Forage strategies of bighorn sheep (Ovis canadensis mexicana) in northeastern Mexico

Authors

  • Fernando Isaac Gastelum-Mendoza Universidad Autónoma de Baja California
  • Eloy Alejandro Lozano-Cavazos Universidad Autónoma Agraria Antonio Narro
  • Fernando Noel González-Saldívar Facultad de Ciencias Forestales, Universidad Autónoma de Nuevo León
  • José Isidro Uvalle-Sauceda Facultad de Ciencias Forestales, Universidad Autónoma de Nuevo León
  • Guillermo Romero-Figueroa Facultad de Ciencias, Universidad Autónoma de Baja California
  • Ricardo Serna-Lagunes Unidad de Manejo y Conservación de Recursos Genéticos, Facultad de Ciencias Biológicas y Agropecuarias, región Orizaba - Córdoba, Universidad Veracruzana.
  • Luis Antonio Tarango-Arámbula Posgrado en Innovación en Manejo de Recursos Naturales, Campus San Luis Potosí, Colegio de Postgraduados
  • César Martín Cantú-Ayala Facultad de Ciencias Forestales, Universidad Autónoma de Nuevo León

DOI:

https://doi.org/10.19136/era.a11n1.3921

Keywords:

Shrubberies, Canfield, scrub, grasses, selection

Abstract

Understanding the dietary needs is important for the conservation of the bighorn sheep. The objective was to identify the diet selection in Coahuila, Mexico. The research was conducted at the Rancho San Juan Wildlife Management Unit (UMA), Monclova municipality, from August 2018 to October 2019. Forage availability was assessed using 18 Canfield transects. Diet composition was estimated through microhistology on 280 fecal samples, and diet and forage diversity were assessed using the Shannon index. Cluster and principal component analyses (PCA) were applied to analyze similarity in consumption across different species and seasonal influences. Shrubs were the most available (48%). A total of 50 species and 14 families were identified in the diet, with shrubs (49.2%) and grasses (17.21%) being predominant. Tiquilia canescens, Gymnosperma glutinosum, Opuntia rufida, Medicago sativa, and Erioneuron pulchellum were the most consumed species. The bighorn sheep consumed tree and shrub species proportionally (1.1 and 1.02, respectively), preferred herbaceous plants in spring (2.24) and autumn (15.28), and grasses in spring (6.10), except in summer (0.83) when they avoided succulents. PCA revealed that the first two components explained 96.05% of the correlation between species consumption frequencies and their biological forms. Cluster analysis grouped five forage consumption categories. Conserving shrub species, which form the basis of the bighorn sheep's diet, grasses—its preference—and succulents as buffering elements, is essential.

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References

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Published

2024-03-05

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SCIENTIFIC ARTICLE

How to Cite

Gastelum-Mendoza, F. I., Lozano-Cavazos, E. A., González-Saldívar, F. N., Uvalle-Sauceda, J. I., Romero-Figueroa, G., Serna-Lagunes, R., Tarango-Arámbula, L. A., & Cantú-Ayala, C. M. (2024). Forage strategies of bighorn sheep (Ovis canadensis mexicana) in northeastern Mexico. Ecosistemas Y Recursos Agropecuarios, 11(1). https://doi.org/10.19136/era.a11n1.3921

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