Eliminating autocorrelation reduces biological relevance of home range estimates

Solla, Shane R. de; Bonduriansky, Russell; Brooks, Ronald J.

doi:10.1046/j.1365-2656.1999.00279.x

Cited by 476 publications

(334 citation statements)

References 28 publications

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“…Although successive locations of an animal may be auto-correlated, they can be used in home range calculations if there are several trackingnights per home range (Smith et al 1981) and the time interval between successive locations is relatively constant (de Solla et al 1999). Our data fulfilled these criteria.…”

Section: Datamentioning

confidence: 80%

Landscape Features, Home-Range Size and Density of Northern Badgers (Meles meles)

Kauhala¹,

Holmala²

2011

Annales Zoologici Fennici

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Section: Datamentioning

confidence: 80%

Landscape Features, Home-Range Size and Density of Northern Badgers (Meles meles)

Kauhala¹,

Holmala²

2011

Annales Zoologici Fennici

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“…Kernel densities do not require serial independence of observations when estimating foraging ranges (de Solla et al 1999). Density contours corresponding to kernels were calculated for locations in a Lambert Equal-Area Azimuthal Projection centred on the South Pole.…”

Section: Methodsmentioning

confidence: 99%

Flexible foraging behaviour of a sexually dimorphic seabird: large males do not always dive deep

Quillfeldt¹,

Schroff²,

Noordwijk³

et al. 2011

Mar. Ecol. Prog. Ser.

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Sex differences in foraging behaviour have been explained by size dimorphism and/or avoidance of inter-sexual competition for depletable resources. To distinguish between these 2 hypotheses, we examined how intrinsic factors (sex-related differences) and extrinsic factors (year differences) shape the foraging behaviour of size-dimorphic imperial shags Phalacrocorax atriceps albiventer breeding at New Island, Falkland Islands/Islas Malvinas. We deployed time-depth and compass loggers to male and female imperial shags over 3 consecutive chick-feeding seasons. Males and females partly overlapped in coastal foraging areas, which were used mainly for benthic diving. Males additionally used offshore areas over deep water for shallow pelagic diving, suggesting that spatial segregation is involved in the avoidance of inter-sexual competition for food. Stable isotope data suggested differences in prey composition between the sexes, with consistently higher trophic levels in males, as expected for their larger size. Males were 27% heavier than females and reached greater maximum dive depths (98.9 ± 5.3 m) than females (54.1 ± 2.9 m). However, contrary to predictions based on body size dimorphism, the median dive depths of males were similar to those of females. While females used mainly benthic diving, males were more flexible in their benthic and pelagic foraging behaviour. Females also carried out more dives per day in all years, and deeper and longer dives than males in one year. As dive parameters differed strongly among the years, our results suggest that body size dimorphism and the avoidance of inter-sexual competition for food are involved in the evolution of sex-related differences in foraging in this species.

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“…We sub-sampled location data to every 4 h to standardize location sampling across the duration of the study (Gese et al 1990;White and Garrott 1990). The 4-h sampling scheme also reduced temporal autocorrelation (Swihart and Slade 1985a, b), though temporally autocorrelated data may provide better estimates of home range sizes and other movement measures (Aebischer et al 1993;de Solla et al 1999;Fieberg 2007) when the animal is the sample unit rather than individual observations (Kenward 1992;Otis and White 1999). Because coyote pack members used nearly identical areas, we defined the sample unit as a coyote pack to avoid pseudoreplication.…”

Section: Animal Capturementioning

confidence: 99%

Space use and social ecology of coyotes (Canis latrans) in a high-elevation ecosystem: relative stability in a changing environment

Gifford

Gese

Parmenter³

2016

J Ethol

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Coyote (Canis latrans) spatial and social ecology are variable, but have been little studied in high-elevation environments. In these temperate ecosystems, large ungulates are prevalent and coyote pack size may be large in order for them to scavenge and defend ungulate carcasses from conspecifics in neighboring packs. We initiated a study to understand the spatial and social ecology of coyotes on the Valles Caldera National Preserve, a high-elevation (2450-3400 m) protected area in northern New Mexico. Our objectives were to (1) describe the home range size and habitat use of coyotes in the preserve, (2) describe coyote movements within and outside of packs, and (3) to evaluate the relationship between coyote social cohesion and the amount of elk (Cervus elaphus) in the coyote diet. We acquired global positioning system and telemetry locations from 33 coyotes from August 2005 to July 2009. We classified 23 coyotes (70 % of individuals) as residents (i.e., territorial) during at least part of the study and ten coyotes (30 %) as transients. Overall mean home range size of resident packs was 10.6 ± 2.2 (SD) km 2 . Home range size varied between packs, but did not vary by season or year. Coyotes used dry and wet meadow habitats as expected based on availability; coyotes used riparian habitat more than expected, and forests less than expected. Social cohesion did not vary among biological seasons. Alpha coyotes were more socially cohesive with each other than with other pack members, and a transient exhibited temporal-spatial avoidance of pack members while inside the pack's territory followed by integration into the pack. Contrary to expectations, we found no relationship between coyote social cohesion and the proportion of elk in coyote diets. We concluded that coyote space use and sociality on the preserve were relatively stable year-round despite changes in biological needs, snow depth, and utilization of variously sized prey.

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Eliminating autocorrelation reduces biological relevance of home range estimates

Cited by 476 publications

References 28 publications

Landscape Features, Home-Range Size and Density of Northern Badgers (Meles meles)

Landscape Features, Home-Range Size and Density of Northern Badgers (Meles meles)

Flexible foraging behaviour of a sexually dimorphic seabird: large males do not always dive deep

Space use and social ecology of coyotes (Canis latrans) in a high-elevation ecosystem: relative stability in a changing environment

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