Food supplementation mitigates dispersal-dependent differences in nest defence in a passerine bird

Funding. This work was supported by the Centre National de la Recherche Scientifique (PICS France-Switzerland to BD), the Ministe`re de l’Enseignement Supe´rieur et de la Recherche (PhD fellowship to CR), the University of Aberdeen (stipend to CR), the Uppsala Universitet (stipend to GD), the Universite´ de Lausanne (grant to JT), the Re´gion Rhoˆne-Alpes (Programme Cible PhD fellowship to GD and Explora’doc mobility grants to CR and GD), the L’Ore´al Foundation-UNESCO ‘For Women in Science’ programme (fellowship to CR), the Rectors’ Conference of the Swiss Universities and the Fondation pour l’Universite´ de Lausanne (grants to CR).

Risk from cattle trampling to nests of an endangered passerine evaluated using artificial nest experiments and simulations

Grasslands are often grazed by cattle and many grassland birds nest on the ground, potentially exposing nests to trampling. We tested for trampling risk introduced by cattle to nests of endangered Florida Grasshopper Sparrows (Ammodramus savannarum floridanus) using experimentally paired grids of artificial nests (i.e., clay targets) similar in size to nests of Florida Grasshopper Sparrows and counted the number of clay targets that were broken in paired grazed and ungrazed enclosures. Clay targets in grazed grids were trampled 3.9% more often than their respective ungrazed grids, and measurements of cattle presence or density were correlated with the number of broken clay targets, suggesting that excluding cattle during breeding is an important management recommendation for the Florida Grasshopper Sparrow. Trampling rates within grazed enclosures were spatially homogeneous with respect to cattle infrastructure such as supplemental feeding troughs and fences, and forests and stocking density were poor predictors of trampling rates when excluding ungrazed grids. We used population viability analysis to compare quasi-extinction rates, intrinsic growth rates, and median abundance in grazed and ungrazed Florida Grasshopper Sparrow aggregations to further understand the biological significance of management aimed at reducing trampling rates during the breeding season. Simulations indicated that trampling from grazing increased quasi-extinction rates by 41% while reducing intrinsic growth rates by 0.048, and reducing median abundance by an average of 214 singing males after 50 years. Management should avoid grazing enclosures occupied by Florida Grasshopper Sparrows during the nesting season to minimize trampling rates. Our methods that combine trampling experiments with population viability analysis provide a framework for testing effects from trampling on other grassland ground-nesting birds, and can directly inform conservation and management of the Florida Grasshopper Sparrow.

Sandcastles of hope? Civil society organizations and the working conditions of migrant farmworkers in North America

This research explores whether civil society organizations (CSOs) can contribute to more effectively regulating the working conditions of temporary migrant farmworkers in North America. This dissertation unfolds in five parts. The first part of the dissertation sets out the background context. The context includes the political economy of agriculture and temporary migrant labour more broadly. It also includes the political economy of the legal regulations that govern immigration and work relations. The second part of the research builds an analytical model for studying the operation of CSOs active in working with the migrant farmworker population. The purpose of the analytical framework is to make sense of real-world examples by providing categories for analysis and a means to get at the channels of influence that CSOs utilize to achieve their aims. To this end, the model incorporates the insights from three significant bodies of literature—regulatory studies, labour studies, and economic sociology. The third part of the dissertation suggests some key strategic issues that CSOs should consider when intervening to assist migrant farmworkers, and also proposes a series of hypotheses about how CSOs can participate in the regulatory process. The fourth part probes and extends these hypotheses by empirically investigating the operation of three CSOs that are currently active in assisting migrant farm workers in North America: the Agricultural Workers Alliance (Canada), Global Workers’ Justice Alliance (USA), and the Coalition of Immokalee Workers (USA). The fifth and final part draws together lessons from the empirical work and concluded that CSOs can fill gaps left by the waning power of actors, such as trade unions and labour inspectorates, as well as act in ways that these traditional actors can not.

The Material Dynamics of a London-French Blog: A Multimodal Reading of Migrant Habitus

Through a fine-grained reading of a London-French blog, this article aims to shed light on the lived experience of the French community in London. The ethnosemiotic conceptual framework brings together ethnographic and semiotic schools of thought, focusing in particular on Pierre Bourdieu’s concept of habitus and Gunther Kress’s multimodal social semiotic analytical model. Habitus is broken down into its material manifestations of habitat, habit and habituation, all displayed in the blog and revealing of the blogger’s identity and positioning within the migration setting. As all modes are considered to be of equal semiotic potential, equivalent emphasis is placed on the multiple modes of meaning-making present in the blog, such as layout, colour, typography and language. By examining the dynamic relationships between blogger and audience, subjectivity and objectivity, on-line and on-land habitus, and intermodal dynamics themselves, through the prism of multimodality, hidden facets of the blogger’s cultural identity and sense of community belonging within the diasporic context begin to materialise.

