Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| role of gonadotrophin releasing hormones in the reproductive behaviour of female ring doves (streptopelia risoria). | this work was carried out to determine whether gonadotrophin releasing hormone(s) (gnrh) plays a role in the courtship behaviour of female ring doves. in particular, it tests the hypothesis that a high dose of oestrogen suppresses the synergistic action of gnrh with oestrogen which is required to elicit courtship behaviour. the hypothesis was formulated to provide an explanation for a finding in a previous study that ovariectomized ring doves treated with a high dose of oestrogen, paradoxically, ... | 1977 | 406345 |
| oviposition of fertile eggs and postponement of subsequent egg laying in ring doves (streptopelia risoria). | within the 45 days after an oviposition, fewer female doves which had laid fertile eggs laid a subsequent clutch than did females which had laid infertile eggs. during incubation the fertile eggs were replaced by infertile ones; therefore, this difference was not a result of raising squabs. | 1979 | 423162 |
| turtle-dove ovomucoid, a glycoprotein proteinase inhibitor with p1-blood-group antigen activity. | ovomucoid from the egg white of turtle-dove (streptopelia risoria) was purified and shown to be a glycoprotein of mol. wt. 29 400, with valine as n-terminal residue. it is an inhibitor of both trypsin and chymotrypsin, but has a lower affinity for trypsin than has hen ovomucoid. turtle-dove ovomucoid contains antigenic activity cross-reacting with the blood-group-p1 antigen of human erythrocytes. hen ovomucoid has no detectable blood group-p1 activity. the carbohydrate composition of turtle-dove ... | 1979 | 435257 |
| role of vocalizations in the reproductive cycle of ring doves (streptopelia risoria): effects of hypoglossal nerve section on the reproductive behavior and physiology of the female. | 1979 | 552365 | |
| display of courtship and incubation behavior during the reproductive cycle of the male ring dove (streptopelia risoria). | 1977 | 558955 | |
| the effects of photoperiod on androgen-induced reproductive behavior in male ring doves, streptopelia risoria. | the effect of photoperiod on reproductive behavior in male ring doves (streptopelia risoria) was studied in androgen-injected castrates maintained under long (16l:8d) or short (86:16d) photoperiods. behavioral recordings were made over a 2-week period during which each male was paired with a female for 6.5 hr/day. there was some indication that males held on long days display higher levels of courtship activity during the initial period following pairing, but the evidence was not conclusive. day ... | 1978 | 658892 |
| testosterone and "5alpha-dihydrotestosterone" levels in peripheral plasma of male and female ring doves (streptopelia risoria) during and reproductive cycle. | peripheral plasma levels of testosterone (t), 5alpha-dihydrotestosterone (dht), and androstenedione (a) were determined in paired male and female ring doves (streptopelia risoria) throughout the reproductive cycle. before pairing, plasma levels of t and dht in males were 183.4 + or - 28.1 pg/ml and 129.5 + or - 16.3 pg/ml, respectively. 4 hours after pairing with a female, mean levels of t and dht in males had increased by 1.76 and 8 times over basal values, respectively. 3 days after pairing, t ... | 1977 | 861338 |
| induction of nest-material collecting in male barbary doves by intracerebral androgen. | the behaviour of the male barbary dove (streptopelia risoria) in selecting nesting material and transporting it to the nest site is reduced after castration and is restored by treatment with testosterone propionate when castrated males received unilateral intracerebral implants of this androgen. implants in the anterior hypothalamus, preopitc region, and the area of the ventral neostriatum intermediale were effective in reinstating the collection of nesting material, and in many instances restor ... | 1977 | 864657 |
| effect of parental feeding activity on squab-induced crop sac growth in ring doves (streptopelia risoria). | 1977 | 881170 | |
| experiential and hormonal conditions affect squab-egg choice in ring doves (streptopelia risoria). | noncycling, progesterone-injected, experienced male ring doves prefer eggs to squabs in a simultaneous squab-egg choice test, while experienced male doves injected with both progesterone and prolactin prefer squabs to eggs. when exogenous prolactin is administered to either naive or experienced male ring doves during the early phase of a normal incubation cycle, squab choice is significantly increased. squab choice is also significantly increased in incubating doves by 24 hr of exposure to a squ ... | 1976 | 956469 |
| the role of estrogen and progesterone in the regulation of reproductive behaviour in female ring doves(streptopelia risoria) under long vs. short photoperiods. | the role of estrogen and progesterone in the regulation of reproductive behavior was studied in female ring doves (streptopelia risoria) under long vs. short photoperiods. the doves held under long (16 hours/day) or short (8 hours/day) photoperiods were treated for 15 days with saline, estrogen, or progesterone, alone or in combination. 7 days after the start of hormone therapy, the doves were placed with reproductively active males for 4 hours/day for 9 days. no difference was seen in egg-layin ... | 1976 | 974937 |
| effects of septal lesions on the courtship behavior of male ring doves (streptopelia risoria). | 1976 | 1017807 | |
