Guanaco abundance and monitoring in Southern Patagonia: distance sampling reveals substantially greater numbers than previously reported

Travaini, Alejandro; Zapata, Sonia C.; Bustamante, Javier; Pedrana, Julieta; Zanón, Juan I.; Rodrı́guez, Alejandro

doi:10.1186/s40555-014-0097-0

Cited by 29 publications

(24 citation statements)

References 31 publications

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“…To compare our results with those reported for other areas of the guanaco distribution range, we considered studies with reported measures of error of up to 30%. Our densities are in accordance with reports for Argentinian Patagonia (ranging between 0.95–7.56 ind/km 2 ) [ 54 – 56 ] and for the Provincial Park Ischigualasto (0.12 ind/km 2 ) [ 57 ], although other studies reported larger figures (ranging 3.25–26 ind/km 2 ) respectively, for other protected areas [ 37 , 58 , 59 ]. Of special interest is the study on the Chilean sector of Tierra del Fuego that reports 30.5 ind/km 2 [ 60 ], a value one order of magnitude larger than ours.…”

Section: Discussionsupporting

confidence: 92%

Spatial abundance models and seasonal distribution for guanaco (Lama guanicoe) in central Tierra del Fuego, Argentina

et al. 2018

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Spatially explicit modelling allows to estimate population abundance and predict species’ distribution in relation to environmental factors. Abiotic factors are the main determinants of a herbivore´s response to environmental heterogeneity on large spatiotemporal scales. We assessed the influence of elevation, geographic location and distance to the coast on the seasonal abundance and distribution of guanaco (Lama guanicoe) in central Tierra del Fuego, by means of spatially explicit modelling. The estimated abundance was 23,690 individuals for the non-breeding season and 33,928 individuals for the breeding season. The factors influencing distribution and abundance revealed to be the elevation for the non-breeding season, and the distance to the coast and geographic location for the breeding season. The southwest of the study area presented seasonal abundance variation and the southeast and northeast presented high abundance during both seasons. The elevation would be the driving factor of guanaco distribution, as individuals move to lower areas during the non-breeding season and ascend to high areas during the breeding season. Our results confirm that part of the guanaco population performs seasonal migratory movements and that the main valleys present important wintering habitats for guanacos as well as up-hill zones during summer. This type of study would help to avoid problems of scale mismatch and achieve better results in management actions and is an example of how to assess important seasonal habitats from evaluations of abundance and distribution patterns.

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Section: Discussionsupporting

confidence: 92%

Spatial abundance models and seasonal distribution for guanaco (Lama guanicoe) in central Tierra del Fuego, Argentina

et al. 2018

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“…Departments were obtained from (SENASA, 2017a), sheep numbers from (SENASA, 2017c) and goat numbers from (SENASA, 2017b Vargas, 2013;Travaini et al, 2015. Two of these surveys covered four provinces excluding Tierra del Fuego, and two were carried out only in Santa Cruz provinces.…”

Section: Cattle Numbers Tabulated For Five Patagonian Provinces and 40mentioning

confidence: 99%

Remotely sensed primary productivity shows that domestic and native herbivores combined are overgrazing Patagonia

Oliva

Paredes

Ferrante

et al. 2019

Journal of Applied Ecology

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“…, Travaini et al . ), which represents an invaluable biological and cultural heritage in South America. This study supports the idea that the conservation of wide‐ranging species such as the Andean Condor requires a landscape approach.…”

Section: Discussionmentioning

confidence: 99%

Low‐frequency, threatened habitats drive the large‐scale distribution of Andean Condors in southern Patagonia

Pérez‐García¹,

Sánchez‐Zapata

Lambertucci

et al. 2017

Ibis

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The analysis of factors that determine the distribution of top-scavengers at large scales can provide clues to understanding important ecological processes and may be useful in establishing conservation and management strategies. Here, we conducted a large-scale survey to study the distribution of the threatened Andean Condor Vultur gryphus in relation to environmental factors in southern Patagonia. This area has undergone the settlement of livestock and the introduction of exotic wildlife, although to a lesser extent than in the distribution of Condors in northern Patagonia. The aim of this study was to determine the relevance of different factors such as the availability of food resources, the availability of suitable nesting and roosting places and the presence of humans on largescale condor distribution. Our results show that the presence of meadows was the primary factor shaping Andean Condor distribution, despite the fact that this habitat occupies only 4% of the Patagonian landscapes. However, this habitat has a high probability of herbivore presence, so Condors seem to optimize their searching. The availability of nesting and roosting cliffs also contributed to explaining the observed distributions. Our results suggest that Condor distribution in southern Patagonia is a compromise between the spatial locations of two low-frequency habitatsmeadows and cliffs. A successful Condor conservation strategy in southern Patagonia should include the protection of these habitats and the regulation of farming expansion, including the recovery of meadows.

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Guanaco abundance and monitoring in Southern Patagonia: distance sampling reveals substantially greater numbers than previously reported

Cited by 29 publications

References 31 publications

Spatial abundance models and seasonal distribution for guanaco (Lama guanicoe) in central Tierra del Fuego, Argentina

Spatial abundance models and seasonal distribution for guanaco (Lama guanicoe) in central Tierra del Fuego, Argentina

Remotely sensed primary productivity shows that domestic and native herbivores combined are overgrazing Patagonia

Low‐frequency, threatened habitats drive the large‐scale distribution of Andean Condors in southern Patagonia

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