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RESEARCH ARTICLE

Damage to silo bags by mammals in agroecosystems: a contribution for mitigating human–wildlife conflicts

Emmanuel Zufiaurre https://orcid.org/0000-0001-7078-5905 A B D E F , Agustín M. Abba https://orcid.org/0000-0002-7058-4027 C and David Bilenca https://orcid.org/0000-0003-0984-2629 A B
+ Author Affiliations
- Author Affiliations

A Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental, Intendente Güiraldes 2160, Ciudad Universitaria, Pabellón II, 4to piso, Ciudad Autónoma de Buenos Aires, C1428EGA, Argentina.

B CONICET – Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires (IEGEBA), Grupo de Estudios sobre Biodiversidad en Agroecosistemas (GEBA), Intendente Güiraldes 2160, Ciudad Universitaria, Pabellón II, 4to piso, Ciudad Autónoma de Buenos Aires, C1428EGA, Argentina.

C Centro de Estudios Parasitológicos y de Vectores (CONICET-UNLP), Boulevard 120 s/n entre Av. 60 y Calle 64, La Plata, CP 1900, Argentina.

D Present address: Universidad Nacional de San Antonio de Areco (UNSAdA), Grupo para el Estudio del Manejo y Control Biológico de Plagas Agrícolas. Zapiola 237, San Antonio de Areco, CP 2760, Argentina.

E Present address: Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires CITNOBA (UNNOBA-UNSAdA-CONICET), Monteagudo 2772, Pergamino, CP 2700, Argentina.

F Corresponding author. Email: emmanuel.zufiaurre@conicet.gov.ar

Wildlife Research - https://doi.org/10.1071/WR20045
Submitted: 19 March 2020  Accepted: 28 July 2020   Published online: 11 November 2020

Abstract

Context: Damage to harvest storage systems by mammals and associated postharvest losses generate human–wildlife conflicts. Silo bags have been widely adopted worldwide as a type of temporary harvest storage for agricultural crops. The basis of silo-bag technology is the hermetic condition of the plastic lining. Breaks in this silo-bag lining by mammals generate damage of stored content and are a serious concern for farmers, who generally take actions against wildlife with consequent impacts on the environment.

Aims: We described the incidence and intensity of breaks in silo-bag linings by different mammal groups (armadillos, canids and rodents) in agroecosystems of central Argentina, and we analysed the influence of extrinsic and intrinsic factors on patterns of breakage of silo bags, and propose management options based on cultural methods tending to prevent damage and reduce human–wildlife conflicts.

Methods: Sampling was conducted during the austral summer and winter of 2018, at three sites in the Pampas of Argentina. At each site, we chose farms that were using at least one silo bag, described silo-bag characteristics, and recorded the number of breaks in silo bags generated by mammals.

Key results: We sampled a total of 306 silo bags from 38 farms. Damage incidence by mammals comprised 49% of silo bags sampled. Statistical analyses (GLMMs) revealed that damage intensity generally increased with storage time. Seasonality played a key role, with breakage being higher during summer for armadillos, when they are most active, and in winter for rodents, when they are most abundant. Damage by armadillos exhibited geographic variation and also decreased significantly with increasing distance to the nearest plot edge in which the silo bag was placed. Damage by rodents was higher for bags containing grains rather than forage.

Conclusions: Damage to silo bags by mammals was affected by both extrinsic (seasonal and geographical) and intrinsic (stored content, storage time and distance to nearest edge) factors; however, these effects varied according to the mammal group considered.

Implications: Relocation of silo bags away from plot edges could significantly reduce damage by armadillos, the most harmful mammals to silo bags.

Keywords: Chaetophractus villosus, conflict management, cultural management, pest management, post-harvest losses, stored product protection.


References

Abadía, B., Bartosik, R., Cardoso, L., de la Torre, D., and Giorda, J. J. (2013). Manejo eficiente del grano en la poscosecha. In ‘Manual de Buenas Prácticas en Poscosecha de Granos. Hacia el Agregado de Valor en Origen de la Producción Primaria’. (Eds B. Abadía and R. Bartosik.) pp. 13–94. (Ediciones INTA: Buenos Aires, Argentina.)

