Hormones and Behavior

Article	Citations
Is testosterone linked to human aggression? A meta-analytic examination of the relationship between baseline, dynamic, and manipulated testosterone on human aggression	89
Through a glass, darkly: Human digit ratios reflect prenatal androgens, imperfectly	60
What is a pair bond?	49
Estrogenic regulation of memory: The first 50 years	48
Sexual differentiation of brain and other tissues: Five questions for the next 50 years	44
How research on female vertebrates contributes to an expanded challenge hypothesis	42
Use of the birth control pill affects stress reactivity and brain structure and function	41
Digit ratio (2D:4D) and congenital adrenal hyperplasia (CAH): Systematic literature review and meta-analysis	38
The stress of being alone: Removal from the colony, but not social subordination, increases fecal cortisol metabolite levels in eusocial naked mole-rats	37
Type of early life adversity confers differential, sex-dependent effects on early maturational milestones in mice	34
Who rises to the challenge? Testing the Challenge Hypothesis in fish, amphibians, reptiles, and mammals	32
Beyond the challenge hypothesis: The emergence of the dual-hormone hypothesis and recommendations for future research	31
Human reproductive behavior, life history, and the Challenge Hypothesis: A 30-year review, retrospective and future directions	28
Sex-dependent effects of social status on the regulation of arginine-vasopressin (AVP) V1a, oxytocin (OT), and serotonin (5-HT) 1A receptor binding and aggression in Syrian hamsters (Mesocricetus aura	26
Facing off with the phalangeal phenomenon and editorial policies: A commentary on Swift-Gallant, Johnson, Di Rita and Breedlove (2020)	26
Mothering revisited: A role for cortisol?	24
A longitudinal evaluation of ovulatory cycle shifts in women's mate attraction and preferences	24
Higher dominance rank is associated with lower glucocorticoids in wild female baboons: A rank metric comparison	24
The effect of HF-rTMS over the left DLPFC on stress regulation as measured by cortisol and heart rate variability	23
Aggression, glucocorticoids, and the chronic costs of status competition for wild male chimpanzees	23
Sex chromosome complement influences vulnerability to cocaine in mice	22
How prior pair-bonding experience affects future bonding behavior in monogamous prairie voles	22
The behavioral neuroendocrinology of maternal behavior: Past accomplishments and future directions	22
Maternal exposure to organophosphate flame retardants alters locomotor and anxiety-like behavior in male and female adult offspring	22
Testosterone reactivity to competition and competitive endurance in men and women	22

Central and peripheral leptin resistance in obesity and improvements of exercise	22
Oxytocin, vasopressin and social behavior in the age of genome editing: A comparative perspective	21
Sex differences in vasopressin 1a receptor regulation of social communication within the lateral habenula and dorsal raphe of mice	20
Endocrine and neuroendocrine regulation of social status in cichlid fishes	20
Temporal and bidirectional influences of estradiol on voluntary wheel running in adult female and male rats	20
Functional evolution of vertebrate sensory receptors	20
Distributed physiology and the molecular basis of social life in eusocial insects	20
Oxytocin reverses ethanol consumption and neuroinflammation induced by social defeat in male mice	20
Perinatal exposure to FireMaster® 550 (FM550), brominated or organophosphate flame retardants produces sex and compound specific effects on adult Wistar rat socioemotional behavior	19
The challenge hypothesis revisited: Focus on reproductive experience and neural mechanisms	19
Aggression: Perspectives from social and systems neuroscience	19
Dopamine and serotonin mediate the impact of stress on cleaner fish cooperative behavior	19
Variation in aggression rates and urinary cortisol levels indicates intergroup competition in wild bonobos	19
Hypothalamus-pituitary-adrenal axis imbalance and inflammation contribute to sex differences in separation- and restraint-induced depression	19
Endocrine changes related to dog domestication: Comparing urinary cortisol and oxytocin in hand-raised, pack-living dogs and wolves	19
High housing density increases stress hormone- or disease-associated fecal microbiota in male Brandt's voles (Lasiopodomys brandtii)	19
Testosterone administration in human social neuroendocrinology: Past, present, and future	19
Oral contraceptive use, especially during puberty, alters resting state functional connectivity	19
Testosterone synthesis in the female songbird brain	19
Vasopressin regulates daily rhythms and circadian clock circuits in a manner influenced by sex	18
Risk-based decision making in rats: Modulation by sex and amphetamine	18
