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SFS Annual Meeting

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EFFECT OF ELEVATION IN ASSEMBLAGE FISH IN HIGH MOUNTAIN STREAMS, COLOMBIA

The high mountain ecosystems have a low diversity of genus and a high endemism of the species. The streams andean in Colombia present the non-native specie like Oncorhynchus mykiss and the native species like Astroblepus. The objective of this study was to assess the diversity in Andean streams with introduced species and native species to different altitudes. The database of fish collections made by the GIZ in the Tolima department was used, this data covers 13 years (2003 to 2016). All the specimens are deposited in the Zoological Collection of the Universidad del Tolima (CZUT-IC). Three altitudinal ranges to assess diversity were established, the first (GI) between 1750-2000 m asl, the second (GII) between 2001-3000 m asl, and the third (GIII) elevations above 3000 m asl. For this the Hill numbers were used (q = 0, q = 1, q = 2), and the difference between the groups was analyzed by means of an NMDs and ANOSIM (p <0.05). Our results indicate that elevation plays an important role in fish assemblies at different heights, when the elevation increases a decrease of diversity occurs, and O. mykiis predominates in GIII.

Adriana Marcela Forero C├ęspedes (Primary Presenter/Author), University of Tolima, adrianam@ut.edu.co;


Francisco Antonio Villa Navarro (Co-Presenter/Co-Author), University of Tolima, favilla@ut.edu.co;