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Disease-mediated piglet mortality prevents wild boar population growth in fenced overabundant settings

Investigation published in European Journal of Wildlife Research

February 15th, 2020

Assessing Eurasian wild boar (Sus scrofa) mortality is a key for understanding population dynamics and adjusting hunting harvest and population management. We used radio-tagging and video-trapping to quantify piglet summer mortality in a managed (i.e. fenced and year-round fed) wild boar population from southern Spain. We used two independent tools to assess wild boar mortality, i.e. radio-tracking and video footage. A total of 32 wild boar piglets were captured at selective feeders acting as cage-traps, and all the piglets were equipped with ear-tag transmitters including a mortality sensor. Additionally, 20 camera traps were set up in video mode at wild boar feeders. Videos were visualized calculating the proportion of piglets seen per adult as a second indicator of piglet mortality. The survival analysis of radio-tagged individuals indicated an average survival of 48% after 180 days of capturing. Mortality was particularly pronounced in the first 2 months, i.e. during summer. Video footage evidenced a progressive decline in the piglet-to-adult ratio throughout summer. Between June and September, this ratio declined by 80.5%. Dead piglets were in poor body condition, and respiratory lesions compatible with the porcine respiratory disease complex (PRDC) were observed in 86% of them. Porcine circovirus type 2 (PCV2) was the most prevalent pathogen (61%) in this study, and its prevalence showed an increasing trend depending on the lung lesion score. We postulate that high piglet mortality at early age might represent a disease-mediated density-dependent mechanism limiting wild boar population growth in semi-intensive management regimes, characterized by year-round feeding and fencing




Barasona JA., Risalde MA., Ortiz JA., Gonzalez-Barrio D., Che Amat A., Perez-Sancho M., Vargas-Castillo L., Xeidakis A., Jurado-Tarifa E. and Gortazar C.




See this article
Disease-mediated piglet mortality prevents wild boar population growth in fenced overabundant settings




Participants:

Universidad ComplutenseServicio de Inmunología Viral y Medicina Preventiva (SUAT). Centro de Vigilancia Sanitaria Veterinaria (VISAVET). Universidad Complutense (UCM).

Universidad ComplutenseDepartamento de Sanidad Animal. Facultad de Veterinaria. Universidad Complutense (UCM).

Gobierno de Castilla-La ManchaSanidad y Biotecnología (SaBio). Instituto de Investigación en Recursos Cinegéticos (IREC). Consejo Superior de Investigaciones Científicas (CSIC). Universidad de Castilla La Mancha (UCLM). Gobierno de Castilla-La Mancha (JCCM).

Universidad de CórdobaDepartamento de Anatomía y Anatomía Patológica Comparadas. Facultad de Veterinaria. Universidad de Córdoba (UCO).

Instituto Maimonides de Investigación Biomédica de CordobaUnidad de Enfermedades Infecciosas. Hospital Universitario Reina Sofía de Córdoba. Instituto Maimonides de Investigación Biomédica de Cordoba.

Medianilla Red Deer GeneticsMedianilla Red Deer Genetics.

Universiti Putra MalaysiaFaculty of Veterinary Medicine. Universiti Putra Malaysia (UPM).

Universidad de CórdobaDepartamento de Sanidad Animal. Facultad de Veterinaria. Universidad de Córdoba (UCO).







European Journal of Wildlife Research
FACTOR YEAR Q
1.184 2018

NLMID: 101242668

ISSN: 1612-4642



TITLE: Disease-mediated piglet mortality prevents wild boar population growth in fenced overabundant settings


JOURNAL: Eur. J. Wildl. Res.


NUMERACIÓN: 66:26


AÑO: 2020


PUBLISHER: Springer


AUTHORS: Barasona JA., Risalde MA., Ortiz JA., Gonzalez-Barrio D., Che Amat A., Perez-Sancho M., Vargas-Castillo L., Xeidakis A., Jurado-Tarifa E. and Gortazar C.


VISAVET PARTICIPANTS


First
José Ángel Barasona García-Arévalo
6th
Marta Pérez Sancho

DOI: https://doi.org/ 10.1007/s10344-020-1363-6


CITE THIS PUBLICATION:

Barasona JA., Risalde MA., Ortiz JA., Gonzalez-Barrio D., Che Amat A., Perez-Sancho M., Vargas-Castillo L., Xeidakis A., Jurado-Tarifa E. and Gortazar C. Disease-mediated piglet mortality prevents wild boar population growth in fenced overabundant settings. European Journal of Wildlife Research. 66:26. 2020. (A). ISSN: 1612-4642. DOI: 10.1007/s10344-020-1363-6


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