| effects of stimuli emanating from the nest on the reproductive cycle in the ring dove. i: pre-laying behaviour. | the course of several behavioural patterns could be influenced by controlling the state of the nest available to a pair of ring doves (streptopelia risoria). these patterns were: wing-flipping, handling of nesting material, nest bowl occupancy, and nervous activities. in groups having to build nests, the onset of wing-flipping by the female occurred at a predictable time before egg-laying. it is argued that during nest-building a female influences the male to carry material to her by sitting in ... | 1975 | 1106261 |
| induction of incubation behaviour in male ring doves (streptopelia risoria): a behavioural analysis. | male ring doves (streptopelia risoria) were treated with either progesterone or dexamethasone (a powerful acth inhibitor) and tested for incubation behaviour. progesterone treatments shortened the latency of incubation response by facilitating nest-related pre-incubation behaviour patterns in the nest bowl and components of incubation behaviour. the accumulated rather than the daily dose level of progesterone injections appeared to be the determinant factor in mediating behavioural effects. dexa ... | 1975 | 1117443 |
| estrogen-progesterone regulation of nest-building and incubation behavior in ovariectomized ring doves (streptopelia risoria). | the role of ovarian hormones in the induction of nest-building (tucking) and incubation behavior in female doves (streptopelia risoria) was determined by systemic injections of estrogen, or progesterione, or estrogen combined with progesterone, or oil in reproductively experienced ovariectomized females. combined estrogen and progesterone treatment was the most effective hormone regimen for eliciting both behavior patterns in females and also facilitated these behaviors in their untreated mates. ... | 1975 | 1120802 |
| plasma testosterone in courting and incubating male barbary doves (streptopelia risoria). | 1975 | 1151208 | |
| effects of stimuli emanating from the nest on the reproductive cycle in the ring dove. ii: building during the pre-laying period. | the nest is a major focal point of the reproductive cycle in the ring dove (streptopelia risoria). this study shows that the state of the nest is an important determinant of the type of nest-building exhibited. for example, birds faced with an empty nest bowl every day removed more material from dispensers and built more actively than did those allowed to construct nests normally. conversely, those given completed nests were not very active, but were more efficient in using the little they remov ... | 1975 | 1200420 |
| effects of stimuli emanating from the nest on the reproductive cycle in the ring dove. iii: building in the postlaying period and effects on the success of the cycle. | nest-building as a functional activity is shown to continue well into the incubation period of the ring dove (streptopelia risoria), its intensity depending on the state of the nest. the presence of a nest has profound consequences on breeding success: pairs with no nests did not incubate well and did not hatch their eggs. pre-laying disruption of the nest or of the usual roles of the male and female had no effect on incubation as long as a nest was present when the eggs were laid. it is conclud ... | 1975 | 1200421 |
| physiological maturation and reproductive behavior of female doves (streptopelia risoria) held under long and short photoperiods. | 1976 | 1260560 | |
| the transition from sitting on eggs to sitting on young in ring doves, streptopelia risoria: squab-egg preferences during the normal cycle. | ring doves of both sexes sit on young squabs after hatching in much the same manner as they sit on eggs before hatching, but this study demonstrates that the preferred stimulus varies with the state of the animal. a simultaneous squab--egg choice test was given on days 1, 4, 10, and 13 of incubation and on the day following hatching in normal reproductive cycles of experienced and naïve male and female ring doves. naïve doves were more likely than experienced doves to choose eggs throughout the ... | 1976 | 1267229 |
| thyroid and adrenal function in the ring dove (streptopelia risoria) during food deprivation and a breeding cycle. | the concentration of plasma triiodothyronine (t3), thyroxine (t4), corticosterone, and glucose as well as body weight and food intake were measured in pairs of ring doves throughout a breeding cycle and during food deprivation. during courtship and incubation the levels of plasma t4 were significantly higher in males than in females. a transitory decrease in food intake in both sexes was measured at the onset of incubation but was not associated with a change in body weight or in levels of plasm ... | 1992 | 1505723 |
| an outbreak of herpesvirus infection in a flock of ringed turtle doves (streptopelia risoria). | 1991 | 1645600 | |
| iris stromal pigment cells of the ringed turtle dove. | irides from adult ringed turtle doves (streptopelia risoria) were examined using both light and electron microscopy. the anterior surface of the iris stroma contained numerous large venous sinuses overlying bright yellow pigment cells which we classified as "reflecting xanthophores." the pigment cells were filled with irregularly arranged yellow reflecting crystals and occasional pterinosome-like structures. the irides were extracted in naoh and the extracted pigments analyzed using paper chroma ... | 1990 | 2101932 |