Hormonal and neural correlates of care in active versus observing poison frog parents	18
No evidence for a difference in 2D:4D ratio between youth with elevated prenatal androgen exposure due to congenital adrenal hyperplasia and controls	18
Oxytocin increases the social salience of the outgroup in potential threat contexts	18
Juvenile hormone regulates brain-reproduction tradeoff in bumble bees but not in honey bees	17
Neuroendocrine coordination and youth behavior problems: A review of studies assessing sympathetic nervous system and hypothalamic-pituitary adrenal axis activity using salivary alpha amylase and sali	17
Social network dynamics predict hormone levels and behavior in a highly social cichlid fish	17
The role of dopamine signaling in prairie vole peer relationships	17
Differential effects of progesterone on social recognition and the avoidance of pathogen threat by female mice	17
Adolescent social instability stress leads to immediate and lasting sex-specific changes in the neuroendocrine-immune-gut axis in rats	16
A consideration of brain networks modulating social behavior	16
Social stress and glucocorticoids alter PERIOD2 rhythmicity in the liver, but not in the suprachiasmatic nucleus	16
Juvenile hormone functions as a metabolic rate accelerator in bumble bees (Bombus terrestris)	16
Auditory learning in an operant task with social reinforcement is dependent on neuroestrogen synthesis in the male songbird auditory cortex	16
Estradiol treatment attenuates high fat diet-induced microgliosis in ovariectomized rats	16
Becoming a better parent: Mice learn sounds that improve a stereotyped maternal behavior	16
Disruption of global hypothalamic microRNA (miR) profiles and associated behavioral changes in California mice (Peromyscus californicus) developmentally exposed to endocrine disrupting chemicals	16
Identifying stress-related eating in behavioural research: A review	15
Nesting strategy shapes territorial aggression but not testosterone: A comparative approach in female and male birds	15
Prenatal androgen exposure and children's gender-typed behavior and toy and playmate preferences	15
Physiological responses of host parents to rearing an avian brood parasite: An experimental study	15
Sex differences in seasonal brain plasticity and the neuroendocrine regulation of vocal behavior in songbirds	15
Diel variation in corticosterone and departure decision making in migrating birds	15
Dynamics and determinants of glucocorticoid metabolite concentrations in wild Verreaux's sifakas	15
Mathematical modeling reveals how the speed of endocrine regulation should affect baseline and stress-induced glucocorticoid levels	15
Oxytocin receptor antagonist reverses the blunting effect of pair bonding on fear learning in monogamous prairie voles	14
Whither the challenge hypothesis?	14
Galanin neuron activation in feeding, parental care, and infanticide in a mouthbrooding African cichlid fish	14
Social boldness correlates with brain gene expression in male green anoles	14
Characterizing the effects of tonic 17β-estradiol administration on spatial learning and memory in the follicle-deplete middle-aged female rat	14

Central oxytocin signaling inhibits food reward-motivated behaviors and VTA dopamine responses to food-predictive cues in male rats	14
The challenge hypothesis in insects	14
Activation of G-protein coupled estradiol receptor 1 in the dorsolateral striatum attenuates preference for cocaine and saccharin in male but not female rats	14
Glucoregulation and coping behavior after chronic stress in rats: Sex differences across the lifespan	13
Convergent neuroendocrine mechanisms of social buffering and stress contagion	13
Triiodothyronine and cortisol levels in the face of energetic challenges from reproduction, thermoregulation and food intake in female macaques	13
Consequences of temperature-induced sex reversal on hormones and brain in Nile tilapia (Oreochromis niloticus)	13
Early experience alters developmental trajectory of central oxytocin systems involved in hypothalamic-pituitary-adrenal axis regulation in Long-Evans rats	13
Rank- and sex-specific differences in the neuroendocrine regulation of glucocorticoids in a wild group-living fish	13
Long term effects of chronic intranasal oxytocin on adult pair bonding behavior and brain glucose uptake in titi monkeys (Plecturocebus cupreus)	13
Progesterone rapidly alters the use of place and response memory during spatial navigation in female rats	13
Long-term oral administration of a novel estrogen receptor beta agonist enhances memory and alleviates drug-induced vasodilation in young ovariectomized mice	12
Oxytocin has sex-specific effects on social behaviour and hypothalamic oxytocin immunoreactive cells but not hippocampal neurogenesis in adult rats	12
