• 2023. Social play experience in juvenile rats is indispensable for appropriate socio-sexual behavior in adulthood in males but not females. (awionline.org)
  • Here we aimed to determine if Japanese macaque males use changes in female sexual signals (behavioral, visual and auditory) to discriminate pregnancy and adjust their socio-sexual behaviors. (plos.org)
  • We analyzed variation in the probability of detecting male and female socio-sexual behaviors and estrus calls, as well as changes in female face color parameters, in relation to female reproductive state. (plos.org)
  • Based on our focal observations, we found that males did not copulate during the pregnancy period, and that female socio-sexual behaviors generally decreased from the pre-conceptive to post-conceptive periods. (plos.org)
  • Non-reproductive sexual behavior consists of sexual activities animals participate in that do not lead to the reproduction of the species. (wikipedia.org)
  • Several species utilize sexual activity as a way to resolve disagreement. (wikipedia.org)
  • Bonobos are one species famously known for using sexual behavior as a means of resolution of social conflict. (wikipedia.org)
  • Scientists have witnessed the mating behavior of only about a dozen species, she added. (livescience.com)
  • In this species, a male will guard a female from other males, typically while staying in a den in tentacle's reach of the female's den. (livescience.com)
  • In one deep-sea species, Graneledone boreopacifica , females may brood over their eggs for up to 4.5 years without ever leaving to eat. (livescience.com)
  • Some animals, when given a choice, show a preference for the same sex, and researchers have even ascribed a same-sex sexual orientation to members of certain species. (popsci.com)
  • These alliances help females of the species reproduce earlier than chimps, leading to higher lifetime reproduction success. (popsci.com)
  • Males of this species form lifelong same-sex pair bonds around the age of 10, and don't father calves with females until they are 20- to 25-years-old. (popsci.com)
  • This behavior, called sexual selection infanticide, has been observed in several other large carnivore species, including lions and bears. (biggame.org)
  • We all know that pheromones are chemicals released by an animal or an insect that alters the behavior of another animal or insect of the same species. (std-gov.org)
  • While it is an established fact that pheromones do compel animals and insects mate with each other of the same species, it is still a question whether the same theory applies for humans also. (std-gov.org)
  • To put more emphasis on the fact that hormones do affect the other partner of the same species, a test was conducted in which women's tears were directly placed under men's noses to prove the fact that doing so would decrease their testosterone levels and sexual arousal. (std-gov.org)
  • A pheromone is a type of chemical produced by an animal that changes the behavior of another animal of the same species. (truepheromones.com)
  • Organisms of many species are specialized into male and female varieties, each known as a sex . (artandpopularculture.com)
  • Multiplicity of gamete types within a species would still be considered a form of sexual reproduction. (artandpopularculture.com)
  • The study showed that male harassment of females hampered the species' ability to adapt to new environmental conditions. (sciencedaily.com)
  • Associate Professor Steve Chenoweth from The University of Queensland's School of Biological Sciences said the study showed that male harassment of females hampered the species' ability to adapt to new environmental conditions. (sciencedaily.com)
  • He said future directions for the study included pinpointing the exact types of gene functions involved and to understanding the broader consequences of male-female interactions and their relevance to the evolutionary history of other species. (sciencedaily.com)
  • Some estimates put the number of animal species that practice same-sex coupling at 1,500. (foxnews.com)
  • No one has studied the behavior of the species so we can only guess," answered Emily Meijaard. (mongabay.com)
  • 2023. Home-cage behavior is impacted by stress exposure in rats. (awionline.org)
  • 2023. Housing conditions affect adult zebrafish (Danio rerio) behavior but not their physiological status. (awionline.org)
  • 2023. Effects of genotype and housing system on rabbit does' aggressive behaviors and injuries in smallholding conditions. (awionline.org)
  • We studied the influence of aggressive behavior, reproductive status, and mobility of bank voles on the prevalence of PUUV infection. (cdc.gov)
  • Our results suggest that Japanese macaque females display sexual cues of pregnancy that males might use to reduce energy wasted on non-reproductive copulations with pregnant females. (plos.org)
