Consulta: creatorFacets:"Salgado,DD"
Registros recuperados: 8
Data/hora: 13/06/2024 10:41:09

Estimating the impact of environmental conditions on hatching results using multivariable analysis
Provedor de dados: 89
Autores: Nääs,IA; Gigli,ACS; Baracho,MS; Almeida Paz,ICL; Salgado,DD.
Hatching results are directly related to environmental and biological surroundings. This research study aimed at evaluating the influence of incubation environmental conditions on hatchability and one-day-old chickling quality of five production flocks using multivariable analysis tool. The experiment was carried out in a commercial hatchery located in the state of São Paulo, Brazil. Environmental variables such as dry bulb temperature, relative humidity, carbon dioxide concentration, and number of colony forming units of fungi were recorded inside a broiler multi-stage setter, a hatcher after eggs transference, and a chick-processing room. The homogeneity of parameter distribution among quadrants inside the setter, the hatcher, and the chick room was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler chick; Chick quality; Hatchability; Hatchery; Incubation conditions.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000400004

Broiler breeder behavior and egg production as function of environmental temperature
Provedor de dados: 89
Autores: Pereira,DF; Nääs,IA; Romanini,CEB; Salgado,DD; Pereira,GOT.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler breeder; Heat stress; Behavioral pattern.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100002

Influence of a Commercial Hatchery Thermal Environmental on the Heat Loss of Fertile Broiler Eggs
Provedor de dados: 89
Autores: Silva,GF; Pereira,DF; Salgado,DD.
ABSTRACT The objectives of this study were to monitor the thermal environment of different hatchery locations during the transfer of fertile eggs from the setter and to the hatcher, to measure egg heat loss, and to determine its effects on hatchery results. In total, 1,728 fertile eggs of Cobb broiler breeders were divided into two treatments. In treatment 1 (T1), after 19 days of incubation, eggs were removed from the incubator and transferred to the hatcher in aninsulated box, and in treatment 0 (T0), eggs were transferred with no thermal insulation (T0). The duration of egg transfer was 10 minutes. Eggs were photographed using a thermographic camera at the exit of the setter, arrival at and exit from the candling room, and arrival at the hatcher. Based...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Thermographic image; Thermal insulation; Egg transfer.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000600033

Climate Change in Layer Poultry Farming: Impact of Heat Waves in Region of Bastos, Brazil
Provedor de dados: 89
Autores: Lamarca,DSF; Pereira,DF; Magalhães,MM; Salgado,DD.
ABSTRACT The region around the municipality of Bastos, state of São Paulo, accounted for about 7% of Brazilian egg production in 2015. In 2012, it experienced a heat wave that resulted in the death of approximately 500,000 hens, according to information released at the time. Considering the impact of heat waves on layer mortality, the objective of this study was to analyze how heat waves impact the layer farming in the region of Bastos, considering the climate change scenarios forecasted by the IPCC for the next years. This study was conducted in three stages: i) analysis of the IPCC reports to understand climate change scenarios; ii) analysis of historical temperature data in the region of Bastos; iii) analysis of how climate change, through heat waves,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Extreme event; IPCC; Laying hens; Mortality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400657

Estimating mortality in laying hens as the environmental temperature increases
Provedor de dados: 89
Autores: Pereira,DF; do Vale,MM; Zevolli,BR; Salgado,DD.
Layer mortality due to heat stress is an important economic loss for the producer. The aim of this study was to determine the mortality pattern of layers reared in the region of Bastos, SP, Brazil, according to external environment and bird age. Data mining technique were used based on monthly mortality records of hens in production, 135 poultry houses, from January 2004 to August 2008. The external environment was characterized according maximum and minimum temperatures, obtained monthly at the meteorological station CATI in the city of Tupã, SP, Brazil. Mortality was classified as normal (£ 1.2%) or high (&gt; 1.2%), considering the mortality limits mentioned in literature. Data mining technique produced a decision tree with nine levels and 23 leaves,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Data mining; Layer production; Mortality; Thermal comfort.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400008

Field evaluation of broiler gait score using different sampling methods
Provedor de dados: 89
Autores: Cordeiro,AFS; Nääs,IA; Salgado,DD.
Brazil is today the world's largest broiler meat exporter; however, in order to keep this position, it must comply with welfare regulations while maintaining low production costs. Locomotion problems restrain bird movements, limiting their access to drinking and feeding equipment, and therefore their survival and productivity. The objective of this study was to evaluate locomotion deficiency in broiler chickens reared under stressful temperature conditions using three different sampling methods of birds from three different ages. The experiment consisted in determining the gait score of 28, 35, 42 and 49-day-old broilers using three different known gait scoring methods: M1, birds were randomly selected, enclosed in a circle, and then stimulated to walk out...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Environmental rearing conditions; Locomotion deficiency.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000300002

Use of vitamin D to reduce lameness in broilers reared in harsh environments
Provedor de dados: 89
Autores: Nääs,I de A; Baracho,M dos S; Bueno,LGF; Moura,DJ de; Vercelino,R do A; Salgado,DD.
In tropical poultry-producing countries, poultry houses usually have little environmental control. This study investigated the effect of dietary vitamin D on the incidence of leg abnormalities of a fast-growing broiler strain reared under harsh conditions. In this study, 300 one-day-old male broilers were distributed in two treatments with three replicates of 50 birds each. One group was fed a placebo and the other group was fed 25-hydroxycholecalciferol (25-OH-D3) in a soluble form. The environmental variables were weekly recorded during until birds were 49 days old. Birds were weekly gait scored, and their walking speed and vertical force while walking were assessed. Post-mortem examination was performed and skeletal lesions were assessed. Control birds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feet force measurement; Leg abnormalities; Vitamin D supplement.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000300002

Risk of Incidence of Hock Burn and Pododermatitis in Broilers Reared under Commercial Conditions
Provedor de dados: 89
Autores: Jacob,FG; Baracho,MS; Nääs,IA; Lima,NSD; Salgado,DD; Souza,R.
ABSTRACT The most common lesions observed in commercial broiler farms are hock burns and pododermatitis, defined as necrotic lesions on the plantar surface of the footpads and in the hock of growing broilers, causing pain and compromising broiler welfare. The present study aimed at identifying the risks of hock burns and pododermatitis in broilers reared under commercial conditions on new or reused litter. Twenty-four 40-d-old broilers reared in two houses in a commercial broiler farm. The plantar surface of the footpads and the hocks of broiler were recorded using infrared thermal images. The incidence of hock burns in broilers reared on new litter was 0.72 times lower than those on reused litter. Broilers reared on new litter presented lower risk (0.75,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feet lesion; Litter; Poultry production.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300357