Abba, A. M., and Vizcaíno, S. F. (2011). Distribución de los armadillos (Xenarthra: Dasypodidae) en la provincia de Buenos Aires, Argentina. Mastozoología Neotropical 18, 185–206.

Abba, A. M., Vizcaíno, S. F., and Cassini, M. H. (2007). Effects of land use on the distribution of three species of armadillos in the Argentinean Pampas. Journal of Mammalogy 88, 502–507.
Effects of land use on the distribution of three species of armadillos in the Argentinean Pampas.Crossref | GoogleScholarGoogle Scholar |

Abba, A. M., Zufiaurre, E., Codesido, M., and Bilenca, D. N. (2015a). Burrowing activity by armadillos in agroecosystems of central Argentina: biogeography, land use, and rainfall effects. Agriculture, Ecosystems & Environment 200, 54–61.
Burrowing activity by armadillos in agroecosystems of central Argentina: biogeography, land use, and rainfall effects.Crossref | GoogleScholarGoogle Scholar |

Abba, A. M., Zufiaurre, E., Gado, P. A., Codesido, M., and Bilenca, D. N. (2015b). Distribución de tres especies de armadillos en la región pampeana comprendida en la provincia de Buenos Aires, Argentina. Mastozoología Neotropical 22, 359–365.

Abba, A., Zufiaurre, E., Codesido, M., and Bilenca, D. (2016). Habitat use by armadillos in agroecosystems of central Argentina: does plot identity matter? Journal of Mammalogy 97, 1265–1271.
Habitat use by armadillos in agroecosystems of central Argentina: does plot identity matter?Crossref | GoogleScholarGoogle Scholar |

Bartosik, R. (2012). An inside look at the silo-bag system. In ‘Proc of the 9th International Conference on Controlled Atmosphere and Fumigation in Stored Products’. (Eds S. Navarro, H. J. Banks, D. S. Jayas, C. H. Bell, R. T. Noyes, A. G. Ferizli, M. Emekci, A. A. Isikber, and K. Alagusundaram.) pp. 117–128. (ARBER Professional Congress Services, Turkey: Antalya, Turkey.)

Belmain, S. R., Htwe, N. M., Kamal, N. Q., and Singleton, G. R. (2015). Estimating rodent losses to stored rice as a means to assess efficacy of rodent management. Wildlife Research 42, 132–142.
Estimating rodent losses to stored rice as a means to assess efficacy of rodent management.Crossref | GoogleScholarGoogle Scholar |

Bilenca, D. N., Kravetz, F. O., and Zuleta, G. A. (1992). Food habits of Akodon azarae and Calomys laucha (Cricetidae, Rodentia) in agroecosystems of central Argentina. Mammalia 56, 371–383.
Food habits of Akodon azarae and Calomys laucha (Cricetidae, Rodentia) in agroecosystems of central Argentina.Crossref | GoogleScholarGoogle Scholar |

Bilenca, D., González-Fischer, C., Teta, P., and Zamero, M. (2007). Agricultural intensification and small mammal assemblages in agroecosystems of the Rolling Pampas, central Argentina. Agriculture, Ecosystems & Environment 121, 371–375.
Agricultural intensification and small mammal assemblages in agroecosystems of the Rolling Pampas, central Argentina.Crossref | GoogleScholarGoogle Scholar |

Bilenca, D., Abba, A., Corriale, M., Pérez Carusi, L., Pedelacq, M., and Zufiaurre, E. (2017). De venados, armadillos y coipos: los mamíferos autóctonos frente a los cambios en el uso del suelo, los manejos agropecuarios y la presencia de nuevos elementos en el paisaje rural. Mastozoología Neotropical 24, 277–287.

Bolsa de Cereales de Buenos Aires (2019). Departamento de Estimaciones Agrícolas. Informe Cierre de Campaña 2018/19. Available at http://www.bolsadecereales.org [verified 23 August 2019].