| metallothionein production: similar responsiveness of avian liver and kidney to chronic cadmium administration. | the accumulation of hepatic and renal cd, zn, cu, and metallothionein (mt) was investigated in ringed turtle doves (streptopelia risoria) chronically exposed to 3 different concentrations of dietary cd. when only tissue-cd was considered as an inducer of mt, kidney was found to be 35% as responsive as liver in producing mt. however, when all potentially relevant inducing metals (cd + zn + cu) were taken into account, kidney was found to be 85% as responsive as liver. the greater production of mt ... | 2013 | 2315938 |
| a correlation of induced mixed-function oxidase specific activity to c-h bond strengths in partially chlorinated monocyclic hydrocarbons. | the nature of structure-function relationships between the mixed-function oxidase (mfo) system and certain chemically related xenobiotics has been studied. the total hepatic induction index has been modified and used to investigate whether the induction of hepatic mfo is primarily a response to molecular shape (entropic) or to the strength of specific carbon-hydrogen bond strength (enthalpic). using both sprague-dawley male rats and ring doves (streptopelia risoria) and testing with benzene, 1,2 ... | 1986 | 2420856 |
| concentrations of plasma prolactin and luteinizing hormone following nest deprivation and renesting in ring doves (streptopelia risoria). | ring doves with increased plasma prolactin and low plasma lh (group a) or with low plasma prolactin and low plasma lh (group b) which had been incubating sterile eggs for 12 or 18 days, respectively, had their nests and eggs removed for 3 days. upon nest return, observations were made on the birds' readiness to renest and on changes in plasma prolactin and lh. birds from group a demonstrated a far greater tendency to resume incubation than birds from group b. nest deprivation resulted in a sharp ... | 1989 | 2744743 |
| biochemistry and physiology of monoamine oxidase (mao) activity in the ring dove (streptopelia risoria). i. characteristics of mao activity in vitro. | monoamine oxidase (mao) activity was measured in ring dove (streptopelia risoria) tissues using a fluorometric assay with kynuramine as substrate. harmaline inhibited mao activity in a time-dependent manner, and preincubation of enzyme with the drug did not affect its activity. pargyline produced a slow-onsetting inhibition of activity which was enhanced by preincubation of enzyme and inhibitor. harmaline displayed reversible non-competitive inhibition of mao activity. oxygen is also a substrate ... | 1985 | 2866915 |
| biochemistry and physiology of monoamine oxidase (mao) activity in the ring dove (streptopelia risoria). ii. distribution of mao in different tissues. | monoamine oxidase (mao) activity was measured fluorometrically in liver, kidney, intestine and brain of adult male and female ring doves. liver mao was inhibited in a concentration-related fashion by clorgyline and harmaline (mao type a inhibitors) where a plateau in the inhibition curve occurred with about 15% activity remaining, and also by the type b inhibitor deprenyl, which produced a plateau when about 85% activity remained. kidney, intestine and brain mao were inhibited in a biphasic mann ... | 1985 | 2866916 |
| changes in aromatase activity in the brain of the male ring dove (streptopelia risoria) during the breeding cycle. | aromatase activity was measured in striatal and hypothalamic regions of the brain of the male ring dove throughout its breeding cycle. the enzyme activity in the anterior hypothalamus and hyperstriatum was significantly reduced in broody birds. a reduction in plasma lh and the number of spermatogonia per tubule cross-section were also observed at this time. the results support the view that testosterone is involved in the control of aromatase activity in the anterior hypothalamus and hyperstriat ... | 1986 | 2870862 |
| daily variations in monoamine turnover in the brain of the ring dove (streptopelia risoria). | a method for measuring the concentration and turnover of serotonin, dopamine and noradrenaline in small amounts of brain tissue was validated for the ring dove (streptopelia risoria). turnover rates of the catecholamines calculated as the rate of depletion after tyrosine hydroxylase inhibition agreed well with turnover rate measured as rate of accumulation after inhibition of monoamine oxidase at 2.5 h, but not 5 h, after drug administration. using the monoamine oxidase inhibitor, pargyline, tur ... | 1987 | 2886956 |
| histology and ultrastructure of kidney tissue from ringed turtle doves that ingested lead. | ringed turtle doves (streptopelia risoria) ingested 4 x 122 mg lead pellets or lead acetate (75 micrograms pb/g body weight) and their kidneys were examined by histological and electron microscopic techniques. doves that received lead treatments had readily discernable lead intranuclear inclusion bodies in cells of the proximal convoluted tubules. at 33,000 x, the inclusions had a characteristic dense central core, and outer fibrillary zone. necrosis in the proximal tubular area was seen as dete ... | 2013 | 2999374 |
| comparative thyroid function in adult japanese quail and ring doves: influence of dietary iodine availability. | thyroid function was studied in japanese quail, coturnix japonica, and ring doves, streptopelia risoria, when both were fed the same dietary iodine (i; 930 micrograms i/kg). we also compared thyroid function in groups of doves receiving low i (less than 100 micrograms i/kg) or moderate i (930 micrograms i/kg). we measured thyroid gland (tg) weight, tg stable i content, tg 125i uptake, and 125i labeling of thyroid hormones. triiodothyronine (t3) and thyroxine (t4) concentrations in tgs and serum ... | 1987 | 3430122 |
