The aim was to evaluate the effect of different energy diets available in adulthood on the longevity, dispersal capacity and sexual performance of Aedes aegypti produced under a mass-rearing system. To evaluate the effects of diets in relation to the survival of the adult male insects of Ae. aegypti, six treatments were used: sucrose at a concentration of 10%, as a positive control (sack10); starvation, as a negative control (starvation); sucrose at a concentration of 20% associated with 1 g/l of ascorbic acid (sac20vitC); wild honey in a concentration of 10% (honey10); demerara sugar in a 10% concentration (demerara10); and sucrose at a concentration of 20% associated with 1 g/l of ascorbic acid and 0.5 g/l of amino acid proline (sac20vitCPr). Each treatment had 16 cages containing 50 adult males. For the tests of flight ability and propensity to copulation, five treatments were used (saca10; sac20vitC; mel10; demerara10; and sac20vitCPr), with males each for flight ability and females copulated by a single male for copulation propensity. The diet composed of sucrose at a concentration of 20% associated with ascorbic acid, as an antioxidant, improved the survival, flight ability and propensity to copulate in Ae. aegypti males under mass-rearing conditions, and may be useful to enhance the performance of sterile males, thus improving the success of sterile insect technique programmes.

In the mid-1920s, Solomon Tshekisho Plaatje toured the South African countryside showing films he brought from the Tuskegee Institute in the United States. Plaatje’s cinema tours complemented his educational talks on the status of Africans in the Union of South Africa alongside the material he collected for books, speeches and political tours. Focusing on the itinerant cinema as an element of fieldwork, our article asks what can be learned from approaching Plaatje’s research practices. We consider Plaatje’s methods of research in relation to conventional notions of social scientific fieldwork, which also relied on modern media but were often entangled in colonial projects that projected an image of African rural life. Drawing on letters, novels, and accounts of his film screenings, our essay argues for an interdisciplinary engagement with cinema practices in African history that is attentive to the uses of mass media in research and the pedagogical valences of itinerant film screenings. Considering Plaatje’s cinema alongside the value he attached to travelling and mobility, we argue that his cinema puts the field to work and inspires new practices of research in African Studies.

The International Committee of the Red Cross and the International Criminal Court are two very different entities that simultaneously apply international humanitarian law but do so after their own perspectives. This article proposes a cautious yet critical approach to some of their divergent interpretations (conflict classification, the difference between direct and active participation in hostilities, intra-party sexual and gender-based violence, and the notion of attack) and examines how the broader legal system copes with these points of divergence. The analysis considers the institutional characteristics of these two organizations and the pluralistic nature of international humanitarian law as well as its dynamic rapport with international criminal law in order to highlight the versatility needed to face the challenges posed by contemporary armed conflicts.

Fossil fuels are of utmost importance to the world we live in today. However, their use can cause major impacts on the environment, especially on water resources. In this regard, algae have been intensively used as a strategy for remediation and monitoring of environmental pollution due to its efficient absorption of contaminants. In this work, samples of seaweed collected in Niterói/RJ—contaminated with kerosene and diesel—were analyzed by radiocarbon (14C) accelerator mass spectrometry (AMS) and by n-alkane quantification with gas chromatography to evaluate bioaccumulation in function of the dosage of contaminants. The biogenic content measured by radiocarbon analysis resulted in 95.6% for algae contaminated with 10 mL of kerosene and 67.6% for algae contaminated with 10 mL of diesel. The maximum intensity of n-C17 n-alkane in algae with 5 mL, 10 mL, and 15 mL of diesel was 768.2, 1878.1, and 5699.2 ng.g-1, respectively. While the maximum concentration of n-C27 in algae with 5 mL, 10 mL and 15 mL of kerosene was 3.3, 35.9, and 150.3 ng.g-1. We concluded that, for both contaminants, their incorporation into algae increases as the contamination dosage increases, making this methodology an effective technique for monitoring and remediation of urban aquatic ecosystems.

The worst rates of preventable mortality and morbidity among women and children occur in humanitarian settings. Reliable, easy-to-use, standardized, and efficient tools for data collection are needed to enable different organizations to plan and act in the most effective way. In 2015, the World Health Organization (WHO) commissioned a review of tools for data collection on the health of women and children in humanitarian emergencies. An update of this review was conducted to investigate whether the recommendations made were taken forward and to identify newly developed tools. Fifty-three studies and 5 new tools were identified. Only 1 study used 1 of the tools identified in our search. Little has been done in terms of the previous recommendations. Authors may not be aware of the availability of such tools and of the importance of documenting their data using the same methods as other researchers. Currently used tools may not be suitable for use in humanitarian settings or may not include the domains of the authors’ interests. The development of standardized instruments should be done with all key workers in the area and could be coordinated by the WHO.

We describe the digenean fauna of one of the dominant intertidal hosts, the common cockle Cerastoderma edule, in terms of biomass, off north-eastern Atlantic shores. Using published and unpublished literature we have prepared an identification key and provide an up-date of the large-scale distributional patterns of digenean species of the common cockle. At least sixteen digenean species, belonging to seven families, use cockles as intermediate host. Among these species two utilize cockles as first intermediate host only, whereas two species utilize cockles as both first and second intermediate host. The remaining eleven species have cockles as their second intermediate host. Water birds and fish are the definitive hosts to twelve and four species, respectively.

Cockles are infected with digeneans along the latitudinal gradient from southern Morocco to the western region of the Barents Sea often with high infection levels. Whereas some of these digenean species occur along most of the latitudinal gradient others show a more restricted northern or southern distribution mostly caused by an underlying latitudinal gradient of host species.

Knowledge of digenean species and their large-scale distribution pattern may serve as a baseline for future studies dealing with the effects of climate change on parasite–host systems. For such studies the cockle and its digenean community could be an ideal model system.

Let X be an infinite set and suppose א0 ≤ q ≤ |X|. The Baer-Levi semigroup on X is the set of all injective ‘total’ transformations α: X → X such that |X\Xα| = q. It is known to be a right simple, right cancellative semigroup without idempotents, its automorphisms are “inner”, and some of its congruences are restrictions of Malcev congruences on I(X), the symmetric inverse semigroup on X. Here we consider algebraic properties of the semigroup consisting of all injective ‘partial’ transformations α of X such that |X\Xα| = q: in particular, we descried the ideals and Green's relations of it and some of its subsemigroups.