Ancistrus tolima has a very restricted range
(extent of EOO = 160 km²). It lives in a single
creek of about 10 km² that is isolated by a dam.
The species is genetically isolated. There is subsistence
agriculture in the area, and run-off of agrochemicals
is affecting habitat quality. The creek is a dry area
that is affected by sudden temperature changes and
thus highly sensitive to climate change. For instance,
during El Niño event, water quantity in the
creek can be reduced to 20% of normal levels. Hence,
the species is listed as Endangered. The creek in
which this species lives flows into another creek,
which in turn flows into a dam that was built in 1971
(the species was discovered in 2005 but only described
in 2013). In other words, the species is genetically
isolated and restricted to an area of about 10 km²
because there is no connection with the main river
(Magdalena). There is subsistence agriculture in the
area of the creek; the run-off of agrochemicals affects
habitat quality. The area is the northernmost limit
of the tropical dry forest on the western slope of
the eastern Cordillera; it is a dry area that is affected
by sudden temperature changes and thus highly sensitive
to climate change. For instance, during El Niño
events water quantity in the creek can be reduced
to 20% of normal levels. (IUCN Red List). It has been
found in a creek with sand and gravel substrate, abundant
organic material, and steep banks with little shoreline
vegetation (Taphorn et al. 2013). Description:
Typical Ancistrus shape with both sexes sporting
bristles to the head area with the male having the
larger and more impressive tentacles. Aquarium
Care: Quite an easy species to keep as long
as there is adequate aeration in the aquarium and
giving them a choice of pipes, stones or rockwork.
Reproduction: As per the Ancistrus
family in neutral to mildly alkaline water. Will spawn
Upper Magdalena River drainage, subdrainage río
Prado in Colombia. Type Locality:
Quebrada El Pascado, 3.599306° N, -74.854556°
W, vereda San Pablo, municipio de Dolores, departamento
de Tolima, Colombia.
Froese, R. and D. Pauly.
Editors. 2018. FishBase. World Wide Web electronic
publication. www.fishbase.org, ( 06/2018 ). Taphorn, D.C., J.W.
Armbruster, F. Villa-Navarro and C.K. Ray,
2013. Trans-Andean Ancistrus (Siluriformes: Loricariidae).
Zootaxa 3641(4):343-370. Villa-Navarro, F., Mesa-Salazar, L., Lasso,
C. & Sanchez-Duarte, P. 2016. Ancistrus
tolima. The IUCN Red List of Threatened Species 2016.