Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 8 de 8
Filtrar
Mais filtros








Base de dados
Intervalo de ano de publicação
1.
Environ Sci Policy ; 117: 25-33, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33658898

RESUMO

Current trends in climate change indicate that the impact on the most vulnerable systems will increase. Urban areas, which concentrate population, economic activity and infrastructures, are sometimes at high-risk locations. Yet they are to be considered as vulnerable systems in need of harmonized structures supporting their efforts towards mitigating climate effects and/or adapting their territories to them. One current structure is the Covenant of Mayors for Climate and Energy (CoM) initiative, tackling in a global and harmonized way local adaptation to climate change. Do CoM cities that developed acceptable climate change adaptation plans have similar characteristics? It is still unclear which might be the drivers or key attributes potentially leading to successful planning within the initiative. In this paper, we explore attributes of the first 51 cities that have submitted their adaptation plans to CoM, in order to identify common elements among accepted plans. Therefore, our hypothesis is that there must be attributes determining the acceptance of adaptation plans. In order to do so, the cities were classified as compliant and non-compliant with the CoM principles. Fisher's and Kolmogorov-Smirnov tests were applied to identify attributes that are statistically different between both groups. Results show that the engagement of multiple stakeholders and citizens, particularly at the local level, might significantly facilitate the acceptance of adaptation plans in the initiative. We also found that the benefits of stakeholder and citizen engagement could be greater in small municipalities because citizens and stakeholders have more opportunities to participate.

2.
Ecol Econ ; 177: 106791, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33144752

RESUMO

The frequency and intensity of extreme climate events are increasing all around the world, due to climate change. Climate adaptation strategies are therefore needed, since mitigation strategies alone are not sufficient to avoid serious impacts of climate change. However, adaptation to climate change is not straightforward, as it is highly influenced by diverse and conflicting interests as well as epistemological (or scientific) uncertainties. Therefore, a minimum requirement for its success is the active participation of stakeholders and citizens in the adaptation policy cycle. This paper presents a case study on a participatory process involving civil servants from different municipalities in Malaysia, in Southeast Asia, with a view to considering the optimal level of engagement that is required for climate adaptation planning. The exercise consisted of a Focus Group session, where participants were asked to discuss the level of stakeholder and citizen participation that should be adopted within the Global Covenant of Mayors for Climate and Energy initiative. Contrary to authors' expectations, the participants tended to suggest medium to high levels of participation in the planning process. During the dialogues, a walking activity through the city, aimed at identifying hotspots of climate risks and defined as "safety walks", was one of the ideas proposed as a high-potential participatory method, spreading in the adaptation framework. Safety walks could complement climate modelling and enhance the robustness of climate risk assessments.

3.
Heliyon ; 6(10): e05043, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33072902

RESUMO

The European Commission established the Covenant of Mayors (CoM) initiative in 2008, aimed at involving and supporting mayors to encourage accomplishing the European Union (EU) climate mitigation and energy targets. In 2014, the Mayors Adapt initiative was set up in order to promote the climate adaptation pillar. Whereas the mitigation pillar is more developed and peer-reviewed literature can be found, adaptation is still lagging behind, not to mention the absence of information on the effectiveness of the CoM concerning the development of climate adaptation plans. This paper aims at presenting a thorough analysis of climate hazard data declared by CoM signatories as well as the degree of regional agreement of those signatories when reporting climate data. Thus, we assume that the signatories belonging to the same climate region should report similar climate hazard data for both current and future timeframes. Using a new statistical method for measuring the variability of categorical data, we determine that, overall, the signatories show low agreement within climate regions. Hence, we conclude that the CoM, in the corresponding part of climate risk assessment, is not as effective as it could be desired. Furthermore, several recommendations are proposed to improve the current reporting.

