Clumping and Consistency in Primates’ Patterns of Range Use: Definitions, Sampling, Assessment and Applications

Rasmussen, Dennis R.

doi:10.1159/000155950

Cited by 57 publications

(12 citation statements)

References 43 publications

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“…One disadvantage of equations 1-3 is that 2 separate measures are required to quantify overlap rather than a single (nondirectional) measure that reflects the degree of similarity in the 2 animals' UDs. Alternatively, Rasmussen (1980) suggested applying Spearman's correlation coefficient (Zar 1996), r s , to nonparametric estimates of the UDs obtained using a grid cell method (White and Garrott 1990). Kernohan et al (2001) discussed some of the limitations of this approach.…”

Section: Indices Of Overlapmentioning

confidence: 99%

Quantifying Home-Range Overlap: The Importance of the Utilization Distribution

Fieberg

Kochanny

2005

Journal of Wildlife Management

756

673

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The concept of an animal's home range has evolved over time, as have methods for estimating home-range size and shape. Recently, home-range estimation methods have focused on estimating an animal's utilization distribution (UD; i.e., the probability distribution defining the animal's use of space). We illustrate the importance of the utilization distribution in characterizing the degree of overlap between home ranges (e.g., when assessing site fidelity or space-use sharing among individuals). We compare several different statistics for their ability to accurately rank paired examples in terms of their degree of overlap. These examples illustrate limitations of indices commonly used to quantify home-range overlap and suggest that new overlap indices that are a function of the UD are likely to be more informative. We suggest 2 new statistics for measuring home-range overlap: (1) for a measure of spaceuse sharing, we suggest a generalization of Hurlbert's (1978) E/E uniform statistic, which we term the utilization distribution overlap index (UDOI), and (2) for a general measure of similarity between UD estimates, we suggest Bhattacharyya's affinity (BA;Bhattacharyya 1943). Using a short simulation study, we found that overlap indices can accurately rank pairs of UDs in terms of the extent of overlap, but estimates of overlap indices are likely to be biased. The extent of the bias depended on sample size and the degree of overlap (UDs with a high degree of overlap resulted in statistics that were more biased [low]), suggesting that comparisons across studies may be problematic. We illustrate the use of overlap indices to quantify the degree of similarity among UD estimates obtained using 2 different data collection methods (Global Positioning Systems [GPS] and very high frequency [VHF] radiotelemetry) for an adult female northern white-tailed deer (Odocoileus virginianus) in north-central Minnesota. JOURNAL OF WILDLIFE MANAGEMENT 69(4):1346-1359; 2005

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Section: Indices Of Overlapmentioning

confidence: 99%

Quantifying Home-Range Overlap: The Importance of the Utilization Distribution

Fieberg

Kochanny

2005

Journal of Wildlife Management

756

673

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“…Distribution and abundance of resources have been reported as environmental factors influencing range use of other primates (Altmann and Altmann, 1970;Clutton-Brock, 1977;Rasmussen, 1980;Strier, 1987;Kaplin, 2001). Similarly, Turner (2000) found that food distribution might be the key element determining how chimpanzees in the semi-evergreen gallery forest of Kasoje at Mahale (Tanzania) utilize their home range.…”

Section: Habitat Preference and Fruit Availabilitymentioning

confidence: 99%

Ranging Patterns of Chimpanzees in a Montane Forest of Kahuzi, Democratic Republic of Congo

Basabose

2005

Int J Primatol

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I studied ranging patterns of a semihabituated unit-group of chimpanzees for 60 mo at Kahuzi. They had a total home range of 12.81 km 2 and a mean annual home range of 7.55 km 2 . Considering the low density of chimpanzees in the area vis-à-vis chimpanzees in arid areas, their home range is very small. Kahuzi chimpanzees used the home range in a clumped pattern, frequently visiting the core area and only rarely entering peripheral areas. The monthly range changes with fruit availability, increasing during periods of fruit scarcity. There was no consistent seasonal difference in the size of the home range. However, use of different habitat types may vary seasonally. While there was no seasonal effect in the use of primary forest, the chimpanzees showed a statistically consistent seasonal difference in their use of secondary forest, visiting it mainly during the dry season when fig trees were in fruit. Since the primary forest provides them with more food fruits, chimpanzees tended to use more frequently the small patches of primary forest in their home range. Thus, the size and distribution of small fragmented primary forests may be an important factor influencing the ranging pattern of chimpanzees at Kahuzi.

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“…The use of different height classes during feeding activity was calculated as weighted averages, because sample sizes were different for each height class [25], Home range size was determined by summing all the lozenges utilized by the tamarins during the study [26], The patterns of range use were quantified by recording the occupation of each lozenge at the end of each instantaneous scan sample [27],…”

Section: Observationsmentioning

confidence: 99%

Feeding Ecology of Saguinus bicolor bicolor (Callitrichidae: Primates) in a Relict Forest in Manaus, Brazilian Amazonia

Egler

1992

IJFP

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This study is part of a long-term ecological study of habitat and dietary requirements of the pied bare-face tamarin (Saguinus bicolor bicolor). One group was studied for 11 months in an area of secondary forest in a suburb of Manaus, Amazonas, Brazil. Three main vegetation types occurred inside the group’s home range (12 ha): capoeira, older secondary forest and campinarana (white sand forest). The tamarins ate fruits (21 species), flowers (1 species), exudates (4 species), and arthropods (insects and spiders). They spent 14.3% of total activity time seeking and eating animal prey, and 9.9% feeding on plant material, mostly fruits. In general, fruits consumed were ripe, small and succulent. Trees used for feeding were low and had small crown diameters. Three plant species (Protium aracouchinni, Myrcia cf. fallax, and Couma utilis) were used intensively during the three seasons covered by the study period. The concentrated use of 3 fruit species, each for an extended period (one fruiting species per season), provided the tamarins with a regular food supply. Tamarins consumed exudates from holes in the bark of trees of the families Anacardiaceae and Vochysiaceae, as well as gum exuded from seed pods of Mimosaceae. Exudates were exploited during the dry season and at the beginning of the wet season. Group travel was primarily based on routes connecting the fruiting trees exploited, with foraging for animal prey occurring during travel. Tamarins searched for arthropods on trunks, branches and leaves and in trunk holes. The foraging and feeding tactics displayed by S. b. bicolor are closely linked to morphological characteristics (small size and weight, claw-like nails) that allowed access to energy-rich resources (arthropods and plant exudates) in different strata of the vegetation.

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Clumping and Consistency in Primates’ Patterns of Range Use: Definitions, Sampling, Assessment and Applications

Cited by 57 publications

References 43 publications

Quantifying Home-Range Overlap: The Importance of the Utilization Distribution

Quantifying Home-Range Overlap: The Importance of the Utilization Distribution

Ranging Patterns of Chimpanzees in a Montane Forest of Kahuzi, Democratic Republic of Congo

Feeding Ecology of Saguinus bicolor bicolor (Callitrichidae: Primates) in a Relict Forest in Manaus, Brazilian Amazonia

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