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Albrecht Manegold - One of the best experts on this subject based on the ideXlab platform.

  • On the systematic position of the Black-collared Lovebird Agapornis swindernianus (Agapornithinae, Psittaciformes)
    Journal of Ornithology, 2014
    Co-Authors: Albrecht Manegold, Lars Podsiadlowski
    Abstract:

    Die systematische Einordnung des Grünköpfchens Agapornis swindernianus (Agapornithinae, Psittaciformes) Die erste molekulare und morphologische Analyse zur systematischen Einordnung des kaum bekannten Grünköpfchens ( Agapornis swindernianus ) lässt den Schluss zu, dass diese zentralafrikanische Art das Schwestertaxon zu allen übrigen Unzertrennlichen ( Agapornis ) darstellt. Die Verwandtschaftsbeziehungen des Grauköpfchens ( A. canus ) konnten dagegen nicht mit Hilfe der Analyse der Cytochrom b Sequenz geklärt werden. Morphologische Merkmale stützen aber frühere Hypothesen, nach denen das Grauköpfchen mit dem Orangeköpfchen ( A. pullarius ) und dem Tarantapapagei ( A. taranta ) auf eine nur ihnen gemeinsame Stammart zurückzuführen ist. Die hier vorgestellte Stammbaumhypothese legt die Vermutung nahe, dass die letzte gemeinsame Stammart der Unzertrennlichen afrikanischen Ursprungs ist, und dass Unzertrennliche ursprünglich Bewohner immergrüner tropischer Regenwälder waren, die sich möglicherweise bevorzugt von kleinen Fruchtsamen ernährten. Die Bevorzugung von Baumsavannen und ähnlichen offenen Habitaten sowie der Wechsel zu einer vor allem aus Grassamen bestehenden Nahrung erfolgte erst nach der Abspaltung der A. swindernianus -Linie in der Ahnenlinie der übrigen Agapornis -Arten. The first molecular and morphological study of the insufficiently known Black-collared Lovebird Agapornis swindernianus of West and Central Africa indicates that this species is the sister taxon of all the remaining Agapornis parrots. The systematic position of the Grey-headed Lovebird A. canus could not be convincingly resolved by the sequence analysis of the cytochrome b gene, but morphological characters support earlier assumptions that this species forms a clade with the Red-faced and the Black-winged Lovebird, A. pullarius and A. taranta. The new phylogeny of Agapornis presented here suggests that the last common ancestor of lovebirds originated on the African continent, and that it was a more arboreal forest-dweller, probably with a preference for small fruit seeds. Thus, a preference to more open woodlands and a change to a more granivorous diet must have evolved after the split of the lineages leading to A. swindernianus and all the remaining lovebird species.

  • on the systematic position of the black collared lovebird Agapornis swindernianus agapornithinae psittaciformes
    Journal of Ornithology, 2014
    Co-Authors: Albrecht Manegold, Lars Podsiadlowski
    Abstract:

    The first molecular and morphological study of the insufficiently known Black-collared Lovebird Agapornis swindernianus of West and Central Africa indicates that this species is the sister taxon of all the remaining Agapornis parrots. The systematic position of the Grey-headed Lovebird A. canus could not be convincingly resolved by the sequence analysis of the cytochrome b gene, but morphological characters support earlier assumptions that this species forms a clade with the Red-faced and the Black-winged Lovebird, A. pullarius and A. taranta. The new phylogeny of Agapornis presented here suggests that the last common ancestor of lovebirds originated on the African continent, and that it was a more arboreal forest-dweller, probably with a preference for small fruit seeds. Thus, a preference to more open woodlands and a change to a more granivorous diet must have evolved after the split of the lineages leading to A. swindernianus and all the remaining lovebird species.

