A description of the Cayo Santiago rhesus monkey (Macaca mulatta) colony is provided including an... more A description of the Cayo Santiago rhesus monkey (Macaca mulatta) colony is provided including an aerial photograph and map.
Multilocus DNA fingerprinting with oligonucleotide probes (GTG)5, (GATA)4, and (CA)8 was applied ... more Multilocus DNA fingerprinting with oligonucleotide probes (GTG)5, (GATA)4, and (CA)8 was applied in order to determine paternity in one birth cohort (15 infants) of social group (S) from the free-ranging colony of rhesus macaques (Macaca mulatta) on Cayo Santiago. While sires could be identified in 11 cases, all males tested (N = 19) could be excluded from paternity for the remaining four infants. Data revealed marked discrepancies between actual paternity and paternity as inferred from the observation of copulation behavior. Thus, a dominant social rank does not appear to be strongly associated with reproductive success. Furthermore, alternative reproductive strategies were found to yield comparable net benefits in reproduction. A second group of animals (M) was translocated from Cayo Santiago to the Sabana Seca Field Station in 1984. They have continuously resided together in a large outdoor enclosure since then. Here paternity assessment was seriously impeded by a reduced number ...
Folia primatologica; international journal of primatology
Rhesus macaques (Macaca mulatta) live in multimale/multifemale social gro... more Rhesus macaques (Macaca mulatta) live in multimale/multifemale social groups, characterised by male natal emigration at puberty and repeated transfer throughout adulthood [Berard, 1991]. Transfer from the natal group generally occurs in males at 4 to 6 years of age, although transfer age can vary considerably between individuals [Colvin, 1986]. Male natal rank, largely determined by maternal rank, explains some variation
A VNTR polymorphism previously characterized in the promoter region of the human serotonin transp... more A VNTR polymorphism previously characterized in the promoter region of the human serotonin transporter (SLC6A4) gene was also found to segregate two major alleles (l and s) among the free-ranging rhesus macaques of Cayo Santiago, Puerto Rico. When VNTR genotypes were related to age at male natal dispersal on Cayo Santiago, ss homozygotes (43 of 532 males tested) were found to have left their natal groups significantly earlier (age 57.1 +/- 2.6 months) than carriers of the l allele (ll age, 71.5 +/- 2.1 months; ls age, 63.5 +/- 1.5 months; P = 0.0001). Since migration implies reproductive costs and benefits that change with age at dispersal, migration at an intermediate age might have conferred a heterozygote advantage serving to maintain the VNTR polymorphism via overdominant selection.
In many mammalian species, male reproductive success appears to climb sharply at young adulthood,... more In many mammalian species, male reproductive success appears to climb sharply at young adulthood, form a brief plateau during prime ages, and decline among older animals, a pattern often attributed to reduced physical condition with ageing. However, solid evidence to either substantiate or refute this profile among nonhuman primates is lacking. Here, we combine a decade of genetic analysis of paternity among free-ranging rhesus macaques, Macaca mulatta, with information about body condition in order to evaluate how changes in morphology might govern age-specific reproduction among males. We show that age-specific reproductive success traverses the same life history profile as found in other mammals, but reductions in reproductive output with advanced age were associated with reduced chances of survivorship rather than accompanied by diminished body condition. We demonstrate that variance in male age at onset of reproduction is three times greater than variance in female age at onset of reproduction. We provide the first evidence from primates that age-specific reproductive output among males is not a consequence of age-related changes in body condition, but reflects social and demographic factors.
Rhesus macaques (Macaca mulatta) live in multimale/multifemale social gro... more Rhesus macaques (Macaca mulatta) live in multimale/multifemale social groups, characterised by male natal emigration at puberty and repeated transfer throughout adulthood [Berard, 1991]. Transfer from the natal group generally occurs in males at 4 to 6 years of age, although transfer age can vary considerably between individuals [Colvin, 1986]. Male natal rank, largely determined by maternal rank, explains some variation
A systematic search was performed for DNA sequence variation in genes regulating neurotransmitter... more A systematic search was performed for DNA sequence variation in genes regulating neurotransmitter metabolism in rhesus macaque (Macaca mulatta). These genes included dopamine and serotonin receptors and transporters, and tyrosine hydroxylase. A total of 13 single nucleotide polymorphisms in five different genes were identified, namely: DRD1 (-244T->G), q = 0.45; DRD1 (-179C->T), q = 0.19; DRD1 (-127G->A), q = 0.25; DRD1(-11T->G), q = 0.08; DRD1(-81C->T), q = 0.19; DRD3 (248G->A), q= 0.08; DRD3(341G->C), q = 0.11; DRD3(377A->G), q = 0.19; DRD3 (403C->T; A59V), q= 0.11; DRD4(2608G->A), q= 0.48; HTR1D(-506G->T), q = 0.47; HTR1D(-173C->T), q = 0.47; and HTT(340G->A), q = 0.39. The nucleotide positions listed correspond to the human homologs.
