Results 61 to 70 of about 2,126 (153)

Disruption of FEM1C-W gene in zebra finch: evolutionary insights on avian ZW genes [PDF]

, 2009
Sex chromosome genes control sex determination and differentiation, but the mechanisms of sex determination in birds are unknown. In this study, we analyzed the gene FEM1C which is highly conserved from Caenorhabditis elegans to higher vertebrates and ...
Arthur P. Arnold, Kathy Kampf, Yuichiro Itoh   +2 more
core   +1 more source

Evolutionary Dynamics of Intron Size, Genome Size, and Physiological Correlates in Archosaurs [PDF]

, 2002
It has been proposed that intron and genome sizes in birds are reduced in comparison with mammals because of the metabolic demands of flight. To test this hypothesis, we examined the sizes of 14 introns in a nonflying relative of birds, the American ...
Edwards, Scott, Waltari, Eric
core   +1 more source

Aves da fazenda Nhumirim, Pantanal da Nhecolândia, MS. [PDF]

, 2019
Neste trabalho é apresentada uma caracterização da comunidade de aves ocorrentes na Estação Experimental da fazenda Nhumirim, contribuindo com o desenvolvimento da Ornitologia na região.bitstream/CPAP/55966/1/DOC81.pdfFormato ...
NUNES, A. P., TICIANEL, F. A. T., TOMAS, W. T.   +2 more
core  

Avian influenza: global assessment of potential pandemic of the twenty first century [PDF]

, 2009
The emergence of highly pathogenic avian influenza (HPAI) of Asian lineage and the subsequent spillover to other parts of the globe and spread of Eurasian-Africa H5N1 epidemic into domestic, wild birds and human have generated unprecedented attention in ...
Abubakar, Mustapha Bala, Bejo, Mohd Hair, Ideris, Aini, Omar, Abdul Rahman   +3 more
core   +1 more source

First report of Amblyomma papuanum hirst (Acari: Ixodida: Ixodidae) from the dwarf cassowary, Casuarius bennetti gould (Aves: Struthioniformes: Casuariidae), with additional records of parasitism of Casuarius spp. by this tick

, 2006
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Robbins, Richard G., Bush, Sarah Elizabeth   +1 more
openaire   +1 more source

Determinación del sexo en aves [PDF]

, 2014
Traballo fin de grao (UDC.CIE ...
González Suurbach, Sofía
core  

The birds of Estação Ecológica Serra Geral do Tocantins [PDF]

A Estação Ecológica Serra Geral do Tocantins (EESGT) é uma das maiores Unidades de Conservação dentro do Bioma Cerrado. A avifauna desta UC foi inventariada entre os dias 25 de janeiro e 15 de fevereiro de 2008.
MACHADO, Érika, PIACENTINI, Vítor de Queiroz, PINHEIRO, Renato Torres, REGO, Marco Antonio, REIS, Elivânia, SCHUNCK, Fabio, SILVEIRA, Luís Fábio   +6 more
core   +1 more source

Birds of the Estação Ecológica de Itirapina, State of São Paulo, Brazil [PDF]

, 2008
O cerrado é um dos biomas mais ameaçados no mundo, apresentando algumas das maiores taxas de destruição causadas principalmente pela agropecuária. Poucos estudos têm avaliado a diversidade local de aves no cerrado, especialmente em áreas marginais desse ...
DEVELEY, Pedro Ferreira, GRANZINOLLI, Marco Antonio Monteiro, MOTTA-JUNIOR, José Carlos   +2 more
core   +1 more source

Avian visual pigments: Characteristics, spectral tuning, and evolution [PDF]

, 2007
Birds are highly visual animals with complex visual systems. In this article, we discuss the spectral characteristics and genetic mechanisms of the spectral tuning of avian visual pigments.
Hart, NS, Hunt, DM
core   +2 more sources

The Struthionidae and Pelagornithidae (Aves: Struthioniformes, Odontopterygiformes) from the late Pliocene of Ahl al Oughlam, Morocco

, 2008
The Pliocene locality of Ahl al Oughlam is situated at the southeastern limit of the city of Casablanca, in Morocco, on an ancient seashore of the Atlantic Ocean. It has yielded a very rich vertebrate fauna (macro- and micromammals, birds, reptiles, amphibians and fishes) including both terrestrial and marine forms. On the basis of biostratigraphy, the
Mourer-Chauviré, Cécile, Geraads, Denis   +1 more
openaire   +2 more sources