| solitary granular endocrine cells and neuroepithelial bodies in the lungs of the ringed turtle dove (streptopelia risoria). | the presence of granular endocrine cells was investigated in the lungs of 4-6 weeks old ringed turtle doves (streptopelia risoria) by scanning and transmission electron microscopy. no granular cells were observed with the scanning electron microscope. in alternate semithin and ultrathin sections granular cells were found either singly or in small groups in the ciliated parts of the epithelium, and in relatively large clusters of between at least five and sixteen cells in the unciliated flat regi ... | 1986 | 3693079 |
| seasonal changes in concentrations of plasma hormones in the male ring dove (streptopelia risoria). | seasonal changes in concentrations of plasma lh, prolactin, thyroxine (t4), gh and corticosterone were measured in captive male ring doves exposed to natural lighting at latitude 56 degrees n. plasma lh levels decreased steeply in autumn when the daylength fell below about 12.5 h but increased in november as the birds became short-day refractory. in comparison with plasma lh concentrations in a group of short-day refractory birds exposed to 6 h light/day from the winter solstice, plasma lh level ... | 1986 | 3701232 |
| breeding experience modulating androgen dependent courtship behavior in male ring doves (streptopelia risoria). | courtship behavior of reproductively experienced males was compared with that of age-matched inexperienced males before and after castration and during treatments with hormones (testosterone propionate and estradiol benzoate). inexperienced males displayed significantly lower levels of nest-oriented courtship, the nest-cooing (nest-soliciting) and wingflippings; however, agonistic courtship, the bow-cooing, was not affected by breeding experience. the lower level of nest-cooing display in the in ... | 1986 | 3714833 |
| further search for interaction antigens on erythrocytes in selected species hybrids of birds. | replicated blood typing reagents were made to detect an interaction antigen (hybrid substance) on the red cells of several species hybrids of birds. reagents against pigeon x ringneck dove hybrids are compared with other reagents made in an effort to find a similar interaction in the chicken x guinea fowl hybrid and in the ringneck x mourning dove hybrid. mallard x muscovy hybrids also were tested for their reported red cell interaction product. both rabbits and parental types were injected with ... | 1986 | 3737514 |
| female cooing promotes ovarian development in ring doves. | in female ring doves (streptopelia risoria), hearing their own coos promoted greater follicular growth than hearing males coo, as demonstrated by the playback of various coos to experimentally muted females, under normal conditions. this difference in follicular growth suggests that the females' own cooing, not the males' cooing, stimulates the ovarian response. | 1986 | 3737748 |
| factors affecting prolactin secretion during the breeding cycle of the ring dove (streptopelia risoria) and its possible role in incubation. | plasma prolactin began to increase significantly about 5 days after the onset of incubation in both sexes of the dove to reach a peak at the time of hatch. at this time, the concentration of prolactin in the plasma of the female was significantly higher than in the male. in the middle of the incubation period prolactin levels measured over a 24-h period remained constant in both sexes, although the male sits during the middle of the day and the female for the rest of the time. nest deprivation r ... | 1986 | 3760743 |
| external factors affecting the duration of broody behavior in the ring dove (streptopelia risoria). | the object of this study was to investigate factors which determine the duration of sitting in ring doves. this normally lasts ca. 19 days from laying, with very small variation. the period is made up of 15 days incubating eggs and 4-5 days brooding squabs. the duration of sitting is unaffected by substituting fresh or sterile eggs, and can only be slightly influenced by substituting foster squabs or new eggs just before or after hatching. the sitting period appears to be predetermined to run fo ... | 1986 | 3770649 |
| ascending vocalization pathways in the female ring dove: projections of the nucleus intercollicularis. | nest-coo (courtship) vocalization is an estrogen-dependent component of a sequence of behaviors leading to egg-laying in the ring dove (streptopelia risoria). implantation of estrogen in the nucleus intercollicularis of ovariectomized females restores the ability to produce nest-coos. lesion of n. intercollicularis specifically disrupts nest-cooing and inhibits follicular development. we used anterograde transport of tritiated leucine to identify regions that receive input from n. intercollicula ... | 1987 | 3792481 |
| characteristics of prolactin binding sites in the brain of the ring dove (streptopelia risoria). | radiolabeled ovine prolactin ([125i]oprl) was found to bind specifically to crude membrane fractions prepared from ring dove brain homogenates. specific binding changed with incubation time and temperature but did not fluctuate systematically with ph. specific binding levels were highest in hypothalamus and forebrain and were lowest in cerebellum and brain stem. a linear increase in specific binding was observed in pooled midbrain and forebrain membrane fractions as membrane protein concentratio ... | 1987 | 3817448 |