... 2 Figures) (Ace 6-IV-1994) Summary Male rhesus macaques on Cayo Santiago use rank-dependent a... more ... 2 Figures) (Ace 6-IV-1994) Summary Male rhesus macaques on Cayo Santiago use rank-dependent alternative reproductive tactics. High-ranking males can form long-term consorts and guard female mates while low-ranking males frequently resort to quick copulations under ...
APA PsycNET Our Apologies! - The following features are not available with your current Browser c... more APA PsycNET Our Apologies! - The following features are not available with your current Browser configuration. - alerts user that their session is about to expire - display, print, save, export, and email selected records - get My ...
... Jay R. Kaplan Ph.D 1,* ,; M. Babette Fontenot 1 ,; John Berard 2 ,; Stephen B. Manuck 3 ,; J.... more ... Jay R. Kaplan Ph.D 1,* ,; M. Babette Fontenot 1 ,; John Berard 2 ,; Stephen B. Manuck 3 ,; J. John Mann 4. Article first published online: 2 JUN 2005. ... Department of Comparative Medicine, BowmanGray School of Medicine of Wake Forest University, Winston-Salem, North Carolina ...
Tetanus was a major cause of mortality in the free-ranging population of rhesus monkeys (Macaca m... more Tetanus was a major cause of mortality in the free-ranging population of rhesus monkeys (Macaca mulatta) on Cayo Santiago. From 1977 to 1984 the mean (±1 SD) annual total mortality rate (excluding neonatal deaths within 48 h postpartum, abortions, and stillbirths) was 6.39% ...
A description of the Cayo Santiago rhesus monkey (Macaca mulatta) colony is provided including an... more A description of the Cayo Santiago rhesus monkey (Macaca mulatta) colony is provided including an aerial photograph and map.
Multilocus DNA fingerprinting with oligonucleotide probes (GTG)5, (GATA)4, and (CA)8 was applied ... more Multilocus DNA fingerprinting with oligonucleotide probes (GTG)5, (GATA)4, and (CA)8 was applied in order to determine paternity in one birth cohort (15 infants) of social group (S) from the free-ranging colony of rhesus macaques (Macaca mulatta) on Cayo Santiago. While sires could be identified in 11 cases, all males tested (N = 19) could be excluded from paternity for the remaining four infants. Data revealed marked discrepancies between actual paternity and paternity as inferred from the observation of copulation behavior. Thus, a dominant social rank does not appear to be strongly associated with reproductive success. Furthermore, alternative reproductive strategies were found to yield comparable net benefits in reproduction. A second group of animals (M) was translocated from Cayo Santiago to the Sabana Seca Field Station in 1984. They have continuously resided together in a large outdoor enclosure since then. Here paternity assessment was seriously impeded by a reduced number ...
Folia primatologica; international journal of primatology
Rhesus macaques (Macaca mulatta) live in multimale/multifemale social gro... more Rhesus macaques (Macaca mulatta) live in multimale/multifemale social groups, characterised by male natal emigration at puberty and repeated transfer throughout adulthood [Berard, 1991]. Transfer from the natal group generally occurs in males at 4 to 6 years of age, although transfer age can vary considerably between individuals [Colvin, 1986]. Male natal rank, largely determined by maternal rank, explains some variation
A VNTR polymorphism previously characterized in the promoter region of the human serotonin transp... more A VNTR polymorphism previously characterized in the promoter region of the human serotonin transporter (SLC6A4) gene was also found to segregate two major alleles (l and s) among the free-ranging rhesus macaques of Cayo Santiago, Puerto Rico. When VNTR genotypes were related to age at male natal dispersal on Cayo Santiago, ss homozygotes (43 of 532 males tested) were found to have left their natal groups significantly earlier (age 57.1 +/- 2.6 months) than carriers of the l allele (ll age, 71.5 +/- 2.1 months; ls age, 63.5 +/- 1.5 months; P = 0.0001). Since migration implies reproductive costs and benefits that change with age at dispersal, migration at an intermediate age might have conferred a heterozygote advantage serving to maintain the VNTR polymorphism via overdominant selection.
