Consulta: creatorFacets:"Salgado,Douglas D'Alessandro"
Registros recuperados: 11
Data/hora: 13/06/2024 07:28:25

MORTALITY, PRODUCTION AND QUALITY OF EGGS OF DIFFERENT REARING SYSTEMS
Provedor de dados: 70
Autores: Tavares,Bartira de O.; Pereira,Danilo F.; Salgado,Douglas D'Alessandro; Mac-Lean,Priscilla A. Bustos.
ABSTRACT The conventional production of eggs in cage systems is intense and compromises the laying hens welfare. More demanding consumer markets have been pushing to abolish the use of cages and thus provide better welfare in poultry laying. This research evaluated the mortality, production, and egg quality of two alternative production systems (free-range and organic free range free-range) and compared them with the conventional system. The research was carried out in two commercial poultry farms and the variables egg weight, shell egg resistance, Haugh unit, mortality and production were recorded during eight months. The results showed that the conventional system presented better production, lower mortality and better shell egg quality. The alternative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Poultry egg farming; Alternative egg production; Quality of eggs; Animal welfare.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400478

EFFECT OF AUDITORY ENRICHMENT (MUSIC) IN PREGNANT SOWS WELFARE
Provedor de dados: 70
Autores: Silva,Flávia R. S.; Miranda,Késia O. da S.; Piedade,Sônia M. de S.; Salgado,Douglas D'Alessandro.
ABSTRACT Studies have shown that the benefits from music can improve the welfare conditions of laboratory, pet and production animals. The study aimed to evaluate the influence of music (Antonio Lucio Vivaldi compositions) on behavior aspects (position, activity, stereotypes, social and agonistic behavior) and physiological responses (respiratory rate and rectal temperature) in gestating sows in individual cages (stage 1), and collective stalls (stage 2). 28 animals were studied, 14 belonged to music group, and 14 to the control group (without music).The respiratory rate had the lowest averages in the group with music, for example, in stage 1, time 1, values of 19.28 and 21.50 mov.min−1. In stage 2, the values found in the same time were 20.36 and 24.16,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal behavior; Physiological parameters; Sound stimuli stereotypes.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200215

DIFFERENT GENDER DIVISION PATTERNS FOR SWINE HOUSING IN WEAN-TO-FINISH SYSTEM
Provedor de dados: 70
Autores: Massari,Juliana M.; Vercellino,Rimena do A.; Curi,Thayla M. R. de C.; Moura,Daniella J. de; Medeiros,Brenda B. L.; Salgado,Douglas D'Alessandro.
ABSTRACT This study aimed at identifying the best gender division pattern for swine at nursery stage, through the evaluation of behavioral and environmental parameters. Three treatments were established to achieve our objective: single-sex housing of 26 surgically castrated male pigs; mixed-sex housing of 13 castrated males and 13 females; and single-sex housing of 26 females. Environmental and behavioral data have been recorded. It was used an ethogram to make an inventory of behaviors and that was used in multivariate analysis. Bite addiction differed statistically among treatments, and the lowest occurrence was in mixed-sex housing. Results of the multivariate analysis suggested that regardless of the treatment chosen, relative humidity is positively...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Multivariate analysis; Welfare; Behavior; Facilities.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100013

The impact of evaporative cooling on the thermoregulation and sensible heat loss of sows during farrowing
Provedor de dados: 70
Autores: Justino,Eliene; Nääs,Irenilza de A.; Carvalho,Thayla M. R.; Neves,Diego P.; Salgado,Douglas D'Alessandro.
Pigs are more sensitive to high environmental temperatures explained by the inability of sweating and panting properly when compared to other species of farmed livestock. The evaporative cooling system might favor the thermal comfort of animals during exposure to extreme environmental heat and reduce the harmful effects of heat stress. The purpose of this study was to assess the sensible heat loss and thermoregulation parameters from lactating sows during summer submitted to two different acclimatization systems: natural and evaporative cooling. The experiment was carried out in a commercial farm with 72 lactating sows. The ambient variables (temperature, relative humidity and air velocity) and sows physiological parameters (rectal temperature, surface...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Ventilation; Thermal stress; Panting; Surface temperature; Swine; Lactation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000600003

Ambiência aérea em maternidade e creche de suínos
Provedor de dados: 70
Autores: Silveira,Neidimila A.; Nääs,Irenilza de A.; Moura,Daniella J. de; Salgado,Douglas D'Alessandro.
A suinocultura brasileira é uma atividade importante para o agronegócio do País. Embora o uso de tecnologia nos vários segmentos dessa atividade envolva a substituição do trabalho humano pela automatização de tarefas, o uso da mão de obra humana ainda é significativo. O trabalhador no setor suinícola está exposto a uma série de fatores de risco na execução de suas atividades, dentre os quais a exposição a gases nocivos. O presente trabalho teve por objetivo avaliar a qualidade do ar em instalações de maternidade e creche suinícolas, em duas granjas, com diferentes características (G1 e G2). Para tanto, foram avaliadas concentração de gases (NH3, CO2 e CO) e poeira respirável durante o período de atividades dos trabalhadores. As concentrações dos gases...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Suinocultura; Ambiente aéreo; Trabalhador.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162009000300002