Brooks, M. E., Kristensen, K., van Benthem, K., Magnusson, A., Berg, C. W., Nielsen, A., Skaug, H. J., Maechler, M., and Bolker, B. M. (2017). glmmTMB balances speed and flexibility among packages for zero-inflated generalized linear mixed modeling. The R Journal 9, 378–400.
glmmTMB balances speed and flexibility among packages for zero-inflated generalized linear mixed modeling.Crossref | GoogleScholarGoogle Scholar |

Canavelli, S. B., Aramburú, R., and Zaccagnini, M. E. (2012). Aspectos a considerar para disminuir los conflictos originados por los daños de la cotorra (Myiopsitta monachus) en cultivos agrícolas. El Hornero 27, 89–101.

Canel, D., Scioscia, N. P., Denegri, G. M., and Kittlein, M. (2016). Dieta del zorro gris pampeano (Lycalopex gymnocercus) en la provincia de Buenos Aires. Mastozoología Neotropical 23, 359–370.

Cavia, R., Gómez Villafañe, I. E., Cittadino, E. A., Bilenca, D. N., Miño, M. H., and Busch, M. (2005). Effects of cereal harvest on abundance and spatial distribution of the rodent Akodon azarae in central Argentina. Agriculture, Ecosystems & Environment 107, 95–99.
Effects of cereal harvest on abundance and spatial distribution of the rodent Akodon azarae in central Argentina.Crossref | GoogleScholarGoogle Scholar |

Crawley, M. J. (2007). ‘The R Book.’ (John Wiley & Sons: Chichester, UK.)

Darby, J. A., and Caddick, L. P. (2007). Review of grain harvest bag technology under Australian conditions. Technical report no. 105. pp. 112. CSIRO Entomology, Canberra, ACT, Australia.

Ellis, B. A., Mills, J. N., Glass, G. E., McKee, K. T., Enria, D. A., and Childs, J. E. (1998). Dietary habits of the common rodents in an agroecosystem in Argentina. Journal of Mammalogy 79, 1203–1220.
Dietary habits of the common rodents in an agroecosystem in Argentina.Crossref | GoogleScholarGoogle Scholar |

Gallo, J. A., Fasola, L., and Abba, A. M. (2019). Armadillos as natural pests control? Food habits of five armadillo species in Argentina. Mastozoología Neotropical 26, 117–127.
Armadillos as natural pests control? Food habits of five armadillo species in Argentina.Crossref | GoogleScholarGoogle Scholar |

González Fischer, C. M., Codesido, M., Teta, P., and Bilenca, D. (2011). Seasonal and geographic variation in the diet of barn owls (Tyto alba) in temperate agroecosystems of Argentina. Ornitologia Neotropical 22, 295–305.

González Fischer, C. M., Baldi, G., Codesido, M., and Bilenca, D. (2012). Seasonal variations in small mammal-landscape associations in temperate agroecosystems: a study case in Buenos Aires province, central Argentina. Mammalia 76, 399–406.
Seasonal variations in small mammal-landscape associations in temperate agroecosystems: a study case in Buenos Aires province, central Argentina.Crossref | GoogleScholarGoogle Scholar |

González Fischer, C. M., Cavia, R., Picasso, P., and Bilenca, D. (2017). Regional and local determinants of rodent assemblages in agroecosystems of the Argentine Pampas. Journal of Mammalogy 98, 1760–1767.
Regional and local determinants of rodent assemblages in agroecosystems of the Argentine Pampas.Crossref | GoogleScholarGoogle Scholar |

Hagstrum, D. W., Phillips, T. W., and Cuperus, G. (2012). ‘Stored Product Protection.’ (Kansas State University Agricultural Experiment Station and Cooperative Extension Service: Manhattan, KS, USA.)

Hartig, F. (2020). ‘DHARMa: Residual Diagnostics for Hierarchical (Multi-level/mixed) Regression Models.’ R package version 0.3.1. Available at https://CRAN.R-project.org/package=DHARMa [verified 22 June 2020].

