Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina

Sarcoptic mange epidemics can devastate wildlife populations. In 2014, mange was first detected in vicuñas (Vicugna vicugna) and guanacos (Lama guanicoe) in San Guillermo National Park (SGNP), Argentina. This study describes the temporal dynamics of the outbreak, its effects on the park's wild...

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Autores principales: del Valle Ferreyra, Hebe, Rudd, Jaime, Foley, Janet, Vanstreels, Ralph E.T., Martín, Ana María, Donadio, Emiliano, Uhart, Marcela M.
Formato: Artículo
Lenguaje:Español
Publicado: Public Library of Science 2022
Materias:
Q Ciencia (General)
QH301 Biología
QL Zoología
Acceso en línea:http://pa.bibdigital.ucc.edu.ar/3227/1/A_Martin_delValleFerreyra_Rudd.pdf
Aporte de:
Producción Académica Universidad Católica de Córdoba (UCCor) de Universidad Católica de Córdoba
id I38-R144-3227
record_format dspace
spelling I38-R144-32272025-04-09T21:25:35Z http://pa.bibdigital.ucc.edu.ar/3227/ Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina del Valle Ferreyra, Hebe Rudd, Jaime Foley, Janet Vanstreels, Ralph E.T. Martín, Ana María Donadio, Emiliano Uhart, Marcela M. Q Ciencia (General) QH301 Biología QL Zoología Sarcoptic mange epidemics can devastate wildlife populations. In 2014, mange was first detected in vicuñas (Vicugna vicugna) and guanacos (Lama guanicoe) in San Guillermo National Park (SGNP), Argentina. This study describes the temporal dynamics of the outbreak, its effects on the park's wild camelid populations between 2017-2019, and investigates the potential source of the epidemic. From May 2017 to June 2018, transect surveys indicated a sharp decrease in the density of living vicuñas and guanacos by 68% and 77%, respectively. By April 2019 no vicuñas or guanacos were recorded on transect surveys, suggesting their near-extinction in the park. Clinical signs consistent with mange (e.g., intense scratching, hyperkeratosis, alopecia) were observed in 24% of living vicuñas (n = 478) and 33% of living guanacos (n = 12) during surveys, as well as in 94% of vicuña carcasses (n = 124) and 85% of guanaco carcasses (n = 20) examined. Sarcoptes scabiei was identified as the causal agent by skin scrapings, and the cutaneous lesions were characterized by histopathology (n = 15). Genetic characterization revealed that mites recovered from seven vicuñas (n = 13) and three guanacos (n = 11) shared the same genotype, which is consistent with a single source and recent origin of the epidemic. Tracing the potential source, we identified a governmental livestock incentive program which introduced llamas (Lama glama) in areas adjacent to SGNP in 2009, some of which had alopecic scaling consistent with sarcoptic mange. Though at the time of our study no llamas with mange were available for confirmatory sampling, we hypothesize that the introduction of mange-infected llamas may have triggered the outbreak in wild camelids. This unprecedented event in SGNP had devastating effects on dominating herbivores with potentially profound cascading effects at the community and ecosystem levels. Public Library of Science 2022-01-21 info:eu-repo/semantics/article info:eu-repo/semantics/closedAccess application/pdf spa http://pa.bibdigital.ucc.edu.ar/3227/1/A_Martin_delValleFerreyra_Rudd.pdf del Valle Ferreyra, Hebe, Rudd, Jaime, Foley, Janet, Vanstreels, Ralph E.T., Martín, Ana María, Donadio, Emiliano ORCID: https://orcid.org/0000-0001-5257-4100 <https://orcid.org/0000-0001-5257-4100> and Uhart, Marcela M. (2022) Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina. PLoS ONE, 17 (1). ISSN 1932-6203 https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0256616 info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1371/journal.pone.0256616
institution Universidad Católica de Córdoba
institution_str I-38
repository_str R-144
collection Producción Académica Universidad Católica de Córdoba (UCCor)
language Español
orig_language_str_mv spa
topic Q Ciencia (General)
QH301 Biología
QL Zoología
spellingShingle Q Ciencia (General)
QH301 Biología
QL Zoología
del Valle Ferreyra, Hebe
Rudd, Jaime
Foley, Janet
Vanstreels, Ralph E.T.
Martín, Ana María
Donadio, Emiliano
Uhart, Marcela M.
Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina
topic_facet Q Ciencia (General)
QH301 Biología
QL Zoología
description Sarcoptic mange epidemics can devastate wildlife populations. In 2014, mange was first detected in vicuñas (Vicugna vicugna) and guanacos (Lama guanicoe) in San Guillermo National Park (SGNP), Argentina. This study describes the temporal dynamics of the outbreak, its effects on the park's wild camelid populations between 2017-2019, and investigates the potential source of the epidemic. From May 2017 to June 2018, transect surveys indicated a sharp decrease in the density of living vicuñas and guanacos by 68% and 77%, respectively. By April 2019 no vicuñas or guanacos were recorded on transect surveys, suggesting their near-extinction in the park. Clinical signs consistent with mange (e.g., intense scratching, hyperkeratosis, alopecia) were observed in 24% of living vicuñas (n = 478) and 33% of living guanacos (n = 12) during surveys, as well as in 94% of vicuña carcasses (n = 124) and 85% of guanaco carcasses (n = 20) examined. Sarcoptes scabiei was identified as the causal agent by skin scrapings, and the cutaneous lesions were characterized by histopathology (n = 15). Genetic characterization revealed that mites recovered from seven vicuñas (n = 13) and three guanacos (n = 11) shared the same genotype, which is consistent with a single source and recent origin of the epidemic. Tracing the potential source, we identified a governmental livestock incentive program which introduced llamas (Lama glama) in areas adjacent to SGNP in 2009, some of which had alopecic scaling consistent with sarcoptic mange. Though at the time of our study no llamas with mange were available for confirmatory sampling, we hypothesize that the introduction of mange-infected llamas may have triggered the outbreak in wild camelids. This unprecedented event in SGNP had devastating effects on dominating herbivores with potentially profound cascading effects at the community and ecosystem levels.
format Artículo
author del Valle Ferreyra, Hebe
Rudd, Jaime
Foley, Janet
Vanstreels, Ralph E.T.
Martín, Ana María
Donadio, Emiliano
Uhart, Marcela M.
author_facet del Valle Ferreyra, Hebe
Rudd, Jaime
Foley, Janet
Vanstreels, Ralph E.T.
Martín, Ana María
Donadio, Emiliano
Uhart, Marcela M.
author_sort del Valle Ferreyra, Hebe
title Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina
title_short Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina
title_full Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina
title_fullStr Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina
title_full_unstemmed Sarcoptic mange outbreak decimates South American wild camelid populations in San Guillermo National Park, Argentina
title_sort sarcoptic mange outbreak decimates south american wild camelid populations in san guillermo national park, argentina
publisher Public Library of Science
publishDate 2022
url http://pa.bibdigital.ucc.edu.ar/3227/1/A_Martin_delValleFerreyra_Rudd.pdf
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