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ISRA FACTSHEETS

SOUTH AMERICAN INLAND WATERS

ISRA FACTSHEETS

SOUTH AMERICAN INLAND WATERS

Betania ISRA

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Betania ISRA

Betania

Summary

Betania is located in the upper Magdalena River basin, in the Huila department, in central-southern Colombia. The area is a reservoir situated at the mouth of the Yaguará River and the beginning of the Magdalena River. The habitat is characterised by sandy and rocky substrates with leaf litter. Within this area there are: range-restricted species (Magdalena Freshwater Stingray Potamotrygon magdalenae).

Betania

Betania

DESCRIPTION OF HABITAT

Betania is located in the upper Magdalena River basin, in the Huila department, in south-central Colombia, within the major Orinoco basin. The area is a reservoir situated at the mouth of the Yaguará River and the beginning of the Magdalena River. The reservoir is spread across 74 km2 and has a maximum depth of 90 m. It was filled between November 1986 and June 1987 (Martinez-Silva 2015). Sandy and muddy substrates dominate (35%) the upper Magdalena River, followed by rocky leaf litter (23%) (Mejia-Falla et al. 2013).

This Important Shark and Ray Area is benthic and is delineated from surface waters (0 m) to 59 m based on the depth range of Qualifying Species globally.

CRITERION B

RANGE RESTRICTED

This area holds the regular presence of the Magdalena Freshwater Stingray as a resident range-restricted species. This species occurs year-round in the area and is regularly encountered (Mejia-Falla et al. 2013, 2016). According to 150 fishers interviewed at 24 locations along the Magdalena River between 2010–2013, animals are frequently captured in local fisheries as incidental catch and for local consumption (Mejia-Falla et al. 2013, 2016).

Between 2010–2013, 237 fishing sets were examined along the Magdalena River to estimate the number of rays captured in each (Mejia-Falla et al. 2013, 2016). In the upper Magdalena River, the most used fishing gear to catch this species was the trammel net. The average number of rays captured per fishing set was 2.7, with a maximum capture of seven rays in one set. This represented the highest values compared to the lower and mid Magdalena River (Mejia-Falla et al. 2013). Similarly, compared to the lower and mid Magdalena River, this species is reportedly mostly captured for consumption in the upper basin section, where this area is located (Mejia-Falla et al. 2013, 2016).

Magdalena Freshwater Stingray is endemic to Colombia where it is restricted to three basins: Magdalena-Cauca basin (including the Magdalena, Cauca, San Jorge rivers), Atrato basin (composed of the Atrato River), and Sinú basin (composed of the Sinú River) (Mejia-Falla et al. 2024). This species is found in rivers, swamps, wetlands, and dams along these basins (Mejia-Falla et al. 2024).

Arvoredo Island

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