The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Filippo Aureli - One of the best experts on this subject based on the ideXlab platform.
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Site Fidelity in space use by spider monkeys (Ateles geoffroyi) in the Yucatan peninsula, Mexico.
PLoS ONE, 2013Co-Authors: Gabriel Ramos-fernández, Colleen M. Schaffner, Laura G. Vick, Sandra E. Smith Aguilar, Filippo AureliAbstract:Animal home ranges may vary little in their size and location in the short term but nevertheless show more variability in the long term. We evaluated the degree of Site Fidelity of two groups of spider monkeys (Ateles geoffroyi) over a 10- and 13-year period, respectively, in the northeastern Yucatan peninsula, Mexico. We used the Local Convex Hull method to estimate yearly home ranges and core areas (defined as the 60% probability contour) for the two groups. Home ranges varied from 7.7 to 49.6 ha and core areas varied from 3.1 to 9.2 ha. We evaluated the degree of Site Fidelity by quantifying the number of years in which different areas were used as either home ranges or core areas. Large tracts were used only as home ranges and only for a few years, whereas small areas were used as either core area or home range for the duration of the study. The sum of the yearly core areas coincided partially with the yearly home ranges, indicating that home ranges contain areas used intermittently. Home ranges, and especially core areas, contained a higher proportion of mature forest than the larger study Site as a whole. Across years and only in one group, the size of core areas was positively correlated with the proportion of adult males in the group, while the size of home ranges was positively correlated with both the proportion of males and the number of tree species included in the diet. Our findings suggest that spider monkey home ranges are the result of a combination of long-term Site Fidelity and year-to-year use variation to enable exploration of new resources.
Laura G. Vick - One of the best experts on this subject based on the ideXlab platform.
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Site Fidelity in Space Use by Spider Monkeys (Ateles geoffroyi) in the Yucatan Peninsula, Mexico
2016Co-Authors: Gabriel Ramos-fern, Colleen M. Schaffner, Ra Smith E. Aguilar, Laura G. VickAbstract:Animal home ranges may vary little in their size and location in the short term but nevertheless show more variability in the long term. We evaluated the degree of Site Fidelity of two groups of spider monkeys (Ateles geoffroyi) over a 10- and 13-year period, respectively, in the northeastern Yucatan peninsula, Mexico. We used the Local Convex Hull method to estimate yearly home ranges and core areas (defined as the 60 % probability contour) for the two groups. Home ranges varied from 7.7 to 49.6 ha and core areas varied from 3.1 to 9.2 ha. We evaluated the degree of Site Fidelity by quantifying the number of years in which different areas were used as either home ranges or core areas. Large tracts were used only as home ranges and only for a few years, whereas small areas were used as either core area or home range for the duration of the study. The sum of the yearly core areas coincided partially with the yearly home ranges, indicating that home ranges contain areas used intermittently. Home ranges, and especially core areas, contained a higher proportion of mature forest than the larger study Site as a whole. Across years and only in one group, the size of core areas was positively correlated with the proportion of adult males in the group, while the size of home ranges was positively correlated with both the proportion of males and the number of tree species included in the diet. Our findings suggest that spider monkey home ranges are th
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Site Fidelity in space use by spider monkeys (Ateles geoffroyi) in the Yucatan peninsula, Mexico.
PLoS ONE, 2013Co-Authors: Gabriel Ramos-fernández, Colleen M. Schaffner, Laura G. Vick, Sandra E. Smith Aguilar, Filippo AureliAbstract:Animal home ranges may vary little in their size and location in the short term but nevertheless show more variability in the long term. We evaluated the degree of Site Fidelity of two groups of spider monkeys (Ateles geoffroyi) over a 10- and 13-year period, respectively, in the northeastern Yucatan peninsula, Mexico. We used the Local Convex Hull method to estimate yearly home ranges and core areas (defined as the 60% probability contour) for the two groups. Home ranges varied from 7.7 to 49.6 ha and core areas varied from 3.1 to 9.2 ha. We evaluated the degree of Site Fidelity by quantifying the number of years in which different areas were used as either home ranges or core areas. Large tracts were used only as home ranges and only for a few years, whereas small areas were used as either core area or home range for the duration of the study. The sum of the yearly core areas coincided partially with the yearly home ranges, indicating that home ranges contain areas used intermittently. Home ranges, and especially core areas, contained a higher proportion of mature forest than the larger study Site as a whole. Across years and only in one group, the size of core areas was positively correlated with the proportion of adult males in the group, while the size of home ranges was positively correlated with both the proportion of males and the number of tree species included in the diet. Our findings suggest that spider monkey home ranges are the result of a combination of long-term Site Fidelity and year-to-year use variation to enable exploration of new resources.