  • Primate males usually concentrate their reproductive efforts towards females during the period of highest conception probability, i.e. the peri-ovulatory or fertile phase of the menstrual cycle [ 1 - 5 ]. (plos.org)
  • However, many of these reports were based on observations of mounts, either with or without intromission and ejaculation, collected unsystematically, with inferences made about female reproductive state in the absence of endocrinological confirmation of pregnancy. (plos.org)
  • Several hypotheses have been suggested to explain the occurrence and the role of these copulatory behaviors during non-reproductive periods. (plos.org)
  • these sexual dimorphisms can reflect the different reproductive pressures the sexes experience. (artandpopularculture.com)
  • The number of males in animal groups is an essential determinant of male and female reproductive strategies. (uni-wuerzburg.de)
  • Gregarious Malagasy lemurs deviate from theoretical expectations derived from sexual selection theory and from patterns found among anthropoids because they live in relatively small groups with an even or The number of males in animal groups is an essential determinant of male and female reproductive strategies. (uni-wuerzburg.de)
  • Although there are many males in the group, the alpha usually monopolizes all reproductive females and all the other youngsters (Pope, 1990). (bvsalud.org)
  • Androgen excess is the most common endocrine disorder in women of reproductive age. (medscape.com)
  • Female bonobos have been observed to engage in sexual activities to create bonds with dominant bonobos. (wikipedia.org)
  • In addition, bonobos need not limit themselves to a single partner: "These bonds need not be exclusive - either party may have sex with other females or males - but such mentorlike pairings can last for a year or more until the newcomer is fully integrated into the troop. (wikipedia.org)
  • Social pairings between youth and adult bonobos happen across gender combinations: "Both adult males and females interact sexually with adolescents and juveniles (three-to-nine-year-olds). (wikipedia.org)
  • Same-sex sexual behavior is well documented in monkeys and apes, and bonobos, our closest relatives (alongside chimps) are a study in bisexuality. (popsci.com)
  • Female bonobos partake in same-sex genital rubbing once every two hours or so, often leading to orgasm, Stanford University biologist Joan Roughgarden writes in Evolution's Rainbow: Diversity, Gender, and Sexuality in Nature and People, and an average of two thirds of their sexual encounters are with other females. (popsci.com)
  • Using behavioral and hormonal data from a habituated bonobo community at the long-term LuiKotale field site in the Democratic Republic of Congo researchers from the Max Planck Institute for Evolutionary Anthropology, Harvard University and the Leibniz Institute for Farm Animal Biology have now shown that same-sex sexual behavior in female bonobos increases friendly social interactions, including cooperation. (mpg.de)
  • Plenty of animals are out of the closet , so to speak, from dolphins and killer whales to bonobos and greylag geese. (foxnews.com)
  • In the first of a set of four studies I investigated the applicability of non-invasive endocrine measurements for monitoring ovarian function in wild redfronted lemur females in order to evaluate the degree of estrus synchrony. (uni-wuerzburg.de)
  • Estrus first occurs in female cats older than 4 months. (petcarerx.com)
  • Stress and coping mechanisms in female primates. (upenn.edu)
  • Competition for resources and changing ratios between males and females may be responsible for bringing out these behaviors in the primates. (biggame.org)
  • The role of multiple sexual signals in indicating the timing of female ovulation, and discrimination of this timing by males, has been particularly well studied among primates. (plos.org)
  • Due to male intrasexual competition, the sex ratio of groups of anthropoid primates is generally female-biased. (uni-wuerzburg.de)
  • Inspired by evolutionary theory, the preparation hypothesis has been forwarded to explain a common finding in sex research: that genital arousal in women can be automatically activated in response to a variety of sexual stimuli that are non-specific in terms of sexual attraction (Suschinsky & Lalumière, 2011 ). (springer.com)
  • The preparation hypothesis is unclear about the (evolutionary adaptive) function of subjective sexual arousal and how this relates to genital arousal. (springer.com)
  • An evolutionary advantage is harder to theorize for female Japanese macaques, which don't seem to use gay sex to form alliances, to get parenting help, as an expression of dominance or submission, or because opposite sex partners are scarce. (popsci.com)
  • From an evolutionary perspective, you might be forgiven for thinking that it would be advantageous not to have a refractory period - that way a male could go on to impregnate more females and thus increase his chances of passing on his genes to the next generation. (discovermagazine.com)
