Influence of Sampling Interval on Estimates of Home-Range Size

Swihart, Robert K.; Slade, Norman A.

doi:10.2307/3801388

Cited by 346 publications

(215 citation statements)

References 23 publications

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“…Some telemetry techniques can also suffer this limitation, whereby trajectories are largely dependent on the time interval between readings (Swihart and Slade, 1985;Spencer et al, 1990). Therefore in all movement studies, a time component must be explicitly stated, for instance, the frequency of observations and the duration of the study (e.g.…”

Section: Juveniles and Adultsmentioning

confidence: 99%

Movements of Marine Fish and Decapod Crustaceans: Process, Theory and Application

Pittman

McAlpine

2003

Advances in Marine Biology

222

178

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Section: Juveniles and Adultsmentioning

confidence: 99%

Movements of Marine Fish and Decapod Crustaceans: Process, Theory and Application

Pittman

McAlpine

2003

Advances in Marine Biology

222

178

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“…Clapper rail locations were recorded using a handheld Global Positioning System (Garmin Corporation, Olathe, Kansas, USA). To minimize spatial and temporal autocorrelation of animal locations (Swihart and Slade 1985), only one location was taken per bird per high or low tide and a minimum of 12 h was allowed between consecutive locations for any given rail. This allowed a tidal event to occur which influences the birds movement, thus assuring locational independence of consecutive points.…”

Section: Home Rangementioning

confidence: 99%

Clapper rails as indicators of mercury and PCB bioavailability in a Georgia saltmarsh system

et al. 2008

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Mills, Gary L.; Garvin, N.; Stephens, Warren L. Jr.; Novak, James N.; and Brisbin, I. L. Jr., "Clapper rails as indicators of mercury and PCB bioavailability in a Georgia saltmarsh system" (2008 Abstract Clapper rails (Rallus longirostris) were used as an indicator species of estuarine marsh habitat quality because of their strong site fidelity and predictable diet consisting of mostly benthic organisms. Mercury (Hg) and the polychlorinated biphenyl (PCB) Aroclor 1268 concentrations were determined for sediments, crabs, as well as clapper rail adults and chicks collected from salt marshes associated with the LCP Superfund site in Brunswick, Georgia. Home ranges were established for adult rails, and sediment and crab samples were taken from each individual's range. The study was designed to minimize the spatial variability associated with trophic transfer studies by choosing an endpoint species with a potentially small home range and specifically sampling its foraging range. The mean home range for clapper rails was 1.2 ha with a median of 0.28 ha. Concentrations of Hg and Aroclor 1268 were shown to increase with each trophic level. Transfer factors between media followed the same pattern for both contaminants with the highest between fiddler crabs and clapper rail liver. Hg and PCB transfer factors were similar between sediment to fiddler crab and fiddler crab to muscle, however the PCB transfer factor from fiddler crabs to liver was over twice as large as for Hg. PCB congener profiles did not significantly differ between media types.

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“…The estimation procedure has been problematic because of three factors: (1) the distribution is two-dimensional, (2) observed utilization distributions rarely conform to parametric models, and (3) observations are sequential locations of an individual animal and often may not be independent observations of the true distribution (Swihart and Slade 1985).…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of the Accuracy of Kernel Density Estimators for Home Range Analysis

Seaman¹,

Powell²

1996

Ecology

1,335

976

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Abstract. Kernel density estimators are becoming more widely used, particularly as h?I?e range estimators. Despite extensive interest in their theoretical properties, little empmcal research has been done to investigate their performance as home range estimators. We used computer simulations to compare the area and shape of kernel density estimates to the true area and shape of multimodal two-dimensional distributions. The fixed kernel gave area estimates with very little bias when least squares cross validation was used to se_lect the smoothing parameter. The cross-validated fixed kernel also gave surface estimates with the lowest error. The adaptive kernel overestimated the area of the distribution and had higher error associated with its surface estimate.

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Influence of Sampling Interval on Estimates of Home-Range Size

Cited by 346 publications

References 23 publications

Movements of Marine Fish and Decapod Crustaceans: Process, Theory and Application

Movements of Marine Fish and Decapod Crustaceans: Process, Theory and Application

Clapper rails as indicators of mercury and PCB bioavailability in a Georgia saltmarsh system

An Evaluation of the Accuracy of Kernel Density Estimators for Home Range Analysis

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