Brycon posadae 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Characiformes Bryconidae

Scientific Name: Brycon posadae Fowler, 1945
Taxonomic Notes: Transandean Brycon species need a taxonomical revision. Also, much of the Colombian Pacific versant (mountain slope) is inaccessible for Colombian ichthyologists, so little is known about the fish fauna inhabiting the area.

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2016
Date Assessed: 2014-10-07
Assessor(s): Arguello, P. & Jimenez-Prado, P.
Reviewer(s): Cox, N.A.
Facilitator/Compiler(s): Abba, A.M.

This species has a relatively small range (EOO = 13,900 km2). At its southern limit, the population seems to be relatively stable. However, it is affected by anthropogenic activities (deforestation, dams) in part of their range. However, due to the lack of records, it is not possible to estimate number of locations or whether the population is severely fragmented.The species is classified as Near Threatened, as it qualifies for criterion B1b(iii).

Previously published Red List assessments:

Geographic Range [top]

Range Description:This species occurs in the Trans-Andean river basins of Ecuador and Colombia. It occurs in the Santiago-Cayapas basin of northwestern Ecuador (Barriga 2012), and in the Mira River basin in Colombia (Maldonado-Ocampo et al. 2012). The type locality is in the Guebo River, in the Nariño department of Colombia at around 900 m of elevation. It may also be present in southern Ecuador in the rivers Cañar and Jubones (Jiménez-Prado et al. 2015). The species is very poorly known. Lack of records reflects lack of collection and difficulties in collecting rather than rarity. This species occurs between 300 to 900 m asl. The extent of occurrence is 13,900 km2 (calculated as the minimum convex polygon around the known sub-catchment/s where the species occurs), but if the records from the southern basins in Ecuador are confirmed, the extent of occurrence should be larger. The lack of distribution records prevent from estimating number of locations or whether the population is severely fragmented.

Countries occurrence:
Colombia; Ecuador
Additional data:
Lower elevation limit (metres):300
Upper elevation limit (metres):900
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No population information known.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Brycon posadae is a benthopelagic (ecological region at the lowest level of water body) species. It is an omnivorous fish, the plant material is an important part of the diet of adult Brycon species. These fish play a role in the dispersal of plants whose fruits they eat (Berra 2001).

Use and Trade [top]

Use and Trade: This species does not appear to be harvested.

Threats [top]

Major Threat(s): Due to their dependence on plant material in their diet, the destruction of rainforests surrounding their habitat, could have serious consequences for this species, and probably causing a decline in the quality of the habitat. The areas that the species occurs is affected by habitat fragmentation caused by dams.

Conservation Actions [top]

Conservation Actions: There are no conservation measures in place and research into general biology and ecology (habitat status and population trends) are required. It is not known if the species is present in any protected areas.

Citation: Arguello, P. & Jimenez-Prado, P. 2016. Brycon posadae. The IUCN Red List of Threatened Species 2016: e.T167690A53820427. . Downloaded on 16 October 2018.
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