995 resultados para Comercial laying hens


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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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O objetivo desta análise é mostrar como os dois maiores diários da capital paulista – Folha de S.Paulo (FSP) e O Estado de S. Paulo (OESP) representaram em suas páginas o acidente com o Airbus 707-300 da TAM ocorrido no dia 17 de julho de 2007, fazendo 199 vítimas fatais e tornando-se a maior tragédia da aviação comercial na América Latina. O ensaio sobre a representação da tragédia de Congonhas nos jornais FSP e OESP questiona as grandezas e limitações da mídia na cobertura de assuntos complexos e procura avaliar o papel dos leitores/consumidores na orientação das pautas.

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O melhoramento genético de abelhas Apis mellifera é uma ferramenta essencial e de caráter obrigatório para o sucesso e desenvolvimento da indústria apícola. Práticas de manejo, troca das rainhas e inseminação instrumental constituem os pilares fundamentais de um programa que vise o aumento de determinada característica quantitativamente. A diversidade de climas no Brasil, junto com a possibilidade de direcionar a produção de diferentes produtos, fazem deste um país com oportunidades no campo internacional da apicultura. Programas de melhoramento genético, em grande escala, precisam ser feitos a partir de populações em massa, ou seja, um programa de melhoramento deverá iniciar-se a partir de um grande número de colmeias para serem selecionadas, com a finalidade de desenvolver e estruturar um programa de melhoramento genético que tenha como objetivo incrementar os níveis de produção e assim aumentar as médias de produção por colmeia em geral. Algumas características podem ser utilizadas para selecionar as colmeias, como: produção de própolis; a qualidade da própolis coletada; comportamento higiênico; taxa de infestação de varroa e incidência de Nosema. Isso garante a seleção das melhores colmeias como base do programa de melhoramento genético. Adicionalmente, padronização de práticas de manejo, troca constante de rainhas, produção de zangões, avaliação contínua da produção e a inseminação instrumental são práticas constantes nos apiários do programa de melhoramento em própolis.

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Abstract.- This study assessed the effects of human influences over the abundance and size patterns of five species of gastropods (top-shell snails and limpets) commonly collected in the Canarian Archipelago: ‘burgado hembra’ (Osilinus atrata), ‘burgado macho’ (Osilinus sauciatus), ‘lapa blanca’ (Patella aspera), ‘lapa negra’ (Patella candei crenata) and ‘lapa de sol’ (Patella rustica). We studied patterns of abundance and size of these species across three islands (Lanzarote, La Graciosa and Alegranza) corresponding to three levels of human influence: high, medium and low, respectively; which were quantified through three indicators: human pressure (inhabitants km-1 d-1), accessibility to the coast (km of sealed and unsealed roads), and volumes of capture (kg). The abundances of O. atrata and P. aspera were statistically higher at Alegranza than at La Graciosa and Lanzarote, whereas the density was 10 to 15 times larger at Alegranza for four of the five studied species. Significant differences in the size structure of the species among islands (= levels of human influence) were also observed. Not only all large-sized individuals disappeared at Lanzarote and La Graciosa, yet there was a decrease in numbers for the majority of size ranges. Thought populations of top-shell snails and limpets were affected by natural variability, human activities turned out to be the major driver for the observed differences among islands. These results seriously question the effectiveness of the current shellfish regulations contained in the Regional Fish Law. Resumen.- Este estudio determinó los efectos de la influencia humana sobre la abundancia y la estructura de talla de cinco especies de moluscos gasterópodos comúnmente recolectados en el Archipiélago Canario: el ‘burgado hembra’ (Osilinus atrata), el ‘burgado macho’ (Osilinus sauciatus), la ‘lapa blanca’ (Patella aspera), la ‘lapa negra’ (Patella candei crenata) y la ‘lapa de sol’ (Patella rustica). Se analizaron tres islas (Lanzarote, La Graciosa y Alegranza) correspondientes a tres categorías de influencia humana: alta, media y baja, respectivamente; cuantificadas a través de tres indicadores: la presión humana (hab km-1 d-1), la accesibilidad a la costa (km de red viaria) y los volúmenes de extracción de los recursos (kg). La abundancia de O. atrata y P. aspera fue estadísticamente mayor en Alegranza que en La Graciosa y Lanzarote, mientras que los valores de densidad fueron de 10 a 15 veces superiores en Alegranza para cuatro de las cinco especies estudiadas. Para la estructura de talla, se detectaron notables diferencias entre islas (= niveles de influencia humana). En Lanzarote y La Graciosa no sólo desaparecieron los ejemplares de mayor talla, sino que disminuyeron los ejemplares para la mayoría de rangos de talla. A pesar que la variabilidad natural de las poblaciones de burgados y lapas es alta, la actividad humana parece ser la causa principal de las diferencias observadas entre islas. Estos resultados cuestionan seriamente la efectividad de las normas sobre marisqueo de la actual Ley de Pesca de Canarias.

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Fecha de publicación aproximada

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[ES] El objeto de este trabajo es articular el proceso a seguir y determinar los factores que permiten medir el potencial empresarial de un individuo, una organización o un entorno concreto. La aplicación de la metodología propuesta se desarrolla en la Zona Comercial Triana.