  • Once more, the ultimate mechanism of all this "cloying" is likely to be found in the adaptive advantage gained by turning some proportion of male sexual energy toward new exploits and thus, more potential evolutionary success. (salon.com)
  • Evolutionary Explanations For Behavior Make Something Great /tutorialoutletdotcom - FOR MORE CLASSES VISIT www.tutorialoutlet.com Evolutionary explanations for behavior make some people uncomfortable because we like to think that we do things because we want to, or because they're good, etc. (powershow.com)
  • Animals have been observed to engage in sex for social interaction bonding, exchange for significant materials, affection, mentorship pairings, sexual enjoyment, or as demonstration of social rank. (wikipedia.org)
  • This isn't the first time we've found animals engaging, or attempting to engage, in interspecies coitus. (smithsonianmag.com)
  • In addition to animals, plants, and fungi, other eukaryotes (e.g. the malaria parasite) also engage in sexual reproduction. (artandpopularculture.com)
  • In his most famous experiment in the series, " Universe 25 ", population peaked at 2,200 mice and thereafter exhibited a variety of abnormal, often destructive, behaviors including refusal to engage in courtship, and females abandoning their young. (wikipedia.org)
  • For example, studies have shown that men are more likely to engage in what are known as "atypical" or "paraphilic" sexual interests. (discovermagazine.com)
  • and persistently attempting to mount and sexually engage a female cat in the household, whether or not she is willing to cooperate. (tuftscatnip.com)
  • Temple and Konstantareas found that persons with DS and AD have less severe psychotic behaviors, fewer hallucinations, and fewer delusions and were more likely to engage in physical movements than those with AD only. (medscape.com)
  • In the presence of mating partners, adult male flies exhibited elevated levels of aggression, which was largely suppressed by prior exposure to females via a sexually dimorphic neural mechanism. (nih.gov)
  • We also determined how overexpression of ΔFosB in the NAc modifies behavioral responses to these natural rewards, and whether previous exposure to one natural reward can enhance other natural rewarding behaviors. (jneurosci.org)
  • Behavior is influenced by multiple factors, including stress exposure, and the expression of the impact. (awionline.org)
  • Inhalation and dermal exposure to CDDs are of lesser concern than oral exposure (because ingestion of CDDs in food is thought to be the principal route of exposure for the general population), but limited information from exposed human and animal studies indicate that CDDs can be absorbed by these routes. (cdc.gov)
  • Psychiatrists went along with this despite the fact that animal research had long shown that male sexual behavior is directly derived from exposure to testosterone in utero. (crosswalk.com)
  • In this case, we did not observe female- or male-specific ensembles or divergent representations in the brain, suggesting that sensory exposure itself was insufficient. (hfg.org)
  • Public health officials and others concerned with appropriate actions to take at hazardous waste sites may want information on levels of exposure associated with more subtle effects in humans or animals (LOAELs) or exposure levels below which no adverse effects (NOAELs) have been observed. (cdc.gov)
  • Some health-care providers have proposed offering antiretroviral drugs to persons with unanticipated sexual or injecting-drug-use HIV exposure to prevent transmission. (cdc.gov)
  • Antiretroviral therapy should never replace adopting and maintaining behaviors that guard against HIV exposure (e.g., sexual abstinence, sex only with an uninfected partner, consistent and correct condom use, abstinence from injecting-drug use, and consistent use of sterile equipment by those unable to cease injecting-drug use). (cdc.gov)
  • Medical treatment after sexual, injecting-drug-use, or other nonoccupational HIV exposure * is likely to be a relatively ineffective method for preventing HIV infection compared with preventing exposure in the first place. (cdc.gov)
  • Health-care providers may want to provide their patients with a system for promptly initiating evaluation, counseling, and follow-up services after a reported sexual, injecting-drug-use, or other nonoccupational HIV exposure that might put a patient at high risk for acquiring infection. (cdc.gov)
  • Sexual exposure also can put a patient at risk for other sexually transmitted diseases (STDs) and pregnancy. (cdc.gov)