Gabriel Ramos-fernández - One of the best experts on this subject based on the ideXlab platform.
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Site Fidelity in space use by spider monkeys (Ateles geoffroyi) in the Yucatan peninsula, Mexico.
PLoS ONE, 2013Co-Authors: Gabriel Ramos-fernández, Colleen M. Schaffner, Laura G. Vick, Sandra E. Smith Aguilar, Filippo AureliAbstract:Animal home ranges may vary little in their size and location in the short term but nevertheless show more variability in the long term. We evaluated the degree of Site Fidelity of two groups of spider monkeys (Ateles geoffroyi) over a 10- and 13-year period, respectively, in the northeastern Yucatan peninsula, Mexico. We used the Local Convex Hull method to estimate yearly home ranges and core areas (defined as the 60% probability contour) for the two groups. Home ranges varied from 7.7 to 49.6 ha and core areas varied from 3.1 to 9.2 ha. We evaluated the degree of Site Fidelity by quantifying the number of years in which different areas were used as either home ranges or core areas. Large tracts were used only as home ranges and only for a few years, whereas small areas were used as either core area or home range for the duration of the study. The sum of the yearly core areas coincided partially with the yearly home ranges, indicating that home ranges contain areas used intermittently. Home ranges, and especially core areas, contained a higher proportion of mature forest than the larger study Site as a whole. Across years and only in one group, the size of core areas was positively correlated with the proportion of adult males in the group, while the size of home ranges was positively correlated with both the proportion of males and the number of tree species included in the diet. Our findings suggest that spider monkey home ranges are the result of a combination of long-term Site Fidelity and year-to-year use variation to enable exploration of new resources.
John Y Takekawa - One of the best experts on this subject based on the ideXlab platform.
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stable isotopes suggest low Site Fidelity in bar headed geese anser indicus in mongolia implications for disease transmission
Waterbirds, 2015Co-Authors: Eli S Bridge, John Y Takekawa, Jeffrey F Kelly, Xiangming Xiao, Nyambayar Batbayar, Tseveenmyadag Natsagdorj, Nichola J Hill, Lucy A Hawkes, Charles M BishopAbstract:Population connectivity is an important consideration in studies of disease transmission and biological conservation, especially with regard to migratory species. Determining how and when different subpopulations intermingle during different phases of the annual cycle can help identify important geographical regions or features as targets for conservation efforts and can help inform our understanding of continental-scale disease transmission. In this study, stable isotopes of hydrogen and carbon in contour feathers were used to assess the degree of molt-Site Fidelity among Bar-headed Geese (Anser indicus) captured in north-central Mongolia. Samples were collected from actively molting Bar-headed Geese (n = 61), and some individual samples included both a newly grown feather (still in sheath) and an old, worn feather from the bird's previous molt (n = 21). Although there was no difference in mean hydrogen isotope ratios for the old and new feathers, the isotopic variance in old feathers was approximately three times higher than that of the new feathers, which suggests that these birds use different and geographically distant molting locations from year to year. To further test this conclusion, online data and modeling tools from the isoMAP webSite were used to generate probability landscapes for the origin of each feather. Likely molting locations were much more widespread for old feathers than for new feathers, which supports the prospect of low molt-Site Fidelity. This finding indicates that population connectivity would be greater than expected based on data from a single annual cycle, and that disease spread can be rapid even in areas like Mongolia where Bar-headed Geese generally breed in small isolated groups.
