Showing 1 - 20 results of 44 for search '"origin of birds"', query time: 0.42s Refine Results
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    Die nachweisbaren Strukturen der Federn von Archaeopteryx mit Anmerkungen zu Longisquama und diversen Proavis-Modellen by B. Stephan

    Published 2003-01-01
    “…Additionally, a discussion of Longisquama concerning the evolution of feathers, the origin of birds and the suitable model of Proavis are considered. …”
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    Article
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    Genetic relatedness among wild, domestic and Brazilian fighting roosters by FP Rodrigues, SA Queiroz, JMB Duarte

    Published 2006-06-01
    “…Except for the meat- and egg-type strains used in commercial poultry farms in Brazil, there are no scientific reports about the origin of birds from the genus Gallus that have been introduced in this country with domestication or fighting purposes. …”
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    Die nachweisbaren Strukturen der Federn von <i>Archaeopteryx</i> mit Anmerkungen zu <i>Longisquama</i> und diversen <i>Proavis</i>-Modellen by B. Stephan

    Published 2003-01-01
    “…Additionally, a discussion of <i>Longisquama</i> concerning the evolution of feathers, the origin of birds and the suitable model of <i>Proavis</i> are considered. …”
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    Article
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    Manx shearwaters Puffinus puffinus breeding in the western Atlantic follow a different migration route from their eastern Atlantic conspecifics by Fayet, AL, Shannon, P, Lyons, DE, Kress, SW

    Published 2020
    “…Although our sample size is very small, our findings reveal a previously unknown migration route of Manx Shearwaters and raise questions about the origin of birds on western North Atlantic colonies and the mechanisms controlling migratory direction in the species. …”
    Journal article
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    Re-evaluation of the Haarlem Archaeopteryx and the radiation of maniraptoran theropod dinosaurs by Christian Foth, Oliver W. M. Rauhut

    Published 2017-12-01
    “…Abstract Background Archaeopteryx is an iconic fossil that has long been pivotal for our understanding of the origin of birds. Remains of this important taxon have only been found in the Late Jurassic lithographic limestones of Bavaria, Germany. …”
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    Article
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    Swiftlets and edible bird's nest industry in Asia by Looi, Qi Hao, Omar, Abdul Rahman

    Published 2016
    “…The EBN market value varies from US$1000.00 to US$10,000.00 per kilogram depending on its grade, shape, type and origin. Hence, bird’s nest harvesting is considered a lucrative industry in many countries in Southeast Asia. …”
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    The origins of white-chinned petrels killed by long-line fisheries off South Africa and New Zealand by N.M.S. Mareile Techow, Colleen O’Ryan, Christopher J.R. Robertson, Peter G. Ryan

    Published 2016-06-01
    “…We identify the region of origin of birds killed by two long-line fisheries based on differences in the mitochondrial gene cytochrome b. …”
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    The neck as a keystone structure in avian macroevolution and mosaicism by Ryan D. Marek, Ryan N. Felice

    Published 2023-10-01
    “…Abstract Background The origin of birds from non-avian theropod dinosaur ancestors required a comprehensive restructuring of the body plan to enable the evolution of powered flight. …”
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    Article
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    The wings before the bird: an evaluation of flapping-based locomotory hypotheses in bird antecedents by T. Alexander Dececchi, Hans C.E. Larsson, Michael B. Habib

    Published 2016-07-01
    “…Neither was there a continuous trend of refinement for any of these biomechanical performances across phylogeny nor a signal of universal applicability near the origin of birds. None of these flap-based locomotory models appear to have been a major influence on pre-flight character acquisition such as pennaceous feathers, suggesting non-locomotory behaviours, and less stringent locomotory behaviours such as balancing and braking, played a role in the evolution of the maniraptoran wing and nascent flight stroke. …”
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    Air-filled postcranial bones in theropod dinosaurs: physiological implications and the 'reptile'-bird transition. by Benson, R, Butler, R, Carrano, M, O'Connor, P

