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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2016
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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 |
collection | PubMed |
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. |
format | Online Article Text |
id | pubmed-4751083 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
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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