Hobbs, R. J., Arico, S., Aronson, J., Baron, J. S., Bridgewater, P., Cramer, V. A., Epstein, P. R., Ewel, J. J., Klink, C. A., Lugo, A. E., Norton, D., Ojima, D., Richardson, D. M., Sanderson, E. W., Valladares, F., Vilà, M., Zamora, R., and Zobel, M. (2006). Novel ecosystems: theoretical and management aspects of the new ecological world order. Global Ecology and Biogeography 15, 1–7.
Novel ecosystems: theoretical and management aspects of the new ecological world order.Crossref | GoogleScholarGoogle Scholar |

Hodges, R. J., Buzby, J. C., and Bennett, B. (2011). Postharvest losses and waste in developed and less developed countries: opportunities to improve resource use. The Journal of Agricultural Science 149, 37–45.
Postharvest losses and waste in developed and less developed countries: opportunities to improve resource use.Crossref | GoogleScholarGoogle Scholar |

Jackson, J. E. (1988). Terrestrial mammalian pests in Argentina-an overview. In ‘Proceedings of the Thirteenth Vertebrate Pest Conference’. (Eds A. Crabb, and R. Marsh.) pp. 196–198. (University of California, Davis: Monterey, CA, USA.)

Kaulfuß, P., and Mills, D. S. (2008). Neophilia in domestic dogs (Canis familiaris) and its implication for studies of dog cognition. Animal Cognition 11, 553–556.
Neophilia in domestic dogs (Canis familiaris) and its implication for studies of dog cognition.Crossref | GoogleScholarGoogle Scholar | 18183436PubMed |

Kell, S. A. (2012). Vertebrates in stored products. In ‘Stored Product Protection’. (Eds D. W. Hagstrum, T. W. Phillips, and G. Cuperus.) pp. 69–84. (Kansas State Research and Extension: Manhattan, KS, USA.)

Lenth, R. (2020). ‘emmeans: Estimated Marginal Means, aka Least-Squares Means.’ R package version 1.4.7. Available at https://CRAN.R-project.org/package=emmeans [verified 22 June 2020].

Lovera, R., Fernández, S. M., and Cavia, R. (2015). Wild small mammals in intensive milk cattle and swine production systems. Agriculture, Ecosystems & Environment 202, 251–259.
Wild small mammals in intensive milk cattle and swine production systems.Crossref | GoogleScholarGoogle Scholar |

Lovera, R., Fernández, M. S., and Cavia, R. (2019). Small rodent species on pig and dairy farms: habitat selection and distribution. Pest Management Science 75, 1234–1241.
Small rodent species on pig and dairy farms: habitat selection and distribution.Crossref | GoogleScholarGoogle Scholar | 30536608PubMed |

MacLeod, C. J., Tompkins, D. M., Drew, K. W., and Pyke, N. (2011). Does farm-scale habitat composition predict pest-bird numbers and distribution? Wildlife Research 38, 464–474.
Does farm-scale habitat composition predict pest-bird numbers and distribution?Crossref | GoogleScholarGoogle Scholar |

McNab, B. K. (1979). The influence of body size on the energetics and distribution of fossorial and burrowing mammals. Ecology 60, 1010–1021.
The influence of body size on the energetics and distribution of fossorial and burrowing mammals.Crossref | GoogleScholarGoogle Scholar |

Mdangi, M., Mulungu, L. S., Massawe, A. W., Eiseb, S. J., Tutjavi, V., Kirsten, F., Mahlaba, T., Malebane, P., von Maltitz, E., Monadjem, A., Dlamini, N., Makundi, R. H., and Belmain, S. R. (2013). Assessment of rodent damage to stored maize (Zea mays L.) on smallholder farms in Tanzania. International Journal of Pest Management 59, 55–62.
Assessment of rodent damage to stored maize (Zea mays L.) on smallholder farms in Tanzania.Crossref | GoogleScholarGoogle Scholar |

Mills, J. N., Ellis, B. A., Mckee, K. T., Maiztegui, J. I., and Childs, J. E. (1991). Habitat associations and relative densities of rodent populations in cultivated areas of central Argentina. Journal of Mammalogy 72, 470–479.
Habitat associations and relative densities of rodent populations in cultivated areas of central Argentina.Crossref | GoogleScholarGoogle Scholar |