    Published 2012
    “…Thus, relaxation of the relationship between body size and pneumatisation preceded the origin of birds and cannot be explained as an adaptation for flight. …”
    Journal article
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    Long-distance Dispersal Patterns of Male Cerulean Warblers (Dendroica cerulea) Measured by Stable-hydrogen Isotopes by M. Katherine. Girvan, Jason Jones, D. Ryan. Norris, Jennifer J. Barg, T. Kurt. Kyser, Raleigh J. Robertson

    Published 2007-12-01
    “…We used a likelihood-based assignment test to estimate the origin of birds the previous year and derived expected δD values for the entire Cerulean Warbler breeding range from precipitation-based maps. …”
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    Citril finches during the winter: patterns of distribution, the role of pines and implications for the conservation of the species by Borras, A., Senar, J. C., Alba-Sánchez, F., López-Sáez, J. A., Cabrera, J., Colomer, X., Cabrera, T.

    Published 2010-06-01
    “…The aim of this paper was to determine the current habitat used by Citril finches in north-eastern Spain during the winter, to analyse habitat suitability and to study movements, by investigating the origin of birds that overwinter in Catalonia. Citril finch distribution was modelled using both discriminant analysis and maximum entropy modelling, on the basis of species occurrences during winter in Catalonia (data from 1972-2009). …”
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    Comments on the Morphology of Basal Paravian Shoulder Girdle: New Data Based on Unenlagiid Theropods and Paleognath Birds by Fernando E. Novas, Matías J. Motta, Federico L. Agnolín, Federico L. Agnolín, Sebastián Rozadilla, Gastón E. Lo Coco, Federico Brissón Egli

    Published 2021-05-01
    “…In 1976 John Ostrom published an enlightening paper about the anatomical transformations in the shoulder girdle and forelimb elements along the origin of birds. Most of his ideas were based on comparing Archaeopteryx lithographica with the extant New World vulture Cathartes aura. …”
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    Molecular Diagnosis of Beak and Feather Disease in Native Brazilian Psittacines by AV Araújo, DA Andery, FC Ferreira Jr., MC Ortiz, MVR Marques, SY Marin, DAR Vilela, JS Resende, M Resende, RV Donatti, NRS Martins

    Published 2015-12-01
    “…However, it was not possible to associate BFDV infection with the geographical origin of birds and no local marker was detected. The rates of detection, although similar to other studies, indicate the tendency of a high incidence of the disease, possibly associated with stress, and high bird density and wide transmission in captivity conditions.…”
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    Avian encephalomyelitis virus in backyard chickens by Abdullah I. A. Al-Mubarak, Jamal Hussen, Mahmoud Kandee, Anwar A. G. Al-Kubati, Baraa Falemban, Maged Gomaa Hemida

    Published 2023-09-01
    “…The rearing of chickens in backyards could have an important role in the spread of certain diseases, particularly those of viral origin. Infected birds might be prone to many viral infections for several reasons, including a lack of vaccination programs, the mixing of different bird species in the same location, and the close interactions of these birds with wild and migratory birds carrying various pathogens. …”
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    Paravian Phylogeny and the Dinosaur-Bird Transition: An Overview by Federico L. Agnolin, Federico L. Agnolin, Federico L. Agnolin, Matias J. Motta, Matias J. Motta, Federico Brissón Egli, Federico Brissón Egli, Gastón Lo Coco, Gastón Lo Coco, Fernando E. Novas, Fernando E. Novas

    Published 2019-02-01
    “…Recent years witnessed the discovery of a great diversity of early birds as well as closely related non-avian theropods, which modified previous conceptions about the origin of birds and their flight. We here present a review of the taxonomic composition and main anatomical characteristics of those theropod families closely related with early birds, with the aim of analyzing and discussing the main competing hypotheses pertaining to avian origins. …”
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