| vasoactive intestinal polypeptide stimulates prolactin release in vivo in the ring dove (streptopelia risoria). | i.v. administration of vasoactive intestinal polypeptide (vip) to ring doves significantly elevated the plasma concentration of prolactin after 10 min in a dose-related manner. the plasma prolactin concentration of nonbreeding doves with low basal levels was increased by a similar amount as in brooding doves whose initially high concentration of plasma prolactin had been reduced by nest deprivation prior to treatment. | 1986 | 3956694 |
| thyroid development in altricial ring doves, streptopelia risoria. | the development of thyroid function in altricial ring doves was assessed by measuring thyroid hormone concentrations in the serum, hormone content of the thyroid glands and hepatic 5'-monodeiodinase activity. thyroid function is low at hatching and increases during the first eight days while the nestlings are ectothermic and completely dependent on parental care. the rate of increase of serum hormone concentrations slows after day 8; hormone concentrations are stable by day 15 and for the remain ... | 1985 | 3996891 |
| contribution of nesting experience to progesterone-induced incubation in ring doves (streptopelia risoria). | injections of progesterone induce incubation behavior in gonadally intact ring doves only if the doves have had previous experience with at least the nest-building phase of a breeding cycle. the present study was designed to determine whether exposure to progesterone during the nest-building phase is sufficient to account for the ability of progesterone to induce incubation at a later time or whether some other factor provided by experience with this phase of the cycle is needed. six groups of 1 ... | 1985 | 4042614 |
| falcon herpesvirus, the etiologic agent of inclusion body disease of falcons. | a viral agent has been isolated from five fatal cases of naturally occurring inclusion body disease in three different falcon species, namely, the prairie falcon (falco mexicanus), the red-headed falcon (f. chiquera), and the peregrine falcon (f. peregrinus). the virus has been shown to possess the physical, chemical, and biological properties of a herpesvirus and has been used to reproduce inclusion body disease in the prairie falcon, merlin (f. columbarius), and american kestrel (f. sparverius ... | 1973 | 4352453 |
| role of adrenal hormones in incubation behavior of male ring doves (streptopelia risoria). | 1973 | 4355592 | |
| the induction of nest building in the ring dove (streptopelia risoria): hormonal and social factors. | 1974 | 4421289 | |
| effect of photoperiod on the decline in behavioural responsiveness to intra-hypothalamic androgen in doves (streptopelia risoria). | 1974 | 4452823 | |
| effects of mate familiarity on the courtship and reproductive success of the ring dove (streptopelia risoria). | 1972 | 4674672 | |
| inhibition of crop sac growth by dexamethasone in ring doves (streptopelia risoria). | 1973 | 4695436 | |
| effect of ovariectomy on the reproductive behavior of female ring doves (streptopelia risoria). | 1973 | 4735924 | |
| effect of estrogen on behavior of ovariectomized ring doves (streptopelia risoria). | 1973 | 4735925 | |
| role of gonadal hormones in incubation behavior of male ring doves (streptopelia risoria). | 1973 | 4745814 | |
| a further analysis of the responsiveness of experienced and inexperienced ring dove (streptopelia risoria) foster parents to squabs. | 1973 | 4770282 | |
| some social and hormonal determinants of nest-building behaviour in the ring dove (streptopelia risoria). | 1973 | 4781222 | |
| radioimmunoassay of plasma estradiol during the breeding cycle of ring doves (streptopelia risoria). | 1974 | 4818772 | |
| radioimmunoassay of plasma progesterone during the reproductive cycle of male and female ring doves (streptopelia risoria). | 1974 | 4831120 | |
| changes in hypothalamic responsiveness to testosterone in male barbary doves (streptopelia risoria). | 2016 | 4887719 | |
| effects of hypothalamic implants of gonadal steroids on courtship behaviour in barbary doves (streptopelia risoria). | 1971 | 4931797 | |
| cellular esterases of the ringneck dove. | 2006 | 5094717 | |
| squab-induced crop growth in expereinced and inexperienced ring dove (streptopelia risoria) foster parents. | 1971 | 5118245 | |
| vocalizations and breeding behaviour of surgically deafened ring doves (streptopelia risoria). | 1971 | 5150477 | |
| behavioural thermoregulation in the barbary dove (streptopelia risoria). | 1971 | 5156616 | |
| auditory stimulation of ovarian activity in the ring dove (streptopelia risoria). | 1969 | 5392639 | |
| differential effects of testosterone and oestradiol on male courtship in barbary doves (streptopelia risoria). | 1970 | 5484040 | |
| the thermoregulatory role of feather movements in the barbary dove (streptopelia risoria). | 1970 | 5522492 | |
| initiation of courtship by hypothalamic implants of testosterone propionate in castrated doves (streptopelia risoria). | 1967 | 5583507 | |
| role of testosterone in progesterone-induced incubation behaviour in male ring doves (streptopelia risoria). | 1969 | 5771721 | |
| an embryo specific red cell antigen in a dove species, streptopelia risoria. | 2014 | 5851809 | |
| the effect of exogenous hormones on aggressive and defensive behaviour in the ring dove (streptopelia risoria). | 1966 | 5950814 | |
| selective inhibition by progesterone of androgen-induced behavior in male ring doves (streptopelia risoria). | 1967 | 6027415 | |