In many mammalian species, male reproductive success appears to climb sharply at young adulthood,... more In many mammalian species, male reproductive success appears to climb sharply at young adulthood, form a brief plateau during prime ages, and decline among older animals, a pattern often attributed to reduced physical condition with ageing. However, solid evidence to either substantiate or refute this profile among nonhuman primates is lacking. Here, we combine a decade of genetic analysis of paternity among free-ranging rhesus macaques, Macaca mulatta, with information about body condition in order to evaluate how changes in morphology might govern age-specific reproduction among males. We show that age-specific reproductive success traverses the same life history profile as found in other mammals, but reductions in reproductive output with advanced age were associated with reduced chances of survivorship rather than accompanied by diminished body condition. We demonstrate that variance in male age at onset of reproduction is three times greater than variance in female age at onset of reproduction. We provide the first evidence from primates that age-specific reproductive output among males is not a consequence of age-related changes in body condition, but reflects social and demographic factors.
Rhesus macaques (Macaca mulatta) live in multimale/multifemale social gro... more Rhesus macaques (Macaca mulatta) live in multimale/multifemale social groups, characterised by male natal emigration at puberty and repeated transfer throughout adulthood [Berard, 1991]. Transfer from the natal group generally occurs in males at 4 to 6 years of age, although transfer age can vary considerably between individuals [Colvin, 1986]. Male natal rank, largely determined by maternal rank, explains some variation
A systematic search was performed for DNA sequence variation in genes regulating neurotransmitter... more A systematic search was performed for DNA sequence variation in genes regulating neurotransmitter metabolism in rhesus macaque (Macaca mulatta). These genes included dopamine and serotonin receptors and transporters, and tyrosine hydroxylase. A total of 13 single nucleotide polymorphisms in five different genes were identified, namely: DRD1 (-244T->G), q = 0.45; DRD1 (-179C->T), q = 0.19; DRD1 (-127G->A), q = 0.25; DRD1(-11T->G), q = 0.08; DRD1(-81C->T), q = 0.19; DRD3 (248G->A), q= 0.08; DRD3(341G->C), q = 0.11; DRD3(377A->G), q = 0.19; DRD3 (403C->T; A59V), q= 0.11; DRD4(2608G->A), q= 0.48; HTR1D(-506G->T), q = 0.47; HTR1D(-173C->T), q = 0.47; and HTT(340G->A), q = 0.39. The nucleotide positions listed correspond to the human homologs.
... 2 Figures) (Ace 6-IV-1994) Summary Male rhesus macaques on Cayo Santiago use rank-dependent a... more ... 2 Figures) (Ace 6-IV-1994) Summary Male rhesus macaques on Cayo Santiago use rank-dependent alternative reproductive tactics. High-ranking males can form long-term consorts and guard female mates while low-ranking males frequently resort to quick copulations under ...
APA PsycNET Our Apologies! - The following features are not available with your current Browser c... more APA PsycNET Our Apologies! - The following features are not available with your current Browser configuration. - alerts user that their session is about to expire - display, print, save, export, and email selected records - get My ...
... Jay R. Kaplan Ph.D 1,* ,; M. Babette Fontenot 1 ,; John Berard 2 ,; Stephen B. Manuck 3 ,; J.... more ... Jay R. Kaplan Ph.D 1,* ,; M. Babette Fontenot 1 ,; John Berard 2 ,; Stephen B. Manuck 3 ,; J. John Mann 4. Article first published online: 2 JUN 2005. ... Department of Comparative Medicine, BowmanGray School of Medicine of Wake Forest University, Winston-Salem, North Carolina ...
Tetanus was a major cause of mortality in the free-ranging population of rhesus monkeys (Macaca m... more Tetanus was a major cause of mortality in the free-ranging population of rhesus monkeys (Macaca mulatta) on Cayo Santiago. From 1977 to 1984 the mean (±1 SD) annual total mortality rate (excluding neonatal deaths within 48 h postpartum, abortions, and stillbirths) was 6.39% ...
Uploads
Papers by John Berard