Population viability analysis of common marsupials, Didelphis marsupialis and Didelphis virginiana, in a scenario of constant loss of native vegetation

Author:

Cruz-Salazar Bárbara1ORCID,Ruiz-Montoya Lorena2ORCID

Affiliation:

1. Consejo Nacional de Ciencia y Tecnología-Universidad Autónoma de Tlaxcala , Centro Tlaxcala de Biología de la Conducta , Carretera Federal Puebla-Tlaxcala km 1.5, La Loma de Xicohténcatl, CP 90062 , Tlaxcala de Xicohténcatl, Tlaxcala , Mexico

2. El Colegio de la Frontera Sur, Departamento de Conservación de la Biodiversidad , Carretera Panamericana s/n, Barrio de María Auxiliadora, CP 29200 , San Cristóbal de Las Casas, Chiapas , Mexico

Abstract

Abstract We studied the population viability of two common marsupials, Didelphis marsupialis and Didelphis virginiana, based on field data and published ecological and genetic information. Using the VORTEX v. 10. 2.6 program, a 100-year simulation was performed with 1000 iterations for five populations of D. marsupialis and six of D. virginiana. A low probability of extinction was observed in both species, particularly for D. virginiana (0.000–0.007). Population size is higher considering a metapopulation dynamics approach versus individual populations for the two marsupials: 498.25 individuals for D. marsupialis and 367.41 individuals for D. virginiana. The estimated mean genetic diversity was high for both D. marsupialis (H e  = 0.77–0.78) and D. virginiana (H e  = 0.79–0.82). The survival of both species over time could be expected to increase if a metapopulation dynamics is favored over the coming decades, despite a 1.3% loss rate of forest cover. The monitoring of population size and genetic diversity is highly recommended to validate the trends suggested by the model; this is especially true for D. marsupialis, a species associated with conserved areas that are becoming progressively less abundant. This research provides information on the responses of common mammalian species to environmental changes such as deforestation.

Publisher

Walter de Gruyter GmbH

Subject

Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics

Reference63 articles.

1. Adler, G.H., J.J. Arboledo and B.L. Travi. 1997. Population dynamics of Didelphis marsupialis in Northern Colombia. Stud. Neotrop. Fauna E. 32: 7–11.

2. Andersen, L.H., P. Sunde, I. Pellegrino, V. Loeschcke and C. Pertoldi. 2017. Using population viability analysis, genomics, and habitat suitability to forecast future population patterns of Little Owl Athene noctua across Europe. Ecol. Evol. 7: 10987–11001.

3. Aranda, M. 2000. Huellas y otros rastros de los mamíferos grandes y medianos de México. Comisión Nacional para el Conocimiento y Uso de la Biodiversidad. Instituto de Ecología, A. C., Xalapa, Veracruz, Mexico. pp. 212.

4. Beasley, J.C., W.S. Beatty, Z.H. Olson and O.E. Rhodes. 2010. A genetic analysis of the Virginia opossum mating system: evidence of multiple paternity in a highly fragmented landscape. J. Hered. 101: 368–373.

5. Beatty, W.S., J.C. Beasley, G. Dharmarajan and O.E. Rhodes. 2012. A genetic structure of a Virginia opossum (Didelphis virginiana) population inhabiting a fragmented agricultural ecosystem. Can. J. Zool. 90: 101–109.

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