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1.
Acta sci., Biol. sci ; 43: e57781, 2021. graf, tab
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-1461018

Resumo

This paper shows the results of a dose-response study in Scaptotrigona bipunctatabees, Lepeletier, 1836 (Hymenoptera: Apidae) exposed to the insecticide Fastac Duo. The aim was to evaluate the lethal concentration that causes the death of 50% of bees (LC50) and investigate the odd of mortality after exposure to different concentrations, using the logistic regression model under the Bayesian approach. In this approach, it is possible to incorporate a prior information and gives more accurate inferential results. Three independent dose-response experiments were analyzed, dissimilar in their lead time according to guidelines from the Organisation for Economic Co-operation and Development (OECD), in which each assay contained four replicates at the concentration levels investigated, including control. Observing exposure to the agrochemical, it was identified that the higher the concentration, the greater the odd of mortality. Regarding the estimated lethal concentrations for each experiment, the following values were found, 0.03 g a.i. L-1, for 24hours, 0.04 g a.i. L-1, for 48hoursand 0.06 g a.i. L-1for 72hours, showing that in experiments with longer exposure times there was an increase in LC50. Concluding, the study showed an alternative approach to classical methods for dose-response studies in Scaptotrigona bipunctatabees exposed to the insecticide Fastac Duo.


Assuntos
Animais , Abelhas/química , Dosagem/análise , Inseticidas , Teorema de Bayes , Mortalidade
2.
Acta Sci. Biol. Sci. ; 43: e57781, 2021. graf, tab
Artigo em Inglês | VETINDEX | ID: vti-31649

Resumo

This paper shows the results of a dose-response study in Scaptotrigona bipunctatabees, Lepeletier, 1836 (Hymenoptera: Apidae) exposed to the insecticide Fastac Duo. The aim was to evaluate the lethal concentration that causes the death of 50% of bees (LC50) and investigate the odd of mortality after exposure to different concentrations, using the logistic regression model under the Bayesian approach. In this approach, it is possible to incorporate a prior information and gives more accurate inferential results. Three independent dose-response experiments were analyzed, dissimilar in their lead time according to guidelines from the Organisation for Economic Co-operation and Development (OECD), in which each assay contained four replicates at the concentration levels investigated, including control. Observing exposure to the agrochemical, it was identified that the higher the concentration, the greater the odd of mortality. Regarding the estimated lethal concentrations for each experiment, the following values were found, 0.03 g a.i. L-1, for 24hours, 0.04 g a.i. L-1, for 48hoursand 0.06 g a.i. L-1for 72hours, showing that in experiments with longer exposure times there was an increase in LC50. Concluding, the study showed an alternative approach to classical methods for dose-response studies in Scaptotrigona bipunctatabees exposed to the insecticide Fastac Duo.(AU)


Assuntos
Animais , Abelhas/química , Dosagem/análise , Teorema de Bayes , Inseticidas , Mortalidade
3.
J. Anim. Behav. Biometeorol. ; 08(02): 131-135, Apr. 2020.
Artigo em Inglês | VETINDEX | ID: vti-31270

Resumo

The Brazilian poultry industry is undergoing a process of increasing rigor regarding production practices related to breeding and pre-slaughter operations since animal welfare is an extremely important subject that has received great attention in the developed countries. Brazil is one of the greatest producers of chicken meat, concerns have existed in the sense of adequacy to continue attending to the demand of export and maintenance of the position of leadership, in front of the other market players. One of the key points is the necessity to improve the intensive farming, which currently has many obstacles that prejudice the basic principles of animal welfare assurance. Relatively simple problems in handling animals, litter and equipment, as well as the lack of preventive maintenance in the facilities are the main ones responsible for the thermal discomfort and quality of life of these animals. Despite all the considerations raised, a large part of the Brazilian consumers is still unaware of intensive farming and the way animals are raising on the farm until their plates, being surrounded by myths and false beliefs. Therefore, the purpose of this review is to address the main critical issues affecting the welfare of broiler chickens in intensive commercial production.(AU)


Assuntos
Animais , Indústria Alimentícia/normas , Carne/análise , Carne/economia , Galinhas/crescimento & desenvolvimento
4.
J. Anim. Behav. Biometeorol. ; 08(02): 104-110, Apr. 2020. ilus
Artigo em Inglês | VETINDEX | ID: vti-31458

Resumo

The pre-slaughter operations are characterized by all the steps after the phase of raising at the farm until hanging ofbirds on the slaughter line, and this period is relatively faster than the farm phase. Nevertheless, this phase can cause acutestress in broilers, due to the direct handling of the birds at catching and by offering unknown stressful stimuli to the birdsduring transportation, lairage and hanging on the slaughter line. Other stressful factors such as handling the bird, cratingdensity, impacts on live load, distance and duration of transport between farm and slaughterhouse, and microclimaticconditions in transport and lairage affect the welfare and, consequently, the meat quality of broiler chickens. The effectsof these losses will be felt by all sectors of poultry farming. For all these factors, it is important that the poultry productionchain be aligned in the near future to meet the external and internal consumers' requirements regarding animal welfare.Therefore, the aim of this review is to address the main critical points, which affect the welfare of broilers during pre-slaughter operations in intensive production systems.(AU)


Assuntos
Animais , Abate de Animais/métodos , Abate de Animais/tendências , Galinhas/metabolismo , Indústria Alimentícia/normas , Transporte de Produtos
5.
J. Anim. Behav. Biometeorol ; 8(2): 104-110, Apr. 2020. ilus
Artigo em Inglês | VETINDEX | ID: biblio-1484306