4.
Parasite Immunol ; 40(9): e12569, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-29959770

RESUMO

The experimental protocol of immunization tested here confirms its protective effect against Haemonchus contortus in goats. This protection translated into a 65.5% mean reduction in adult worm burden after a homologous challenge, and a significant decrease (73.2%) in cumulative faecal egg counts (FECs). These parasitological findings were consistent with the levels of some biopathological parameters. Thus, the reduction in adult worms and FEC observed in immunized animals were associated with increased levels of packed cell volume as well as plasma proteins. This response seems to be related to an important increase in specific antibodies (in serum and gastric mucus) and eosinophilia in response to challenge. At the local level, a cellular response was also observed in which CD4+ lymphocytes and globule leucocytes played a predominant role. Finally, it should be noted that the study of immunolocalization of proteins used in the vaccination trial suggests that these antigens have an internal location (at intestinal and reproductive tissues) in the adult worm. This observation, in conjunction with the kinetics of specific antibody levels after the challenge, suggests that these antigens may be part of excretory/secretory (E/S) products.


Assuntos
Doenças das Cabras/imunologia , Doenças das Cabras/prevenção & controle , Hemoncose/veterinária , Haemonchus/imunologia , Proteínas de Helminto/imunologia , Animais , Anticorpos Anti-Helmínticos/sangue , Fezes/parasitologia , Feminino , Doenças das Cabras/parasitologia , Cabras/imunologia , Hemoncose/imunologia , Hemoncose/parasitologia , Hemoncose/prevenção & controle , Haemonchus/genética , Proteínas de Helminto/administração & dosagem , Proteínas de Helminto/genética , Intestinos/imunologia , Intestinos/parasitologia , Masculino , Contagem de Ovos de Parasitas , Vacinação/veterinária , Vacinas/administração & dosagem , Vacinas/genética , Vacinas/imunologia
5.
Environ Sci Policy ; 80: 28-37, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29456455

RESUMO

Adaptation to climate change has been considered to be crucial to current societies, especially for small islands. In this paper the case of Tenerife (in the Canary Islands) is analysed. Tenerife is a small island located northwest of the African continent, in the Atlantic Ocean. Tenerife presents a high vulnerability to heatwaves and Saharan dust events as a consequence of its closeness to the Saharan desert. In fact, increasing frequency of heatwaves and Saharan dust events has been reported and could worsen in the future due to global warming. An exploration of adaptation strategies to an increase of the frequency and intensity of these phenomena is therefore needed. Different social actors have been engaged in a participatory process aiming at exploring pathways for adaptation to extreme weather events. Resilience was argued as the relevant framing to address those hazards. Four focus group sessions were carried out in order to explore key transformative elements necessary to make resilient futures for Tenerife. The results highlight the need for broader climate-based policies across all sectors to assure that the island becomes resilient to climatic and non-climatic shocks.

6.
Environ Sci Policy ; 89: 184-191, 2018 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31007600

RESUMO

Heat waves and Saharan dust outbreaks have been acquiring more frequency and intensity in the Canary Islands during the last decades. Both climatic hazards are known to produce impacts on human health such as mortality (due to heat waves) and morbidity (due to dusty weather). This work addresses possible climate adaptation policies in Tenerife assuming the increasing impact of heat waves and Saharan dust outbreaks in the island under a climate change scenario. It explores the institutional setting of climate change adaptation planning in Tenerife and evaluates the statu quo of adaptation planning in the island through the engagement of key social actors. An historical review of the local and regional press articles and legislation, an in-depth round of interviews, together with questionnaires to the main social actors allows framing the social and political context in which climate change adaptation in Tenerife is embedded. Key social actors were engaged, including international organisations, atmospheric research centres, local Universities, regional and insular governments, trade unions, and environmental NGOs, among others. The main obstacles mentioned by the social actors that hinder the development of an effective climate adaptation policy address scientific knowledge, data collection and policy making, focusing on the uncertainty of climate models, the lack of epidemiological data and contrasting opinions regarding the existing climate adaptation policies. Public participation, mainstreaming of climate policies and an integrated approach between mitigation and adaptation plans were identified as key policy issues. The outcomes of this study could be meaningful for climate adaptation initiatives at local or regional level, such as the Global Covenant of Mayors, that intend to promote climate resilience through the setup of climate adaptation strategies and plans at municipality level.