| properties of hepatic binding sites for prolactin in ring doves (streptopelia risoria). | specific binding of 125i-labeled ovine prolactin (125i-oprl) was detected in crude membrane fractions prepared from ring dove (streptopelia risoria) liver homogenates. in characterization studies, specific binding was found to depend upon ph, incubation time, incubation temperature, and membrane protein concentration. competitive inhibition of specifically bound 125i-oprl was observed with human growth hormone, human and rat prolactin, and dove pituitary extract but not with turkey prolactin, hu ... | 1984 | 6088358 |
| histological effects and lead concentrations in tissues of adult male ringed turtle doves that ingested lead shot. | adult male ringed turtle doves (streptopelia risoria) were administered 0 or 4-110 mg lead shot and/or were exposed to cold temperatures (6 +/- 1 degrees c). five of the seven doves that ingested shot and were exposed to cold died. doves that ingested shot and were not exposed to cld (21 +/- 1 degrees c) had no mortality after 9 d, but several birds had seizures. tissues were examined microscopically for lesion. doves ingesting shot consistently had pb intranuclear inclusion bodies in cells of t ... | 1981 | 6279880 |
| androgens and reproductive behavior in ovariectomized ring doves. | eighteen ovariectomized ring doves (streptopelia risoria) received subcutaneous silastic implants of either testosterone propionate (tp), 5 alpha-dihydrotestosterone propionate (dhtp) or cholesterol. birds were paired daily for 1-hr with intact males. eleven days after implantation the pairs were observed. both tp and dhtp activated wingflipping behavior in the females. none of the females showed receptive crouching. aromatization of testosterone to estrogen does not appear to be involved in win ... | 1984 | 6484020 |
| toxicity of anticholinesterase insecticides to birds: technical grade versus granular formulations. | the acute toxicities of 13 granular anticholinesterase insecticides were compared with their technical grade active ingredients by administering single oral doses of chemical to adult northern bobwhites (colinus virginianus) and evaluating resultant ld50 values and dose-response curves. similar tests with ringed turtledoves (streptopelia risoria) were conducted with five of the granular formulations to check for interspecific differences. the test chemicals were amaze 15g (isofenphos), counter 1 ... | 1984 | 6510327 |
| the toxicology of lead shot ingestion in ringed turtle doves under conditions of cold exposure. | ringed turtle doves (streptopelia risoria) were dosed with 0 (n = 3) or 4 x 110 mg lead shot (n = 7) and were held at temperatures of 6 degrees c (+/- 1) for 7 days beginning 48 hr after lead shot dosing. doves given 0 (n = 3) or 4 x 110 mg lead shot (n = 7) were maintained at 21 degrees +/- 1 degree c for a 9-day experimental period. bone, liver and brain lead concentrations were higher in birds that ingested lead shot. doves that ingested lead shot and were exposed to 6 degrees c temperatures ... | 1984 | 6520724 |
| timing of incubation bouts by ring doves (streptopelia risoria). | ring dove parents share in incubation and brooding such that the male sits for a block of time toward the middle of the day and the female sits the rest of the time. in order to evaluate the role of the sexes in determining nest exchange, approaches to the nest, the timing of incubation behavior, and the topography of interactions at the nest site were continuously monitored. most nest exchanges (87%) were initiated by the nonsitting mate. there was less variability associated with the onset of ... | 1983 | 6684527 |
| hormonal control of the gonadal regression and recovery observed in short days in male and female doves. | sexually mature ring doves (streptopelia risoria) maintained from hatch on a photoperiod of 14 h light : 10 h darkness (14l : 10d) and kept in isolation were transferred to 8l : 16d. this treatment resulted in a partial regression of the ovaries and testes and a fall in the concentration of plasma lh but not of plasma fsh. after 2--3 months exposure to 8l : 16d, the gonads regrew to their original size: this regrowth was accompanied by a parallel increase in the concentration of plasma lh. the r ... | 1981 | 6783721 |
| the role of nest-building activity of gonadotrophin secretions and the reproductive success of ring doves (streptopelia risoria). | this study was undertaken to investigate the intricate relations between prelaying nest-building activity and preovulatory hormonal changes, and the effects of these events on breeding success. pairs of ring doves were allowed to go through a complete breeding cycle under four conditions of nest-building opportunity. nest were self-made, pre-made, pre-made and covered, or removed daily to generate various levels of building activity. behavioral and hormonal changes were observed throughout the c ... | 1982 | 6802886 |
| serum prolactin levels and crop-sac development in ring doves during a breeding cycle. | using a turkey prolactin radioimmunoassay, the serum prolactin levels of male and female ring doves (streptopelia risoria) during the breeding cycle were measured and their circulating prolactin levels were compared to crop-sac weight on a within-bird basis. during the early phase of the incubation period, crop weight showed a delayed response to prolactin stimulation and there was no correlation; during the midincubation period when prolactin and crop-sac weight were increasing, there was a str ... | 1983 | 6862393 |