Mlambo, S., Mvumi, B. M., Stathers, T., Mubayiwa, M., and Nyabako, T. (2017). Field efficacy of hermetic and other maize grain storage options under smallholder farmer management. Crop Protection 98, 198–210.
Field efficacy of hermetic and other maize grain storage options under smallholder farmer management.Crossref | GoogleScholarGoogle Scholar |

Monadjem, A., Mahlaba, T. A., Dlamini, N., Eiseb, S. J., Belmain, S. R., Mulungu, L. S., Massawe, A. W., Makundi, R. H., Mohr, K., and Taylor, P. J. (2011). Impact of crop cycle on movement patterns of pest rodent species between fields and houses in Africa. Wildlife Research 38, 603–609.
Impact of crop cycle on movement patterns of pest rodent species between fields and houses in Africa.Crossref | GoogleScholarGoogle Scholar |

Ndegwa, M. K., De Groote, H., Gitonga, Z. M., and Bruce, A. Y. (2016). Effectiveness and economics of hermetic bags for maize storage: results of a randomized controlled trial in Kenya. Crop Protection 90, 17–26.
Effectiveness and economics of hermetic bags for maize storage: results of a randomized controlled trial in Kenya.Crossref | GoogleScholarGoogle Scholar |

Ognakossan, K. E., Affognon, H. D., Mutungi, C. M., Sila, D. N., Midingoyi, S. K. G., and Owino, W. O. (2016). On-farm maize storage systems and rodent postharvest losses in six maize growing agro-ecological zones of Kenya. Food Security 8, 1169–1189.
On-farm maize storage systems and rodent postharvest losses in six maize growing agro-ecological zones of Kenya.Crossref | GoogleScholarGoogle Scholar |

Ognakossan, K. E., Mutungi, C. M., Otieno, T. O., Affognon, H. D., Sila, D. N., and Owino, W. O. (2018). Quantitative and quality losses caused by rodents in on-farm stored maize: a case study in the low land tropical zone of Kenya. Food Security 10, 1525–1537.
Quantitative and quality losses caused by rodents in on-farm stored maize: a case study in the low land tropical zone of Kenya.Crossref | GoogleScholarGoogle Scholar |

Pullen, A. J., Merrill, R. J. N., and Bradshaw, J. W. S. (2012). Habituation and dishabituation during object play in kennel-housed dogs. Animal Cognition 15, 1143–1150.
Habituation and dishabituation during object play in kennel-housed dogs.Crossref | GoogleScholarGoogle Scholar | 22825035PubMed |

R Core Team (2020). ‘R: a Language and Environment for Statistical Computing. R Version 4.0.1.’ (R Foundation for Statistical Computing: Vienna, Austria.) Available at https://www.R-project.org/ [verified 22 June 2020].

Santos, P. M., Bocchiglieri, A., Chiarello, A. G., Paglia, A. P., Moreira, A., de Souza, A. C., Abba, A. M., Paviolo, A., Gatica, A,, Medeiro, A. Z., et al. (2019). Neotropical xenarthrans: a data set of occurrence of xenarthran species in the Neotropics. Ecology 100, e02663.
Neotropical xenarthrans: a data set of occurrence of xenarthran species in the Neotropics.Crossref | GoogleScholarGoogle Scholar | 31013542PubMed |

Serafini, V. N., Priotto, J. W., and Gomez, M. D. (2019). Effects of agroecosystem landscape complexity on small mammals: a multi-species approach at different spatial scales. Landscape Ecology 34, 1117–1129.
Effects of agroecosystem landscape complexity on small mammals: a multi-species approach at different spatial scales.Crossref | GoogleScholarGoogle Scholar |

Singleton, G. R., Leirs, H., Hinds, L. A., and Zhang, Z. B. (1999). Ecologically-based management of rodent pests: re-evaluating our approach to an old problem. In ‘Ecologically-based Rodent Management’. (Eds G. R. Singleton, L. A. Hinds, H. Leirs, and Z. Zhang.) pp. 17–29. (Australian Center for International Agricultural Research: Canberra, ACT, Australia.)