Migrant domestic workers, vulnerability and the law: immigration and employment laws in Cyprus and Spain

The intersection of gender, welfare and immigration regimes has been one of the main focus of a rich scholarship on paid domestic work in Europe. This article brings into the discussion the nexus of employment and immigration law regimes to reflect on the role of legal regulation in structuring and reducing the vulnerability of domestic workers. I analyse this nexus by looking at the cases of Cyprus and Spain, two states falling under the cluster of Southern Mediterranean welfare regimes, that share certain characteristics in terms of immigration regimes, but have substantially different employment law regulation models. The first part sketches the debate on the employment law regulation of domestic work. The second part starts by giving an overview of the immigration regimes of Cyprus and Spain in relation to migrant domestic workers and then proceeds to analyse the two countries’ models and substance of employment law regulation in domestic work. The comparison of these two divergent approaches informs the debate on how the legal regulation of domestic work should be best structured. In Spain there have been recent dynamic legislative changes in the employment law regulation of domestic work. The final part of the article traces these changes and reflects on why such processes have not taken place in Cyprus.

Migrant women’s employment in paid reproductive work through the crisis: the case of Italy (2007-2012)

Paid reproductive work, especially in the case of cleaning and home-care for elderly people, is an important sector for foreign women in Italy. For this reason, since the beginning of the current economic crisis, scholars have wondered about the impact of the recession on migrant domestic workers. They have looked particularly at possible competition with Italian women entering the sector for lack of better alternatives. Our paper takes this discussion a step further by assessing the overall changes affecting migrant women in the Italian labour market, 2007-2012. We will look at how their position has been transformed, by taking both an ethnic perspective, in relation to Italian women, and a gender perspective, in relation to migrant men. By way of a conclusion, the argument will be made that there is a substantial lack of competition between Italian and foreign women in the care and domestic sector due to differences in their earnings, hours of work and activities.

Migrant identities in a new immigrant destination: revealing the limitations of the ‘hard working’ migrant identity

Migrant labour has transformed local economies in many places, often helping to reverse long-term decline. The emergence of new immigrant destinations (NID) globally brings mixed opportunities for the individuals involved. This article uses empirical evidence, focusing on the workplace, to show the performance, construction and significance of migrant identity. By using social identity theory to examine what it means to be a ‘migrant’, it follows from Goffman’s overarching concern with social interactions and his promotion of microanalysis as analytical lenses.
The article reveals the ambiguity of the label ‘migrant’. It shows how the external application or internal enactment of migrant identities bestow particular status that represents an asset or an obstacle to integration. It can mean ‘hard working’, ‘less deserving’ and ‘exploitable’ and it also denotes ‘lazy’ and individuals. While some individuals assume the hard working migrant and ‘exploitable’ identity in certain circumstances because of the benefits that it brings, this status can also cause high levels of dissatisfaction and distress among migrants. The research shows how the creation of a migrant identity limits the structures and networks from which migrants may draw resources and in so doing curtails the possibilities for social change due to migration.

‘New’ migrant identities: unravelling opportunities and restrictions

Labour and capital mobility from globalisation has given rise to significant increases in the reliance of migrant labour in established gateways, but also in new migration destinations. Many aspects of migrant incorporation in new migration destinations have received some attention, not least regarding employer and employee relations. Less attention has been focused on the construction of migrant as a marker of identification, although identities, particularly regarding gender and ethnicity, in the workplace have received considerable attention. This article aims to illuminate knowledge on how migration produces social change thereby responding to a call from Batnitzky et al. (2009, p. 1290) for additional attention on what ‘the practical and symbolic effects of migration are as people move across different structures and institutions of social control….’ Mindful of Goffman’s (1969, 1983) emphasis on individual interactions and experiences, it examines what it means to be a migrant in terms of everyday encounters and experiences. It investigates the array and interplay of internal and external processes that create migrant identities and the implications of this for social integration.

The paper argues that one of the paradoxes of globalisation, and of the associated increased levels of migrant labour, is the construction of the migrant identity that ultimately impedes social integration. It shows how the application of migrant identity (internally and externally) bestows a particular status that affects (options for) individual behaviour and subsequent actions and outcomes. The paper argues that while migrants value the migrant identity status because of the benefits that it brings, this status can also cause high levels of dissatisfaction among migrants and it can exclude migrants from wider benefits of full citizenship. Migrants have individual identification processes, but external forces, including social structures and institutions, also affect migrant identity. These forces help to shape individual expectations and standards, contributing to identity interruption and dissonance.

