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Wolf Lethal Control and Livestock Depredations: Counter-Evidence from Respecified Models

We replicated the study conducted by Wielgus and Peebles (2014) on the effect of wolf mortality on livestock depredations in Montana, Wyoming and Idaho states in the US. Their best models were found to be misspecified due to the omission of the time index and incorrect functional form. When we respe...

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Detalles Bibliográficos
Autores principales: Poudyal, Niraj, Baral, Nabin, Asah, Stanley T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4751083/
https://www.ncbi.nlm.nih.gov/pubmed/26866592
http://dx.doi.org/10.1371/journal.pone.0148743
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author Poudyal, Niraj
Baral, Nabin
Asah, Stanley T.
author_facet Poudyal, Niraj
Baral, Nabin
Asah, Stanley T.
author_sort Poudyal, Niraj
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description We replicated the study conducted by Wielgus and Peebles (2014) on the effect of wolf mortality on livestock depredations in Montana, Wyoming and Idaho states in the US. Their best models were found to be misspecified due to the omission of the time index and incorrect functional form. When we respecified the models, this replication failed to confirm the magnitude, direction and often the very existence of the original results. Wielgus and Peebles (2014) reported that the increase in the number of wolves culled the previous year would increase the expected number of livestock killed this year by 4 to 6%. But our results showed that the culling of one wolf the previous year would decrease the expected number of cattle killed this year by 1.9%, and the expected number of sheep killed by 3.4%. However, for every wolf killed there is a corresponding 2.2% increase in the expected number of sheep killed in the same year. The increase in sheep depredation appears to be a short term phenomenon.
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spelling pubmed-47510832016-02-26 Wolf Lethal Control and Livestock Depredations: Counter-Evidence from Respecified Models Poudyal, Niraj Baral, Nabin Asah, Stanley T. PLoS One Research Article We replicated the study conducted by Wielgus and Peebles (2014) on the effect of wolf mortality on livestock depredations in Montana, Wyoming and Idaho states in the US. Their best models were found to be misspecified due to the omission of the time index and incorrect functional form. When we respecified the models, this replication failed to confirm the magnitude, direction and often the very existence of the original results. Wielgus and Peebles (2014) reported that the increase in the number of wolves culled the previous year would increase the expected number of livestock killed this year by 4 to 6%. But our results showed that the culling of one wolf the previous year would decrease the expected number of cattle killed this year by 1.9%, and the expected number of sheep killed by 3.4%. However, for every wolf killed there is a corresponding 2.2% increase in the expected number of sheep killed in the same year. The increase in sheep depredation appears to be a short term phenomenon. Public Library of Science 2016-02-11 /pmc/articles/PMC4751083/ /pubmed/26866592 http://dx.doi.org/10.1371/journal.pone.0148743 Text en © 2016 Poudyal et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Poudyal, Niraj
Baral, Nabin
Asah, Stanley T.
Wolf Lethal Control and Livestock Depredations: Counter-Evidence from Respecified Models
title Wolf Lethal Control and Livestock Depredations: Counter-Evidence from Respecified Models
title_full Wolf Lethal Control and Livestock Depredations: Counter-Evidence from Respecified Models
title_fullStr Wolf Lethal Control and Livestock Depredations: Counter-Evidence from Respecified Models
title_full_unstemmed Wolf Lethal Control and Livestock Depredations: Counter-Evidence from Respecified Models
title_short Wolf Lethal Control and Livestock Depredations: Counter-Evidence from Respecified Models
title_sort wolf lethal control and livestock depredations: counter-evidence from respecified models
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4751083/
https://www.ncbi.nlm.nih.gov/pubmed/26866592
http://dx.doi.org/10.1371/journal.pone.0148743
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