Functional differences in the hypothalamic-pituitary-gonadal axis are associated with alternative reproductive tactics based on an inversion polymorphism	12
FKBP5 expression is related to HPA flexibility and the capacity to cope with stressors in female and male house sparrows	12
Key role of estrogen receptor β in the organization of brain and behavior of the Japanese quail	12
Endocrine stress responsivity and social memory in 3xTg-AD female and male mice: A tale of two experiments	12
Early social experience has life-long effects on baseline but not stress-induced cortisol levels in a cooperatively breeding fish	12
Pubertal recalibration of cortisol-DHEA coupling in previously-institutionalized children	12
Neural programming of seasonal physiology in birds and mammals: A modular perspective	12
Effects of aging on testosterone and androgen receptors in the mesocorticolimbic system of male rats	12
Effects of adult male rat feminization treatments on brain morphology and metabolomic profile	12
Effects of light pollution on photoperiod-driven seasonality	12
Invasive alien species as an environmental stressor and its effects on coping style in a native competitor, the Eurasian red squirrel	11
The effects of food supply on reproductive hormones and timing of reproduction in an income-breeding seabird	11
Corticosterone's roles in avian migration: Assessment of three hypotheses	11
Nuclear androgen and progestin receptors inversely affect aggression and social dominance in male zebrafish (Danio rerio)	11
Group size, temperature and body size modulate the effects of social hierarchy on basal cortisol levels in fishes	11
Estrogen and sex-dependent loss of the vocal learning system in female zebra finches	11
The neuroendocrine integration of environmental information, the regulation and action of testosterone and the challenge hypothesis	11
Specificity in sociogenomics: Identifying causal relationships between genes and behavior	11
Oxytocin receptor behavioral effects and cell types in the bed nucleus of the stria terminalis	11
Acute aggressive behavior perturbates the oxidative status of a wild bird independently of testosterone and progesterone	11
Trait-related changes in brain network topology in premenstrual dysphoric disorder	11
An examination of the influence of prenatal sex hormones on handedness: Literature review and amniotic fluid data	11
Hormonal, reproductive, and behavioural predictors of fear extinction recall in female rats	11
Changes in maternal motivation across reproductive states in mice: A role for prolactin receptor activation on GABA neurons	11
Endogenous oxytocin, cortisol, and testosterone in response to group singing	11
Androgens and corticosteroids increase in response to mirror images and interacting conspecifics in males of the Siamese fighting fish Betta splendens	11
Hormones, ovulatory cycle phase and pathogen disgust: A longitudinal investigation of the Compensatory Prophylaxis Hypothesis	11
Effects of testosterone therapy on constructs related to aggression in transgender men: A systematic review	11
Nonapeptides mediate trade-offs in parental care strategy	10
Do female bonobos (Pan paniscus) disperse at the onset of puberty? Hormonal and behavioral changes related to their dispersal timing	10
The serotonin 1A receptor modulates the social behaviour within groups of a cooperatively-breeding cichlid	10
Life history and individual differences in male testosterone: Mixed evidence for early environmental calibration of testosterone response to first-time fatherhood	10
Testosterone-related behavioral and neural mechanisms associated with location preferences: A model for territorial establishment	10
Glucocorticoids in a warming world: Do they help birds to cope with high environmental temperatures?	10
Reduction in vasopressin cells in the suprachiasmatic nucleus in mice increases anxiety and alters fluid intake	10
Inside the supergene of the bird with four sexes	10
The role of D2 dopamine receptors in oxytocin induced place preference and anxiolytic effect	10
A retrospective view of early research on dominance, stress and reproduction in cooperatively breeding carnivores	10
Family environmental antecedents of pubertal timing in girls and boys: A review and open questions	10
Uncovering the seasonal brain: Liquid chromatography-tandem mass spectrometry (LC-MS/MS) as a biochemical approach for studying seasonal social behaviors	10
Activation of the amylin pathway modulates cocaine-induced activation of the mesolimbic dopamine system in male mice	10
The endocrine control of reproductive suppression in an aseasonally breeding social subterranean rodent, the Mahali mole-rat (Cryptomys hottentotus mahali)	10
Reprint of “Concepts derived from the Challenge Hypothesis”	10
