Literaturdatenbank

WIKINDX Resources

Riedle, D. J., & Averill-Murray, R. C. , Movement ecology of gopherus morafkai - abstract. Unpublished paper presented at Program and Abstracts of the Tenth Annual Symposium on the Conservation and Biology of Tortoises and Freshwater Turtles. 
Added by: Sarina Wunderlich (06 Jul 2014 16:17:17 UTC)
Resource type: Conference Paper
BibTeX citation key: Riedle2013
View all bibliographic details
Categories: General
Keywords: Actinemys marmorata, Emydidae, Habitat - habitat, Nordamerika - North America, Schildkröten - turtles + tortoises
Creators: Averill-Murray, Riedle
Collection: Program and Abstracts of the Tenth Annual Symposium on the Conservation and Biology of Tortoises and Freshwater Turtles
Views: 4/643
Views index: 18%
Popularity index: 4.5%
Abstract     
Testudinidae Most, if not all long-term studies on chelonians focus primarily on variance of demographic traits over time, with few to no studies looking at spatial aspects of turtle ecology. We investigated spatial extent of habitat use for Gopherus morafkai in central Arizona. We tracked 18 tortoises for 8 years at Sugarloaf Mountain, Maricopa County, Arizona. We calculated 100% and 50% minimum convex polygons (MCP) for each tortoise on a sequential annual basis (y1, y1+y2, y1+y2+y3). Sequential home range estimates for the 100% MCPs increased with the inclusion of each additional year. Sequential home range estimates for the 50% MCPs showed a slight decrease in size over time. The stabilization of the 50% MCP home ranges can be explained by the subsequent weighting of the arithmetic center of an individual tortoise’s home range by repeated use of select shelter sites. Males utilized 12–22 unique shelter sites and females 15–46 unique shelter sites throughout the duration of the study. Of those shelters, 55% of male locations and 38% of female locations were recorded at a single shelter. To determine how tortoises selected shelter sites we developed two ordination models using Canonical Correspondence Analysis to elucidate patterns of shelter-site use based on sex and reproductive condition, and season. Females tended to be generalists in terms of shelter site selection, while males tended to use deeper shelters. Gravid females preferred burrows with loose soil for nest construction. Winter shelters tended to be west-facing, while tortoises used much deeper burrows during hotter, drier times of year.
Added by: Sarina Wunderlich  
wikindx 4.2.2 ©2014 | Total resources: 14930 | Database queries: 53 | Script execution: 0.25185 secs | Style: American Psychological Association (APA) | Bibliography: WIKINDX Master Bibliography