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| Registros recuperados: 119 | |
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| Duca,Charles; Marini,Miguel Â.. |
| For colonial bird species, egg hatching synchrony has been considered an important factor in their reproductive success. The Red-rumped Cacique, Cacicus haemorrhous (Linnaeus, 1766), is a Passeriformes species (Icterinae) that reproduces in colonies in which groups of females lay their eggs at different periods during the reproductive season. The objective of this study was to evaluate if there was a variation in the reproductive success among C. haemorrhous females groups that lay eggs in different periods along the reproductive season. A total of 192 nests from four colonies were monitored at Parque Estadual do Rio Doce, Minas Gerais state, Brazil, and used to calculate the nest survival probability in different periods (early and late) of the 2001... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Hatching synchrony. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000200026 |
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| Vicente,J. Júlio; Pinto,R. Magalhães; Noronha,Dely; Carvalho,Patrícia Goulart de. |
| This report deals with the identification of one hundred and seventy-one samples of nematodes recovered from Brazilian birds collected by Lauro Travassos and his staff, between 1921-1960. Aprocta travassossi Caballero, 1938, Aprocta sp., Baruscapillaria appendiculata (Freitas, 1933) Moravec, 1982, Contracaecum plagiaticium Lent & Freitas, 1948, C. spiculigerum (Rudolphi, 1809) Railliet & Henry, 1912, Contracaecum sp., Cyrnea (C.) semilunaris (Molin, 1860) Seurat, 1914, Oxyspirura sp., Paronchocerca ibanezi (Freitas, Vicente & Pinto, 1970) Anderson &. Bain, 1976, Porrocaecum sp., Procyrnea sp., Skrjabinura spiralis Gnédina, 1933, Subulura acutissima Molin, 1860, S. bentocruzi Barreto, 1919, S. travassossi Barreto, 1919, Subulura... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nematodes; Pelecaniformes; Trogoniformes; Birds; Brazil. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000400011 |
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| Reinert,Bianca L; Pinto,Júlio C; Bornschein,Marcos R; Pichorim,Mauro; Marini,Miguel Â. |
| Five hundred and eigh body masses of 74 forest birds, and measurements of wing, tail, tarsus and beak of 14 poorly known species mist-netted at two sites in the Atlantic Forest of eastern Paraná State, southern Brazil, are presented. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Body masses; Measurements; Atlantic Forest. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000400001 |
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| Anjos,Luiz dos; Graf,Vinalto. |
| Two hundred and eighty eight bird species were registered in Santa Rita Farm, east of Paraná State in Brazil (28º18'S,49º48'W), from February 1990 to January 1991. Eighty four species were registered in all 12 months and eighty three were registered once during this period. October was the richest in number of species (220) and July was the poorest (137). The natural landscape of the Santa Rita farm is composed of open field with several patches of araucaria forest (from 10 to 40 ha) and some small areas of marshland. Two hundred and eight species occurred only in one of these habitats: 163 in the forest, 35 in the open field and 10 in the marshland. The others often occurred in both forest and open field; there is a gradient of occurrence between them.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Richness; Distribution; Paraná; Brazil. |
| Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000400013 |
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| Gabriel,Vagner de A.; Pizo,Marco A.. |
| In this paper we present data on the foraging maneuvers and substrates used to capture preys by 28 species of tyrant flycatchers (Tyrannidae) in Brazil. For six species: Arundinicola leucocephala Linnaeus, 1764, Fluvicola nengeta Linnaeus, 1766, Machetornis rixosa Vieillot, 1819, Myiozetetes similis Spix, 1825, Pitangus sulphuratus Linnaeus, 1766, and Tyrannus melancholicus Vieillot, 1819 -, we go further to investigate perch height, search time, sally distance, and sally angle. With a few exceptions, sally strike was the most frequent foraging maneuver. Living foliage and air were the most frequent substrates used to capture preys. Among the six species studied in detail we found three distinct groups of perch heights: F. nengeta and M. rixosa foraged on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Feeding behavior; Foraging maneuvers; Prey selection. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400036 |
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| Fernandes,Berenice M. M.; Menezes,Rodrigo C.; Tortelly,Rogério; Noronha,Dely; Pinto,Roberto M.. |
| The digenetic trematode Psilochasmus oxyurus (Creplin, 1835) Lühe, 1909, although with a large geographical distribution, is referred in geese (Anser anser Linnaeus, 1758) for the first time in South America, on the basis of specimens parasitizing Brazilian domestic geese, with a prevalence of 20%. Brief morphometric data on the parasites are included. Clinical signs, gross and microscopic lesions were not observed in the birds. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatidae; Anseriformes; Birds; Brazil; Digeneans; Psilostomidae. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200037 |