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wintering Site Fidelity and movement patterns of western sandpipers calidris mauri in the san francisco bay estuary
Ibis, 2008Co-Authors: Sarah E Warnock, John Y TakekawaAbstract:Western Sandpipers Calidris mauri are the most numerous shorebird species in the San Francisco Bay estuary during winter. A sample of 106 Western Sandpipers was captured in mist nets and radio-marked with 1-g transmitters to examine their wintering Site Fidelity and movements. Differences in distances moved, home range extent and core area size were examined by age, sex, season, Site, time of day and tide. All birds remained in the south San Francisco Bay region during winter and exhibited strong Site Fidelity, with a mean home range of 22.0 km2 or only 8% of the study area. First-year birds had larger home ranges (26.6 ± 3.6 km2) than adults (17.2 ± 2.5 km2) in winter, but home range sizes of males and females were not significantly different in any period. Home range sizes were similar between seasons, but core areas were smaller in spring (6.3 ± 1.2 km2) than in early (9.6 ± 4.0 km2) or late (11.6 ± 1.6 km2) winter. Movements and home range size were similar for radio-marked birds located during day and night. The high degree of regional and local Site Fidelity demonstrated that the mixture of natural mud fiats and artificial salt ponds in southern San Francisco Bay provided sufficient resources for large wintering populations of Western Sandpipers.
Colleen M. Schaffner - One of the best experts on this subject based on the ideXlab platform.
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Site Fidelity in Space Use by Spider Monkeys (Ateles geoffroyi) in the Yucatan Peninsula, Mexico
2016Co-Authors: Gabriel Ramos-fern, Colleen M. Schaffner, Ra Smith E. Aguilar, Laura G. VickAbstract:Animal home ranges may vary little in their size and location in the short term but nevertheless show more variability in the long term. We evaluated the degree of Site Fidelity of two groups of spider monkeys (Ateles geoffroyi) over a 10- and 13-year period, respectively, in the northeastern Yucatan peninsula, Mexico. We used the Local Convex Hull method to estimate yearly home ranges and core areas (defined as the 60 % probability contour) for the two groups. Home ranges varied from 7.7 to 49.6 ha and core areas varied from 3.1 to 9.2 ha. We evaluated the degree of Site Fidelity by quantifying the number of years in which different areas were used as either home ranges or core areas. Large tracts were used only as home ranges and only for a few years, whereas small areas were used as either core area or home range for the duration of the study. The sum of the yearly core areas coincided partially with the yearly home ranges, indicating that home ranges contain areas used intermittently. Home ranges, and especially core areas, contained a higher proportion of mature forest than the larger study Site as a whole. Across years and only in one group, the size of core areas was positively correlated with the proportion of adult males in the group, while the size of home ranges was positively correlated with both the proportion of males and the number of tree species included in the diet. Our findings suggest that spider monkey home ranges are th
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Site Fidelity in space use by spider monkeys (Ateles geoffroyi) in the Yucatan peninsula, Mexico.
PLoS ONE, 2013Co-Authors: Gabriel Ramos-fernández, Colleen M. Schaffner, Laura G. Vick, Sandra E. Smith Aguilar, Filippo AureliAbstract:Animal home ranges may vary little in their size and location in the short term but nevertheless show more variability in the long term. We evaluated the degree of Site Fidelity of two groups of spider monkeys (Ateles geoffroyi) over a 10- and 13-year period, respectively, in the northeastern Yucatan peninsula, Mexico. We used the Local Convex Hull method to estimate yearly home ranges and core areas (defined as the 60% probability contour) for the two groups. Home ranges varied from 7.7 to 49.6 ha and core areas varied from 3.1 to 9.2 ha. We evaluated the degree of Site Fidelity by quantifying the number of years in which different areas were used as either home ranges or core areas. Large tracts were used only as home ranges and only for a few years, whereas small areas were used as either core area or home range for the duration of the study. The sum of the yearly core areas coincided partially with the yearly home ranges, indicating that home ranges contain areas used intermittently. Home ranges, and especially core areas, contained a higher proportion of mature forest than the larger study Site as a whole. Across years and only in one group, the size of core areas was positively correlated with the proportion of adult males in the group, while the size of home ranges was positively correlated with both the proportion of males and the number of tree species included in the diet. Our findings suggest that spider monkey home ranges are the result of a combination of long-term Site Fidelity and year-to-year use variation to enable exploration of new resources.
