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| Registros recuperados: 119 | |
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| Zima,Paulo V.Q.; Francisco,Mercival R.. |
| ABSTRACT Several behavioral aspects of the Red-crested Finch Coryphospingus cucullatus (Statius Müller, 1776) are poorly studied. Here we provide reproductive information on 16 active nests. This information may be valuable to elucidate the phylogenetic relationships of this bird, and to design plans to manage it. Nesting activities occurred from October to February. Clutches consisted of two to three eggs (2.06 ± 0.25), which were laid on consecutive days. Incubation usually started the morning the females laid their last egg and lasted 11.27 ± 0.47 days. Hatching was synchronous, or happened at a one-day interval. The nestling stage lasted 12 ± 0.89 days. Only females incubated the eggs and they fed the young more often than the males did. Overall... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Breeding biology; Nesting; Tachyphoninae. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000400300 |
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| Mallet-Rodrigues,Francisco; Parrini,Ricardo; Pimentel,Leonardo M. S.; Bessa,Rafael. |
| We studied the altitudinal distribution of 426 bird species in the Serra dos Órgãos, a mountainous region in southeastern Brazil. Thirty-four localities were visited between 1991 and 2009. Our study revealed a decline in bird species richness with elevation, although a smaller number of species was recorded at lower altitudes (below 300 m) possibly due to local extinctions caused by the intense human occupation of the region. A less diverse avifauna was found above 2,000 m, with only one species (Caprimulgus longirostris) recorded exclusively in this altitudinal range. Most endemic species were found between 300 and 1,200 m, but the endemism was more significant at higher altitudes. Nearly half of the birds found above 1,400 m were endemic species. Most of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Avifauna; Birds; Elevational distribution. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000400003 |
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| Perrella,Daniel F.; Davanço,Paulo V.; Oliveira,Leonardo S.; Sousa,Livia M.S.; Francisco,Mercival R.. |
| ABSTRACT Despite the fact that E. chlorotica (Linnaeus, 1766) is common and widely distributed in South America, the reproductive aspects of the species are poorly documented. Here we present data on 18 active nests found from August to February, between 2007 and 2012. Nests were globular with a lateral entrance, and measured 97.9 ± 14.4 mm in outside height, 110.6 ± 11.6 mm in outside diameter, and were 4.88 ± 2.09 m above ground. They were often supported from bellow and were composed mainly of tiny dry leafs and leaflets, fine petioles, and plumed seeds, all compacted with spider web silk. Eggs were laid on consecutive days or with one day interval, and clutch size varied from 1-3 eggs (2.1 ± 0.6, n = 9 nests). Only females incubated the eggs, but both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Breeding biology; Nesting behavior; Euphoniinae; Wasps. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100321 |
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| Rocha,Tatiane Martins; Andrade,Maria Auxiliadora; Souza,Eliete Silva e; Stringhini,José Henrique; Café,Marcos Barcellos; Rezende,Cíntia Silva Minafra e; Pôrto,Regiani Nascimento Gagno. |
| An experiment with 630 one-day-old chicks experimentally inoculated with Salmonella Typhimurium was performed to evaluate the effects of an organic acid blend (benzoic, fumaric and 2-hydroxi-4-methylltio-butanoic - HMTBa) on intestinal health and performance. The experimental challenge with Salmonella Typhimurium occurred in two different routes of administration: via crop on the first day after hatching, and via feed, offered from seven to 14 days of age. These groups were treated with organic acids in a 3 × 2 (agent versus acid) factorial arrangement. Chicks treated with organic acids had higher weight gain, mean live weight and better feed conversion at 14 days of age, and higher weight gain at 28 days of age. Chicks treated with organic acids... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Contamination; Control feed; Conversion; Salmonellosis. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200023 |
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| Calderano,Arele Arlindo; Gomes,Paulo Cezar; Donzele,Juarez Lopes; Barreto,Sergio Luiz de Toledo; Vellasco,Cássia Rampini; Mello,Heloisa Helena de Carvalho; Lelis,Guilherme Rodrigues; Rocha,Tatiana Cristina da. |
| The objective of this study was to determine the ideal digestible tryptophan:digestible lysine ratio in diets for laying hens from 24 to 40 weeks of age. Two hundred and forty Hy-Line W-36 laying hens at 24 weeks of age were distributed in a completely randomized design, with five treatments, eight replicates and six birds per experimental unit. The digestible tryptophan levels in the experimental diets were 1.57; 1.68; 1.79; 1.90 and 2.01 g/kg, providing ratios of digestible tryptophan:digestible lysine of 0.215; 0.230; 0.245; 0.260 and 0.275. The increase in the levels of digestible tryptophan in the diet linearly improved the feed intake, digestible tryptophan intake, digestible lysine intake, egg production, egg mass, feed conversion per egg mass and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acid; Birds; Ideal protein. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000006 |
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| Pastore,Silvana Marques; Gomes,Paulo Cezar; Rostagno,Horacio Santiago; Albino,Luiz Fernando Teixeira; Calderano,Arele Arlindo; Vellasco,Cássia Rampini; Viana,Gabriel da Silva; Almeida,Rodrigo Lopes de. |
