| [conditioning of the avoidance to the contact call in the red face lovebird (agapornis roseicollis, aves, psittacidae)]. | two experiments were run on 10 lovebirds to test the reinforcing effect of the social call in an operant conditioning task. in the first experiment, the reinforced behavior (perching) which provoked the occurence of the call decreased. in the second experiment, where the same behavior stopped the continuous emission of the call, the behavior increased. this behavior may results from an avoidance to the call recorded from a lovebird which do not belong to the group of our experimental birds. | 1976 | 135621 |
| microsporidian infection in the pied peach-faced lovebird (agapornis roseicollis). | a microsporidian infection was diagnosed in a pied peach-faced lovebird (agapornis roseicollis) which had died after an illness of 2 days. the parasite was observed in the liver, kidney, and small intestine. lesions were most severe in the liver, with numerous organisms adjacent to areas of hepatic necrosis. although the organisms were seen within renal tubules and within the intestinal mucosa, inflammatory lesions in those sites were minimal. the microsporidian nature of the parasite was confir ... | 1978 | 417712 |
| do colours affect 'normal' behaviour of laboratory and farm animals? instantaneous change of behaviour by presentation of red in the peach-f. | in spite of genetic and environmental standardisation in farm and laboratory animal science, a considerable amount of variation in the results of comparable experiments remains. this presumably depends upon the individual variability within a species, and upon differences of various species in their specific demands to the environment in captivity. due to a discovery in the southwest-african lovebird species agapornis roseicollis, used as a conventional laboratory animal in bioacoustic research, ... | 1979 | 575907 |
| [agapornis roseicollis (vieillot) (aves, psittacidae, loriini) as an experimental animal in psychoacoustic research]. | | 1977 | 919808 |
| hearing and communication in birds: the cocktail-party-effect in intraspecific communication of agapornis roseicollis (aves, psittacidae). | | 1975 | 1207375 |
| histopathological survey of protozoa, helminths and acarids of imported and local psittacine and passerine birds in japan. | a total of 534 psittacine and passerine birds consisting of 241 imported and 293 local birds were examined histologically. as a result, the following parasites were found: giardia (86 cases), knemido-coptes (26 cases), coccidia (10 cases), ascaridia (6 cases), cryptosporidium (5 cases), sarcocystis (5 cases), tapeworm (4 cases), microfilaria (2 cases), hexamita (1 case), and spiroptera (1 case). high incidences of giardiasis and knemido-coptic infestation were detected in the local birds, but ra ... | 1992 | 1297009 |
| polymerase chain reaction assay for avian polyomavirus. | a polymerase chain reaction assay was developed for detection of budgerigar fledgling disease virus (bfdv). the assay used a single set of primers complementary to sequences located in the putative coding region for the bfdv vp1 gene. the observed amplification product had the expected size of 550 bp and was confirmed to derive from bfdv dna by its restriction digestion pattern. this assay was specific for bfdv and highly sensitive, being able to detect as few as 20 copies of the virus. by using ... | 1991 | 1647403 |
| a novel dna virus associated with feather inclusions in psittacine beak and feather disease. | the nature of feather inclusions was characterized in 32 psittacine birds (30 cockatoos, one peach-faced lovebird (agapornis roseicollis), and one red-lored amazon parrot (amazona autumnalis autumnalis] with naturally-acquired psittacine beak and feather disease. intranuclear inclusions within feather epithelial cells and intracytoplasmic inclusions within macrophages in the feather epithelium and pulp cavity contained psittacine beak and feather disease viral antigen when stained by the avidin- ... | 1991 | 1949509 |
| ultrastructural, protein composition, and antigenic comparison of psittacine beak and feather disease virus purified from four genera of psittacine birds. | psittacine beak and feather disease (pbfd) virus, was purified from diseased tissues of a lesser sulphur-crested cockatoo (cacatua sulphurea), a black palm cockatoo (probosiger aterrimus), a red-lored amazon parrot (amazona autumnalis), and a peach-faced lovebird (agapornis roseicollis). the histopathology of diseased feathers and follicular epithelium from the different species was compared; basophilic intranuclear inclusion bodies were identified in the follicular epithelium and intracytoplasm ... | 1990 | 2338723 |
| immunization against psittacine pox. | pox virus isolated from psittacine birds was used as a vaccine in trials with love birds (agapornis roseicollis). the vaccine was applied by wing-web puncture using single- and double-needle applicators. immunity was effective against challenge with virulent psittacine pox virus administered via the feather follicle/thigh. when unvaccinated contact control birds were placed with the vaccinated individuals immediately post-vaccination, virus spread was evident. however, susceptible birds placed w ... | 1985 | 3000341 |