  • Injecting-drug-use exposure through shared injection equipment can put a patient at risk for acquiring other viral infections (e.g., hepatitis B and hepatitis C). All persons evaluated for possible nonoccupational HIV exposure should be counseled to initiate, resume, or improve risk-reduction behaviors to avoid future exposure and to prevent possible secondary transmission until their current HIV infection status is determined. (cdc.gov)
  • Lesions of or removal of the vomeronasal organ did not disrupt the preferences of sexually satiated males for a novel female, but elimination of main olfactory system function by ZnSO4 treatment of the olfactory mucosa did abolish such preferences. (nih.gov)
  • Thus olfactory cues are sufficient for individual discrimination of novel females by sexually satiated male hamsters, and such recognition leads to increased sexual arousal. (nih.gov)
  • The first instance could have been chalked up to a sexually inexperienced male targeting the closest thing to a female seal he could find-a case of misdirected mating . (smithsonianmag.com)
  • In addition, sexually active animals were significantly more often wounded and positive for infection. (cdc.gov)
  • We found that sexually attractive females were overwhelmed by male suitors," he said. (sciencedaily.com)
  • Rather than being sexually aroused by a hot gal, male penguins are chemically wired to respond in certain ways to a seemingly compliant female of breeding age. (foxnews.com)
  • Until months or even years go by, a neutered male cat may continue to express himself sexually with a female cat living under the same roof, even though she has been spayed. (tuftscatnip.com)
  • Observed non-procreative sexual activities include non-copulatory mounting (without insertion, or by a female, or by a younger male who does not yet produce semen), oral sex, genital stimulation, anal stimulation, interspecies mating, and acts of affection, although it is doubted that they have done this since the beginning of their existence. (wikipedia.org)
  • Sexual behavior between adults and infants of both sexes is common - about a third of the time it is initiated by the infant and may involve genital rubbing and full copulatory postures (including penetration of an adult female by a male infant). (wikipedia.org)
  • The smell is like a baby powder fragrance making a woman feel fresh and clean. (std-gov.org)
  • We performed another set of experiments where adult male mice were permitted to investigate (touch, smell, etc.) but not mount or attack other female or male mice. (hfg.org)
  • He'll smell a female in heat from several blocks away, and he'll be very eager to get out of the house and go after her. (tuftscatnip.com)
  • Intraspecific male-male aggression, which is important for sexual selection, is regulated by environment, experience and internal states through largely undefined molecular and cellular mechanisms. (nih.gov)
  • To understand the basic neural pathway underlying the modulation of this innate behavior, we established a behavioral assay in Drosophila melanogaster and investigated the relationship between sexual experience and aggression. (nih.gov)
  • Mating and aggression are innate (or instinctive) behaviors that are performed without training. (hfg.org)
  • However, male-female interactions are primarily sexual (mating) and male-male interactions tend to be aggressive, while aggression toward females is more often the exception than the norm. (hfg.org)
  • What brain mechanisms are responsible for separating sexual behavior toward females, and violent aggression toward males, under normal conditions? (hfg.org)
  • However, providing male mice with brief sexual experience was sufficient to generate neuronal ensembles that were specific to males and females, divergent neural representations of conspecific sex and aggression towards males. (hfg.org)
  • The material presented in this book was derived from personal interviews with nearly 6,000 women and from studies in sexual anatomy, physiology, psychology, and endocrinology. (com.qa)
  • In the seemingly tranquil setting of a garden, a bustling ecosystem of animal interactions unfolds, revealing intricate social behaviors that contribute to the balance and dynamics of the natural world. (kenamea.com)
  • George Levick, a surgeon and the medical officer on Scott's famous 1910-1913 expedition to the South Pole , called the Terra Nova expedition, detailed his account of the penguins' seemingly odd behaviors in a four-page pamphlet "Sexual Habits of Adélie Penguins" in 1915. (foxnews.com)
  • For instance, Levick noted the penguins' autoerotic tendencies, and the seemingly aberrant behavior of young unpaired males and females, including necrophilia, sexual coercion, sexual and physical abuse of chicks, non-procreative sex and homosexual behaviors . (foxnews.com)
  • Interestingly, among animals, these two seemingly different behaviors appear to be inextricably intertwined: aggressive encounters are often associated with mating, when males exhibit their dominance for sexual opportunities. (hfg.org)