Neonatal nutritional programming induces gliosis and alters the expression of T-cell protein tyrosine phosphatase and connexins in male rats	10
Zebra finches bi-directionally selected for personality differ in repeatability of corticosterone and testosterone	10
Going wild for functional genomics: RNA interference as a tool to study gene-behavior associations in diverse species and ecological contexts	10
Timing of peripubertal steroid exposure predicts visuospatial cognition in men: Evidence from three samples	9
Rising to the challenge? Inter-individual variation of the androgen response to social interactions in cichlid fish	9
HIV-1 Tat and morphine decrease murine inter-male social interactions and associated oxytocin levels in the prefrontal cortex, amygdala, and hypothalamic paraventricular nucleus	9
Altered attention networks in patients with thyroid dysfunction: A neuropsychological study	9
Glucocorticoid receptor expression as an integrative measure to assess glucocorticoid plasticity and efficiency in evolutionary endocrinology: A perspective	9
Arginine vasotocin impacts chemosensory behavior during social interactions of Anolis carolinensis lizards	9
An evolutionary perspective on stress responses, damage and repair	9
Elevated prenatal maternal sex hormones, but not placental aromatase, are associated with child neurodevelopment	9
Glucocorticoids and activity in free-living arctic ground squirrels: Interrelationships between weather, body condition, and reproduction	9
Disparities in the toll of the COVID-19 pandemic on publishing: Evidence from submissions to Hormones and Behavior	9
Energetics at the urban edge: Environmental and individual predictors of urinary C-peptide levels in wild chacma baboons (Papio ursinus)	9
Aggressive but not reproductive boldness in male green anole lizards correlates with baseline vasopressin activity	9
Maternal stress and the maternal microbiome have sex-specific effects on offspring development and aggressive behavior in Siberian hamsters (Phodopus sungorus)	9
Individuality meets plasticity: Endocrine phenotypes across male dominance rank acquisition in guinea pigs living in a complex social environment	9
Genetic dissection of steroid-hormone modulated social behavior: Novel paralogous genes are a boon for discovery	8
Effects of timed food availability on reproduction and metabolism in zebra finches: Molecular insights into homeostatic adaptation to food-restriction in diurnal vertebrates	8
Food cue-elicited brain potentials change throughout menstrual cycle: Modulation by eating styles, negative affect, and premenstrual complaints	8
Expanding the frame around social dynamics and glucocorticoids: From hierarchies within the nest to competitive interactions among species	8
Experimental ghrelin administration affects migratory behaviour in a songbird	8
Social status mediated variation in hypothalamic transcriptional profiles of male mice	8
Treatment with androgens plus estrogens cannot reverse sex differences in song and the song control nuclei in adult canaries	8

FireMaster® 550 (FM 550) exposure during the perinatal period impacts partner preference behavior and nucleus accumbens core medium spiny neuron electrophysiology in adult male and female prairie vole	8
Plasma levels of ghrelin and GLP-1, but not leptin or amylin, respond to a psychosocial stressor in women and men	8
Changes in nucleus accumbens gene expression accompany sex-specific suppression of spontaneous physical activity in aromatase knockout mice	8
The onset of puberty in colony-housed male and female titi monkeys (Plecturocebus cupreus): Possible effects of oxytocin treatment during peri-adolescent development	8
Chronic treatment with hormonal contraceptives alters hippocampal BDNF and histone H3 post-translational modifications but not learning and memory in female rats	8
Effects of neuromedin U-8 on stress responsiveness and hypothalamus-pituitary-adrenal axis activity in male C57BL/6J mice	8
Effects of the social environment on vertebrate fitness and health in nature: Moving beyond the stress axis	8
Adrenal MT1 melatonin receptor expression is linked with seasonal variation in social behavior in male Siberian hamsters	8
A cross-taxonomic perspective on the integration of temperature cues in vertebrate seasonal neuroendocrine pathways	8
The glucocorticoid response to environmental change is not specific to agents of natural selection in wild red squirrels	8
Male White-shouldered Fairywrens (Malurus alboscapulatus) elevate androgens greater when courting females than during territorial challenges	8
Olfactory detection of trace amounts of plant volatiles is correlated with testosterone in a passerine bird	8
Bidirectional effects of estradiol on the control of water intake in female rats	8
