Demographic Features and Habitat Preferences of Osgoodomys banderanus (Osgood's Deermouse) in Colima, Mexico

Osgoodomys banderanus (Osgood's deermouse) was studied in January 2006 and 2007 in north-central Colima, Mexico. During 8 nights each year, five mark-recapture grids were established with elevated and ground traps. For 16,000 trap-nights, 123 individuals were captured 385 times (comprising 9.4%...

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Bibliographic Details
Published in:The Southwestern naturalist 2013-03, Vol.58 (1), p.8-19
Main Authors: Poindexter, Cassie J, Schnell, Gary D, Sánchez-Hernández, Cornelio, Romero-Almaraz, María de Lourdes, Kennedy, Michael L, Best, Troy L, Wooten, Michael C, Waits, Juliann L
Format: Article
Language:English
Subjects:
Animal behavior
Animal populations
Animal traps
Birds
Deciduous forests
Distribution
Environmental aspects
Feature s
Forest canopy
Forests
Habitat preferences
Habitat selection
Habitats
Mammalogy
Mammals
Mice
Population biology
Reproduction
Rodents
Trees
Understory
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Summary:Osgoodomys banderanus (Osgood's deermouse) was studied in January 2006 and 2007 in north-central Colima, Mexico. During 8 nights each year, five mark-recapture grids were established with elevated and ground traps. For 16,000 trap-nights, 123 individuals were captured 385 times (comprising 9.4% of captures on grids); one-third of captures were in elevated traps. The ratio of males to females was 1.51:1 (significantly different from 1:1). No sexual dimorphism in mass was detected, 84.4% were adults, and 41.5% of adult females were pregnant or lactating. Average distance between successive captures was 19.62 m, and average distance from a central point of capture was 12.74 m. Osgoodomys banderanus was captured on 6 of 10 grids (densities 0.76–30.55 individuals/ha). Probability of capture or recapture was influenced by trapping night, with probabilities peaking on nights 6 and 7. Habitat preferences were based on 14 environmental variables taken at each trapping station. Logistic regression indicated O. banderanus preferred higher canopies, closer trees, more rocks, and less grass; a model developed with nonparametric multiplicative regression consisted of the first three of these variables. Osgoodomys banderanus exhibited strong preferences for rocky areas with less dense ground cover, a more open understory, and a tall canopy. Osgoodomys banderanus (ratón de Osgood) fue estudiado en enero de 2006 y 2007 en la zona centro-norte de Colima, México, durante ocho noches por cada año en un estudio de captura y recaptura en cuadrantes. Cada año se establecieron cinco cuadrantes con trampas arbóreas y sobre el suelo. Para 16,000 trampas-noches, 123 individuos fueron capturados 385 veces (que corresponde a 9.4% de las capturas en los cuadrantes) y una tercera parte de las capturas fueron en trampas arbóreas. La proporción macho-hembra fue 1.51:1 (significativamente diferente de 1:1). No se encontró dimorfismo sexual en peso, 84.4% fueron adultos, y 41.5% de las hembras adultas estaban preñadas o lactando. La distancia promedio entre capturas sucesivas fue de 19.62 m, y la distancia promedio desde un punto central de captura fue de 12.74 m. Osgoodomys banderanus fue capturado en 6 de 10 cuadrantes con densidades de 0.76–30.55 individuos/ha. La probabilidad de captura o recaptura fue influenciada por trampa-noche, con la mayor probabilidad entre la 6a. y 7a. noche. Preferencias de hábitat se evaluaron usando medidas de 14 variables ambientales registradas en cada esta
ISSN:0038-4909
1943-6262
DOI:10.1894/0038-4909-58.1.8