Publications

the ovarian cycle of the ring dove streptopelia risoria.		1945	21003393
seminoma of the testis in a collared turtle dove (streptopelia risoria).		1948	18876554
the hybrid-substance of the erythrocytes of the hybrids between columba livia and streptopelia risoria.		1956	17247657
[immunological relations between streptopelia turtur, streptopelia risoria and streptopelia decaocto].		1957	13499709
oviduct response to estrogen and progesterone in the ring dove (streptopelia risoria).		1957	13441743
effect of female sex hormones on incubation behavior in the ring dove (streptopelia risoria).		1958	13525475
the presence of the mate and of nesting material as stimuli for the development of incubation behavior and for gonadotropin secretion in the ring dove (streptopelia risoria).		1961	13760503
gonadotropin secretion in response to external stimuli of varying duration in the ring dove (streptopelia risoria).		1961	13760504
[cadmium-induced damage of the gonads of both male and female ring doves. (streptopelia risoria)].		1964	14277863
imprinting in an altricial bird: the blond ring dove (streptopelia risoria).	newborn ring doves were taken away from their parents when they were from 4 to 14 days old. they were then either raised by hand in complete visual isolation from other members of their species or placed in a community cage after weaning. they were tested as adults in a free-choice situation between human beings and ring doves. an optimum period for imprinting was found when they were about 7 to 9 days old. the controls showed that subsequent experiences during the life span of a bird also have ...	1964	14185323
a recessive lectin-factor in streptopelia risoria.		1965	14292152
the effect of exogenous hormones on aggressive and defensive behaviour in the ring dove (streptopelia risoria).		1966	5950814
initiation of courtship by hypothalamic implants of testosterone propionate in castrated doves (streptopelia risoria).		1967	5583507
selective inhibition by progesterone of androgen-induced behavior in male ring doves (streptopelia risoria).		1967	6027415
role of testosterone in progesterone-induced incubation behaviour in male ring doves (streptopelia risoria).		1969	5771721
auditory stimulation of ovarian activity in the ring dove (streptopelia risoria).		1969	5392639
the thermoregulatory role of feather movements in the barbary dove (streptopelia risoria).		1970	5522492
differential effects of testosterone and oestradiol on male courtship in barbary doves (streptopelia risoria).		1970	5484040
squab-induced crop growth in expereinced and inexperienced ring dove (streptopelia risoria) foster parents.		1971	5118245
behavioural thermoregulation in the barbary dove (streptopelia risoria).		1971	5156616
vocalizations and breeding behaviour of surgically deafened ring doves (streptopelia risoria).		1971	5150477
effects of hypothalamic implants of gonadal steroids on courtship behaviour in barbary doves (streptopelia risoria).		1971	4931797
effects of mate familiarity on the courtship and reproductive success of the ring dove (streptopelia risoria).		1972	4674672
a further analysis of the responsiveness of experienced and inexperienced ring dove (streptopelia risoria) foster parents to squabs.		1973	4770282
role of gonadal hormones in incubation behavior of male ring doves (streptopelia risoria).		1973	4745814
role of adrenal hormones in incubation behavior of male ring doves (streptopelia risoria).		1973	4355592
effect of estrogen on behavior of ovariectomized ring doves (streptopelia risoria).		1973	4735925
effect of ovariectomy on the reproductive behavior of female ring doves (streptopelia risoria).		1973	4735924
inhibition of crop sac growth by dexamethasone in ring doves (streptopelia risoria).		1973	4695436
some social and hormonal determinants of nest-building behaviour in the ring dove (streptopelia risoria).		1973	4781222
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
radioimmunoassay of plasma progesterone during the reproductive cycle of male and female ring doves (streptopelia risoria).		1974	4831120
radioimmunoassay of plasma estradiol during the breeding cycle of ring doves (streptopelia risoria).		1974	4818772
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 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
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. 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
plasma testosterone in courting and incubating male barbary doves (streptopelia risoria).		1975	1151208
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
effects of septal lesions on the courtship behavior of male ring doves (streptopelia risoria).		1976	1017807
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
changes in emotionality following section of the tractus occipito-mesencephalicus in the barbary dove (streptopelia risoria).	section of the efferent pathways from the archistriatum in the barbary dove, leads to an immediate and persisting change in emotionality. the birds no longer react fearfully to the presence of a model predator, whereas control groups in which either the tractus occipito-mesencephalicus remains intact, or when the midline connections of the anterior commissure only are sectioned, continue to behave normally. this lack of responsiveness remains even under conditions of changing endogenous levels o ...	1976	24923543
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
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
effect of parental feeding activity on squab-induced crop sac growth in ring doves (streptopelia risoria).		1977	881170
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
display of courtship and incubation behavior during the reproductive cycle of the male ring dove (streptopelia risoria).		1977	558955
attempts at infecting ringed turtle doves with virulent trichomonas gallinae.	twenty trichomonas -free ringed turtle doves ( streptopelia risoria ) were inoculated per os with the highly virulent jones' barn strain of trichomonas gallinae . none became infected. three f1 females housed together were similarly inoculated with this strain and remained trichomonas -positive for upwards of 182 days. they showed no disease and eventually lost their infections. these three positive females "mated" and laid several six-egg sets in a communal nest. at successive nestings they wer ...	1977	24228964
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
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
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
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
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
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 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
circulating concentrations of growth hormone during growth, maturation, and reproductive cycles in ring doves (streptopelia risoria).		1981	7297847
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
an outbreak of herpesvirus infection in a flock of ringed turtle doves (streptopelia risoria).		1991	1645600
effet de la familiarisation avec l'environnement sur le comportement de vigilance de la tourterelle rieuse streptopelia risoria.	an experiment on food-deprived barbary doves streptopelia risoria shows that in a novel environment the subjects give priority to vigilant behaviour over foraging. the trade-off between vigilance and foraging is reversed when the subjects have been familiarized with their environment. vigilance bouts are long and foraging bouts short in a novel environment, whereas the reverse is true in a familiar environment. these results, together with those of a previous study of the head movements of barba ...	1991	24896939
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