Fred B Bercovitch
Dados Biográficos
| ID | 225056 |
|---|---|
| NOME | Fred B Bercovitch |
| PRENOMES | Fred B |
| SOBRENOME | Bercovitch |
| ASSINATURA | BERCOVITCH F B |
| AFILIAÇÕES | Kyoto University |
| ORCID | 0000-0002-0529-1340 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 29 |
| TOTAL DE CITAÇÕES | 38 |
| OBRAS COMO AUTOR | 29 |
| OBRAS COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1978 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2024 |
| ÍNDICE H | 3 |
The impact of tourist visits on mountain gorilla behavior in Uganda
Tourism can play a significant role in the conservation of mountain gorillas (Gorilla beringei beringei) by financing the protection of their habitat, but few systematic studies have focused on the impacts of tourist presence on gorilla behavior. We assessed stress-coping mechanisms (Prosocial behaviors), behavioral indicators of stress (Self-scratching), and Human-directed behavior, in the presence and absence of tourist groups visiting one grou…
Reducing stress and stereotypic behaviors in captive female pygmy slow lorises ( Nycticebus pygmeaus )
Improving captive conditions of pygmy slow lorises (Nekaris and Nijman have recently suggested that the pygmy slow loris should be called the pygmy loris and is distinctive enough to warrant a new genus, Xanthonycticebu ) ( Nycticebus pygmeaus) poses many challenges because detailed aspects of their lives in the wild are incomplete. This hinders efforts to replicate sustainable environments for them. To improve their well‐being in captivity, eigh…
A comparative perspective on the evolution of mammalian reactions to dead conspecifics
Changes in social behavior and fecal glucocorticoids in a Japanese macaque (Macaca fuscata) carrying her dead infant
Salivary alpha-amylase enzyme is a non-invasive biomarker of acute stress in Japanese macaques (Macaca fuscata)
Beneficial effect of hot spring bathing on stress levels in Japanese macaques
Development and Validation of an Enzyme Immunoassay for Fecal Dehydroepiandrosterone Sulfate in Japanese Macaques (Macaca fuscata)
Tube task hand preference in captive hylobatids
Genetic studies on the Cayo Santiago rhesus macaques
Genetic studies not only contribute substantially to our current understanding of the natural variation in behavior and health in many species, they also provide the basis of numerous in vivo models of human traits. Despite the many challenges posed by the high level of biological and social complexity, a long lifespan and difficult access in the field, genetic studies of primates are particularly rewarding because of the close evolutionary relat…
Environmental, biological, and social factors influencing fecal adrenal steroid concentrations in female Japanese macaques ( Macaca fuscata )
The ability to determine hormonal profiles of primate populations using non-invasive techniques can help to monitor physical fitness, stress, and physiological responses to environmental changes. We investigated fecal glucocorticoids (fGC) and DHEAS concentrations in captive Japanese macaques (Macaca fuscata) in relation to environmental, biological, and social factors. The subjects were female Japanese monkeys from 4 months to 31 years old house…
Postpartum recuperation in primiparous rhesus macaques and development of their infants
Female primates endure great costs during pregnancy and lactation. Some studies have been conducted on exploring these; however, information on how maternal condition before conception influences maternal postpartum recuperation and infant development are not well known, especially in primipares. This 2‐year investigation explored how maternal condition, maternal foraging time and alert time, and infants' time on nipple influenced postpartum reco…
Tetanus antibody titers and duration of immunity to clinical tetanus infections in free‐ranging rhesus monkeys ( Macaca mulatta )
Prior to 1985 tetanus was a major cause of mortality in the free‐ranging colony of rhesus monkeys on Cayo Santiago, accounting for almost a quarter of annual deaths. In 1985 and 1986 all animals (except infants) received primary and booster doses, respectively, of tetanus toxoid. In subsequent years primary immunizations were given to all yearlings, and boosters were administered to all 2‐year‐old animals during the annual capture of the colony. …
Are subordinates always stressed? a comparative analysis of rank differences in cortisol levels among primates
Multiple sirehood in free‐ranging twin rhesus macaques ( Macaca mulatta )
Rhesus macaque females regularly copulate with a number of partners, and produce a single offspring per reproductive cycle in over 99% of cases. We used genotyping of 10 STR markers to determine paternity in the Cayo Santiago population of rhesus macaques. About 1,500 monkeys have been analyzed to date, with their marker genotypes entered into a computerized database. These data enable us to report the first documented case in any cercopithecine …
Sex-Biased Parental Investment in Primates
Current Topics in Primate Socioendocrinology
Socioendocrinology is the study of the effect of the social environment on the interactions between hormones and behavior. Individuals have evolved a physiological flexibility that enables them to respond to their social surroundings in a manner that maximizes reproductive success. We present evidence that (a) males who have evolved to participate in infant care have different endocrine profiles around offspring from males who have not evolved to…
