Published in Gen Comp Endocrinol on August 11, 2007
Symbiotic bacteria appear to mediate hyena social odors. Proc Natl Acad Sci U S A (2013) 1.22
Fecal glucocorticoids reflect socio-ecological and anthropogenic stressors in the lives of wild spotted hyenas. Horm Behav (2008) 1.13
Building large trees by combining phylogenetic information: a complete phylogeny of the extant Carnivora (Mammalia). Biol Rev Camb Philos Soc (1999) 4.80
Gene expression profiles of cumulus cell oocyte complexes during ovulation reveal cumulus cells express neuronal and immune-related genes: does this expand their role in the ovulation process? Mol Endocrinol (2006) 1.51
Rank and reproduction in the female spotted hyaena. J Reprod Fertil (1996) 1.38
Comparative aspects of steroid hormone metabolism and ovarian activity in felids, measured noninvasively in feces. Biol Reprod (1994) 1.24
Hormonal correlates of 'masculinization' in female spotted hyaenas (Crocuta crocuta). 2. Maternal and fetal steroids. J Reprod Fertil (1992) 1.14
Hormonal correlates of 'masculinization' in female spotted hyaenas (Crocuta crocuta). 1. Infancy to sexual maturity. J Reprod Fertil (1992) 1.11
Variation in steroid hormones associated with infant care behaviour and experience in male marmosets (Callithrix kuhlii). Anim Behav (2000) 1.08
Germ cells of the mouse testis express P450 aromatase. Endocrinology (1993) 1.06
Diurnal variation on the excretion patterns of fecal steroids in common marmoset (Callithrix jacchus) females. Am J Primatol (1998) 1.02
Androgens and the role of female "hyperaggressiveness" in spotted hyenas (Crocuta crocuta). Horm Behav (2001) 0.94
Pup exposure differentially enhances foraging ability in primiparous and nulliparous rats. Physiol Behav (2005) 0.92
Non-invasive monitoring of fecal androgens in spotted hyenas (Crocuta crocuta). Gen Comp Endocrinol (2004) 0.92
Effects of dispersal status on pituitary and gonadal function in the male spotted hyena. Horm Behav (2003) 0.92
Aggression in the female golden hamster: effects of reproductive state and social isolation. Horm Behav (1974) 0.91
Androgens and masculinization of genitalia in the spotted hyaena (Crocuta crocuta). 1. Urogenital morphology and placental androgen production during fetal life. J Reprod Fertil (1998) 0.91
Effects of prenatal treatment with antiandrogens on luteinizing hormone secretion and sex steroid concentrations in adult spotted hyenas, Crocuta crocuta. Biol Reprod (2002) 0.90
Androgens and masculinization of genitalia in the spotted hyaena (Crocuta crocuta). 3. Effects of juvenile gonadectomy. J Reprod Fertil (1998) 0.89
Life-history correlates of steroid concentrations in wild peripartum baboons. Am J Primatol (2004) 0.89
Metabolic control of food intake and estrous cycles in syrian hamsters. I. Plasma insulin and leptin. Am J Physiol Regul Integr Comp Physiol (2000) 0.87
Association of seasonal reproductive patterns with changing food availability in an equatorial carnivore, the spotted hyaena (Crocuta crocuta). J Reprod Fertil (1999) 0.86
The superovulation of synchronous adult rats using follicle-stimulating hormone delivered by continuous infusion. Biol Reprod (1991) 0.83
Lymphocytes and MHC class II positive cells in the female rabbit reproductive tract before and after ovulation. Immunol Cell Biol (2005) 0.83
Hormonal correlates of changes in interest in unrelated infants across the peripartum period in female baboons (Papio hamadryas anubis sp.). Horm Behav (2004) 0.82
Annual changes in fecal estradiol-17beta concentrations of the sun bear (Helarctos malayanus) in Sarawak, Malaysia. J Vet Med Sci (2002) 0.79
Urinary estradiol-17 beta excretion in common marmosets, Callithrix jacchus: diurnal pattern and relationship between creatinine-related values and excreted amount. Comp Biochem Physiol Comp Physiol (1993) 0.78
Concentrations of luteinizing hormone and oestradiol in plasma and response to injection of gonadotrophin-releasing hormone analogue at selected stages of anoestrus in domestic bitches. J Reprod Fertil (1992) 0.77
Relations between feeding intolerance and stress biomarkers in preterm infants. J Pediatr Gastroenterol Nutr (2013) 2.67