The paper is structured as follows: it uses social identity theory as a means of understanding what it is to be a ‘migrant’ in a new destination, while simultaneously recognising the inevitability of this generic label - migrants are an extremely heterogeneous group, made up of individuals with different experiences, values and so forth. The analysis considers the significance of context and of social interactions, thus paying attention to how identity is constructed and performed by the individual and also assigned by others. Empirical evidence is used to examine how having a migrant status affects individual prospects. The paper evaluates the extent to which patterns and processes of migration present an opportunity for social change, positive or negative.

Chinese Migrant Workers in Kenya: Their Health Status and Access to Health Care

Thesis (Master's)--University of Washington, 2016-06

Early post-fledgling survival in a fragmented population of a tropical cooperative breeding passerine

During the last years tropical forest has been a target of intense study especially due to its recent big scale destruction. Although a lot still needs to be explored, we start realizing how negative can the impact of our actions be for the ecosystem. Subsequently, the living community have been developing strategies to overcome this problem avoiding bottlenecks or even extinctions. Cooperative breeding (CB) has been recently pointed out as one of those strategies. CB is a breeding system where more than two individuals raise one brood. In most of the cases, extra individuals are offspring that delay their dispersal and independent breeding what allows them to help their parents raising their siblings in the subsequent breeding season. Such behavior is believed to be due, per example, to the lack of mates or breeding territories (ecological constraints hypothesis), a consequence of habitat fragmentation and/or disturbance. From this point, CB is easily promoted by a higher reproductive success of group vs pairs or single individuals. Accordingly, during this thesis I explore the early post-fledging survival of a cooperative breeding passerine, namely the impact of individual/habitat quality in its survival probability during the dependence period of the chicks. Our study species is the Cabanis’s greenbul (Phyllastrephus cabanisi), a medium-sized, brownish passerine, classified within the Pycnonotidae family. It is found over part of Central Africa in countries such as Angola, Democratic Republic of the Congo, Mozambique and Kenya, inhabiting primary and secondary forests, as well as woodland of various types up to 2700m of altitude. Previous studies have concluded that PC is a facultative cooperative breeder. This study was conducted in Taita Hills (TH) at the Eastern Arc Mountains (EAM), a chain of mountains running from Southeast Kenya to the South of Tanzania. TH comprises an area of 430 ha and has been suffering intense deforestation reflecting 98% forest reduction over the last 200 years. Nowadays its forest is divided in fragments and our study was based in 5of those fragments. We access the post-fledging survival through radio-telemetry. The juvenile survey was done through the breeding females in which transmitters were placed with a leg-loop technique. Ptilochronology is consider to be the study of feather growth bars and has been used to study the nutritional state of a bird. This technique considers that the feather growth rate is positively proportional to the individual capability of ingesting food and to the food availability. This technique is therefore used to infer for individual/habitat quality. Survival was lowest during the first 5 days post-fledging representing 53.3%. During the next 15 days, risk of predation decreased with only 14.3% more deceased individuals. This represents a total of only 33% survived individuals in the end of the 50 days. Our results showed yet a significant positive relationship between flock size and post-fledging survival as well as between ptilochronology values and post-fledgling survival. In practice, these imply that on this population, as bigger the flock, as greater the post fledging survival and that good habitat quality or good BF quality, will lead to a higher juvenile survival rate. We believe that CB is therefore an adaptive behaviour to the lack of mates/breeding territory originated from the mass forest destruction and disturbance. Such results confirms the critical importance of habitat quality in the post-fledging survival and, for the first time, demonstrates how flock size influences the living probability of the juveniles and therefore how it impacts the (local) population dynamics of this species. In my opinion, future research should be focus in disentangle individual and habitat quality from each other and verify which relationship exist between them. Such study will allow us to understand which factor has a stronger influence in the post-fledging survival and therefore redirect our studies in that direction. In order to confirm the negative impact of human disturbance and forest fragmentation, it would be of major relevance to compare the reproductive strategies and reproductive success of populations living in intact forests and disturbed patches.

Tangible mobile app store design for China's new generation migrant worker

China has the largest numbers of Internet users and mobile phone subscribers in the world, as well as the most extensive peacetime internal migration on the planet. Mobile phone uses play a very important role in migrant responses to alienation and discrimination. There are 150 million to 200 million migrant workers in China, 60% of them are the second-generation migrant workers. They support the nation’s manufacturing and industry. The majority of these individuals is poor and is from rural areas of the country. These young people are currently ignored by mainstream mobile device manufacturers, even though this constituency will be a growing consumptive segment in the future. Thus, my research will target the new-generation migrant workers in China, and concentrates on their mobile lives to best develop a tangible mobile devices application store that will improve their mobile experiences.