| the effect of lead shot ingestion on the testes of adult ringed turtle doves (streptopelia risoria). | gross and microscopic testicular changes were seen in 11 out of 14 adult ringed turtle doves (streptopelia risoria) given 4 x 110 mg lead shot orally and housed at either 21 +/- 1 c (lead-treated, lt) or 6 +/- 1 c (lead-treated, cold-exposed; ltce). the testes of the lt and ltce doves were yellower than the ivory-colored testes of the control doves. the testicular weight of the lt and ltce doves was 0.557 +/- 0.117 g, (mean +/- standard error), whereas the testicular weight of the control doves ... | 2013 | 6870723 |
| effects of testosterone metabolites and estrogen in the midbrain control of courtship behavior in the male ring dove (streptopelia risoria). | relative effectiveness of testosterone (t) and its metabolites in the midbrain to induce courtship behavior was investigated in male ring doves. t, 5 alpha-dihydrotestosterone (5 alpha-dht), 5 beta-dihydrotestosterone, estradiol-17 beta (e), or cholesterol was implanted in or around the nucleus intercollicularis region (ico) of the castrated male. resulting courtship behavior was observed by pairing the treated males with stimulus females. t, 5 alpha-dht and e activated nest-cooling behavior pat ... | 1982 | 7057962 |
| transient aphagia produced following bilateral destruction of the lateral hypothalamic area and quinto-frontal tract of chicks. | six groups of broiler chicks, gallus domesticus, sustained bilateral lesions to specific neural structures residing in the lateral hypothalamic and thalamic areas. in contrast to past data reported for the albino rat, the pigeon, columba livia and barbary dove, streptopelia risoria, bilateral destruction of the chick lateral hypothalamic area (lhy), quinto-frontal tract (qf), and stratum cellulare externum (sce) resulted in transient aphagia and rapid recovery of lost body weight. similarly, bil ... | 1982 | 7079336 |
| trichomonas gallinae infections in the ringdove (streptopelia risoria). | twenty trichomonas-free ringdoves (streptopelia risoria) were intubated with trichomonas gallinae derived from pigeons (columba livia). by 15 days post-intubation (dpi) five doves had t. gallinae-type lesions (cankers) in the pregastric portion of the digestive system, and six doves had t. gallinae present without lesions. sixteen trichomonas-free ring doves were infected using t. gallinae from axenic cultures. by 21 dpi four doves had t. gallinae lesions and died, and one dove had t. gallinae p ... | 1982 | 7097875 |
| hormones modulate the concentration of cytoplasmic progestin receptors in the brain of male ring doves (streptopelia risoria). | a cytoplasmic progestin receptor has been characterized in the brain of castrated ring doves using an in-vitro assay that measures the binding of a synthetic progestin, [3h]17 alpha,21-dimethyl-19-nor-pregna-4,9-diene-3,20-dione(promegestone; r5020). the affinity of the receptor was similar in both the hyperstriatum and the hypothalamus (kd approximately equal to 4 x 10(-10) mol/l). its concentration was higher in the anterior hypothalamus-preoptic area (63 +/- 4 fmol/mg (s.e.m.) protein) than i ... | 1980 | 7191878 |
| brain 5beta-reductase: a correlate of behavioral sensitivity to androgen. | testosterone is converted in the dove (streptopelia risoria) brain to 5 beta-reduced metabolites that do not affect behavior. in long-term castrated birds, which are relatively insensitive to the behavioral effects of testosterone, the activity of preoptic 5 beta-reductase is increased. the increase, which is specific to the preoptic area, is reversed by estrogen. inactivation of testosterone by 5 beta-reduction may be involved in the control of brain sensitivity to androgen. | 1981 | 7244635 |
| social interactions and androgen levels in birds. i. female characteristics associated with increased plasma androgen levels in the male ring dove (streptopelia risoria). | 1981 | 7262531 | |
| social interactions and androgen levels in birds. ii. social factors associated with a decline in plasma androgen levels in male ring doves (streptopelia risoria). | 1981 | 7262532 | |
| hormones and midbrain mediation of courtship behavior in the male ring dove (streptopelia risoria). | the nucleus intercollicularis (ico) region of the midbrain has been shown to concentrate testosterone and to be involved in the neural control of avian vocal behavior. the present study investigated the possible role of the ico region in the androgen-dependent courtship behavior of male ring doves, with the use of radio-frequency lesion and intracranial hormone-implant techniques. in the first experiment, bilateral lesions in the ico region reduced nest-cooing but did not specifically alter othe ... | 1981 | 7276276 |
| possible effect of a sex chromosome on reproductive performance in columbidae. | in comparison with the reproductive performance of matings within streptopelia risoria, the species hybrid males, from matings to s. risoria of males of s. chinensis or s. senegalensis, displayed increased infertility, but not an increase of embryo mortality. previous findings of a high percentage of sperm abnormalities provide a basis that explains in part the infertility of the species hybrid males. the infertility and embryo mortality of both kinds of species hybrid females, the heterogametic ... | 2003 | 7276528 |
| concentrations of prolactin and luteinizing hormone in plasma of doves in relation to incubation and development of the crop gland. | the concentrations of prolactin and lh were measured in the plasma of male and female ring doves (streptopelia risoria) during the breeding cycle. prolactin concentrations were low during courtship and early incubation but increased markedly (p less than 0.01 in both sexes) between days 7 and 15 of incubation, during the period of rapid growth of the crop sac. levels remained raised for 4 days after the young had hatched but then declined as the crop sacs gradually regressed. these observations ... | 1981 | 7276801 |