Elephant breakdown. Nature (2005) 2.26
Innovative problem solving by wild spotted hyenas. Proc Biol Sci (2012) 1.46
Manipulation of the oxytocin system alters social behavior and attraction in pair-bonding primates, Callithrix penicillata. Horm Behav (2009) 1.45
Evidence for a bacterial mechanism for group-specific social odors among hyenas. Sci Rep (2012) 1.30
Behavioural structuring of relatedness in the spotted hyena (Crocuta crocuta) suggests direct fitness benefits of clan-level cooperation. Mol Ecol (2004) 1.29
Symbiotic bacteria appear to mediate hyena social odors. Proc Natl Acad Sci U S A (2013) 1.22
Fecal glucocorticoids reflect socio-ecological and anthropogenic stressors in the lives of wild spotted hyenas. Horm Behav (2008) 1.13
Post-weaning maternal effects and the evolution of female dominance in the spotted hyena. Proc Biol Sci (2009) 1.06
Elevated urinary testosterone excretion and decreased maternal caregiving effort in marmosets when conception occurs during the period of infant dependence. Horm Behav (2005) 1.01
Intensity of aggressive interactions modulates testosterone in male marmosets. Physiol Behav (2004) 0.99
Effects of social status, age, and season on androgen and cortisol levels in wild male golden lion tamarins (Leontopithecus rosalia). Horm Behav (2005) 0.99
Opportunistic mothers: female marmosets (Callithrix kuhlii) reduce their investment in offspring when they have to, and when they can. J Hum Evol (2005) 0.98
Development of a versatile enzyme immunoassay for non-invasive assessment of glucocorticoid metabolites in a diversity of taxonomic species. Gen Comp Endocrinol (2013) 0.98
Species and fetal gender effects on the endocrinology of pregnancy in elephants. Gen Comp Endocrinol (2004) 0.98
Fetal testosterone surge: specific modulations induced in male rats by maternal stress and/or alcohol consumption. Horm Behav (2003) 0.98
An epidemiological approach to welfare research in zoos: the Elephant Welfare Project. J Appl Anim Welf Sci (2013) 0.97
The role of the endocrine system in baboon maternal behavior. Biol Psychiatry (2004) 0.96
Vocal buffering of the stress response: exposure to conspecific vocalizations moderates urinary cortisol excretion in isolated marmosets. Horm Behav (2005) 0.95
Responses to olfactory stimuli in spotted hyenas (Crocuta crocuta): II. Discrimination of conspecific scent. J Comp Psychol (2002) 0.93
Non-invasive monitoring of fecal androgens in spotted hyenas (Crocuta crocuta). Gen Comp Endocrinol (2004) 0.92
Unique biphasic progestagen profile in parturient and non-parturient giant pandas (Ailuropoda melanoleuca) as determined by faecal hormone monitoring. Reproduction (2010) 0.91
Reproduction and aging in marmosets and tamarins. Interdiscip Top Gerontol (2008) 0.90
Effects of prenatal treatment with antiandrogens on luteinizing hormone secretion and sex steroid concentrations in adult spotted hyenas, Crocuta crocuta. Biol Reprod (2002) 0.90
Behavioral neuroendocrinology in nontraditional species of mammals: things the 'knockout' mouse CAN'T tell us. Horm Behav (2005) 0.90
International Society for Wildlife Endocrinology: the future of endocrine measures for reproductive science, animal welfare and conservation biology. Biol Lett (2012) 0.88
Brain size and social complexity: a computed tomography study in Hyaenidae. Brain Behav Evol (2011) 0.88
Multiple determinants of whole and regional brain volume among terrestrial carnivorans. PLoS One (2012) 0.88
Masculinized otoacoustic emissions in female spotted hyenas (Crocuta crocuta). Horm Behav (2006) 0.87
Noninvasive monitoring of adrenocortical function in captive jaguars (Panthera onca). Zoo Biol (2011) 0.87
Ontogenetic change in skull morphology and mechanical advantage in the spotted hyena (Crocuta crocuta). J Morphol (2010) 0.87
Quality of maternal and paternal care predicts later stress reactivity in the cooperatively-breeding marmoset (Callithrix geoffroyi). Psychoneuroendocrinology (2013) 0.87
Production and perception of sex differences in vocalizations of Wied's black-tufted-ear marmosets (Callithrix kuhlii). Am J Primatol (2009) 0.85