Soriano, A., León, R. J. C., Sala, O. E., Lavado, R. S., Deregibus, V. A., Cauhépé, M. A., Scaglia, O. A., Velázquez, C. A., and Lemcoff, J. H. (1991). Río de la Plata grasslands. In ‘Ecosystems of the World, Vol. 8A. Natural Grasslands: Introduction and Western Hemisphere’. (Ed. R. T. Coupland.) pp. 367–407. (Elsevier: Amsterdam, Netherlands.)

Stejskal, V., Aulicky, R., and Kucerova, Z. (2014). Pest control strategies and damage potential of seed-infesting pests in the Czech stores: a review. Plant Protection Science 50, 165–173.
Pest control strategies and damage potential of seed-infesting pests in the Czech stores: a review.Crossref | GoogleScholarGoogle Scholar |

Taher, H. I., Urcola, H. A., Bartosik, R. E., and Cendoya, M. G. (2019a). Caracterización del uso del silo bolsa en la provincia de Buenos Aires. Ciencias Agronómicas. Revista de Investigaciones de la Facultad de Ciencias Agrarias UNR XXXIII, 25–30.
Caracterización del uso del silo bolsa en la provincia de Buenos Aires.Crossref | GoogleScholarGoogle Scholar |

Taher, H. I., Urcola, H. A., Cendoya, M. G., and Bartosik, R. E. (2019b). Predicting soybean losses using carbon dioxide monitoring during storage in silo bags. Journal of Stored Products Research 82, 1–8.
Predicting soybean losses using carbon dioxide monitoring during storage in silo bags.Crossref | GoogleScholarGoogle Scholar |

Travaini, A., Vassallo, A. I., García, G. O., Echeverría, A. I., Zapata, S. C., and Nielsen, S. (2013). Evaluation of neophobia and its potential impact upon predator control techniques: a study on two sympatric foxes in southern Patagonia. Behavioural Processes 92, 79–87.
Evaluation of neophobia and its potential impact upon predator control techniques: a study on two sympatric foxes in southern Patagonia.Crossref | GoogleScholarGoogle Scholar | 23124014PubMed |

Viglizzo, E. F., Frank, F. C., Carreño, L. V., Jobbágy, E. G., Pereyra, H., Clatt, J., Pincén, D., and Ricard, M. F. (2011). Ecological and environmental footprint of 50 years of agricultural expansion in Argentina. Global Change Biology 17, 959–973.
Ecological and environmental footprint of 50 years of agricultural expansion in Argentina.Crossref | GoogleScholarGoogle Scholar |

Zufiaurre, E., Codesido, M., Abba, A. M., and Bilenca, D. (2017). The seasonal role of field characteristics on seed-eating bird abundances in agricultural landscapes. Current Zoology 63, 279–286.
The seasonal role of field characteristics on seed-eating bird abundances in agricultural landscapes.Crossref | GoogleScholarGoogle Scholar | 29491986PubMed |

Zufiaurre, E., Abba, A. M., and Bilenca, D. N. (2019a). Assessment of stakeholder perceptions of the damage to silo bags by vertebrate species in Argentina. Human Dimensions of Wildlife 24, 80–86.
Assessment of stakeholder perceptions of the damage to silo bags by vertebrate species in Argentina.Crossref | GoogleScholarGoogle Scholar |

Zufiaurre, E., Codesido, M., González-Fischer, C. M., Abba, A. M., and Bilenca, D. N. (2019b). Landbird assemblages in temperate agroecosystems: analyses at plot and landscape scales. Ornithological Science 18, 69–79.
Landbird assemblages in temperate agroecosystems: analyses at plot and landscape scales.Crossref | GoogleScholarGoogle Scholar |

Zuur, A. F., Ieno, E. N., Walker, N. J., Saveliev, A. A., and Smith, G. M. (2009). ‘Mixed Effects Models and Extensions in Ecology with R.’ (Springer: New York, NY, USA.)