  • Males appear to devote a lot time searching for mates, while females typically become less active in adulthood and possibly draw males to them using chemical cues. (livescience.com)
  • Pheromones are chemicals that both humans and animals produce. (truepheromones.com)
  • Aphrodisiacs were shown to relax corpus cavernosum smooth muscle tissue in animals, improve erection quality in humans and animals, or increase sexual behavior and satisfaction in humans and animals. (researchgate.net)
  • Information from studies of exposed humans and laboratory animals indicates that absorbed CDDs are distributed preferentially to fatty tissues and to a lesser extent, the liver (ATSDR 1998). (cdc.gov)
  • Being social animals, rats exhibit a range of social behaviors that help them build social bonds and maintain group cohesion. (awionline.org)
  • Many [female rats] were unable to carry pregnancy to full term or to survive delivery of their litters if they did. (wikipedia.org)
  • Answering this fundamental question requires examining the view of a woman's personhood presented by Alfred Kinsey in Sexual Behavior in the Human Female (1953). (legatus.org)
  • Sexual Behavior in the Human Female was originally published in 1953, five years after the male volume. (com.qa)
  • LPS (lipopolysaccharide) administration decreases hormone-induced adult sexual behavior in mice when administered during puberty, but not when it is administered in other developmental periods. (umass.edu)
  • First, the scientists increased the concentration of prolactin in the mice before they were aroused, which they expected would decrease sexual activity. (discovermagazine.com)
  • According to a new study, while brain regions that control sexual and aggressive behaviors in male and female mice are the same, the way they are wired is different. (neurosciencenews.com)
  • To investigate the brain mechanisms, we used a technique called microendoscopy that allowed us to image deep-brain (hypothalamic) neuronal activity in male mice engaged in social behaviors. (hfg.org)
  • The sex-specific ensembles gradually emerged as the mice acquired social and sexual experience. (hfg.org)
  • Hormones and Behavior 56 , 472-480. (upenn.edu)
  • Characterization of ovarian cycles in wild females, however, was not possible, because of a high day-to-day variability in excreted hormones. (uni-wuerzburg.de)
  • The male sex hormones - chiefly testosterone and its derivatives - tend to start being secreted when a cat is four to five months of age, and the animal will begin to show an interest in females two or three months after that. (tuftscatnip.com)
  • These observations reveal an unexpected requirement of experience for behaviors that were traditionally viewed as "hard-wired" or innate. (hfg.org)
  • In "Biological Exuberance," Bagemihl writes: "when new females (usually adolescents) join a troop, they often pair up with an older female with whom they have most of their sexual and affectionate interactions. (wikipedia.org)
  • Predator-prey interactions add an element of both tension and ecological balance to garden animal behavior. (kenamea.com)
  • We have known for some time of these harmful interactions between males and females," he said. (sciencedaily.com)
  • It was immediately clear that characteristic, yet separate, ensembles of neurons were active during interactions with male or female conspecifics. (hfg.org)
  • These observations indicated that interactions with males and females was required for the distinct representations of males and females in the adult mouse brain. (hfg.org)
  • This experiment demonstrated that social interactions are necessary for the formation of male and female specific neuronal ensembles. (hfg.org)
  • Men and women are, by virtue of their anatomy, physiological complements to one another. (str.org)
  • Learned behaviors that have been demonstrated in laboratories have provided good evidence that animals have instinct and a reward system. (wikipedia.org)
  • Here, we demonstrate that two powerful natural reward behaviors, sucrose drinking and sexual behavior, increase levels of ΔFosB in the NAc. (jneurosci.org)
  • Moreover, less clear still is the possible involvement of ΔFosB in more compulsive, even "addictive," models of natural reward behavior. (jneurosci.org)
  • To extend our knowledge of ΔFosB action in natural reward behaviors, we investigated the induction of ΔFosB in the NAc in sucrose drinking and sexual behavior models. (jneurosci.org)
  • In females with breeding-typical plasma levels of estradiol, all of the regions of the mesolimbic reward pathway that respond to music in humans responded to song. (frontiersin.org)
  • They alter the behavior patterns including sexual behavior. (std-gov.org)
  • Gregarious Malagasy lemurs deviate from theoretical expectations derived from sexual selection theory and from patterns found among anthropoids because they live in relatively small groups with an even or male-biased adult sex ratio and lack sexual dimorphism. (uni-wuerzburg.de)