Endocrine milieu of perioestrus in the giant panda (Ailuropoda melanoleuca), as determined by non-invasive hormone measures. Reprod Fertil Dev (2010) 0.85
Variation of hair cortisol concentrations among wild populations of two baboon species (Papio anubis, P. hamadryas) and a population of their natural hybrids. Primates (2015) 0.84
Social isolation affects partner-directed social behavior and cortisol during pair formation in marmosets, Callithrix geoffroyi. Physiol Behav (2011) 0.84
Postparturitional testosterone surge in male offspring of rats stressed and/or fed ethanol during late pregnancy. Horm Behav (2002) 0.84
Demographic review of a captive colony of callitrichids (Callithrix kuhlii). Am J Primatol (2007) 0.84
Influence of dominance status on adrenal activity and ovarian cyclicity status in captive African elephants. Zoo Biol (2010) 0.84
Maternal androgen levels during pregnancy are associated with early-life growth in Geoffroy's marmosets, Callithrix geoffroyi. Gen Comp Endocrinol (2009) 0.84
Hybridization effects and genetic diversity of the common and black-tufted marmoset (Callithrix jacchus and Callithrix penicillata) mitochondrial control region. Am J Phys Anthropol (2014) 0.83
Social and developmental influences on urinary androgen levels in young male white-faced marmosets (Callithrix geoffroyi). Am J Primatol (2010) 0.83
Liquid semen storage in elephants (Elephas maximus and Loxodonta africana): species differences and storage optimization. J Androl (2010) 0.83
Antibodies to canine and feline viruses in spotted hyenas (Crocuta crocuta) in the Masai Mara National Reserve. J Wildl Dis (2004) 0.83
Distribution of vasopressin in the forebrain of spotted hyenas. J Comp Neurol (2006) 0.83
Hormonal correlates of changes in interest in unrelated infants across the peripartum period in female baboons (Papio hamadryas anubis sp.). Horm Behav (2004) 0.82
Hormonal mechanisms underlying aberrant sexual differentiation in male rats prenatally exposed to alcohol, stress, or both. Arch Sex Behav (2002) 0.82
Hyena societies. Curr Biol (2007) 0.82
Social factors influence ovarian acyclicity in captive African elephants (Loxodonta africana). Zoo Biol (2009) 0.82
Results of a second survey to assess the reproductive status of female Asian and African elephants in North America. Zoo Biol (2010) 0.82
Social and reproductive factors affecting cortisol levels in wild female golden lion tamarins (Leontopithecus rosalia). Am J Primatol (2005) 0.81
Variation in circulating and excreted estradiol associated with testicular activity in male marmosets. Am J Primatol (2002) 0.81
Sex and the frontal cortex: A developmental CT study in the spotted hyena. Brain Behav Evol (2010) 0.81
Post-partum variation in the expression of paternal care is unrelated to urinary steroid metabolites in marmoset fathers. Horm Behav (2013) 0.81
Coprologic survey of parasites of spotted hyenas (Crocuta crocuta) in the Masai Mara National Reserve, Kenya. J Wildl Dis (2003) 0.81
Virtual endocasts: an application of computed tomography in the study of brain variation among hyenas. Ann N Y Acad Sci (2011) 0.80
The first anniversary: stress, well-being, and optimism in older widows. West J Nurs Res (2009) 0.80
Induction of the ovulatory LH surge in Asian elephants (Elephas maximus): a novel aid in captive breeding management of an endangered species. Reprod Fertil Dev (2009) 0.80
Behavioral responses to social separation stressor change across development and are dynamically related to HPA activity in marmosets. Am J Primatol (2013) 0.80
Gestational cortisol and social play shape development of marmosets' HPA functioning and behavioral responses to stressors. Dev Psychobiol (2014) 0.80
Development of a hyena immunology toolbox. Vet Immunol Immunopathol (2011) 0.80
Maternal gestational androgens are associated with decreased juvenile play in white-faced marmosets (Callithrix geoffroyi). Horm Behav (2012) 0.80
Exploring the ecologic basis for extreme susceptibility of Pallas' cats (Otocolobus manul) to fatal toxoplasmosis. J Wildl Dis (2005) 0.79