Primigravidity, body weight, and costs of rearing first offspring in rhesus macaques
Body size is associated with menarche and ovarian function, but the relationship to first conception is rarely examined. We conducted a longitudinal investigation of rhesus macaques, Macaca mulatta, to determine the effect of differences in body weight on both the age at first conception and survivorship of first progeny. Young females who became pregnant weighed significantly more than peers who remained barren, with weight changes for females w…
Primigravidity, body weight, and costs of rearing first offspring in rhesus macaques
Paternity assessment in rhesus macaques ( Macaca mulatta )
Establishing kinship relations in primates using modern molecular genetic techniques has enhanced the ability to scrutinize a number of fundamental biological issues. We screened 51 human short tandem repeats (STRs) for cross-species PCR amplification in rhesus macaques (Macaca mulatta) and identified 11 polymorphic loci with heterozygosity rates of at least 0.6. These markers were used for paternity testing in three social groups (M, R, and S) o…
Reproductive strategies of rhesus macaques
Power and limits of DNA-profiling in primate populations
Testis size, epididymis weight, and sperm competition in rhesus macaques
The intensity of sperm competition is often measured using the gonadosomatic index (testes/body weight). But sperm competition could be mediated more by size of the epididymis than by size of the testicles, and little information is available on the relationship between testicular and epididymal size. We found that both organs were positively correlated in size among male rhesus macaques. Body weight accounted for over 70% of the variance in test…
Mate selection, consortship formation, and reproductive tactics in adult female savanna baboons
Impact of artificial fissioning and social networks on levels of aggression and affiliation in primates
Levels of aggression may be affected by stability of social relationships or by population density. A number of studies of nonhuman primates have indicated that spatial density influences agonistic activity levels less than does social density. Artificial fissioning of a captive troop of rhesus macaques was undertaken and the resultant differences in patterns of aggression and affiliation were examined. If population density has a major effect on…
The effects of isosexual rearing on adult sexual behavior in captive male rhesus macaques
Male rank and reproductive activity in Savanna baboons
Current Topics in Primate Socioendocrinology
Socioendocrinology is the study of the effect of the social environment on the interactions between hormones and behavior. Individuals have evolved a physiological flexibility that enables them to respond to their social surroundings in a manner that maximizes reproductive success. We present evidence that (a) males who have evolved to participate in infant care have different endocrine profiles around offspring from males who have not evolved to…
Sex-Biased Parental Investment in Primates
Development and Validation of an Enzyme Immunoassay for Fecal Dehydroepiandrosterone Sulfate in Japanese Macaques (Macaca fuscata)
A sequential analysis of female aggression in a group of lesser galagos (Galago senegalensis)
Male rank and reproductive activity in Savanna baboons
A benign method for maintaining ovulatory estrogen levels in cycling rhesus macaques
The goal of this study was to develop a relatively noninvasive technique for generating ovulatory estrogen levels in cycling females over extended periods of time. Eleven intact cycling rhesus macaques were given weekly injections of estradiol cypionate in an effort to obtain weekly levels which approximated ovulatory levels. A dose of 500 μg generated weekly estrogen values averaging 370 ± 18 pg/ml. This method is a satisfactory alternative to m…
Intersexual aggression and male sexual activity in captive rhesus macaques
Rape has been posited to be an outgrowth of male reproductive strategies. Forced copulations may have evolved as a consequence of the low parental investment made by males in producing and raising offspring. We designed a laboratory experiment which paired rhesus macaque males with females in order to assess the influence of intersexual aggression on male sexual activity. Younger and older adult males had comparable levels of sexual behavior, but…
The effects of isosexual rearing on adult sexual behavior in captive male rhesus macaques
Mate selection, consortship formation, and reproductive tactics in adult female savanna baboons
Impact of artificial fissioning and social networks on levels of aggression and affiliation in primates
Levels of aggression may be affected by stability of social relationships or by population density. A number of studies of nonhuman primates have indicated that spatial density influences agonistic activity levels less than does social density. Artificial fissioning of a captive troop of rhesus macaques was undertaken and the resultant differences in patterns of aggression and affiliation were examined. If population density has a major effect on…
Power and limits of DNA-profiling in primate populations
Testis size, epididymis weight, and sperm competition in rhesus macaques