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Universidad de Las Palmas de Gran Canaria. Facultad de Ciencias del Mar. Trabajo Fin de Título para la obtención del Graduado en Ciencias del Mar ; 2013-2014

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Programa de Gestión en la Nueva Economía

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The PhD project was focused on the study of the poultry welfare conditions and improvements. The project work was divided into 3 main research activities. A) Field evaluation of chicken meat rearing conditions kept in intensive farms. Considering the lack of published reports concerning the overall Italian rearing conditions of broiler chickens, a survey was carried out to assess the welfare conditions of broiler reared in the most important poultry companies in Italy to verify if they are in accordance with the advices given in the European proposal COM (2005) 221 final. Chicken farm conditions, carcass lesions and meat quality were investigated. 1. The densities currently used in Italy are in accordance with the European proposal COM 221 final (2005) which suggests to keep broilers at a density lower than 30-32 kg live weight/m2 and to not exceed 38-40 kg live weight/m2. 2. The mortality rates in summer and winter agree with the mortality score calculated following the formula reported in the EU Proposal COM 221 final (2005). 3. The incidence of damaged carcasses was very low and did not seem related to the stocking density. 4. The FPD scores were generally above the maximum limit advised by the EU proposal COM 221 final (2005), although the stocking densities were lower than 30-32 kg live weight per m2. 5. It can be stated that the control of the environmental conditions, particularly litter quality, appears a key issue to control the onset of foot dermatitis. B) Manipulation of several farm parameters, such litter material and depth, stocking density and light regimen to improve the chicken welfare conditions, in winter season. 1. Even though 2 different stocking densities were established in this study, the performances achieved from the chickens were almost identical among groups. 2. The FCR was significantly better in Standard conditions contrarily to birds reared in Welfare conditions with lower stocking density, more litter material and with a light program of 16 hours light and 8 hours dark. 3. In our trial, in Standard groups we observed a higher content of moisture, nitrogen and ammonia released from the litter. Therefore it can be assumed that the environmental characteristics have been positively changed by the improvements of the rearing conditions adopted for Welfare groups. 4. In Welfare groups the exhausted litters of the pens were dryer and broilers showed a lower occurrence of FPD. 5. The prevalence of hock burn lesions, like FPD, is high with poor litter quality conditions. 6. The combined effect of a lower stocking density, a greater amount of litter material and a photoperiod similar to the natural one, have positively influenced the chickens welfare status, as a matter of fact the occurrence of FPD in Welfare groups was the lowest keeping the score under the European threshold of the proposal COM 221 final(2005). C) The purpose of the third research was to study the effect of high or low stocking density of broiler chickens, different types of litter and the adoption of short or long lighting regimen on broiler welfare through the evaluation of their productivity and incidence of foot pad dermatitis during the hot season. 1. The feed efficiency was better for the Low Density than for High Density broilers. 2. The appearance of FPD was not influenced by stocking density. 3. The foot examination revealed that the lesions occurred more in birds maintained on chopped wheat straw than on wood shaving. 4. In conclusion, the adoptions of a short light regimen similar to that occurring in nature during summer reduces the feed intake without modify the growth rate thus improving the feed efficiency. Foot pad lesion were not affected neither by stocking densities nor by light regimens whereas wood shavings exerted a favourable effect in preserving foot pad in good condition. D) A study was carried out to investigate more widely the possible role of 25-hydroxycholecalciferol supplemented in the diet of a laying hen commercial strain (Lohmann brown) in comparison of diets supplemented with D3 or with D3 + 25- hydroxycholecalciferol. Egg traits during a productive cycle as well as the bone characteristics of the layers have been as well evaluated to determine if there the vitamin D3 may enhance the welfare status of the birds. 1. The weight of the egg and of its components is often greater in hens fed a diet enriched with 25-hydroxycholecalciferol. 2. Since eggs of treated groups are heavier and a larger amount of shell is needed, a direct effect on shell strength is observed. 3. At 30 and at 50 wk of age hens fed 25 hydroxycholecalciferol exhibited greater values of bone breaking force. 4. Radiographic density values obtained in the trial are always higher in hens fed with 25-hydroxycholecalciferol of both treatments: supplemented for the whole laying cycle (25D3) or from 40 weeks of age onward (D3+25D3).

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Existe un amplio consenso internacional de que los flujos de inversión en el sector agrícola en los países en desarrollo necesitan ser aumentados. Pero hay también acuerdo en que estas inversiones deben ser sostenibles. Para ser sostenibles, no sólo ha de ser beneficioso para la economía pública, sino también para los hogares rurales y el medio ambiente en el corto y el largo plazo. Para que las inversiones sostenibles tengan lugar, dependera sobre todo del marco jurídico en el que estas inversiones estén situadas. Esto es cierto para los marcos jurídicos nacionales, tanto del país de origen como del país receptor de la inversión. Pero los marcos jurídicos internacionales en los que están inmersos los estados de origen y de acogida también establecen incentivos positivos o negativos para que las inversiones sean sostenibles. Este trabajo presenta una visión general de los marcos normativos que vienen a centrarse en este aspecto. A continuación, se profundiza en la regulación del comercio internacional de productos agrícolas, asumiendo que las inversiones sostenibles en la agricultura suponen un “régimen de comercio sostenible”. De esta manera, el artículo presenta las partes del debate sobre un régimen comercial agrícola sostenible, como ha sido desarrollado por la autora en los últimos años.

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This article examines the legal evolution of Chile's trade policy, starting on the second half of the twentieth century until today, with special emphasis on international treaties.