  • The authors show how factors such as age, decade of birth, and religious adherence are reflected in patterns of sexual behavior. (com.qa)
  • The authors make comparisons of female and male sexual activities and investigate the factors which account for the similarities and differences between female and male patterns of behavior. (com.qa)
  • Thus the Coolidge effect is at least partly dependent on discrimination of a new female by chemical cues. (nih.gov)
  • For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes. (artandpopularculture.com)
  • Fungi may also have more complex allelic mating systems, with sexes not accurately described as male, female, or hermaphroditic. (artandpopularculture.com)
  • When God made humanity, He made two sexes: male and female. (str.org)
  • Unlike females, "males have a modified third right arm called a hectocotylus, which has a sperm groove down it and a specialized tip," Mather said. (livescience.com)
  • Scientists at California's Monterey Bay Aquarium Research Institute and the University of Rhode Island recently reported on the same-sex mating habits of Octopoteuthis deletron, a deep-sea squid that indiscriminately shoots sperm packets onto both male and female squids passing by. (popsci.com)
  • Of the 39 squid whose sex could be identified on the videos, nine males and 10 females had sperm sacs attached to their bodies. (popsci.com)
  • The gametes produced by an organism define its sex: males produce small gametes (e.g. spermatozoa, or sperm , in animals) while females produce large gametes ( ova , or egg cells). (artandpopularculture.com)
  • In addition, we show that animals with previous sexual experience, which exhibit increased ΔFosB levels, also show an increase in sucrose consumption. (jneurosci.org)
  • 2. Koalas exhibit same-sex mating behavior. (mentalfloss.com)
  • As research allows for more observations of wildlife, scientists look to understand the meaning behind these complex behaviors. (biggame.org)
  • Even scientists, who strive to note these behaviors objectively, sometimes fall short when detailing the varied sexual behavior in the animal kingdom. (smithsonianmag.com)
  • Genital arousal would thus primarily serve a protective (i.e., avoidance-driven) function and unfold independently from subjective sexual arousal, which is more likely driven by a pleasure (i.e., approach-oriented) motivational focus. (springer.com)
  • It seems that the hypothesis is more strongly directed toward explaining low cue-specificity of genital vasocongestion, rather than explaining the weak correlation between different components of sexual arousal. (springer.com)
  • In the Target Article, several references are made to sexual interest, but subjective sexual arousal needs to be differentiated from sexual desire or interest. (springer.com)
  • Subjective sexual arousal, on the other hand, refers to an integrative process of becoming aware of physical signs of arousal, attentional processes, and cognitive elaboration (Both et al. (springer.com)
  • To answer this question, we need other theoretical models that examine the proximal determinants of genital arousal, its relation to other components of sexual responding, and its practical implications in terms of sexual function and well-being. (springer.com)
  • We hypothesize that females advertize their pregnancy through changes in behavioral, visual and potential auditory signals that males can use to adjust their mating behaviors. (plos.org)
  • Behavioral sink " is a term invented by ethologist John B. Calhoun to describe a collapse in behavior which can result from overcrowding . (wikipedia.org)
  • Social bonds in female baboons: The interaction between personality, kinship, and rank. (upenn.edu)
  • Female chacma baboons form strong, equitable, and enduring social bonds. (upenn.edu)
  • Strong and consistent social bonds enhance the longevity of female baboons. (upenn.edu)
  • The benefits of social capital: Close social bonds among female baboons enhance offspring survival. (upenn.edu)
  • To identify their sex, male A. aculeatus keep a black- and white-stripe pattern on their bodies while in the presence of a female and during aggressive encounters, and females remain camouflaged. (livescience.com)
  • A whopping 50 percent or so of bonobo sexual encounters across all ages are same-sex. (popsci.com)
  • Aggressive encounters in adults and the occupation of exclusive territories by breeding females are characteristic of the breeding season in bank voles ( 14 - 16 ). (cdc.gov)
  • In captivity, sexual encounters among koalas have been known to involve up to five females. (mentalfloss.com)
  • They last twice as long as female-male encounters. (mentalfloss.com)
  • The behavior of laboratory animals demonstrates a mental experience wherein the animal's instincts tell it if it carries out a certain action, it will then receive what it needs. (wikipedia.org)