Resumo

The pre-slaughter operations are characterized by all the steps after the phase of raising at the farm until hanging ofbirds on the slaughter line, and this period is relatively faster than the farm phase. Nevertheless, this phase can cause acutestress in broilers, due to the direct handling of the birds at catching and by offering unknown stressful stimuli to the birdsduring transportation, lairage and hanging on the slaughter line. Other stressful factors such as handling the bird, cratingdensity, impacts on live load, distance and duration of transport between farm and slaughterhouse, and microclimaticconditions in transport and lairage affect the welfare and, consequently, the meat quality of broiler chickens. The effectsof these losses will be felt by all sectors of poultry farming. For all these factors, it is important that the poultry productionchain be aligned in the near future to meet the external and internal consumers' requirements regarding animal welfare.Therefore, the aim of this review is to address the main critical points, which affect the welfare of broilers during pre-slaughter operations in intensive production systems.


Assuntos
Animais , Abate de Animais/métodos , Abate de Animais/tendências , Galinhas/metabolismo , Indústria Alimentícia/normas , Transporte de Produtos
6.
J. Anim. Behav. Biometeorol ; 8(2): 131-135, Apr. 2020.
Artigo em Inglês | VETINDEX | ID: biblio-1484308

Resumo

The Brazilian poultry industry is undergoing a process of increasing rigor regarding production practices related to breeding and pre-slaughter operations since animal welfare is an extremely important subject that has received great attention in the developed countries. Brazil is one of the greatest producers of chicken meat, concerns have existed in the sense of adequacy to continue attending to the demand of export and maintenance of the position of leadership, in front of the other market players. One of the key points is the necessity to improve the intensive farming, which currently has many obstacles that prejudice the basic principles of animal welfare assurance. Relatively simple problems in handling animals, litter and equipment, as well as the lack of preventive maintenance in the facilities are the main ones responsible for the thermal discomfort and quality of life of these animals. Despite all the considerations raised, a large part of the Brazilian consumers is still unaware of intensive farming and the way animals are raising on the farm until their plates, being surrounded by myths and false beliefs. Therefore, the purpose of this review is to address the main critical issues affecting the welfare of broiler chickens in intensive commercial production.


Assuntos
Animais , Carne/análise , Carne/economia , Galinhas/crescimento & desenvolvimento , Indústria Alimentícia/normas
7.
Braz. j. vet. res. anim. sci ; 47(4): 274-281, out.-dez. 2010. ilus, tab
Artigo em Português | VETINDEX | ID: vti-4887

Resumo

Sabe-se que durante qualquer procedimento cirúrgico na região da mandíbula no homem, um dano iatrogênico ao feixe vasculonervoso que percorre o canal mandibular (CM) poderia causar desde parestesia até dor constante. Na odontologia veterinária, diferentes procedimentos cirúrgicos são realizados no tecido ósseo adjacente ao CM, o que implica no conhecimento acurado da localização do mesmo. O objetivo desta pesquisa foi determinar por meio da Tomografia Computadorizada (TC) o trajeto do CM em relação às faces da mandíbula: lingual, vestibular, ventral e crista alveolar em dez mandíbulas de cadáveres de cães mesaticefálicos. Os tomogramas foram realizados no plano transversal, tomando como referência para cada corte o forame mandibular, as raízes dentárias dos dentes molares, pré-molares e forame mentoniano médio. No tomógrafo foram realizadas medidas desde o CM até as diferentes faces. Conclui-se que a partir do dente 3º molar, no sentido rostral, o CM aumenta gradualmente a distância em relação à crista alveolar, alcançando a sua máxima profundidade na região dente 1º molar. Em relação às faces vestibular e lingual, o CM apresentou-se lingualizado na região dos dentes molares. O CM continua rostralmente ocupando a região ventral do corpo da mandíbula, mantendo uma distância similar entre a superfície vestibular e lingual. Já na região do dente 3º pré-molar o canal mandibular aumenta ligeiramente a sua distância com relação à face ventral e lingual da mandíbula, antes do seu fim no forame mentoniano medial na face vestibular da mandíbula.(AU)


As it is known, during any surgical procedure in the human mandible, an iatrogenic damage to the neurovascular bundle that runs along the mandibular canal (MC) could cause from paresthesia to constant pain. In veterinary dentistry, different surgical procedures are performed on the bone tissue adjacent to the MC, which implies accurate knowledge of its localization. The purpose of this study was to determine by means of computerized tomography (CT) the path of the MC in relation with: lingual surface, vestibular surface, alveolar crest, and ventral mandible surface in ten mesaticephalic dogs. The slices were performed in transverse plane using as reference the mandibular foramen, the medial mental foramen and the tooth roots of molars and premolars; several measures among the MC and the mandibular faces were performed. The conclusion of this study was that from the 3rd molar tooth (following in rostral direction), the MC gradually increases its distance from the alveolar crest, reaching its maximum depth in the 1st molar tooth area. In the molar area, the MC was located nearly of the mandibular lingual surface. The CM continues rostrally occupying the ventral region of the mandible body keeping a similar distance between the buccal and lingual surface. Then in the 3rd premolar area the MC increases slightly its distance from the ventral aspect of the mandible, before its end in the medial mental foramen on the face of the mandible.(AU)


Assuntos
Animais , Cães , Mandíbula/anatomia & histologia , Tomografia/veterinária , Cães/anatomia & histologia
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