| the early ontogeny of ventilation and homeothermy in an altricial bird, agapornis roseicollis (psittaciformes). | the body temperature (tb) of brooded agapornis nestlings increased with age from 36.2 on the day of hatching to 38.9 degrees c on day 11.5, whereas the thermally neutral ambient temperature (ta,n) decreased with age. the tb of nestlings after a 20 min exposure to ta approximately equal to 5 degrees c less than ta,n increased from 31.9 on day 0.5 to 37 degrees c on day 11.5. at ta,n both resting vo2 and mass-independent resting vo2 increased with age. ventilation frequency (f) at ta,n increased w ... | 1986 | 3764122 |
| [detection of a pox-virus in lovebirds (agapornis personata and agapornis roseicollis). preliminary communication]. | | 1971 | 4323907 |
| [behavioral development of agapornis roseicollis hand-reared in isolation]. | | 1974 | 4476964 |
| structure and colour-production of the blue barbs of agapornis roseicollis and cotinga maynana. | | 1971 | 5573143 |
| oestrogen stimulation of nest material preparation in the peach-faced lovebird (agapornis roseicollis). | | 1967 | 6055101 |
| varied egg gas conductance, air cell gas tensions and development in agapornis roseicollis. | different color varieties of the small african parrot, agapornis roseicollis , lay eggs which differ by as much as a factor of 7 in gas conductance. oxygen consumption (vo2) and air cell gas tensions (pao2, paco2) were measured repeatedly on individual eggs during development. no differences were observed in the ontogeny of vo2, incubation period, or hatchling mass of eggs with different gas conductances, in spite of large differences in pao2 and paco2. low conductance eggs reached pao2 as low a ... | 1984 | 6429802 |
| auditory and visual stimuli as reinforcers among lovebirds (agapornis roseicollis). | | 1980 | 7362591 |
| microsporidiosis in a peach-faced lovebird (agapornis roseicollis). | | 1994 | 8172549 |
| application of enzyme-immunohistochemistry for the diagnosis of aspergillosis, candidiasis, and zygomycosis in three lovebirds. | aspergillosis, candidiasis, and zygomycosis were diagnosed in tissues from three lovebirds (agapornis roseicollis) using indirect enzyme-immunohistochemical techniques. in these techniques, the first antibody was raised against fungal antigen. a second antibody, which was raised in another animal species, was added to link the first antibody to enzyme-immunocomplexes. the reactivity of specific monoclonal and polyclonal antibodies was visualized by immunoreactivity of alkaline phosphatase anti-a ... | 1993 | 8257396 |
| [development of telencephalon in agapornis roseicollis vieillot (psittacidae) and its relationship to the evolution of the telencephalon in vertebrates]. | 1. the cerebral anlage of agapornis roseicollis was investigated in serially cut slices during the developmental stages before hatching (day 3-day 20) by light microscopical quantitative and qualitative methods. 2. during earlier stages of development, the brain anlage is divided in three dorsally and four ventrally situated, longitudinally oriented matrix zones (d1-d3, v1-v4 according to kuhlenbeck). in this developing system, mainly the lateral part of the telencephalic wall including its dors ... | 1993 | 8308262 |
| encephalitozoon hellem in two eclectus parrots (eclectus roratus): identification from archival tissues. | members of the phylum microspora are obligate, intracellular, single-celled parasites identified in a wide range of vertebrate and invertebrate hosts. only a few cases of microsporidial infections have been documented in psittacine birds including peach-faced, masked, and fischer's lovebirds (agapornis roseicollis, a. personata, and a. fischeri, respectively), budgerigars (melopsittacus undulatus), and a double yellow-headed amazon parrot (amazona ochrocephala). parasite identification has typic ... | 1998 | 9864855 |
| isolation and characterization of an avian isolate of encephalitozoon hellem. | members of the phylum microspora are a group of unusual, obligate intracellular eukaryotic parasites that infect a wide range of hosts. however, there are a limited number of microsporidial infections reported in avian hosts, and no parasite species has been defined as an avian pathogen. a microsporidian organism was recovered from the droppings of a clinically normal peach-faced lovebird (agapornis roseicollis) and established in in vitro culture. intermittent parasite spore shedding was docume ... | 2000 | 11085220 |
| metastatic subcutaneous sarcoma and abdominal carcinoma in a peach-faced lovebird (agapornis roseicollis). | a 2-year-old male peach-faced lovebird (agapornis roseicollis) with a subcutaneous sarcoma on the right carpus was treated by surgical amputation. three months after surgery, lung metastases causing clinical signs of dyspnoea were diagnosed radiographically and subsequently the bird was euthanased. at necropsy, a tumour firmly attached to the right testis, kidney and lung was found, and several tumours were present in the lung parenchyma. histopathology revealed a mesenchymal growth pattern in t ... | 2002 | 12425797 |