  • two new parrot species psittaciformes from the early pliocene of langebaanweg south africa and their palaeoecological implications
    Ibis, 2013
    Co-Authors: Albrecht Manegold
    Abstract:

    Two new parrot species (Psittaciformes) are described from the early Pliocene Varswater Formation at Langebaanweg, South Africa, an area where no parrots currently are found. A coracoid, humeri, ulnae, carpometacarpi, tibiotarsi and tarsometatarsi of at least four individuals are assigned to a new species of lovebird Agapornis. Additional tarsometatarsi of at least five individuals including a nestling are referred to a new genus and species of Psittacinae, a taxon endemic to Africa comprising the extant genera Poicephalus and Psittacus. Both species form the as yet earliest geological record of parrots in Africa and document the early diversification of the taxa Agapornis and Psittacinae. Evidence for parrots in general, and a putative graminivorous species of lovebird in particular, indicates that woodlands as well as grasslands were present at Langebaanweg during the early Pliocene, which is consistent with current hypotheses on the palaeoenvironment at and around this site.

Andreatti Filho - One of the best experts on this subject based on the ideXlab platform.

Simon Yung Wa Sin - One of the best experts on this subject based on the ideXlab platform.

  • development and characterization of microsatellite markers in rosy faced and other lovebirds Agapornis spp using next generation sequencing
    Molecular Biology Reports, 2020
    Co-Authors: Derek Kong Lam, Simon Yung Wa Sin
    Abstract:

    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. nigrigenis, A. fischeri, A. pullarius, and A. canus, and two closely related outgroups (i.e. Bolbopsittacus lunulatus and Loriculus galgulus). We first performed whole-genome re-sequencing on five individuals of A. roseicollis to identify potential polymorphic loci. Out of 37 loci tested in 11 A. roseicollis, 27 loci were demonstrated to be polymorphic, with the number of the alleles ranging from 2 to 7 (mean = 3.963). The observed heterozygosity ranged from 0 to 0.875 (mean = 0.481) and expected heterozygosity ranged from 0.233 to 0.842 (mean = 0.642). Five loci (Agro-A13, p < 0.01; Agro-A15, p < 0.05; Agro-A43, p < 0.05, Agro-A65, p < 0.05; Agro-A67, p < 0.05) were detected to deviate from Hardy-Weinberg equilibrium, with the presence of null alleles suggested in locus Agro-A13 and Agro-A77. The exclusion powers for PE1 and PE2 are 0.997 and 0.999, respectively. The 27 novel polymorphic markers developed here will be useful for parentage and kinship assignment and population genetics study in Agapornis, and provide a tool for scientific research, captive breeding industry, and invasion and conservation management of these species.

Fabrizio Grandi - One of the best experts on this subject based on the ideXlab platform.

Hungchih Kuo - One of the best experts on this subject based on the ideXlab platform.

  • case report psittacine pox virus infection in Agapornis roseicollis
    Taiwan Veterinary Journal, 2017
    Co-Authors: Jihching Yeh, Chris Chi, Chioulin Chen, Minghuang Chang, Hungchih Kuo
    Abstract:

    This case report describes the outbreak of a combined diphtheritic and cutaneous form of psittacine pox in Agapornis roseicollis in Tainan, Taiwan in June, 2015. Scabs were observed on the legs and...

  • CASE REPORT: PSITTACINE POX VIRUS INFECTION IN Agapornis ROSEICOLLIS
    Taiwan Veterinary Journal, 2017
    Co-Authors: Jihching Yeh, Chris Chi, Chioulin Chen, Minghuang Chang, Hungchih Kuo
    Abstract:

    This case report describes the outbreak of a combined diphtheritic and cutaneous form of psittacine pox in Agapornis roseicollis in Tainan, Taiwan in June, 2015. Scabs were observed on the legs and eyelids, the bases of beaks, and diphtheritic mucous membranes were observed on the upper digestive and respiratory tracts, too. In histopathological examinations, epitheliums and osteoblasts in nasal bone contained eosinophilic intracytoplasmic inclusion bodies in stratum spinosum. The infected bird beak tissue exhibited brick-shaped virions with biconcave dumbbell-shaped core by transmission electron microscopy. From the previous reports, psittacine pox virus in Taiwan may be more virulent than other reported strains and still occurs as a sporadic disease in Taiwan. This is the first report in the world discussed about the infection of osteoblast by poxvirus.