Sexual Selection, Female Choice and Mating Systems

Izar, Patrícia; Stone, Anita I.; Carnegie, Sarah D.; Nakai, Érica Silva

doi:10.1007/978-0-387-78705-3_7

Cited by 35 publications

(91 citation statements)

References 83 publications

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“…We also performed ad libitum sampling of female proceptivity, sexual interactions and births. Female proceptive behavior is described by Izar (2009). Group location was recorded every 5 minutes, at the beginning of each scan sampling, using a Map 60 CSx GPS handset as described by Presotto & Izar (2010).…”

Section: Behavior Samplingmentioning

confidence: 99%

“…Previous studies suggested that the black capuchin monkeys (Sapajus nigritus) living at Carlos Botelho State Park (PECB) -an area of Atlantic Forest in São Paulo state, Brazil -present low reproduction rate, large home range and foraging in subgroups as a consequence of nonideal environmental condition characterized by low food availability, especially during the dry season (Izar, 2004;Izar, Stone, Carnegie, & Nakai, 2009;Izar et al, 2012). In this context, and using the association between energy mobilization and GCs, we verified whether energy shortage during the dry season would result in higher levels of fecal glucocorticoid metabolites (GCM) on individuals' feces.…”

Section: Introductionmentioning

confidence: 99%

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Variation of glucocorticoid metabolite levels is associated with survival demands in immature and reproductive demands in adult wild black capuchins (Sapajus nigritus)

Moreira

Santos²,

Sousa³

et al. 2016

Int. j. psychol. res.

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According to the concept of allostasis and its association with energy mobilization, glucocorticoids (GCs) should parallel cumulative energy expenditure for animal survival and reproduction. Therefore, it is expected that seasonal food shortages might lead to increased levels of GCs. We tested this hypothesis by analyzing the intra-annual variation of fecal glucocorticoid metabolites (GCM) in 14 wild black capuchin monkeys (Sapajus nigritus) living in a social group in the Brazilian Atlantic Forest. We analyzed the association between GCM and social and environmental variables for the three age/sex classes (adult males, adult females and immatures (juveniles and infants). Decreased fruit intake during the dry season increased the GCM levels of both immatures and adult males. Although fruit shortage influenced the allostasis of adult males, the variation in their GCM levels was more impacted by the breeding season. GCM levels of adult females varied during the late stage of pregnancy. These results suggest fruit consumption as the main source of allostatic load for immature animals, while reproductive costs had greater effect on adults. De acuerdo al concepto de alostasis y su asociación con la movilización de la energía, los glucocorticoides (GC) deben acumular en paralelo la energía para la supervivencia animal y la reproducción. Por lo tanto, se espera que la escaséz de alimentos de temporada pueda llevar al incremento de los niveles de GC. Pusimos a prueba esta hipótesis mediante el análisis de la variación intra-anual de metabolitos de glucocorticoides fecales (MGC) en 14 monos capuchinos salvajes negros (Sapajus nigritus), que vivían en un grupo social en el bosque R e s e a r c h

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Section: Behavior Samplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Variation of glucocorticoid metabolite levels is associated with survival demands in immature and reproductive demands in adult wild black capuchins (Sapajus nigritus)

Moreira

Santos²,

Sousa³

et al. 2016

Int. j. psychol. res.

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Groups show female-biased sex ratios (Stone, 2004) and are characterized by weak male-female associations, with males remaining at the periphery of the group during most of the non-breeding periods (Izar et al, 2008). In addition, adult female S. collinsi are dominant to adult males (Izar et al, 2008). Squirrel monkeys are highly seasonal breeders (Di Bitetti and Janson, 2000) and males show weight gain (85 to 222 g; DuMond and Hutchison, 1967) during the brief mating period (two to eight weeks; Izar et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, adult female S. collinsi are dominant to adult males (Izar et al, 2008). Squirrel monkeys are highly seasonal breeders (Di Bitetti and Janson, 2000) and males show weight gain (85 to 222 g; DuMond and Hutchison, 1967) during the brief mating period (two to eight weeks; Izar et al, 2008). The weight gain results from fat deposition and water retention, which produces a "fatted" appearance in the upper torso, arms and shoulders (Mendoza et al 1978;Boinski, 1987;Mitchell, 1990;Stone, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Jealous of mom? Interactions between infants and adult males during the mating season in wild squirrel monkeys (<i>Saimiri collinsi</i>)

Ruivo

Stone

2014

Neotrop. Primates

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Squirrel monkeys (Saimiri collinsi) are seasonal breeders that live in large social groups in which females are dominant to males. Females have one infant per year, and the nursing period lasts six to eight months. Preliminary observations in the wild indicated that during the mating period (eight weeks: July and August in our population), the infants show agonism directed at males who approach their mothers. This directed sexual interference by infants has rarely been reported for neotropical primates. Our study reports observations in a natural population of Saimiri collinsi with the aim of describing the social behavior of infants during the breeding season, especially with regard to adult males in the group. Infants of both sexes were observed during three mating periods (2011, 2012, 2013), to test hypotheses about the possible function of infant harassment directed at adult males. The behavior of infants (variables: activity and nearest neighbor) was sampled by the focal animal method as well as ad libitum observations. We recorded 99 cases of agonism and 17 cases of tolerance between nearby males and infants via the all-occurrence method. Thus, 85% of interactions between adult males and infants involved agonism. These results suggest that infant interference can present a cost to adult males during the breeding season.

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Long‐Term Field Studies— A mericas

Strier

2017

The International Encyclopedia of Primatology

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Despite a relatively slow start, field studies of New World primates have proliferated throughout Mesoamerica and South America since the 1970s and especially the 1980s. Long‐term studies spanning multiple generations have provided data on the life histories and demographic fluctuations of particular study groups and populations for a number of different species. At the same time, a number of established field sites have supported continuous or nearly continuous studies on different species of primates and their ecological communities. Together, these research efforts have contributed to broad, comparative perspectives about the behavioral variation of New World primates over space as well as time. Ongoing threats of extinction have continued to fuel urgent new and ongoing field research that can contribute to informed conservation efforts.

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Sexual Selection, Female Choice and Mating Systems

Cited by 35 publications

References 83 publications

Variation of glucocorticoid metabolite levels is associated with survival demands in immature and reproductive demands in adult wild black capuchins (Sapajus nigritus)

Variation of glucocorticoid metabolite levels is associated with survival demands in immature and reproductive demands in adult wild black capuchins (Sapajus nigritus)

Jealous of mom? Interactions between infants and adult males during the mating season in wild squirrel monkeys (<i>Saimiri collinsi</i>)

Long‐Term Field Studies— A mericas

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