Ranging Behavior, Group Size and Behavioral Flexibility in Ethiopian Hamadryas Baboons (Papio hamadryas hamadryas)

Swedell, Larissa

doi:10.1159/000064787

Cited by 90 publications

(79 citation statements)

References 17 publications

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“…On the other hand, social relationships between females within the same harem do not appear to be as dependent on kinship as in gelada baboons. These comparisons are only tentative because Guinea baboons have so far been mostly studied in captivity and because recent studies of new wild populations of gelada and hamadryas baboons have suggested that the social organization of these species is more variable than previously thought [Mori et al, 1999;Swedell, 2002aSwedell, , 2002b. More field studies of these 3 spe-cies are needed to fully understand the similarities and differences in their mating system and social organization and explain them on the basis of their phylogenetic history and ecological adaptations.…”

Section: Discussionmentioning

confidence: 98%

One-Male Harems and Female Social Dynamics in Guinea Baboons

Maestripieri

Mayhew²,

Carlson³

et al. 2006

IJFP

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Little is known about the mating system and social organization of Guinea baboons. This study investigated whether Guinea baboons have a harem-based mating system similar to that of hamadryas and gelada baboons and whether one-male mating units also correspond to social units. Ten adult females in a captive multi-male multi-female group of Guinea baboons were focally observed 2 h per week for 12 weeks, and all observed copulations within the group were recorded. Some males copulated with a single female while others had harems of 2–4 females. All females copulated with a single male except 1 female that switched harems early in the study. The focal females had higher rates of social interaction with their harem members, especially their harem male, than with individuals outside the harem. Females appeared to be subordinate to the harem male but little or no physical aggression or herding behavior from the male was observed. Variation in female social interactions within the harem was not accounted for by their sexual interactions with the male or their genetic relatedness with the females. Females, however, appeared to maintain social relationships with their female relatives in other harems. Taken together, the results of this study show that both mating and affiliative interactions in Guinea baboons are concentrated within one-male units and that the social dynamics within and between these units share some similarities as well as differences with those of hamadryas and gelada baboons.

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Section: Discussionmentioning

confidence: 98%

One-Male Harems and Female Social Dynamics in Guinea Baboons

Maestripieri

Mayhew²,

Carlson³

et al. 2006

IJFP

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“…Its unusual multilevel social system and male-dominated social organization are commonly thought to be evolutionary adaptations to the semi-desert environment in which it likely evolved, either in the Horn of Africa eral habitat types but is predominantly a semi-desert scrubland dominated by shrubby Acacia and Grewia [Swedell, 2002b;Abule et al, 2007] broadly similar to the habitat of hamadryas baboons in other parts of their geographic range [Sigg and Stolba, 1981;Biquand et al, 1992]. Other habitat types within the range of the Filoha population include grasslands and swamps dominated by Sporobolus and Cyperus grasses and small forests of doum palm trees (H. thebaica) .…”

Section: Introductionmentioning

confidence: 99%

“…The two wettest months of the year are usually July and August, and the driest and hottest months of the year are usually May and June, just prior to the onset of the long rains [Swedell, 2002b[Swedell, , 2006. The annual rainfall is 500-600 mm, with the vast majority of this falling during July and August ( table 1 ).…”

Section: Introductionmentioning

confidence: 99%

Composition and Seasonality of Diet in Wild Hamadryas Baboons: Preliminary Findings from Filoha

Swedell¹,

Hailemeskel²,

Schreier³

2008

IJFP

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Here we report the first year-round quantitative data on dietary composition and seasonality in wild hamadryas baboons. Study subjects were adult male members of band 3 at the Filoha field site in central lowland Ethiopia. Data collection consisted of 10-min focal samples during all-day follows 4–6 days per month over the course of 1 year. The two largest contributors to the diet were Hyphaene thebaica and Acacia senegal, and these were the only plant species found in the diet during every month of the year. Other relatively major contributors to the diet, such as Cyperus grandibulbosus, Seddera bagshawei, Tribulus cistoides and Typhalatifolia, showed a seasonal pattern. Fewer plant species were consumed during the dry months of the year compared to the wet months. During the hottest and driest months of the year, study subjects subsisted almost exclusively on H. thebaica, A. senegal, C. grandibulbosus and T.latifolia. Overall, these patterns suggest that this population of hamadryas baboons spends less time feeding and is able to subsist on a narrower array of plant foods compared to other baboons. This pattern may be driven by the presence at Filoha of the doum palm (H. thebaica), a high-quality food resource that is consumed year-round.

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“…These ranging and social patterns have often been attributed to the scarce and widely dispersed distribution of food resources in their semi-desert habitats (Kummer 1968;Sigg & Stolba 1981;Swedell 2002Swedell , 2006Schreier 2010;Schreier & Swedell 2012a). Hamadryas Baboons rely on Acacia species for subsistence throughout their range (Kummer 1968;Nagel 1973;Kummer et al 1981;Al-Safadi 1994;Schreier 2010).…”

Section: Introductionmentioning

confidence: 99%