| analysis of the beak and feather disease viral genome indicates the existence of several genotypes which have a complex psittacine host specificity. | a study was made of the phylogenetic relationships between fifteen complete nucleotide sequences as well as 43 nucleotide sequences of the putative coat protein gene of different strains belonging to the virus species beak and feather disease virus obtained from 39 individuals of 16 psittacine species. the species included among others, cockatoos ( cacatuini), african grey parrots ( psittacus erithacus) and peach-faced lovebirds ( agapornis roseicollis), which were infected at different geograph ... | 2004 | 15290360 |
| isolation of acinetobacter lwoffii from a lovebird (agapornis roseicollis) with severe respiratory symptoms. | although acinetobacter lwoffii is generally considered an ubiquitous and opportunistic bacterium, this germ has been isolated from the pulmonary and abdominal air sac swabs obtained from a lovebird (agapornis roseicollis), which died of a severe respiratory disease. bacteriological tests (phenotypic and genotypic) led to the identification of a. lwoffii in pure culture. all the other parrots in the breeding centre were treated orally with oxytetracycline for 14 days and 3 months later no bird sh ... | 2005 | 15999637 |
| new record of afrimenopon waar (eichler) (phthiraptera: menoponidae) from budgerigar melopsittacus undulatus (psittaciformes: psittacidae) from karachi, pakistan. | chewing lice of the species afrimenopon waar (eichler) were collected from captive budgerigar melopsittacus undulatus (shaw) in pakistan. this is the first record of amblyceran lice from this host. it is also the first record of the genus afrimenopon from pakistani region. the primary host species of afrimenopon waar is the rosy-faced lovebird agapornis roseicollis (vieillot). the finding of a. waar on budgerigars is, most likely, a result of a contamination in captivity. morphological variation ... | 2007 | 17334969 |
| chromosome repatterning in three representative parrots (psittaciformes) inferred from comparative chromosome painting. | parrots (order: psittaciformes) are the most common captive birds and have attracted human fascination since ancient times because of their remarkable intelligence and ability to imitate human speech. however, their genome organization, evolution and genomic relation with other birds are poorly understood. chromosome painting with dna probes derived from the flow-sorted macrochromosomes (1-10) of chicken (gallus gallus, gga) has been used to identify and distinguish the homoeologous chromosomal ... | 2007 | 17675844 |
| evolution of craniofacial novelty in parrots through developmental modularity and heterochrony. | parrots (order psittaciformes) have developed novel cranial morphology. at the same time, they show considerable morphological diversity in the cranial musculoskeletal system, which includes two novel structures: the suborbital arch and the musculus (m.) pseudomasseter. to understand comprehensively the evolutionary pattern and process of novel cranial morphology in parrots, phylogenetic and developmental studies were conducted. firstly, we undertook phylogenetic analyses based on mitochondrial ... | 2007 | 17976055 |
| unusual lesions associated with avian poxvirus infection in rosy-faced lovebirds (agapornis roseicollis). | an epornitic of avian pox occurred in rosy-faced lovebirds (agapomis roseicollis). the infected birds showed a variety of lesions including cutaneous, diphtheritic, systemic and oncogenic entities. proliferative changes with cytoplasmic inclusion bodies in the cornea, bursa of fabricius, and cranial and nasal bones which were found in the present cases have not been described previously. electron microscopic examination of the skin, cornea, and cranial and nasal bones revealed poxvirus virions i ... | 1997 | 18483891 |
| cutaneous myelolipoma in a peach-faced lovebird (agapornis roseicollis). | a case of cutaneous myelolipoma in a 2.5-year-old female peach-faced lovebird is reported. histopathologically, the subcutaneous mass on the tip of the left wing consisted of well circumscribed adipose tissue containing several aggregates of * haematopoietic cells. heterophilic differentiation was most prominent in them. | 1996 | 18645843 |
| inclusion bodies and hepatopathies in psittacines. | intranuclear inclusion bodies in hepatic cells of seven peach-faced lovebirds (agapornis roseicollis), two black-masked love birds (a. personata) and two galahs (cacatua roseicapilla) were examined electron microscopically. thin sections were prepared from formalin-fixed epon-embedded tissue or from haematoxylin and eosin stained sections that were subsequently embedded in epon. discrete and diffuse eosinophilic inclusions in hepatocytes of eight birds were composed of filaments and virus partic ... | 1987 | 18766647 |