The intensity of sperm competition is often measured using the gonadosomatic index (testes/body weight). But sperm competition could be mediated more by size of the epididymis than by size of the testicles, and little information is available on the relationship between testicular and epididymal size. We found that both organs were positively correlated in size among male rhesus macaques. Body weight accounted for over 70% of the variance in test…
Reproductive strategies of rhesus macaques
Primigravidity, body weight, and costs of rearing first offspring in rhesus macaques
Paternity assessment in rhesus macaques ( Macaca mulatta )
Establishing kinship relations in primates using modern molecular genetic techniques has enhanced the ability to scrutinize a number of fundamental biological issues. We screened 51 human short tandem repeats (STRs) for cross-species PCR amplification in rhesus macaques (Macaca mulatta) and identified 11 polymorphic loci with heterozygosity rates of at least 0.6. These markers were used for paternity testing in three social groups (M, R, and S) o…
Primigravidity, body weight, and costs of rearing first offspring in rhesus macaques
Body size is associated with menarche and ovarian function, but the relationship to first conception is rarely examined. We conducted a longitudinal investigation of rhesus macaques, Macaca mulatta, to determine the effect of differences in body weight on both the age at first conception and survivorship of first progeny. Young females who became pregnant weighed significantly more than peers who remained barren, with weight changes for females w…
Multiple sirehood in free‐ranging twin rhesus macaques ( Macaca mulatta )
Rhesus macaque females regularly copulate with a number of partners, and produce a single offspring per reproductive cycle in over 99% of cases. We used genotyping of 10 STR markers to determine paternity in the Cayo Santiago population of rhesus macaques. About 1,500 monkeys have been analyzed to date, with their marker genotypes entered into a computerized database. These data enable us to report the first documented case in any cercopithecine …
Sex-Biased Parental Investment in Primates
Current Topics in Primate Socioendocrinology
Socioendocrinology is the study of the effect of the social environment on the interactions between hormones and behavior. Individuals have evolved a physiological flexibility that enables them to respond to their social surroundings in a manner that maximizes reproductive success. We present evidence that (a) males who have evolved to participate in infant care have different endocrine profiles around offspring from males who have not evolved to…
Are subordinates always stressed? a comparative analysis of rank differences in cortisol levels among primates
Tetanus antibody titers and duration of immunity to clinical tetanus infections in free‐ranging rhesus monkeys ( Macaca mulatta )
Prior to 1985 tetanus was a major cause of mortality in the free‐ranging colony of rhesus monkeys on Cayo Santiago, accounting for almost a quarter of annual deaths. In 1985 and 1986 all animals (except infants) received primary and booster doses, respectively, of tetanus toxoid. In subsequent years primary immunizations were given to all yearlings, and boosters were administered to all 2‐year‐old animals during the annual capture of the colony. …
Postpartum recuperation in primiparous rhesus macaques and development of their infants
Female primates endure great costs during pregnancy and lactation. Some studies have been conducted on exploring these; however, information on how maternal condition before conception influences maternal postpartum recuperation and infant development are not well known, especially in primipares. This 2‐year investigation explored how maternal condition, maternal foraging time and alert time, and infants' time on nipple influenced postpartum reco…
Environmental, biological, and social factors influencing fecal adrenal steroid concentrations in female Japanese macaques ( Macaca fuscata )
The ability to determine hormonal profiles of primate populations using non-invasive techniques can help to monitor physical fitness, stress, and physiological responses to environmental changes. We investigated fecal glucocorticoids (fGC) and DHEAS concentrations in captive Japanese macaques (Macaca fuscata) in relation to environmental, biological, and social factors. The subjects were female Japanese monkeys from 4 months to 31 years old house…
Genetic studies on the Cayo Santiago rhesus macaques
Genetic studies not only contribute substantially to our current understanding of the natural variation in behavior and health in many species, they also provide the basis of numerous in vivo models of human traits. Despite the many challenges posed by the high level of biological and social complexity, a long lifespan and difficult access in the field, genetic studies of primates are particularly rewarding because of the close evolutionary relat…
Tube task hand preference in captive hylobatids
Beneficial effect of hot spring bathing on stress levels in Japanese macaques
Development and Validation of an Enzyme Immunoassay for Fecal Dehydroepiandrosterone Sulfate in Japanese Macaques (Macaca fuscata)
Salivary alpha-amylase enzyme is a non-invasive biomarker of acute stress in Japanese macaques (Macaca fuscata)
Biology (27 obras) · Primate Behavior and Ecology (24 obras) · Demography (15 obras) · Zoology (15 obras) · Animal Behavior and Reproduction (14 obras) · Animal ecology (11 obras) · Ecology (11 obras) · Population (11 obras) · Ecology (10 obras) · Primate (10 obras)