Results 21 to 30 of about 137,387 (310)

Formaldehyde-contaminated feed induces histopathological changes in the testes of adult pigeons (Columba livia)

open access: yesJournal of Advanced Biotechnology and Experimental Therapeutics, 2020
Formaldehyde (FA), a ubiquitous environmental pollutant, has long been suspected to possess reproductive toxicity. Here, we investigated the histopathological alteration of male gonads following exposure to FA-contaminated feed (40% aqueous solution of ...
Mohammad Rabiul Karim   +4 more
doaj   +1 more source

Categories, concepts, and calls : auditory perceptual mechanisms and cognitive abilities across different types of birds. [PDF]

open access: yes, 2013
Although involving different animals, preparations, and objectives, our laboratories (Sturdy's and Cook's) are mutually interested in category perception and concept formation.
Cook, Robert   +4 more
core   +1 more source

The pigeon’s concept of pigeon [PDF]

open access: yesPsychonomic Science, 1971
Pigeons were trained to discriminate between the presence and absence of a pigeon in photographic displays projected on a response key. Irrelevant cues were reduced as much as possible, while the differences between the objects were of sufficient variety and complexity to ensure that mastery of the discrimination would require the use of a concept. The
Jean Poole, D. G. Lander
openaire   +1 more source

Role of Pigeons in the Transmission of Avian Avulavirus (Newcastle Disease-Genotype VIId) to Chickens

open access: yesAnimals, 2019
Newcastle disease is an acute fatal disease of poultry. The aim of this study was to determine the dynamics of the transmission of avian avulavirus (velogenic viscerotropic Newcastle disease-genotype VIId) from either intramuscularly (IM)- or ...
Hany F. Ellakany   +11 more
doaj   +1 more source

Patterns and risk factors of avian influenza A(H5) and A(H9) virus infection in pigeons and quail at live bird markets in Bangladesh, 2017–2021

open access: yesFrontiers in Veterinary Science, 2022
The avian influenza virus (AIV) impacts poultry production, food security, livelihoods, and the risk of transmission to humans. Poultry, like pigeons and quail farming, is a growing sector in Bangladesh.
Ariful Islam   +11 more
doaj   +1 more source

Molecular characterization of Trichomonas gallinae isolates recovered from the Canadian Maritime provinces’ wild avifauna reveals the presence of the genotype responsible for the European finch trichomonosis epidemic and additional strains [PDF]

open access: yes, 2015
Finch trichomonosis, caused by Trichomonas gallinae, emerged in the Canadian Maritime provinces in 2007 and has since caused ongoing mortality in regional purple finch (Carpodacus purpureus) and American goldfinch (Carduelis tristis) populations ...
BECKI LAWSON   +10 more
core   +2 more sources

Near-Random Distribution of Chromosome-Derived Circular DNA in the Condensed Genome of Pigeons and the Larger, More Repeat-Rich Human Genome

open access: yesGenome Biology and Evolution, 2019
Extrachromosomal circular DNA (eccDNA) elements of chromosomal origin are known to be common in a number of eukaryotic species. However, it remains to be addressed whether genomic features such as genome size, the load of repetitive elements within a ...
Henrik D. Møller   +4 more
semanticscholar   +1 more source

Osteological characters for the identification of Caribbean columbids

open access: yesNovitates Caribaea, 2021
Columbid remains are commonly recovered from Caribbean archaeological and paleontological sites. Identifying specimens to species level is therefore likely to yield a wealth of information concerning species diversity and changes in their distribution ...
Monica Gala   +2 more
doaj   +1 more source

Pigeons discriminate continuous versus discontinuous line segments [PDF]

open access: yes, 2007
Three experiments examined various facets of the perception of continuous and discontinuous line segments in pigeons. Pigeons were presented with 2 straight lines that were interrupted by a gap.
Johnston, Siobhan   +2 more
core   +1 more source

Pigeon breeders’ lung: pigeon intestinal mucin, an antigen distinct from pigeon IgA [PDF]

open access: yesClinical and Experimental Immunology, 1991
SUMMARY Antigens identified by indirect immunofluorescence staining and specific for sera from patients with pigeon breeders’ lung or healthy pigeon breeders, have been isolated from pigeon intestinal mucus. Two antigenic peaks, one pigeon intestinal mucin and the other IgA, were separated by equilibrium centrifugation of water-soluble ...
A, Todd, R M, Coan, A, Allen
openaire   +2 more sources

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