| toward resolving deep neoaves phylogeny: data, signal enhancement, and priors. | we report three developments toward resolving the challenge of the apparent basal polytomy of neoavian birds. first, we describe improved conditional down-weighting techniques to reduce noise relative to signal for deeper divergences and find increased agreement between data sets. second, we present formulae for calculating the probabilities of finding predefined groupings in the optimal tree. finally, we report a significant increase in data: nine new mitochondrial (mt) genomes (the dollarbird, ... | 2009 | 18981298 |
| treatment of otitis externa associated with corynebacterium kroppenstedtii in a peach-faced lovebird (agapornis roseicollis) with an acetic and boric acid commercial solution. | a 5-year-old lovebird (agapornis roseicollis) was presented with scaly crusts around both external ear openings and exudate present around the left ear. the bird had been treated with ivermectin and enrofloxacin without success. a pure culture of corynebacterium kroppenstedtii was isolated from both ears. after susceptibility testing, a treatment of an acetic and boric acid solution administered topically 3 times daily was prescribed. the scaly appearance disappeared after 14 days of treatment a ... | 2009 | 19673461 |
| molecular characterization of cryptosporidium spp. from fecal samples of birds kept in captivity in brazil. | the aim of this study was to determine the prevalence of cryptosporidium species and genotypes in birds kept in captivity in brazil. a total of 966 samples from 18 families of birds was collected and stored in 5% potassium dichromate solution at 4 degrees c until processing. oocysts were purified in sheather sugar solution following extraction of genomic dna. molecular analyses were performed using nested-pcr for amplification of fragments of the 18s subunit of rrna gene and of the actin gene. a ... | 2009 | 19683397 |
| spermatozoa characteristics in six psittacine species using light microscopy. | even though breeding of companion birds has increased continuously for years, the fecundity assessment of birds has hardly been acknowledged. knowledge of the structure of spermatozoa is crucial for evaluation of the basic reproductive biology of any species as well as for phylogenetic research and cladistic analyses of internal relationships. spermatozoa of six different psittacine species (nymphicus hollandicus, myiopsitta monachus, agapornis roseicollis, melopsittacus undulatus, tanygnathus l ... | 2009 | 20456089 |
| cryptosporidium avian genotype iii as a possible causative agent of chronic vomiting in peach-faced lovebirds (agapornis roseicollis). | in the present study, cryptosporidium oocysts were found, by light microscopy, in 37 fecal samples of peach-faced lovebirds (agapornis roseicollis). cryptosporidium avian genotype iii was isolated in 13 of the 37 infected birds by sequence analysis of the small subunit ribosomal rna and the actin genes. all of the birds showed chronic vomiting and weight loss with enlargement of isthmi, narrowed proventricular lumens, and thickened proventricular walls radiographically. cryptosporidium parasites ... | 2010 | 20945797 |
| encephalitozoon hellem infection in aviary passerine and psittacine birds in spain. | a european goldfinch (carduelis carduelis), a canary (serinus canaria), and a lovebird (agapornis roseicollis) captive-bred at three different private aviaries in spain were submitted for necropsy with a history of weakness and ruffled feathers, weight loss associated with glossitis, and respiratory disease, respectively. microscopically, enterocytes in the jejunum and ileum contained colonies of gram- and stamp-positive, oval to elliptical microorganisms within parasitophorous vacuoles in the a ... | 2016 | 26921040 |
| toxoplasmosis in a pet peach-faced lovebird (agapornis roseicollis). | toxoplasma gondii atypical type ii genotype was diagnosed in a pet peach-faced lovebird (agapornis roseicollis) based on histopathology, immunohistochemistry, and multilocus dna typing. the bird presented with severe neurological signs, and hematology was suggestive of chronic granulomatous disease. gross post-mortem examination revealed cerebral hemorrhage, splenomegaly, hepatitis, and thickening of the right ventricular free wall. histologic sections of the most significant lesions in the brai ... | 2015 | 26797444 |
| molecular investigation of cryptosporidium in small caged pets in northeast china: host specificity and zoonotic implications. | this study screened 151 pet-derived fecal specimens randomly collected from four commercial markets in northeast china for the presence of cryptosporidium by genus-specific nested pcrs of the small subunit rrna gene. of these, 14 specimens (9.3 %) from nine species of birds, two types of rodents, and a hedgehog were positive for cryptosporidium. sequence analysis on the pcr-positive isolates facilitated identification of three cryptosporidium species (c. baileyi, c. galli, and c. ubiquitum) and ... | 2016 | 27107987 |