7.
Parasitol Res ; 110(6): 2131-6, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22193521

RESUMO

Coccidiosis is probably the main parasitic disease affecting goat kids around the weaning period, leading to high economic losses in goat production due to deaths and delayed growth rates of infected animals. A total of 101 kids of 2-4 weeks of age, naturally infected with Eimeria spp., were divided into five groups and studies were conducted to analyse the effects of metaphylactic administration of diclazuril (Vecoxan®) on parasitological and productive parameters. Two different doses of diclazuril (1 and 2 mg/kg BW, p.o.) were given either at 3 weeks (single treatment) or at 3 and 5 weeks of life (double treatment). The faecal oocyst shedding and the body weights of the animals were monitored at 2-weeks intervals for 6 consecutive weeks. Treatments of goat kids with diclazuril were effective against the three most predominant Eimeria species recorded in this study (E. arloingi, E. ninakohlyakimovae and E. christenseni) and also against other minor species found in faecal examinations, including E. alijevi, E. caprina, E. jolchijevi, E. caprovina, E. hirci and E. aspheronica). In consequence, OPG values lower than 1 × 10(3) were detected in 90 to 100% of the animals up to 15-20 days post-treatment depending on the treatment regimen. Even a single dose of 1 mg/kg BW p.o. resulted in an increase of growth rates in treated animals and therefore should be considered as a control strategy in farms precluding coccidian infections, whilst double and multiple dose treatments could be the recommendation for environments heavily contaminated with Eimeria oocysts. In relation to the OPG reduction and increased growth rates, the severity of the clinical signs (i.e., diarrhoea) was ameliorated in treated animals during the course of infection compared to that of non-treated or control kids. The precise timing of treatment appears crucial in order to prevent severe clinical coccidiosis and thereby enabling the adequate development of protective immune response against Eimeria challenge infections.


Assuntos
Antiprotozoários/administração & dosagem , Coccidiose/tratamento farmacológico , Coccidiose/veterinária , Eimeria/isolamento & purificação , Doenças das Cabras/tratamento farmacológico , Nitrilas/administração & dosagem , Triazinas/administração & dosagem , Animais , Coccidiose/parasitologia , Eimeria/efeitos dos fármacos , Fezes/parasitologia , Cabras , Carga Parasitária , Resultado do Tratamento
8.
Vet Res ; 35(5): 565-72, 2004.
Artigo em Inglês | MEDLINE | ID: mdl-15369659

RESUMO

Haemonchus cysteine proteases, because of their apparent critical function in worm physiology, are considered important candidates in the immunological control of haemonchosis in sheep. Only limited information is, however, available on the immunoprotective properties of these molecules in goats. In the present study cysteine proteases of Haemonchus contortus adult worms isolated from a goat strain (Gran Canaria, Spain) were enriched by affinity chromatography and evaluated as immunoprotective antigens against caprine haemonchosis. The eggs per gram of faeces averaged over the whole experiment for unvaccinated goats (550 +/- 13.5) was significantly greater (P < 0.001) than that of vaccinated goats (61 +/- 2.9). Accordingly, the worm burden was significantly different between the groups (P < 0.05), with mean values of 247.5 +/- 43.8 and 762.5 +/- 78.3 worms per animal in the immunized and nonimmunized goats, respectively. The percentage of egg (89%) and worm (68%) reduction approached those attained with other immunogens used in sheep.


Assuntos
Cisteína Endopeptidases/química , Doenças das Cabras/prevenção & controle , Hemoncose/veterinária , Haemonchus/imunologia , Vacinas , Animais , Anticorpos Anti-Helmínticos/análise , Eletroforese em Gel de Poliacrilamida/veterinária , Fezes/parasitologia , Cabras , Hemoncose/prevenção & controle , Haemonchus/enzimologia , Masculino , Contagem de Ovos de Parasitas , Vacinação/veterinária
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA