Demographic features, distribution, and habitat selection of the gray mouse opossum (Tlacuatzin canescens) in Colima, Mexico

• Autorzy: Kennedy M. L. , Schnell G. D. , Romero-Almarez M. d. L. , Malakouti B. S. , Sanchez-Hernandez C. , Best T. L. , Wooten M. C.
• Języki publikacji: EN

Abstrakty

EN

In western Mexico, gray mouse opossums Tlacuatzin canescens typically are not only in tropical deciduous and semideciduous woodlands but also in croplands and orchards. We conducted mark-recapture studies in January 2003–2007 and 2010 in coastal, northern, and central Colima, Mexico. Each year, five grids, established in areas of thick vegetation within a mosaic of habitats, had 100 stations (10 × 10), each with two Sherman traps, one on the ground and another elevated 1–2 m. On 24 of 30 grids, 82 individuals were captured 126 times (85.7 % in elevated traps). Sex ratio did not deviate from 1:1; there was no sexual dimorphism in mass (average for males, 28.21 g; average for females, 25.64 g); 46.3 % of animals were adults, 27.3 % of adult females were reproductively active, and 77.5 % of males had scrotal testes. Distance from centroid of trap locations averaged 15.24 m, with mean minimum distance moved between captures being 33.19 m. Densities usually were low (0.67–8.03/ha), with the species widespread in habitats studied. We assessed 14 environmental characteristics for each station using ANOVA, logistic regression, and nonparametric multiplicative regression (NPMR) to characterize habitat selection. T. canescens was more likely found where percent grass was about 30 % and litter over 50 %, with height of canopy less than 10 m and about 40 % closed. NPMR, being able to recognize hump-shaped response curves where intermediate variable values are preferred, identified two variables (percent grass and percent canopy closed) not detected by other techniques as important in characterizing habitat selection of T. canescens.

Słowa kluczowe

EN

demographic feature; distribution; habitat selection; gray mouse opossum; Tlacuatzin canescens; opossum; Colima state; Mexico

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 2013
• Tom: 58
• Numer: 3
• Opis fizyczny: p.285-298,fig.,ref.

Twórcy

autor

Kennedy M. L.

• Ecological Research Center, Department of Biological Sciences, University of Memphis, Memphis 38152, USA

autor

Schnell G. D.

• Sam Noble Oklahoma Museum of Natural History and Department of Biology, University of Oklahoma, 2401 Chautauqua Avenue, Norman, OK 73072, USA

autor

Romero-Almarez M. d. L.

• Escuinapa No. 92 bis. Col, Pedregal de Santo Domingo, 04369, Mexico, DF, Mexico

autor

Malakouti B. S.

• Sam Noble Oklahoma Museum of Natural History and Department of Biology, University of Oklahoma, 2401 Chautauqua Avenue, Norman, OK 73072, USA

autor

Sanchez-Hernandez C.

• Departamento de Zoologia, Instituto de Biologia, Universidad Nacional Autonoma de Mexico, A.P. 70-153, 04510 Del. Coyoacan, Mexico, DF, Mexico

autor

Best T. L.

• Department of Biological Sciences, Auburn University, 331 Funchess Hall, AL.36849 Auburn, USA

autor

Wooten M. C.

• Department of Biological Sciences, Auburn University, 331 Funchess Hall, AL.36849 Auburn, USA

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Identyfikatory

DOI

10.1007/s13364-012-0117-6