  • Laboratory animals who were given semaglutide developed tumors, but it is not known if this medication increases the risk of tumors in humans. (medlineplus.gov)
  • Additionally, when a female loses her offspring, she becomes receptive to mating with the new male, who increases his chances to father more cubs. (biggame.org)
  • In the wild, adult rodents are generally more often infected than younger animals. (cdc.gov)
  • It's not just human men who need a bit of downtime between sessions - so do many other animals, from rodents to invertebrates. (discovermagazine.com)
  • Flank gland secretion of females were sufficient for individual discrimination by males, whereas head region scents and vaginal secretions were not sufficient. (nih.gov)
  • however, there is no feedback regulatory loop that controls androgen secretion in women. (medscape.com)
  • It's not surprising then that many people begrudge squirrels as nuisance animals: they gorge themselves on bird feeders with audacity, they build nests in attics, they chew on power lines, and in some cases can even create fire hazards. (mongabay.com)
  • Rather than preferring males over females, or seeking out both equally, the squid simply take a literal shot in the dark in hopes of scoring a viable mate. (popsci.com)
  • Their absence or the absence of androgen receptors results in a female phenotype, despite the presence of a 46 XY karyotype (eg, androgen insensitivity syndrome). (medscape.com)
  • Male birds, like the vibrant peacock, showcase extravagant displays to attract females, a behavior driven by sexual selection. (kenamea.com)
  • The sexual organs would have been brought into activity by the same bidding of the will as controlled the other organs. (wikiquote.org)
  • The male and female sex organs not only fit together, they function together. (str.org)
  • Androgens are also responsible for the development of the secondary sexual organs and ducts, the seminal vesicles, and the prostate. (medscape.com)
  • Studies of the brain have proven that pleasure and displeasure are an important component in the lives of animals. (wikipedia.org)
  • Thus, perhaps after a prolonged sexual association (perhaps weeks, months, even years) brain cells-and male brain cells in particular-might simply become habituated: that is, saturated with neurotransmitters, or refractory to them. (salon.com)
  • The Biological Basis for Behavior - The Biological Basis for Behavior The Human Brain * Reptilian brain AKA the R-complex brain consist of the central core or brainstem. (powershow.com)
  • Females in this study may proximately regulate group composition by synchronizing their fertile periods, which were inferred indirectly from the temporal distribution of births within groups. (uni-wuerzburg.de)
  • 1994). Because of the long-half life of most of the halogenated aromatic hydrocarbons, animals or humans will be exposed for relatively long periods of time following single exposures. (cdc.gov)
  • If you let a male go unneutered, he'll have a lot of testosterone circulating in his body, and he'll continue to be very interested in females. (tuftscatnip.com)
  • 1] In healthy women, 80% of testosterone is bound to sex hormone binding globulin (SHBG), 19% is bound to albumin, and 1% circulates freely in the blood stream. (medscape.com)
  • Although procreation continues to be the primary explanation for sexual behavior in animals, recent observations on animal behavior have given alternative reasons for the engagement in sexual activities by animals. (wikipedia.org)
  • There have also been observations of sex with cub participants, same-sex sexual interaction, as well as sex with dead animals. (wikipedia.org)
  • The analyses of fecal estrogen and progestogen excretion in wild and captive females revealed that monitoring ovarian function is principally possible in redfronted lemurs, as demonstrated by the analysis of samples from captive females. (uni-wuerzburg.de)
  • In addition to this, pubertal females show increased microglial reactivity in hypothalamic areas associated with reproduction, compared to adult females receiving the same treatment. (umass.edu)
  • G1 was composed by three adult males, one sub-adult male, five adult females, two juveniles and two infants. (bvsalud.org)
  • G2 was composed by two adult males and two adult females. (bvsalud.org)
  • The howlers were classified according to Calegaro-Marques and Bicca-Marques (1993) in: adult males (M), adult females (F), sub-adult males (SA), juveniles (J) and infants (I). All members were categorized and recognized according to their individual characteristics, such as, for example, hair coloration, body size and scars, which received specific codes. (bvsalud.org)
  • These can be considered as secret weapons for men to attract or women or to appear far superior to other men. (std-gov.org)