| The experiment was conducted to determine the nutritional requirement of calcium and the best calcium:available phosphorus ratio for commercial layers at the post-laying peak. A total of 324 Hy-Line W-36 laying hens were utilized in the period from 42 to 58 weeks of age, distributed in a completely randomized design in a 3 × 3 factorial arrangement, composed of three levels of calcium (39, 42 and 45 g/kg) and three calcium:phosphorus ratios (12.12:1; 10.53:1; and 9.30:1), totaling nine treatments with six replications and six birds per experimental unit. There was no significant effect from the calcium levels × calcium:phosphorus ratio interaction for any of the variables studied. The calcium levels and the calcium:phosphorus ratios did not affect the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Mineral; Performance; Requirement. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001200007 |
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| Pomar,Candido; Kipper,Marcos; Marcoux,Marcel. |
| ABSTRACT Precise body composition measurements are essential in animal nutrition studies because the impact of treatments is evaluated based on changes in body weight and composition. Various indirect techniques for animal compositional evaluation have been developed and evaluated for applicability in animal nutrition studies. A fast, accurate, minimally invasive method that requires little input is considered the ideal for providing information about the animal. Measurements obtained by dual-energy x-ray absorptiometry (DXA) are highly correlated with those obtained by chemical analysis and dissection. The algorithms of DXA software partition the six chemical components of the body (lipids, water, proteins, carbohydrates, non-bone mineral, and bone... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative method; Birds; Body composition; DXA; Pig. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000700621 |
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| Santos,Ana Carolina Ferreira dos; Ludke,Maria do Carmo Mohaupt Marques; Ludke,Jorge Vitor; Santos,Jussiede Silva; Viapiana,Juliane Garlet; Rabello,Carlos Bôa-Viagem; Torres,Thaysa Rodrigues; Custódio,Lidiane Rosa. |
| ABSTRACT The objective of this study was to determine the energy value of pasta waste through a metabolism trial and determine the best level of its inclusion in broiler diets. In the metabolism trial, sixty 14-day-old birds were assigned to two treatments (control diet and a diet in which 30% was replaced by the byproduct) with six replicates and five birds per experimental unit. In the performance trial, 525 one-day-old chicks were assigned to treatments consisting of five levels of pasta waste (0, 100, 200, 300, and 400 g kg−1) in the diet, with seven replicates and 15 birds per experimental unit, in a completely randomized design. The phases of up to 7, 21, 35, and 42 days of age were evaluated. At the end, two broilers with average weight were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Gross margin; Pasta byproducts; Prime cuts; Weight gain. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100541 |
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| KARASOV,WILLIAM H.; MEYER,MICHAEL W.. |
| Environmental contaminants are ubiquitous and so are often key suspects in cases of lagging wildlife populations. How do we test hypotheses about cause-effect linkages between contaminants and wildlife health? We present three case studies in which different approaches were used to test hypotheses about effects of contaminants on wildlife. The cases involve the possible impacts of (1) polychlorinated biphenyl on Lake Superior bald eagles (Haliaeetus leucocephalus); (2) dioxin on osprey (Pandion halieatus); and (3) methyl mercury on common loons (Gavia immer). The different approaches were dictated by legal, logistic, and financial limitations, but the relative strengths of experimental and mechanistic approaches over correlative approaches is underscored.... |
| Tipo: Journal article |
Palavras-chave: Applied physiological ecology; Ecotoxicology; Birds; Chemical contaminants. |
| Ano: 2000 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300009 |
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| KELT,DOUGLAS A.. |
| Four recent studies on Chilean vertebrates underscore the very different effects that habitat fragmentation may have under different conditions. In southern Chile, birds exhibited significant species-area relationships, whereas the more depauperate small mammal community did not. The avifauna of highly isolated rainforest remnants in Fray Jorge National Park (IV Región) presented steeper species-area relations than those in southern Chile, reminiscent of land-bridge islands after faunal relaxation. The small mammal results were unexpected but may reflect the reduced vagility and immigration potential of this group. Additionally, the inter-remnant matrix habitat may support large populations of only some species, allowing them to capitalize on resources... |
| Tipo: Journal article |
Palavras-chave: Habitat fragmentation; Valdivian temperate rainforest; Small mammals; Birds; Conservation. |
| Ano: 2001 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000400005 |
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| GUTIÉRREZ,JULIO R; MESERVE,PETER L; KELT,DOUGLAS A; ENGILIS JR,ANDREW; PREVITALI,M. ANDREA; MILSTEAD,W. BRYAN; JAKSIC,FABIAN M. |
| Since 1989, we have conducted a large-scale ecological experiment in semiarid thorn scrub of a national park in north-central Chile. Initially, we focused on the role of biotic interactions including predation, interspecific competition, and herbivory in small mammal and plant components of the community. We utilized a reductionist approach with replicated 0.56 ha fenced grids that selectively excluded vertebrate predators and/or larger small mammal herbivores such as the degu, Octodon degus. Although we detected small transitory effects of predator exclusions on degu survival and numbers, other species failed to show responses. Similarly, interspecific competition (i.e., degus with other small mammals) had no detectable numerical effects (although some... |