Reflexão sobre a imigração japonesa no Brasil sob o ângulo da adiposidade corporal

Populações migrantes representam oportunidade para se investigar a contribuição de fatores ambientais na gênese da obesidade e suas comorbidades. Em 1993, o Japanese-Brazilian Diabetes Study Group estudou a prevalência de diabetes e doenças associadas em nipo-brasileiros residentes em Bauru, SP. Utilizando critérios específicos para asiáticos, 22,4% dos nipo-brasileiros foram caracterizados como portadores de excesso de peso nessa primeira fase do estudo. Na segunda fase, em 2000, essa prevalência subiu para 44,2%, e 50,3% apresentavam obesidade central. Essa população também apresentava alta prevalência de diabetes tipo 2, hipertensão e dislipidemia, componentes da síndrome metabólica. O JBDS Group também mostrou a associação entre hábitos ocidentais, especialmente alimentação rica em gordura saturada, e a ocorrência de síndrome metabólica. Em 2005, motivado por esses achados, o JBDS Group iniciou a terceira fase do estudo que constou de programa de intervenção com base em orientação para dieta saudável e prática de atividade física, utilizando recursos factíveis em termos de saúde pública no Brasil. Após um ano de intervenção, o JBDS Group observou diminuição nos parâmetros antropométricos, pressão arterial e níveis de glicemia e colesterol. Tempo de acompanhamento maior é necessário para avaliar a persistência desses benefícios e o impacto deles no risco de desenvolver diabetes e eventos cardiovasculares.

O sexo sem lei, o poder sem rei: sexualidade, gênero e identidade no cotidiano travesti

Neste trabalho propomos questionar como são construídos e validados os discursos acerca de sexualidade, gênero e identidade sexual, a partir da história de vida de três irmãos homossexuais nascidos no interior do nordeste brasileiro. Ainda jovens, migraram para a cidade de Diadema - São Paulo, onde se tornaram, no decorrer de alguns anos, travestis e profissionais do sexo. A percepção da homossexualidade foi relatada como parte da infância, e sentida como uma força natural. Já, as transformações realizadas sobre o corpo decorrentes da travestilidade, a decisão pela prostituição, a orientação sexual (por homem ou por mulher), e a construção de uma identidade sexual (gay ou travesti), apareceram como instâncias dissociadas entre si e relacionadas à busca da valorização pessoal e social diante do estigma atribuído ao gay afeminado, pobre e migrante. A religiosidade afro-brasileira e a gramática yorubá assumiram relevância para a constituição desta possibilidade identitária.

Land planarians (Platyhelminthes) as a model organism for fine-scale phylogeographic studies: understanding patterns of biodiversity in the Brazilian Atlantic Forest hotspot

The Brazilian Atlantic Forest is one of the richest biodiversity hotspots of the world. Paleoclimatic models have predicted two large stability regions in its northern and central parts, whereas southern regions might have suffered strong instability during Pleistocene glaciations. Molecular phylogeographic and endemism studies show, nevertheless, contradictory results: although some results validate these predictions, other data suggest that paleoclimatic models fail to predict stable rainforest areas in the south. Most studies, however, have surveyed species with relatively high dispersal rates whereas taxa with lower dispersion capabilities should be better predictors of habitat stability. Here, we have used two land planarian species as model organisms to analyse the patterns and levels of nucleotide diversity on a locality within the Southern Atlantic Forest. We find that both species harbour high levels of genetic variability without exhibiting the molecular footprint of recent colonization or population expansions, suggesting a long-term stability scenario. The results reflect, therefore, that paleoclimatic models may fail to detect refugia in the Southern Atlantic Forest, and that model organisms with low dispersal capability can improve the resolution of these models.

Tetrachromacy, oil droplets and bird plumage colours

There is a growing body of data on avian eyes, including measurements of visual pigment and oil droplet spectral absorption, and of receptor densities and their distributions across the retina. These data are sufficient to predict psychophysical colour discrimination thresholds for light-adapted eyes, and hence provide a basis for relating eye design to visual needs. We examine the advantages of coloured oil droplets, UV vision and tetrachromacy for discriminating a diverse set of avian plumage spectra under natural illumination. Discriminability is enhanced both by tetrachromacy and coloured oil droplets. Oil droplets may also improve colour constancy. Comparison of the performance of a pigeon's eye, where the shortest wavelength receptor peak is at 410 nm, with that of the passerine Leiothrix, where the ultraviolet-sensitive peak is at 365 nm, generally shows a small advantage to the latter, but this advantage depends critically on the noise level in the sensitivity mechanism and on the set of spectra being viewed.