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Salgado R, Barja I, Hernández MDC, Lucero B, Castro-Arellano I, Bonacic C, Rubio AV. Activity patterns and interactions of rodents in an assemblage composed by native species and the introduced black rat: implications for pathogen transmission. BMC ZOOL 2022; 7:48. [PMID: 36042784 PMCID: PMC9412813 DOI: 10.1186/s40850-022-00152-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 08/12/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The degree of temporal overlap between sympatric wild hosts species and their behavioral interactions can be highly relevant to the transmission of pathogens. However, this topic has been scantly addressed. Furthermore, temporal overlap and interactions within an assemblage of wild rodents composed of native and introduced species have been rarely discussed worldwide. We assessed the nocturnal activity patterns and interactions between rodent taxa of an assemblage consisting of native species (Oligoryzomys longicaudatus, Abrothrix hirta, and Abrothrix olivaceus) and the introduced black rat (Rattus rattus) in a temperate forest from southern Chile. All rodent species in this study are known hosts for various zoonotic pathogens.
Results
We found a high nocturnal temporal overlap within the rodent assemblage. However, pairwise comparisons of temporal activity patterns indicated significant differences among all taxa. Rattus rattus showed aggressive behaviors against all native rodents more frequently than against their conspecifics. As for native rodents, agonistic behaviors were the most common interactions between individuals of the same taxon and between individuals of different taxa (O. longicaudatus vs Abrothrix spp.).
Conclusions
Our findings reveal several interactions among rodent taxa that may have implications for pathogens such as hantaviruses, Leptospira spp., and vector-borne pathogens. Furthermore, their transmission may be facilitated by the temporal overlap observed between rodent taxa.
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Zúñiga AH, Rau JR, Jaksic FM, Vergara PM, Encina‐Montoya F, Fuentes‐Ramírez A. Rodent assemblage composition as indicator of fire severity in a protected area of south‐central Chile. AUSTRAL ECOL 2020. [DOI: 10.1111/aec.12975] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Alfredo H. Zúñiga
- Laboratorio de Ecología Departamento de Ciencias Biológicas y Biodiversidad Universidad de Los Lagos Campus Osorno OsornoChile
- Programa de Doctorado en Ciencias mención Conservación y Manejo de Recursos Naturales Universidad de Los Lagos Puerto MonttChile
- Center of Applied Ecology and Sustainability (CAPES) Pontificia Universidad Católica de Chile SantiagoChile
| | - Jaime R. Rau
- Laboratorio de Ecología Departamento de Ciencias Biológicas y Biodiversidad Universidad de Los Lagos Campus Osorno OsornoChile
| | - Fabián M. Jaksic
- Center of Applied Ecology and Sustainability (CAPES) Pontificia Universidad Católica de Chile SantiagoChile
| | - Pablo M. Vergara
- Departamento de Gestión Agraria Universidad de Santiago de Chile SantiagoChile
| | | | - Andrés Fuentes‐Ramírez
- Laboratorio de Biometría Departamento de Ciencias Forestales Universidad de La Frontera TemucoChile
- Butamallin Research Center for Global Change Universidad de La Frontera TemucoChile
- Instituto de Ecología y Biodiversidad (IEB) Santiago Chile
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Ortiz N, Juan EE, Chiappero MB, Gardenal CN, Provensal MC, Polop JJ, González-Ittig RE. Microgeographic genetic structure of Oligoryzomys longicaudatus (Rodentia, Cricetidae) in periods of different population density. J Mammal 2019. [DOI: 10.1093/jmammal/gyz152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AbstractThe long-tailed pygmy rice rat Oligoryzomys longicaudatus (Rodentia, Cricetidae) experiences marked population density fluctuations. This species is the major reservoir of the Andes orthohantavirus associated with the hantavirus pulmonary syndrome in southern Argentina, and information on dispersal patterns at different population densities, or differences in dispersal between the sexes during those periods, could contribute to understanding risk of viral transmission among individuals. We examined the spatial genetic structure of O. longicaudatus at a local scale to elucidate how variation in population density influences dispersal patterns. Effective dispersal levels were estimated through spatial genetic autocorrelation (SGA) analyses in periods of different density, and for females and males separately, within an area of 510 × 180 m, using seven microsatellite loci. In autumn (high-intermediate and intermediate densities), SGA was primarily determined by females, which show philopatric behavior in defense of their nests and newborns. In summer (low density), neither sex showed SGA, which could be due to spacing behavior combined with high recruitment rates among adjacent environments. At high-intermediate densities, females remained close to each other, contracting their home ranges. These established individuals would “fence” the area, preventing the immigration of individuals from proximate areas, until population density declines again. We detected differential patterns of effective dispersal for both sexes in different stages of the annual and inter-annual population phases of O. longicaudatus. Since high levels of gene flow were reported for both sexes in summer and for males in all analyzed seasons, the transmission risk of diseases such as hantavirus pulmonary syndrome would be high at a local scale.La densidad poblacional del ratón “colilargo” Oligoryzomys longicaudatus (Rodentia, Cricetidae) experimenta marcadas fluctuaciones. Esta especie es el principal reservorio del ortohantavirus Andes, asociado con el síndrome pulmonar por hantavirus en el sur de Argentina. El conocimiento sobre los patrones de dispersión a diferentes densidades poblacionales y entre los sexos durante esos períodos, podría contribuir a evaluar el riesgo de transmisión viral entre individuos. Examinamos la estructura genética espacial de O. longicaudatus a escala local para determinar de qué manera las variaciones en la densidad poblacional influyen sobre los patrones de dispersión del roedor. Los niveles de dispersión efectiva se estimaron mediante análisis de autocorrelación genética espacial (AGE) utilizando siete loci de microsatélites, dentro de un área de 510 × 180 m. Los análisis se hicieron en distintos períodos de densidad para la población general y para hembras y machos por separado. En otoño (densidad alta-intermedia e intermedia), la AGE estuvo determinada principalmente por las hembras, lo que podría explicarse por su comportamiento filopátrico en relación a la defensa de sus nidos y crías. En verano (baja densidad), ninguno de los sexos mostró AGE, debido a un comportamiento de espaciamiento combinado con altas tasas de reclutamiento entre ambientes adyacentes con diferentes recursos. A densidades altas-intermedias, las hembras permanecieron cerca una de la otra, contrayendo su área de acción. Estos individuos cercarían el área, evitando la inmigración de individuos de áreas cercanas, hasta que la densidad poblacional disminuya nuevamente. Detectamos patrones diferenciales de dispersión efectiva para ambos sexos en cada una de las fases de densidad poblacional (anual e interanual) de O. longicaudatus. El riesgo de transmisión del síndrome pulmonar por hantavirus sería elevado a escala local, dado que se detectaron altos niveles de flujo génico para ambos sexos en verano y para los machos en todas las estaciones analizadas.
