Thermal requirements of immature stages of Chrysomya albiceps (Diptera: Calliphoridae) as a common forensically important fly

Entomological material may be used to estimate the time since death occurred (postmortem interval, PMI) in forensically obscure cases. The method that is commonly used to calculate minimum post-mortem interval (mPMI, i.e., the least amount of time since one can be confident death occurred) is based on the relationship between insect development and ambient temerature. Isomegalen and isomorphen diagrams are among methods allowing to calculate the age of necorphagous insects, yet thermal summation models provide the most precise and acurate estimations. The digrams are prepared based on the length or the developmental stages of the larvae as a function of time and mean ambient temperature. A knowledge of thermal requirements, in particular lower temperature threshold (D_z) at which development of a species terminates, is of essential importance to calculate ADD (Accumulated Degree Days). In this study different temperature regimes were used to construct the isomorphen diagram, examinate changes in larval body length at different ambient temperatures and to estimate the thermal requirements for developemnt of Chrysomya albiceps, the most common dipteran species reported on human and animal cadavers in Iran. Six development events including hatching, 1st ecdysis, 2nd ecdysis, wandering, pupariation and eclosion were studied under eleven constant temperature regims (17–37 ⁰C). The development rate of Ch. albiceps increased as temperature increased. The larval length peaked at the end of third stage and then decreased at wandering stage. The maximum larval length occurred at 72 h post oviposition at either 31, 33, or 35 °C. At 17 °C, larvae did not hatch from eggs and at 37 °C wandering larvae did not proceed to pupariation, and thus larval development were analysed at the nine left over temperatures. The development stages required at least (D_z ± SE) 13.04 ± 0.37, 14.29 ± 0.45, 15.69 ± 0.56, 15.18 ± 0.56, 14.94 ± 0.48, and 11.23 ± 0.41 °C to reach one of the successive developmentl events, respectively. The estimated thermal summation constant (k) for those the six events were 10.43 ± 0.27, 19.31 ± 0.32, 27.87 ± 1.3, 55.94 ± 1.82, 66.69 ± 3.5, and 143.52 ± 5.61 ADD accordingly.     

Making political citizens? Migrants’ narratives of naturalization in the United Kingdom*

Citizenship tests are arguably intended as moments of hailing, or interpellation, through which norms are internalized and citizen-subjects produced. We analyse the multiple political subjects revealed through migrants’ narratives of the citizenship test process, drawing on 158 interviews with migrants in Leicester and London who are at different stages in the UK citizenship test process. In dialogue with three counter-figures in the critical naturalization literature – the ‘neoliberal citizen’; the ‘anxious citizen’; and the ‘heroic citizen’ – we propose the figure of the ‘citizen-negotiator’, a socially situated actor who attempts to assert control over their life as they navigate the test process and state power. Through the focus on negotiation, we see migrants navigating a process of differentiation founded on pre-existing inequalities rather than a journey toward transformation.     

Local risk perceptions to identify institutional and development planning needs

The article studies how local risk perceptions are influenced by state support for provision of public goods and overall institutional arrangements for the management of common pool resources (CPRs). Purposively selected communities from tribal and settled areas with variations in access to irrigation flows (perennial and non-perennial) set up a matrix for analysis. The composite risk index was constructed by calculating an incidence and severity index based on the local perceptions. The research findings have policy implications for development planning through the identification of livelihood risks, and risks associated with the management of CPRs.

Perceptions locales du risque afin d'identifier les besoins de planification institutionnels et sur le plan du développement

Cet article étudie la manière dont les perceptions locales du risque sont influencées par le soutien apporté par l’État à la fourniture de biens publics et de dispositions institutionnelles globales en vue de la gestion des ressources mises en commun (RMC). Des communautés sélectionnées sur la base d'objectifs définis dans des zones tribales et sédentaires avec un accès variable aux flux d'irrigation (pérennes et non pérennes) forment une matrice pour l'analyse. L'indice composite de risque a été élaboré en calculant un indice de fréquence et de gravité basé sur les perceptions locales. Les conclusions des recherches ont des implications sur le plan des politiques générales pour la planification du développement à travers l'identification des risques pour les moyens de subsistance, et des risques associés à la gestion des RMC.

Percepciones de riesgo locales para identificar las necesidades de planeación institucional y de desarrollo

El presente artículo tiene como objetivo examinar cómo las percepciones de riesgo locales son determinadas por el apoyo estatal para la provisión de bienes públicos y por las normas institucionales generales para la gestión de recursos utilizados en común (common pool resources o cpr). Para el efecto, se seleccionaron comunidades de áreas tribales y urbanizadas que presentaban variaciones de acceso a los flujos de irrigación (perennes y no perennes). Dichas comunidades establecieron una matriz para su análisis. Basándose en las percepciones locales se construyó el índice de riesgo compuesto, calculando un índice de incidencia y de severidad. Los hallazgos de la investigación tienen implicaciones a nivel de políticas públicas para la planeación de desarrollo mediante la identificación de riesgos para los medios de vida y de riesgos asociados al manejo de los cpr.

Percepções de risco locais para identificar as necessidades de planejamento institucional e de desenvolvimento

O artigo estuda como as percepções de risco locais são influenciadas pelo apoio do estado para provisão de bens públicos e arranjos institucionais em geral para a gestão de recursos de uso comum (Common Pool Resources - CPRs). Comunidades selecionadas propositadamente de áreas tribais e de assentamento, com variações no acesso a fontes de irrigação (perenes e não-perenes), estabeleceram uma matriz para análise. O índice de risco composto foi construído calculando-se um índice de incidência e de gravidade com base nas percepções locais. Os resultados da pesquisa possuem implicações de políticas para o planejamento de desenvolvimento através da identificação dos riscos dos meios de subsistência e os riscos associados à gestão dos CPRs.