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| Registros recuperados: 119 | |
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| Niemi, Gerald; University of Minnesota; gniemi@d.umn.edu; Hanowski, JoAnn; University of Minnesota; jhanowsk@sage.nrri.umn.edu; Helle, Pekka; Finnish Game and Fisheries Research Institute; meltausrta@HELSINKI.RKTL.fi; Howe, Robert; University of Wisconsin; hower@uwgb.wi.edu; Venier, Lisa; Canadian Forest Service; lvenier@nrcan.gc.ca; Welsh, Daniel; Canadian Forest Service; dwelsh@AM.NCR.FORESTRY.CA. |
| We review characteristics of birds in boreal forests in the context of their ecological sustainability under both natural and anthropogenic disturbances. We identify the underlying ecological factors associated with boreal bird populations and their variability, review the interactions between boreal bird populations and disturbance, and describe some tools on how boreal bird populations may be conserved in the future. The boreal system has historically been an area with extensive disturbance such as fire, insect outbreaks, and wind. In addition, the boreal system is vulnerable to global climate change as well as increasing pressure on forest and water resources. Current knowledge indicates that birds play an important role in boreal forests, and... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Birds; Boreal; Conservation; Disturbance; Forests; Forestry; Natural resources; Nearctic; Palearctic; Sustainability; Trends.. |
| Ano: 1998 |
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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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| Rubin,LL; Canal,CW; Ribeiro,ALM; Kessler,A; Silva,I; Trevizan,L; Viola,T; Raber,M; Gonçalves,TA; Krás,R. |
| The present study aimed at assessing the effects of methionine and arginine on the immune response of broiler chickens submitted to immunological stimuli. Three methionine concentrations (0.31, 0.51, and 0.66% from 1 to 21 days of age; 0.29, 0.49, and 0.64% from 22 to 42 days of age) and 2 arginine concentrations (1.33 and 1.83%; 1.14 and 1.64% for the same life periods) were tested. Birds were divided into two groups for immunological stimuli (3x2x2 arrangement). Vaccines against Marek's disease, fowl pox, infectious bronchitis, Freund's Complete Adjuvant, Sheep red blood cells (SRBC), and avian tuberculin were administered to one group as immunological stimuli; the other group did not receive any stimulus. The experiment was carried out with 432... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acids; Birds; Immune system; Vaccines. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000400006 |
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| Ribeiro,AML; Vogt,LK; Canal,CW; Cardoso,MRI; Labres,RV; Streck,AF; Bessa,MC. |
| The present study aimed at evaluating the effect of the prebiotic Bio Mos™ (2 kg/ton up to 10 days; 1 kg/ton from 10 to 21 days; and 0.5 kg/ton from 21 days to slaughter), of the probiotic Lac XCL 5x™ (by spray-mixing), of a combination of the two supplements (prebiotic + probiotic), and of one growth promoter antimicrobial agent (Avilamycin at 15 ppm). Birds were orally challenged with inoculated Salmonella Enteritidis (SE) 10(6) CFU at 3 days of age. Four hundred and eighty male Ross chicks were used. The experiment lasted 28 days, and the analyses were conducted at 15 and 28 days of age. Cecum and liver bacterial colonization of production of anti-SE antibiodies, intestinal micrometry and bird performance were assessed. Neither the prebiotic, nor the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additives; Birds; Immunity; Salmonellosis. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000300009 |
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| Laufer,Juliana; Michalski,Fernanda; Peres,Carlos A.. |
| Standard line-transect census techniques were deployed to generate a checklist and quantify the abundance of medium and large-bodied vertebrate species in forest areas of eastern Amazonia with and without a history of reduced-impact logging (RIL). Three areas were allocated a total of 1,196.9 km of line-transect census effort. Sampling was conducted from April to June 2012 and from April to August 2013, and detected 29 forest vertebrate species considered in this study belonging to 15 orders, 20 families and 28 genera. Additionally, eight species were recorded outside census walks through direct and indirect observations. Of this total, six species are considered vulnerable according to IUCN (Ateles paniscus, Myrmecophaga tridactyla, Priodontes maximus,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fauna; Forest management; Tropical rainforest; Mammals; Birds. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000200202 |
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| Boscolo,Danilo; Metzger,Jean Paul; Vielliard,Jacques M.E.. |
| Playback of bird songs is a useful technique for species detection; however, this method is usually not standardized. We tested playback efficiency for five Atlantic Forest birds (White-browed Warbler Basileuterus leucoblepharus, Giant Antshrike Batara cinerea, Swallow-tailed Manakin Chiroxiphia caudata, Whiteshouldered Fire-eye Pyriglena leucoptera and Surucua Trogon Trogon surrucura) for different time of the day, season of the year and species abundance at the Morro Grande Forest Reserve (South-eastern Brazil) and at thirteen forest fragments in a nearby landscape. Vocalizations were broadcasted monthly at sunrise, noon and sunset, during one year. For B. leucoblepharus, C. caudata and T. surrucura, sunrise and noon were more efficient than sunset.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Playback; Birds; Forest fragments; Methodology development; Atlantic forest; São Paulo State. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000400003 |
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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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| Lima,D.A.; Furian,T.Q.; Pillati,R.M.; Silva,G.L.; Morgam,R.B.; Borges,K.A.; Fortes,F.B.B.; Moraes,H.L.S.; Brito,B.G.; Brito,K.C.T.; Salle,C.T.P.. |
| Salmonella Enteritidis and Salmonella Typhimurium are responsible for causing huge economic loses in aviculture, as they lead young broiler chicks to develop clinical disease and thus increase mortality. Salmonella's pathogenicity is considered complex and multifactorial, demanding more studies that could elucidate the interaction between host and pathogen. The present study aims to evaluate the virulence of 130S. Enteritidis isolates and 70S. Typhimurium inoculated in one-day-old chicks through the establishment of a pathogenicity index. For each strain, 10 commercial chicks from the Cobb lineage were used. Then, 200µL of a solution containing 2x108 CFU of S. Enteritidis or S. Typhimurium were inoculated in the birds by intraperitoneal via. Mortality and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Salmonelosis; Virulence. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000200257 |
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| Pereira,D.M.; Hernandes,F.A.; Santos,A.C.G.; Nogueira,R.M.S.. |
| ABSTRACT Feather samples were obtained from the following Psittaciformes birds: Amazona amazonica, Amazona aestiva, Aratinga jandaya, Brotogeris spp., Ara ararauna and Ara chloropterus (total of 37 individuals). These birds were housed at the Wild Animal Screening Center of Maranhão, São Luís, Brazil. Four feathers were taken from the following regions: head, back, wings, belly/breast, thighs, and tail/covert. Mites were found on 17 birds (45.94%). Astigmatid mites belonging to the genera Fainalges (Xolalgidae), Chiasmalges (Psoroptoididae) and Tanyaralichus (Pterolichidae) were identified. The highest dominance coefficient was for the mite Fainalges sp. (DC= 96.29). Chiasmalges sp. was obtained only from Ara chloropterus, and Tanyaralichus was found in A.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Acari; Captive. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000300843 |
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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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| 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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| 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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| Registros recuperados: 119 | |
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