| synovial sarcoma associated with indwelling intramedullary pin in a peach-faced lovebird (agapornis roseicollis). | sarcoma developing in association with a metallic orthopedic procedure is an uncommon but well-recognized complication in mammals. we report on a synovial sarcoma that developed at the site of an intramedullary pin after surgery to treat a bone fracture. a 17-year-old female peach-faced lovebird (agapornis roseicollis) developed a spherical mass on the distal right dorsal wing at a site that was previously fractured and surgically repaired with an indwelling intramedullary pin. the right wing wa ... | 2016 | 27088741 |
| use of computer-assisted semen analysis for evaluation of rosy-faced lovebird (agapornis roseicollis) semen collected in different periods of the year. | the seminal characteristics of the rosy-faced lovebird (agapornis roseicollis) were analyzed, both in and out of season, using a computer-aided sperm analyzer. avian semen collection and artificial insemination techniques have great potential for captive breeding programs, and computer-aided sperm analyzer allows an objective and quantitative assessment of sperm motility and kinetics. although agapornis roseicollis is a largely diffuse species, its seminal parameters have never been fully invest ... | 2015 | 25441497 |
| fabrication of zno photonic amorphous diamond nanostructure from parrot feathers for modulated photoluminescence properties. | a zno photonic amorphous diamond nanostructure was successfully synthesised using a feather barb of the rosy-faced lovebird as supporting template via a facile sol-gel process. different from ordered structures, an isotropic pbg around 500 nm was evidenced from reflectance spectra and an optical metallurgical microscopy image, which overlaps with the visible emission peak of zno. as a result, the inhibition of visible emission inside the pbg and the enhancement of uv emission at the pbg edges ha ... | 2011 | 22031229 |
| granulomatous dermatitis in peach-faced lovebirds. | | 1987 | 3426471 |
| approach-withdrawal behavior of peach-faced lovebirds, agapornis roseicolis, and its modification by brain lesions. | | 1968 | 5674279 |
| chlamydia psittaci in feral rosy-faced lovebirds ( agapornis roseicollis) and other backyard birds in maricopa county, arizona. | in 2013, a mortality event of nonnative, feral rosy-faced lovebirds ( agapornis roseicollis) in residential backyards in maricopa county, arizona, usa was attributed to infection with chlamydia psittaci. in june 2014, additional mortality occurred in the same region. accordingly, in august 2014 we sampled live lovebirds and sympatric bird species visiting backyard bird feeders to determine the prevalence of dna and the seroprevalence of antibodies to c. psittaci using real-time pcr-based testing ... | 2018 | 29369723 |
| draft de novo genome sequence of agapornis roseicollis for application in avian breeding. | in aviculture, lovebirds are considered one of the most popular birds to keep. this african parakeet is known for its range of plumage colors and ease to tame. plumage variation is the most important price-determining trait of these birds, and also the main selection criterion for breeders. currently, no genetic screening tests for traits of economic importance or to confirm pedigree data are available for any of the nine lovebird species. as a starting point to develop these tests, the de novo ... | 2017 | 29035135 |
| evidence of amphotericin b resistance in macrorhabdus ornithogaster in australian cage-birds. | amphotericin b is widely used for the treatment of macrorhabdus ornithogaster infections. to date, however, there have been no randomized controlled trials confirming its efficacy where cure was confirmed by postmortem examination. to determine the efficacy of amphotericin b against m. ornithogaster, a three-part study was undertaken. treatment outcomes of m. ornithogaster infected birds treated amphotericin b were reviewed. a pilot treatment trial with two naturally infected birds (melopsittacu ... | 2019 | 30085075 |
| development and characterization of microsatellite markers in rosy-faced and other lovebirds (agapornis spp.) using next-generation sequencing. | agapornis are a group of small african parrots that are heavily traded around the world. they are invasive species in many places, but some of them are listed as vulnerable or near threatened. however, the genetic tools for assessing inter-individual relationships, population structure, and genetic diversity of these birds are very limited. therefore, we developed polymorphic microsatellite markers in a. roseicollis and tested the transferability on 5 lovebird species including a. personatus, a. ... | 2020 | 32607954 |
| bilateral osteoma cutis in a peach-faced lovebird (agapornis roseicollis). | an osteoma is an infrequent tumor documented in avian species. an adult female peach-faced lovebird (agapornis roseicollis) with a history of previous trauma was examined due to the presence of bilateral hard and yellowish-white masses in the radio-cubital humerus junction. histopathological dermal examination revealed a non-neoplastic process of mesenchymal origin, characterized by the formation of well-differentiated trabecular bone, multiple areas of medullary bone and loose connective tissue ... | 2020 | 32238670 |