Impact of bisphenol-A and synthetic estradiol on brain, behavior, gonads and sex hormones in a sexually labile coral reef fish	8
Conditional inactivation of Npy1r gene in mice induces sex-related differences of metabolic and behavioral functions	8
Neural control of female sexual behaviors	8
A longitudinal investigation of bidirectional and time-dependent interrelationships between testosterone and training motivation in an elite rugby environment	8
Norepinephrine and dopamine contribute to distinct repetitive behaviors induced by novel odorant stress in male and female mice	8
Leptin predicts cortical and subcortical gray matter volume recovery in alcohol dependent patients: A longitudinal structural magnetic resonance imaging study	7
APOE4 genotype or ovarian hormone loss influence open field exploration in an EFAD mouse model of Alzheimer's disease	7
Evolutionary endocrinology and the problem of Darwin's tangled bank	7
The glucagon-like peptide-1 receptor agonist, exendin-4, reduces sexual interaction behaviors in a brain site-specific manner in sexually naïve male mice	7
Social status mediates behavioral, endocrine, and neural responses to an intruder challenge in a social cichlid, Astatotilapia burtoni	7
Does physical activity associated with chronic food restriction alleviate anxiety like behaviour, in female mice?	7
Frank Beach Award Winner: The centrality of the hypothalamic-pituitary-adrenal axis in dealing with environmental change across temporal scales	7
Postpartum environmental challenges alter maternal responsiveness and offspring development	7
Socioemotional deficit and HPA axis time response in high compulsive rats selected by schedule-induced polydipsia	7
Relationships between ovarian hormone concentrations and mental rotations performance in naturally-cycling women	7
Alterations in corticotropin-releasing factor receptor type 1 in the preoptic area and hypothalamus in mice during the postpartum period	7
Effects of DEHP on the ecdysteroid pathway, sexual behavior and offspring of the moth Spodoptera littoralis	7
Intergenerational effects of paternal predator cue exposure on behavior, stress reactivity, and neural gene expression	7
Progesterone does raise disgust	7
Oxytocin and CD38 in the paraventricular nucleus play a critical role in paternal aggression in mice	7
Elevated corticosterone levels are associated with increased immunocompetence in male toads, both when calling and under experimental conditions	7
The endocannabinoid system is affected by a high-fat-diet in rainbow trout	7
Alamandine through MrgD receptor induces antidepressant-like effect in transgenic rats with low brain angiotensinogen	7
Deconstructing sex: Strategies for undoing binary thinking in neuroendocrinology and behavior	7
Central administration of endocannabinoids exerts bimodal effects in food intake of rainbow trout	7
Lack of association of common polymorphisms linked to empathic behavior with self-reported trait empathy in healthy volunteers	7
Sex difference in human olfactory sensitivity is associated with plasma adiponectin	7
Aldosterone hyperreactivity to acute psychosocial stress induction in men with essential hypertension	7
Glutamate transporter-1 link astrocytes with heightened aggressive behavior induced by steroid abuse in male CF1 mice	7
The effect of testosterone on economic risk-taking: A multi-study, multi-method investigation	7
The roles of GnRH in the human central nervous system	6
Preliminary evidence that oxytocin does not improve mentalizing in women with schizophrenia	6
Cortisol and testosterone concentrations during the prenatal and postpartum period forecast later caregiving quality in mothers and fathers	6
Inhibition of progesterone receptor activity during development increases reelin-immunoreactivity in Cajal-Retzius cells, alters synaptic innervation in neonatal dentate gyrus, and impairs episodic-li	6
Frank Beach Award Winner: Lessons from poison frogs on ecological drivers of behavioral diversification	6
Evolution of hormone-phenotype couplings and hormone-genome interactions	6
An updated field guide for snark hunting: Comparative contributions to behavioral neuroendocrinology in the era of model organisms	6
Reducing cultural mismatch: Latino students' neuroendocrine and affective stress responses following cultural diversity and inclusion reminder	6
Functional inhibition of deep brain non-visual opsins facilitates acute long day induction of reproductive recrudescence in male Japanese quail	6
Moderately elevated glucocorticoids increase mate choosiness but do not affect sexual proceptivity or preferences in female gray treefrogs	6
Oxytocin and ‘social hyperthermia’: Interaction with β3-adrenergic receptor-mediated thermogenesis and significance for the expression of social behavior in male and female mice	6
