Showing papers in "Hormones and Behavior in 1984"

TL;DR: The hypothesis that elevated levels of corticosterone associated with exposure to stressful stimuli inhibit sexual behaviors in rough-skinned newts is supported.

TL;DR: Comparison of a wide array of vertebrates reveals numerous exceptions to the postulate of hormone-dependence of mating behavior, and consideration of these species indicates that there is no fixed or intrinsic causal association among gamete production, sex hormone secretion, and mating behavior within any of the classes of vertebrate.

TL;DR: A role for oxytocin, acting with estrogen, in the onset of maternal behavior in rats is suggested, and a slight, transient hyperthermic effect of oxytoc in on body temperature was observed in this test paradigm.

TL;DR: To examine the influence of gonadal androgen, known to influence the aggression that attends hierarchy formation, lizard pairs were constituted in which one or both members were castrated.

TL;DR: It was concluded that causal mechanisms controlling courtship behavior in the red-sided garter snake are fundamentally different, at least at the physiological level, from those mechanisms described for many laboratory and domesticated species.

TL;DR: A pattern of increased midcycle sexual activity independent of interactions with males, type of contraceptive method, or fear of pregnancy is demonstrated.

TL;DR: The strong correlation between preovulatory female behavior and estradiol level suggests that the female's behavior provides precise information about her reproductive state and could thus coordinate copulation with maximal fertility.

TL;DR: In this paper, the authors show that after being housed with males, female rats exhibit frequent and intense aggressive behavior toward unfamiliar rats, while the male residents attack males and not females.

TL;DR: Three experiments were performed to analyze the time course of demasculinization in the Japanese quail and to test the activating and organizing effects of estradiol (E2) in adult sexually active birds.

TL;DR: The results support the conclusion that in castrated male rats estradiol treatment is sufficient for the activation of masculine copulatory behavior, and that the penile actions necessary for intromission are not dependent on androgen.

TL;DR: There is little conclusive evidence regarding the details of the molecular mechanisms by which estradiol and progesterone facilitate estrous behavior, but the mechanisms underlying steroid induction of female rodent sexual behavior have been extensively investigated.

TL;DR: Data collected by observation, trapping, and telemetry during three field seasons contradict predictions of the hypothesis that concurrent, high levels of circulating gonadal steroids cause natal dispersal and suggest that perinatal exposure to androgen subsequently results in dispersal of treated individuals.

TL;DR: Statistical analysis revealed that the presence of one or more males caudal to a female in the uterine horn has a more critical influence on that female's morphology than contiguity per se.

TL;DR: It is concluded that E2 can demasculinize sexual behavior only in females and only if treatment is performed in very young birds.

TL;DR: The VMH-lesioned females did not differ from the sham-operated females in the ability to display lordosis during the coital contacts or the frequency and duration of visits to the inactive males or ovariectomized females, but theSham- operated females did have some transitory alterations in copulatory behavior in comparison to unoperated control females.

TL;DR: An increase in sensitivity to the effects of testosterone on behavior thus occurs during aging in 0M females, which are relatively insensitive to testosterone in young adulthood.

TL;DR: Although P augments aggression in female mice it apparently is not a sufficient stimulus for producing pregnancy-like aggressive behavior.

TL;DR: In this paper, the authors measured the levels of LH, DHT, testosterone, and corticosterone for all members in free-living winter flocks of willow tits, Parus montanus.

TL;DR: The similarity of the effects on male offspring copulation of crowding their mothers during pregnancy or ACTH treatment during pregnancy suggest mediation by similar mechanisms, implicating involvement of maternal pituitary-adrenocortical secretions during pregnancy in the production of these behavioral deficits.

TL;DR: The influence of social interactions on plasma cortisol was studied in captive Microcebus murinus, a prosimian primate, and a persistent adrenocortical activation was found and represents a 75 to 120% increase compared to paired animals.

TL;DR: A role for PG is supported in oviposition behavior of Cichlasoma bimaculatum, in which female reproductive behaviors involve both preovulatory courtship and substrate cleaning behaviors, and post-ovulatory ovipposition behavior.

TL;DR: Results were obtained, indicating that the reduced gain in hypothyroid rats was not due to impaired suckling capability, or insufficient sensory stimulation for milk secretion but to a decreased milk production of PTU mothers.

TL;DR: Marked prolactin (PRL) secretion in response to the ultrasonic distress vocalizations of rat pups in lactating dams deprived of their pups for 6 hr was reported by others but this phenomenon could not be confirmed under testing conditions at either 1 or 2 weeks postpartum.

TL;DR: The hypothesis that exposure of the VMN to E2 is necessary for the priming of estrous behavior in the female rat is supported.

TL;DR: The data support the notion that the effects of testosterone are controlled by enzymatic shifts which could modulate the sensitivity to the hormone at the cellular level.

TL;DR: This study investigated whether estrous females would exhibit preferential responding to randomly chosen, socially naive males before dominance testing occurred and found that they did indeed exhibit such preferences.

TL;DR: Old and middle-aged rhesus males (Macaca mulatta) that were housed in the same type of home cage and the same room for several years were moved to a new location in an adjacent building and showed significantly higher levels of sexual activity than did old males.

TL;DR: At levels below the physiological range, small changes in plasma testosterone were associated with marked changes in behavior and the female partner exerted a pronounced effect upon the responses of males to TP treatment.

TL;DR: Estrous females appeared to be unable to distinguish between dominant and subordinate males, and subjects were found to exhibit sniffing preferences for male odors and possible an avoidance of female odors relative to the saline control.

TL;DR: Estradiol followed by progesterone injection to ovariectomised rats results in an increase in marking rates, which suggests an endocrine base to the changes in scent-marking behavior that are known to occur with the rat estrous cycle.