
Leaves
Few
Driftwood
Submerged terrestrial vegetation
No

Aquatic Biotope

Date of collecting
21.03.2019
Collecting area
Open water
Water depth
0,5m
Air temperature
26 °C
Sunlight
Full sun

Environment

Environment
Affected by human activity
Affected by human activity
Deforestation
Deforestation
Advanced
Surrounding area

The surrounding areas are mainly integrated with rounded rocks and some trees called Olmos (Ulmus sp.), in some of the banks of the river you can find Adiantum tenerum wich they love humidty, and Sphagneticula trilobata among others.

Underwater landscape

The underwater landscape its composed of silical sand and big rounded rocks, theres a lack of any type of vegetation, just in the dry season you can see some algae attach to the rocks.

Fishes:

  • Astyanax mexicanus
  • Nosferatu pantostictus
  • Poecilia mexicana
  • Gambusia regani
  • Xiphophorus birchmanni

 

Threats to ecology

Theres agricultural activity and the use of pesticides eventually affect the water body, but also some of the sewer of the houses in the town ends in the river.

Riparian zone

Trees near the aquatic habitat
- Ulmus sp.
Trees near the aquatic habitat
- Adiantum tenerum
Trees near the aquatic habitat
- Equisetum sp.
Trees near the aquatic habitat
- Sphagneticola trilobata

Bibliography

  • Freshwater Fishes of Mexico, 2005 by Robert Rush Miller
    ISBN 0-226-52604-6
  • Los Peces Dulceacuicolas Mexicanos, 1993 by Héctor Espinosa Pérez, Ma. Teresa Gaspar Dillanes
  • Revision des Xiphophorus montezumae/cortezi Komplexes and Nebeschreibung einer supspezies, 1993 by Lechner y Radda

Sitography

→ mexfish.info; Juan Miguel Artigas Azas: Xiphophorus birchamanni

Comment by the expert

Juan Miguel Artigas Azas: The aquarium is appealing and as close to nature as it could be. One valuable aspect in contrast to other aquariums I have examined in this contest is that the choosing of a species only aquarium for an endangered species is valuable, and likely to be maintained long term.

Jairo Arroyave: Media is OK, shows the underwater habitat with enough detail, although the video could have had better quality overall. Regardless, it documents the habitat well enough. Bibliography and sitography also appear sufficient, although it could have been more extensive. The descritpion of the environment is thorough, except for a few missing entires for water chemistry.