Endocrinological effects of social exclusion and inclusion: Experimental evidence for adaptive regulation of female fecundity	6
Developing a Stopover-CORT hypothesis: Corticosterone predicts body composition and refueling rate in Gray Catbirds during migratory stopover	6
Baseline corticosterone is associated with parental care in virgin Japanese quail (Coturnix japonica)	6
Effects of gonadal status and the estrogen milieu on hypothalamic oxytocin gene expression and serum oxytocin levels in female rats	6
Using seasonality and birdsong to understand mechanisms underlying context-appropriate shifts in social motivation and reward	6
Central but not peripheral oxytocin administration reduces risk-based decision-making in male rats	6
BDNF Val66Met genotype and adolescent glucocorticoid treatment induce sex-specific disruptions to fear extinction and amygdala GABAergic interneuron expression in mice	6
Changes in prenatal testosterone and sexual desire in expectant couples	6
Estradiol withdrawal following a hormone simulated pregnancy induces deficits in affective behaviors and increases ∆FosB in D1 and D2 neurons in the nucleus accumbens core in mice	6
Covariation between glucocorticoid levels and receptor expression modulates embryo development and postnatal phenotypes in gulls	6
Interactive effects of compounding multidimensional stressors on maternal and male and female rat offspring outcomes	6
Gene expression in the female tree swallow brain is associated with inter- and intra-population variation in glucocorticoid levels	6
Leptin at birth and at age 7 in relation to appetitive behaviors at age 7 and age 10	6
Factors modulating the behavioral and physiological stress responses: Do they modify the relationship between flight initiation distance and corticosterone reactivity?	6
The relative speed of the glucocorticoid stress response varies independently of scope and is predicted by environmental variability and longevity across birds.	6
Oxytocin induces lordosis behavior in female rats through the prostaglandin E2/GnRH signaling system	6
Testosterone, cortisol, and criminal behavior in men and women	5
Methylation of OXT and OXTR genes, central oxytocin, and social behavior in female macaques	5
Sex diversity in the 21st century: Concepts, frameworks, and approaches for the future of neuroendocrinology	5
Developmental conditions have intergenerational effects on corticosterone levels in a passerine	5
The selective estrogen receptor modulator tamoxifen protects against subtle cognitive decline and early markers of injury 24 h after hippocampal silent infarct in male Sprague-Dawley rats	5
Estradiol attenuates chronic restraint stress-induced dendrite and dendritic spine loss and cofilin1 activation in ovariectomized mice	5
Hormone contraceptive use in young women: Altered mood states, neuroendocrine and inflammatory biomarkers	5
Individual differences in hormonal responsiveness to social encounters: Commentary on Félix et al., 2020 and review of pertinent issues	5
Neural mechanisms of comforting: Prosocial touch and stress buffering	5
Longitudinal associations between prenatal testosterone and postpartum outcomes in a sample of first-time expectant lesbian couples	5
Maternal deprivation during early infancy in rats increases oxytocin immunoreactivity in females and corticosterone reactivity to a social test in both sexes without changing emotional behaviour	5
Stable and persistent male-like behavior during male-to-female sex change in the common clownfish Amphiprion ocellaris	5
Major role of MT2 receptors in the beneficial effect of melatonin on long-term recognition memory in C57BL/6J male mice	5
Sex steroids modulate circadian behavioral rhythms in captive animals, but does this matter in the wild?	5
Oxytocinergic system mediates the proconvulsant effects of sildenafil: The role of calcineurin	5
The role of sex chromosomes and sex hormones in vocal learning systems	5
A causal role of estradiol in human reinforcement learning	5
Social sleepers: The effects of social status on sleep in terrestrial mammals	5
A single GnRH challenge promotes paternal care, changing nestling growth for one day	5
Functional genomics of parental care of insects	5
Brain-derived neurotrophic factor (BDNF) affects the activity of the gonadotrophic axis in sheep	5
Prolactin promotes parental responses and alters reproductive axis gene expression, but not courtship behaviors, in both sexes of a biparental bird	5
Exogenous testosterone decreases men's sensitivity to vocal cues of male dominance	5
Sex differences in aggressive intensities and brain steroids during status resolution in a sex changing fish, Lythrypnus dalli	5
Ovarian cyclicity and prolactin status of African elephants (Loxodonta africana) in North American zoos may be influenced by life experience and individual temperament	5