Effects of varying amounts of pronation on the mediolateral ground reaction forces during barefoot versus shod running. J Appl Biomech (2010) 0.79
Lifetime selection on a hypoallometric size trait in the spotted hyena. Proc Biol Sci (2011) 0.79
Reproductive gonadal steroidogenic activity in the fishing cat (Prionailurus viverrinus) assessed by fecal steroid analyses. Anim Reprod Sci (2011) 0.79
Pretreatment of Asian elephant (Elephas maximus) spermatozoa with cholesterol-loaded cyclodextrins and glycerol addition at 4°C improves cryosurvival. Reprod Fertil Dev (2012) 0.79
Effects of a gonadotropin-releasing hormone vaccine on ovarian cyclicity and uterine morphology of an Asian elephant (Elephas maximus). J Zoo Wildl Med (2012) 0.79
Relaxin concentrations in serum and urine of endangered species: correlations with physiologic events and use as a marker of pregnancy. Ann N Y Acad Sci (2005) 0.79
Describing ovarian cycles, pregnancy characteristics, and the use of contraception in female white-faced marmosets, Callithrix geoffroyi. Am J Primatol (2012) 0.78
Decreased baseline fecal glucocorticoid concentrations associated with skin and oral lesions in black rhinoceros (Diceros bicornis). J Zoo Wildl Med (2010) 0.78
Natural variation in gestational cortisol is associated with patterns of growth in marmoset monkeys (Callithrix geoffroyi). Gen Comp Endocrinol (2011) 0.78
Ultrasonic measurements of second and third trimester fetuses to predict gestational age and date of parturition in captive and wild spotted hyenas Crocuta crocuta. Theriogenology (2002) 0.78
Female marmosets' behavioral and hormonal responses to unfamiliar intruders. Am J Primatol (2011) 0.78
Lactotransferrin in Asian elephant (Elephas maximus) seminal plasma correlates with semen quality. PLoS One (2013) 0.78
High rates of pregnancy loss by subordinates leads to high reproductive skew in wild golden lion tamarins (Leontopithecus rosalia). Horm Behav (2013) 0.78
Serotonin function is associated with behavioral response to a novel conspecific in marmosets. Am J Primatol (2006) 0.77
Characterizing gonadal and adrenal activity by fecal steroid analyses in pygmy rabbits (Brachylagus idahoensis). Gen Comp Endocrinol (2011) 0.77
Diagnosing pregnancy in free-ranging dugongs using fecal progesterone metabolite concentrations and body morphometrics: a population application. Gen Comp Endocrinol (2012) 0.77
Investigating the impact of rank and ovarian activity on the social behavior of captive female African elephants. Zoo Biol (2010) 0.77
Assessment of buprenorphine, carprofen, and their combination for postoperative analgesia in olive baboons (Papio anubis). J Am Assoc Lab Anim Sci (2007) 0.77
Reproductive science as an essential component of conservation biology. Adv Exp Med Biol (2014) 0.77
Influence of the mother's reproductive state on the hormonal status of daughters in marmosets (Callithrix kuhlii). Am J Primatol (2004) 0.77
Using behavioral observations and keeper questionnaires to assess social relationships among captive female African elephants. Zoo Biol (2010) 0.77
The anti-androgen combination, flutamide plus finasteride, paradoxically suppressed LH and androgen concentrations in pregnant spotted hyenas, but not in males. Gen Comp Endocrinol (2010) 0.76
Hyperprolactinemia is not associated with hyperestrogenism in noncycling African elephants (Loxodonta africana). Gen Comp Endocrinol (2013) 0.76
Recurrence of hyperprolactinemia and continuation of ovarian acyclicity in captive African elephants (Loxodonta africana) treated with cabergoline. J Zoo Wildl Med (2014) 0.76
Ontogenetic relationships between cranium and mandible in coyotes and hyenas. J Morphol (2011) 0.76
Characterization of Toll-like receptors 1-10 in spotted hyenas. Vet Res Commun (2014) 0.76
Use of genital inspection and female urine tests to detect oestrus in captive Asian elephants. Anim Reprod Sci (2008) 0.75
Interleukin-6 and delayed onset muscle soreness do not vary during the menstrual cycle. Res Q Exerc Sport (2011) 0.75
Female parity, male aggression, and the Challenge Hypothesis in wild chimpanzees. Primates (2012) 0.75