| Tipo: Journal article |
Palavras-chave: Birds; Chilean desert; Ephemeral plants; LTER; Small mammals. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000100005 |
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| WOLF,BLAIR. |
| Avian adjustments to desert environments are characterized by an integration of behavior and physiology. These responses serve to maintain homeostasis and conserve vital resources such as water. The small size of birds confers a close coupling to the thermal environment and demands rapid adjustments to environmental challenges. Physiological responses to heat stress include hyperthermia, and increased evaporative cooling as environmental temperatures approach body temperature. Behaviorally, desert birds respond to heat stress by drastically reducing activity during the hottest parts of the day and selecting cool shaded microsites. This characteristic behavioral response presents a potential problem in the face of global warming. If birds totally forgo... |
| Tipo: Journal article |
Palavras-chave: Global warming; Hot deserts; Birds; Water balance; Evaporative water loss; Avian distribution. |
| Ano: 2000 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000300003 |
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| Cintra,Renato; Cancelli,Jessica. |
| Recently, a significant number of studies on neotropical forest bird communities have focused on factors influencing their richness, abundance, and habitat selection. However, few of them have considered populations or individual species, and how habitat structure affects their distribution and abundance. In this study, we investigated how the combined effects of some forest structure components affect the occurrence and abundance of a resident bird species, the scale-backed antbird Hylophylax poecilinotus (Cabanis, 1847). We tested the null hypothesis of no difference between the variation in forest structure components at locations where birds occurred and at locations where they did not. In a pristine Terra Firme forest at the Ducke Reserve, Manaus, we... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Micro-habitat structure; Terra Firme Forest. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000400008 |
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| Ribeiro,Maria das Graças; Teles,Maria Eloiza de Oliveira; Maruch,Sandra Maria das Graças. |
| The study of the female genital system of Columba livia (Gmelin, 1789) is part of the research on the reproductive biology of Brazilian birds. This work describes the morphological aspects of the ovary of Columba livia, as well as the histological differences observed in the ovarian follicles during the ovocyte maturation process. Ten Columba livia females were studied, whose ovaries had been dissected, fixed in Bouin and Helly solutions, and histologically processed for staining (Hematoxylin-Eosin; Gomori's trichromic and Weigert's technique and Gomori's technique for connective tissue fibers). The ovary has an irregular surface, is located in the abdominal cavity, and relates to the cranial portion of the left kidney and caudal extremity of the left... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Columbidae; Birds; Genital apparatus; Ovary. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000100016 |
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| Pinto,Roberto Magalhães; Noronha,Dely. |
| Data on nematodes of the genus Pelecitus Railliet & Henry, 1910, namely P. fulicaeatrae (Diesing, 1851) López-Neyra, 1956, P. anhingae Vuylsteke, 1957, P. tubercauda Vanderburgh, Anderson & Stock, 1984, P. vuylstekae (Molin, 1860) Bartlett & Greiner, 1986, P. tercostatus (Molin, 1860) Railliet & Henry, 1910, P. helicinus (Molin, 1860) Railliet & Henry, 1910, P. circularis (Molin, 1860) Railliet & Henry, 1910 and Pelecitus sp., are presented, with basis on 29 nematode samples recovered from Brazilian birds representing 13 families and 19 species that were captured between 1934-1951 in the southeastern and central regions; parasites were formerly deposited as unidentified material in the Helminthological... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazil; Birds; Nematodes; Pelecitus. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200029 |
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| Graciolli,Gustavo; Carvalho,Claudio José Barros de. |
| A survey of the louse flies species (Diptera, Hippoboscidae) in the State of Paraná, Brazil was carried out. Keys to eight genera and 15 species found are given. The following species are recorded for the first time in Paraná: Lipoptena (Lipoptenella) guimaraesi Bequaert, 1957; Stipolmetopoda legtersi Bequaert, 1955; Icosta (Ornithopomus) latifacies Bequaert, 1955; Icosta (Ornithpomus) rufiventris (Bigot, 1885); Icosta (Ardmoeca) albipennis (Say, 1823) and Olfersia bisulcata Macquart, 1847. Baryphthengus ruficapillus (Vieillot, 1818) (Momotidae) and Ciccaba virgata Carbin, 1849 (Strigidae) are new host records for Ornithoica vicina (Walker, 1849) and I. (Ardmoeca) albipennis; Chiroxiphia caudata (Shaw, 1793) and Schiffornis virescens (Lafresnaye, 1838)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artiodactyla; Birds; Host-parasite relationship; Louse flies; Taxonomy. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000400019 |
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| Registros recuperados: 119 | |
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