Rayen Estrada Pacheco’s scientific contributions

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Publications (5)


Figure 1. Photograph of a juvenile Andean condor during liberation. Graph showing the number of condors cared by the PCCA.
Figure 2. Photographie d'un individu juvénile de condor des Andes lors de la libération. Graphique du nombre de condors pris en charge par le PCCA.
Monitoring and population study of the Andean Condor during a reintroduction program
  • Conference Paper
  • Full-text available

May 2024

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3 Reads

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Rayen Estrada Pacheco

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N. Luis Jacome

Presentation of a reintroduction programm in the Argentinian Patagonia for Adean condor (Vultur gryphus). The project, called "El Retorno del Condor al Mar" (The Return of the Condor to the Sea) is a program run by the "Plan Integral para la Conservacion del Condor Andino".

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Mass poisonings of the Vulnerable Andean condor prompt national strategy against the use of toxic baits in Argentina

July 2022

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41 Reads

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3 Citations

Ethnobiology and Conservation

Massive deaths of Andean condors (Vultur gryphus) prompted a National Strategy Against the Use of Toxic Baits in Argentina, based on 6 lines of action: 1) delivery of kits and unified intervention protocols in cases of wildlife poisoning, 2) community education programs, 3) surveys of rural people, 4) training courses and participatory construction workshops, 5) toxicology studies, and 6) an academic-scientific committee made up of specialists in toxicology. The strategy was developed in the 14 provinces of the country where the Andean condor is distributed. 554 people from 166 institutions have participated in the trainings and workshops, reporting 200 poisoning events involving more than 21000 individuals from 61 species. Birds and mammals were the groups most affected, and further, human victims show the impact on public health. 19 toxic substances were identified, mainly insecticides. This study proved that carbofuran is the toxic most used. Analysis of bait types suggests a significant conflict with carnivores. 195 surveys revealed that almost half of the farmers know people who use toxic baits and that the negative perception towards some species could determine their use. The strategy began to address the problem of the use of toxic baits in Argentina in a strategic, participatory and regional way, through the management of public policies and scientific research. We propose actions to work on the causes that lead to the application of this dangerous practice. Given its extensive use, we believe that this strategy can be adapted and applied in other countries in the region.




Pesticides: The most threat to the conservation of the Andean condor (Vultur gryphus)

January 2020

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334 Reads

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23 Citations

Biological Conservation

Highlights • Pesticide poisoning is currently the greatest threat to the Andean condor. • Poisonings affect adult condors more than immature ones. • The most commonly used poison is Carbofuran, and to a lesser extent Palation. • Condor poisonings have reached alarming levels that could lead to extinction.

Citations (3)


... In some instances, such as the recent Andean condor poisoning by pesticides in Argentina and Bolivia, mortality events have instead been reported in 'grey' literature, rather than more widely in international peer-reviewed journals (Alarcón and Lambertucci, 2018;Praeli, 2021), possibly reflecting a lack of resources. In other instances, single articles may report a high number of mortalities from a range of separate incidences (Scollon et al., 2000;Jácome et al., 2022). Furthermore, delays in publication may lead to failures to respond quickly to unfolding poisoning risksthe average of 3.8 years across observational non-retrospective studies is considerably longer than the average of approximately 2.8 years found in 127 global bird conservation studies by Christie et al. (2021). ...

Reference:

Pesticides and veterinary pharmaceuticals in neotropical avian carnivores: A scoping review
Mass poisonings of the Vulnerable Andean condor prompt national strategy against the use of toxic baits in Argentina

Ethnobiology and Conservation

... In Argentina, the Andean condor is threatened (MAyDS and AA 2017) and currently its main conservation problem is the use of toxic baits used as a livestock practice (Estrada Pacheco et al. 2020a). In recent years, massive deaths of this species have been recorded in the country due to the consumption of poisoned baits used by ranchers, mainly to kill cougars (Puma concolor ), foxes (Lycalopex sp.) and dogs (Canis familiaris) (Estrada Pacheco et al. 2020b). ...

Response to: “Acknowledging Andean Condor predation on livestock, a first step in addressing the human-condor conflict: A commentary to Estrada Pacheco et al 2020”
  • Citing Article
  • July 2020

Biological Conservation

... In Andean condors, the association with nearly exclusive terrestrial carrion is related to risk of exposure to pesticides used in cattle ranching to control predators (Estrada Pacheco et al., 2020) or lead poisoning associated to hunting (Lambertucci et al., 2011). In that context, the association with a broader array of food sources may enhance condor resilience in a changing world. ...

Pesticides: The most threat to the conservation of the Andean condor (Vultur gryphus)
  • Citing Article
  • January 2020

Biological Conservation