TECHNICAL FEASIBILITY OF THE ACCLIMATIZATION SYSTEM IN AVIARY OF POSTURE: A CASE STUDY
Provedor de dados: 70
Autores: Pereira,Danilo F.; Kodaira,Vanessa; Bueno,Leda G. de F.; Soares,Nilce M.; Salgado,Douglas D'Alessandro.
ABSTRACT: The objective of this study was to compare the performance of laying hens between automated aviaries, one with and another without acclimatized system. On a daily basis it was registered in each aviary the mortality, the egg production, and the feed consumption. The variables of the dry bulb temperature, relative humidity and black globe temperature were registered every 30 minutes using the thermos hygrometer. Every 28 days ninety eggs from each aviary were collected randomly and the variables egg weight, shell weight, shell thickness and Haugh Unit were registered. The consumption and quality of the electrical energy supply were monitored every 30 minutes using registers of electrical magnitude. The results showed that the acclimatization...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ambience; Electrical energy; Mortality; Egg production; Precision animal science.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500855

Mortality prediction of laying hens due to heat waves
Provedor de dados: 124
Autores: Riquena,Rodrigo da Silva; Pereira,Danilo Florentino; Vale,Marcos Martinez do; Salgado,Douglas D'Alessandro.
ABSTRACT Mortality in the production of laying hens is a concern for producers and constitutes a considerable economic loss. Some climatic events, such as heat waves, are directly related to the mortality increasing. The aim of this study was to relate the occurrence of heat waves with laying hens mortality, considering the effect of two different kinds of shed used in egg production. Daily mortality data were obtained from two aviaries located in the city of Bastos-SP for the period of October 2014 to January 2016. The data about the climate were gotten from two meteorological stations located in the cities of Tupã-SP and Rancharia-SP, Brazil, from 2010 to 2015. The heat waves were classified in the climatic database using different definitions...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Data mining; Poultry farming; Climate changes; Animal husbandry.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100018

Environmental conditions in broiler multi-stage setter: a case study
Provedor de dados: 63
Autores: Gigli,Ana Carolina de Souza; Baracho,Marta dos Santos; Nääs,Irenilza de Alencar; Salgado,Douglas D'Alessandro; Alvarenga,Débora Passos.
Production of one day-old chick production is one of the most important segments in the poultry production business. Broiler chicken incubation environment needs to be homogeneous and adequate so hatchability and final product quality are not affected. This research aimed at evaluating environmental conditions inside a multi-stage setter in a commercial hatchery house. The incubator was split into six areas and data loggers placed in the geometric center to register temperature and relative humidity data; carbon dioxide concentration and number of colony forming units (CFU) of fungi were also sampled and analyzed; Kruskal-Wallis non-parametric test was used for statistical analysis; significant differences in temperature and relative humidity distribution...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Poultry; Incubation; Environment.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200001

Broiler mortality and human behavior at work
Provedor de dados: 63
Autores: Alencar,Maria do Carmo Baracho de; Nääs,Irenilza de Alencar; Salgado,Douglas D'Alessandro; Gontijo,Leila Amaral.
Brazilian broiler industry adds a significant contribution to country's exports, employing around five million workers in the production chain. The human work involves multiple aspects, including values, beliefs related to work, cultural aspects, personality, motivation etc. The aim of this research was to analyze the associations between broiler accumulated mortality and workers' beliefs related to work, and influences of the supervisors. The study took place in the state of Paraná, Brazil involving 80 broiler integrate farms and 60 workers. A pre-elaborated questionnaire was applied to the workers containing questions related to their health and to some beliefs related to work, as an interview where they could express their feelings. The normal tasks...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler production; Ergonomics; Human work.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600003

Impact of global warming on beef cattle production cost in Brazil
Provedor de dados: 63
Autores: Nääs,Irenilza de Alencar; Romanini,Carlos Eduardo Bites; Salgado,Douglas D'Alessandro; Lima,Karla Andrea Oliveira; Vale,Marcos Martinez do; Labigalini,Marcelo Ricardo; Souza,Silvia Regina Lucas de; Menezes,Adriana Gomes; Moura,Daniella Jorge de.
Global warming is affecting agribusiness in its economic aspects. Therefore, the prediction of the evolution of Brazilian beef cattle production cost was made using the IPCC forecast scenario for global warming. The methodology consisted of two steps: (i) the development of a fuzzy model that estimated the grazing land capacity (RP) decrease risk as a function of the changes in the average total rain index, air temperature and increase in extension of the dry season; and (ii) the design of an algorithm for predicting the decrease in production as function of the RPfuzzy model, that results in the impact in beef cattle productivity, and consequent increase in production costs. Historical environmental data from important producing counties in the Cerrado...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry season; Environmental temperature; Fuzzy simulation; Mathematical modeling.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100001

Efeito das temperaturas de bulbo seco e de globo negro e do índice de temperatura e umidade, em vacas em produção alojadas em sistema de free-stall
Provedor de dados: 62
Autores: Marcheto,Francine Galhiardo; Nääs,Irenilza de Alencar; Salgado,Douglas D'Alessandro; Souza,Silvia Regina Lucas de.
O resultado da exposição de vacas em produção em ambiente adequado, pode ter reflexo na produtividade leiteira, por permitir o uso correto de equipamentos reduzindo o estresse térmico nos animais, e consequentemente, melhorando a produtividade. No presente trabalho avaliou-se o efeito das temperaturas de bulbo seco e de globo negro, na produção de vacas leiteiras alojadas em sistema de freestall, utilizando-se dois grupos de vacas: mais produtivas, com produção acima de 29 kg/dia e menos produtivas, com produção média abaixo de 14 kgdia-1. Os resultados mostraram os efeitos das variáveis ambientais e do índice de temperatura e umidade regional, no declínio da produção de leite. Não houve correlação significativa entre os valores do índice e o declínio na...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conforto Térmico; Produção Leiteira; Temperatura Ambiente; Ambiência Animal.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962002000600008