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| Pinto,Roberto Magalhães; Menezes,Rodrigo Caldas; Gomes,Delir Corrêa. |
| This paper deals with the first report of the nematodes Dispharynx nasuta (Rudolphi, 1819) Stiles & Hassall, 1920, Gongylonema ingluvicola Ransom, 1904, Oxyspirura mansoni (Cobbold, 1879) Ransom, 1904, Subulura brumpti (Lopez-Neyra, 1922) Cram, 1923 and Tetrameres fissipina (Diesing, 1860) Travassos, 1914, parasitizing the ring-necked pheasant, Phasianus colchicus Linnaeus, 1758 in Brazil. Morphological data on the parasites as well as on the prevalence, mean intensity, mean abundance and range of intensity of the nematodes in the infected birds are provided. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Ecology; Helminths; Morphology. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000400034 |
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| Maruch,Sandra Maria das Graças; Teles,Maria Eloiza de Oliveira; Ribeiro,Maria das Graças. |
| Known as "domestic dove", the Columba livia (Gmelin, 1789) is a columbidae species widely distributed in Brazil, whose reproductive biology has been studied by many researchers. The testes of 12 Columba livia males were collected and prepared for histologic examination under an optical microscope, the results of which were analysed and photographed. The tunica albuginea that covers the testes consists of a thick, not very cellular layer of dense connective tissue. Groups of interstitial cells with typical morphological appearance and surrounded by loose, well vascularized connective tissue are observable within the organ, between the seminiferous tubules. The seminiferous tubules are thick, intensely wound and, when seen in cross section, show Sertoli... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Columbidae; Birds; Genital apparatus; Testis. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000100015 |
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| GUILHERME,Edson; SOUZA,Izabele Rodrigues de. |
| ABSTRACT This study reports a successful reproductive event in Megascops choliba in eastern Acre, northern Brazil. An active M. choliba nest was monitored from the hatching of the eggs to the departure of the nestlings. Once hatched, the nestlings were weighed every two days to verify their weight gain over time. The nestlings remained in the nest for 30 days. The pattern of weight gain was similar to that found in other birds, presenting a rapid increase over the first 15 days, followed by a drastic reduction in the mean growth rate during the second half of the development period. Our observations indicate that the breeding season of M. choliba in southwestern Amazonia is similar as that reported for the species in the northern hemisphere. These are the... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Birds; Strigidae; Growth rate; Nest; State of Acre; Brazil. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000300269 |
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| SEDANO-CRUZ,Raúl; OSORIO,Daniel. |
| ABSTRACT Melanism in plumage color is often associated to the single nucleotide polymorphism of the melanocortin-1-receptor. Despite the striking association between the substitution of a Glutamic-acid by for a Lysine at position 92 on the MC1R protein and a completely black plumage, an in-depth understanding of the effect of missense mutations on the conformational change and behavior of the MC1R in the lipid bilayer caused by the absence of a crystal structure is lacking. We examine the structural basis for receptor activation using DNA sequences from the GenBank to perform in silico protein homology-based modeling. Our tridimensional model shows that the Alanine for a 179-Threonine substitution is a structural complement of the charge-reversing effect... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Eumelanin; E92K; Protein evolution; 3D-folding. |
| Ano: 2021 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2021000100030 |
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| ARBELÁEZ-CORTÉS,Enrique; TORRES,María Fernanda; LÓPEZ-ÁLVAREZ,Diana; PALACIO-MEJÍA,Juan Diego; MENDOZA,Ángela María; MEDINA,Claudia Alejandra. |
| Collections of frozen tissue samples stand as keystone sources of molecular information to construct biodiversity knowledge, and are particularly challenged if they focus on megadiverse countries. In 1998 the Humboldt Institute (Instituto de Investigación de Recursos Biológicos Alexander von Humboldt) began a tissue collection of Colombian biodiversity (IAvH-CT) and the aim of this work is to present a diagnostic and an historical perspective for that collection, constructed by compiling information and experiences on its management as well as by organizing and curating the information of each catalogued sample. After 16 years, the IAvH-CT harbors 16,469 samples, which represent around 2530 species from 1289 genera, and 323 families of the Colombian... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological collections; Biorepository; Birds; Cryoconservation; Neotropics; Plants. |
| Ano: 2015 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000200016 |
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| Registros recuperados: 119 | |
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