| circulating concentrations of growth hormone during growth, maturation, and reproductive cycles in ring doves (streptopelia risoria). | 1981 | 7297847 | |
| short day induced gonadal regression in ring doves (streptopelia risoria): a case for seasonal variation. | changes in follicular size (in diameter) were studied by laparotomy under various photoperiodic regimes in the domesticated ring doves that have been kept under standard laboratory conditions for generations. follicular response shows two distinct patterns: 1. a shift from standard laboratory photoperiodic regime (ld 14:10) to extra long day (ld 20:4) accelerated the follicular development in the spring as well as in the autumn; 2. a shift from the standard laboratory photoperiodic regime (ld 14 ... | 2007 | 7449575 |
| the role of the midbrain in courtship behavior of the female ring dove (streptopelia risoria): evidence from radiofrequency lesion and hormone implant studies. | the involvement of the nucleus intercollicularis (ico) region of the midbrain, an estrogen-sensitive area, in the expression of estrogen-dependent female courtship behavior was examined with radiofrequency lesion and intracranial hormone implant techniques. bilateral lesions in the ico region caused a reduction in the female's nest coos, and no reduction in other behaviors in response to male courtship. in addition, the follicles of the ico lesioned females failed to grow in response to male cou ... | 1981 | 7470910 |
| inhibitory effects of anti-prolactin receptor antibodies on prolactin binding in brain and prolactin-induced feeding behavior in ring doves. | although binding sites for prolactin (prl) have been mapped and partially characterized in the brains of several species, there is as yet no direct evidence that the effects of intracranial prl on brain function are receptor-mediated events. we addressed this question by testing whether antibodies generated against rat liver prl receptors can effectively antagonize the ability of prl to enhance feeding behavior in male ring doves (streptopelia risoria). both agents were administered directly to ... | 1995 | 7753332 |
| systematic changes in gaping during the ontogeny of pecking in ring doves (streptopelia risoria). | food pecking in the ring dove is a skilled prehensile response that is similar to, but simpler than, many other prehensile responses. previous work has shown that this response is initially poorly executed and requires experience for its accurate direction and coordination. the response involves two components: the thrusting of the bird's head toward food, and the opening and closure of the beak around food. here, this second component, called gape, is followed through development with a precise ... | 1995 | 7796975 |
| effect of pinealectomy upon the nonspecific immune response of the ring-dove (streptopelia risoria). | the different stages of the phagocytic process by granulocytes of pinealectomized or sham-pinealectomized ring doves (streptopelia risoria) as well as hematological parameters (total white blood cells, smear, and total protein) and serum hormone levels (triiodothyronine (t3), thyroxine (t4), and corticosterone) were studied. a number of immunological parameters of the phagocytosis process, including adherence capacity, mobility rate, the phagocytosis capacity for inert particles and the digestio ... | 1994 | 7932039 |
| brood size affects behavior, interclutch interval, lh levels, and weight in ring dove (streptopelia risoria) breeding pairs. | this study examines the effects of experimental manipulation of brood size (one or two squabs) on the behavior, interclutch interval, plasma lh concentrations, and weights of ring dove parents. twelve dove pairs were observed, sampled, and weighed over a cycle with one and a cycle with two squabs. before hatch, no parameter showed any difference between pairs which would subsequently have one or have two squabs. after hatch, males and females having one squab fed less, while males showed more pe ... | 1993 | 8294121 |
| auditory-responsive units in the midbrain vocal nuclei in the ring dove (streptopelia risoria). | the avian midbrain vocal control nucleus, n. intercollicularis (ico), receives inputs from midbrain auditory nucleus and from a subdivision of auditory thalamus, suggesting a possibility of auditory response units in the ico. using single-unit recordings, we explored auditory response units throughout the dorsomedial midbrain of female ring doves under deep general anesthesia (acute preparation). we found exclusively in the ico, units that responded preferentially to taped courtship coos of cons ... | 1993 | 8457918 |
| relationships of trichomonas gallinae to the palatal-esophageal junction of ring doves (streptopelia risoria) as revealed by scanning electron microscopy. | ring doves (streptopelia risoria) were experimentally infected with pathogenic (virulent) trichomonas gallinae so that trichomonad activities in the upper alimentary tract, prior to canker formation, could be examined with scanning electron microscopy. between 6 and 15 hr postinoculation low numbers of ameboid t. gallinae were attached to apical microfolds and cell borders of the palatal-esophageal junction squamous epithelium. initial parasite activities at tightly attached cell borders and api ... | 1993 | 8501599 |