Primatology comes of age: 2002 AAPA Luncheon address

Strier, Karen B.

doi:10.1002/ajpa.10383

Cited by 28 publications

(20 citation statements)

References 63 publications

(59 reference statements)

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“…The possibility to use a comparative approach was invaluable in trying to disentangle the speciesspecific role underlying these processes. Researchers now widely accept the idea that analysis at the specific level is extremely important before attempting interspecific generalizations (Maestripieri, 1994;Strier, 2003). This approach enabled us to confirm some of the most important findings that previous works have pointed out, and, at the same time, to provide a working hypothesis able to specify the independent but integrated roles played by maternal stress, maternal responsiveness, maternal rejection, and time in contact, on infant behavioral development.…”

Section: Discussionsupporting

confidence: 55%

Maternal behavior and maternal stress are associated with infant behavioral development in macaques

Bardi

Huffman

2005

Developmental Psychobiology

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The simultaneous effects of naturally occurring individual differences in maternal care and maternal peripartum stress on infant development have been sparsely reported in nonhuman primates. In this work, we used a comparative approach to assess how changes in peripartum maternal excreted cortisol levels and the quality of mother-infant interactions correlate with infant behavioral development in group-living rhesus and Japanese macaques. We tested the hypothesis that peripartum maternal stress was associated with infant behavioral characteristics during development. Due to the difference in mothering style between the two species, we provided separated analyses for two groups. A sample of mother-infant pairs (Japanese macaques, N = 14; rhesus macaques, N = 10) was observed during the first 3 months of the infant's life. Follow-up observations (at 5, 7, and 9 months of age) were collected for the infants. Maternal cortisol levels were measured during the peripartum period. We found preliminary evidence that maternal peripartum stress and differences in key components of maternal behavior are associated with infant behavior throughout the developmental phase. We also provided a working hypothesis regarding maternal behavior and maternal stress as factors playing unique roles in different components of infant behavioral development.

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Section: Discussionsupporting

confidence: 55%

Maternal behavior and maternal stress are associated with infant behavioral development in macaques

Bardi

Huffman

2005

Developmental Psychobiology

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“…Our results suggest that although the energetic costs of reproduction in female northern muriquis may differ over their 3-year birth interval (STRIER 1999b(STRIER , 2003, their energy budgets may be similar for different reasons (Fig. 3).…”

Section: Discussionmentioning

confidence: 80%

Energetic costs of reproduction in female northern muriquis, Brachyteles hypoxanthus (Primates: Platyrrinhi: Atelidae)

Colares¹,

Young²,

Strier

2008

Rev. Bras. Zool.

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ABSTRACT. Infant care is known to impose high energetic costs on female primates because in addition to lactation, most primate mothers also provide transport for their offspring. Many studies have documented the high energetic costs of lactation, but less is known about energetic costs of infant carrying and their effects on the recovery of maternal physical condition. We compared the activities of female northern muriquis (Brachyteles hypoxanthus Kuhl, 1820) over a 12-month period at the RPPN Feliciano Miguel Abdala, Minas Gerais, Brazil to investigate whether mothers during their weaning year behaved differently than mothers in their post-weaning year, when they resumed reproductive cycling and copulating, and conceived again. We found no significant differences in the behavioral activity budgets of mothers in their weaning year (n = 4) versus post-weaning year (n = 5), despite the significantly higher proportion of time that mothers in their weaning year spent in close proximity with their infants and carrying their infants compared to mothers in their post-weaning year. We suggest that the energy budgets of weaning are similar to those of post-weaning in female northern muriquis.

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“…We applied a diversity of approaches to investigate whether within-species variation influences the outcome of comparative studies, which has long been raised as a concern in studies of primate comparative biology (Struhsaker, 2000; Strier, 2003; Nunn, 2011). These approaches could be used in other comparative studies in evolutionary anthropology and human evolution.…”

Section: Discussionmentioning

confidence: 99%

“…This has long been noted as a concern in comparative studies of primates. For example, Strier (2003: 5) stated that, “the compression of intraspecific variation in any behavioral trait into a single, species-specific value precludes interspecific comparisons…”. Similarly, Struhsaker (2000: 119) warned that there is a “need to better understand interpopulational and intraspecific variation […].…”

Section: Introductionmentioning

confidence: 99%

Assessing sources of error in comparative analyses of primate behavior: Intraspecific variation in group size and the social brain hypothesis

Sandel

Miller

Mitani

et al. 2016

Journal of Human Evolution

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Phylogenetic comparative methods have become standard for investigating evolutionary hypotheses, including in studies of human evolution. While these methods account for the non-independence of trait data due to phylogeny, they often fail to consider intraspecific variation, which may lead to biased or erroneous results. We assessed the degree to which intraspecific variation impacts the results of comparative analyses by investigating the “social brain” hypothesis, which has provided a framework for explaining complex cognition and large brains in humans. This hypothesis suggests that group life imposes a cognitive challenge, with species living in larger social groups having comparably larger neocortex ratios than those living in smaller groups. Primates, however, vary considerably in group size within species, a fact that has been ignored in previous analyses. When within-species variation in group size is high, the common practice of using a mean value to represent the species may be inappropriate. We conducted regression and resampling analyses to ascertain whether the relationship between neocortex ratio and group size across primate species persists after controlling for within-species variation in group size. We found that in a sample of 23 primates, 70% of the variation in group size was due to between-species variation. Controlling for within-species variation in group size did not affect the results of phylogenetic analyses, which continued to show a positive relationship between neocortex ratio and group size. Analyses restricted to non-monogamous primates revealed considerable intraspecific variation in group size, but the positive association between neocortex ratio and group size remained even after controlling for within-species variation in group size. Our findings suggest that the relationship between neocortex size and group size in primates is robust. In addition, our methods and associated computer code provide a way to assess and account for intraspecific variation in other comparative analyses of primate evolution.

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Primatology comes of age: 2002 AAPA Luncheon address

Cited by 28 publications

References 63 publications

Maternal behavior and maternal stress are associated with infant behavioral development in macaques

Maternal behavior and maternal stress are associated with infant behavioral development in macaques

Energetic costs of reproduction in female northern muriquis, Brachyteles hypoxanthus (Primates: Platyrrinhi: Atelidae)

Assessing sources of error in comparative analyses of primate behavior: Intraspecific variation in group size and the social brain hypothesis

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