This species is endemic to northwestern Argentinean Patagonia. It is present in the provinces of Río Negro (in several localities within the Parque Nacional Nahuel Huapi, A. g. gargola), Neuquen (volcanic tablelands of Lonco Luan and surroundings A. g. neuquensis) and Chubut (Parque Nacional Los Alerces and Parque Nacional Lago Puelo). It has an altitudinal range of 200-2,200m asl.
Habitat and Ecology
This is a semi-aquatic species associated with both small alpine lakes and streams, and Patagonian forest streams. Breeding takes place in streams and ponds. The species may be found in areas slightly disturbed by cattle farming.
Adult frogs overwinter in both terrestrial and underwater conditions for ca 8 months per year (May to December) (Logares and Úbeda, 2006). The tadpole has a long development period (2-3 years) and overwinters in the water under a layer of ice and snow. They are locally abundant, and appear to be grazers of the periphytic community and detritus gatherers, with diet matching the tadpoles' morphological and structural adaptations to a lotic-benthic habitat (Baffico and Úbeda, 2006).
It is a common species.
The ongoing introduction of exotic predatory fish species (trout) into the stream habitats of this species is considered to be a major threat, although population declines have yet to be observed.
It is present in Parque Nacional Nahuel Huapi, Parque Nacional Los Alerces and Parque Nacional Lago Puelo.
Red List Status
Least Concern (LC)
Listed as Least Concern because, although its Extent of Occurrence is less than 20,000 km2, it is common where it occurs, and does not appear to be in decline even though trout have been introduced to parts of its range.
Ther are two subspecies: Alsodes gargola gargola Gallardo, 1970; and Alsodes gargola neuquensis Cei, 1976.
Esteban Lavilla, Carmen Úbeda, Néstor Basso, Boris Blotto 2010. Alsodes gargola. The IUCN Red List of Threatened Species 2010: e.T56314A11457267. http://dx.doi.org/10.2305/IUCN.UK.2010-2.RLTS.T56314A11457267.en .Downloaded on 20 February 2019