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Affiliation(s)
- Natalia Ortiz
- Instituto de Diversidad y Ecología Animal (IDEA), CONICET and Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, CP 5000, Córdoba, Argentina
- Cátedra de Genética de Poblaciones y Evolución, Facultad de Ciencias Exactas, Físicas y Naturales, UNC, Av. Vélez Sársfield 299, CP 5000, Córdoba, Argentina
| | - Ernesto E Juan
- Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No. 3, 5800 Río Cuarto, Córdoba, Argentina
| | - Marina B Chiappero
- Instituto de Diversidad y Ecología Animal (IDEA), CONICET and Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, CP 5000, Córdoba, Argentina
- Cátedra de Genética de Poblaciones y Evolución, Facultad de Ciencias Exactas, Físicas y Naturales, UNC, Av. Vélez Sársfield 299, CP 5000, Córdoba, Argentina
| | - Cristina N Gardenal
- Instituto de Diversidad y Ecología Animal (IDEA), CONICET and Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, CP 5000, Córdoba, Argentina
- Cátedra de Genética de Poblaciones y Evolución, Facultad de Ciencias Exactas, Físicas y Naturales, UNC, Av. Vélez Sársfield 299, CP 5000, Córdoba, Argentina
| | - María C Provensal
- Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No. 3, 5800 Río Cuarto, Córdoba, Argentina
| | - Jaime J Polop
- Departamento de Ciencias Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No. 3, 5800 Río Cuarto, Córdoba, Argentina
| | - Raúl E González-Ittig
- Instituto de Diversidad y Ecología Animal (IDEA), CONICET and Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, CP 5000, Córdoba, Argentina
- Cátedra de Genética de Poblaciones y Evolución, Facultad de Ciencias Exactas, Físicas y Naturales, UNC, Av. Vélez Sársfield 299, CP 5000, Córdoba, Argentina
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Muñoz-Pedreros A, Yáñez J, Gil C, Norambuena HV, Carmona ER. Spatial differences in the diet of the Magellanic horned owl Bubo magellanicus (Gmelin, 1788) in central Chile. NEW ZEALAND JOURNAL OF ZOOLOGY 2016. [DOI: 10.1080/03014223.2016.1249379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- A. Muñoz-Pedreros
- Núcleo de Investigación en Estudios Ambientales NEA, Facultad de Recursos Naturales, Escuela de Ciencias Ambientales, Universidad Católica de Temuco, Temuco, Chile
| | - J. Yáñez
- Museo Nacional de Historia Natural, Santiago de Chile, Chile
- Programa de Conservación de Aves Rapaces y Control Biológico, Centro de Estudios Agrarios y Ambientales CEA, Valdivia, Chile
| | - C. Gil
- Programa de Conservación de Aves Rapaces y Control Biológico, Centro de Estudios Agrarios y Ambientales CEA, Valdivia, Chile
| | - H. V. Norambuena
- Programa de Conservación de Aves Rapaces y Control Biológico, Centro de Estudios Agrarios y Ambientales CEA, Valdivia, Chile
| | - E. R. Carmona
- Núcleo de Investigación en Estudios Ambientales NEA, Facultad de Recursos Naturales, Escuela de Ciencias Ambientales, Universidad Católica de Temuco, Temuco, Chile
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Queirolo D, Granzinolli MAM. Ecology and natural history of Akodon lindberghi (Rodentia, Sigmodontinae) in southeastern Brazil. IHERINGIA. SERIE ZOOLOGIA 2009. [DOI: 10.1590/s0073-47212009000200011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We studied the ecology and natural history of the globally threatened and poorly known Akodon lindberghi Hershkovitz, 1990 in Parque Nacional da Serra da Canastra (PNSC) and Juiz de Fora (JF), southeastern Brazil. From November 1998 to September 2001 a total of 131 individuals were captured in wire-cage live-traps and 52 by pitfalls traps. They were all marked and released at the site. The largest abundances were registered during the dry season, and most of the captures occurred in open habitats. The mean body mass of the two populations was significantly different (18.1 g at PNSC versus 13.1 g at JF; H = 46.2678, g.l.=2, p<0.001). In PNSC, individuals were reproductively active from August to February, and juveniles were present from May to August. The results suggest that the changes in vegetation structure caused by deforestation and intensive agricultural activities could increase the predation rate, affecting the mean body mass of the population.
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