Introductory paragraphFemale aggression towards other females is associated with reproduction in many taxa, and traditionally thought to be related to the protection or provisioning of offspring, such as through increased resource acquisition. However, the underlying reproductive factors causing aggressive behaviour in females remain unknown. Here we show that female aggression in the fruit fly Drosophila melanogaster is strongly stimulated by the receipt of sperm at mating, and in part by an associated seminal fluid protein, the sex peptide. We further show that the post-mating increase in female aggression is decoupled from the costs of egg production and from post-mating decreases in sexual receptivity. Our results suggest that male ejaculates can have a surprisingly direct influence on aggression in recipient females. Male ejaculate traits thus influence the female social competitive environment with potentially far-reaching ecological and evolutionary consequences.

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Although not new topics in the field of refugee studies, self-reliance, livelihoods and entrepreneurship have recently taken on a heightened emphasis. However, critical questions remain regarding how and by whom self-reliance is defined and measured, and the intended and unintended outcomes of historical and contemporary efforts to foster it. This introductory article highlights key points arising from the Special Issue and presents a short history of the evolution of the concept of self-reliance in the twentieth and twenty-first centuries, including its linkage to livelihoods. The article then discusses contemporary connections between self-reliance and entrepreneurship vis-à-vis the promotion of the ‘refugee entrepreneur’. It concludes with a brief overview of the articles and themes in the issue. Overall, the article argues for an expanded definition of refugee self-reliance that promotes social as well as economic components and moves beyond narrowly implemented programmes targeting individual and market-based solutions.

When refugees flee war and persecution, protection and assistance are usually provided by United Nations organisations and their NGO implementing partners. In parallel is a largely neglected story: refugees themselves frequently mobilise to provide protection and assistance to other refugees. At a global level, there has been a shift in international policy rhetoric towards 'localisation' and inclusion of refugees, which potentially provides an opportunity to engage with refugee-led community organisations (RLOs). However, RLOs rarely receive access to international recognition or funding despite often being regarded by refugees as an important source of assistance. In this paper we draw upon ethnographic research on the interactions between international institutions and RLOs in Kampala, Uganda, to explore how 'localisation' unfolds in practice within humanitarian governance. In the absence of a clear policy framework for localisation at the global level, national level representatives have considerable discretion in whether and how they partner with RLOs, leading largely to their exclusion-and the development of alternative support strategies by RLOs. We suggest that an effective localisation agenda will require much more attention to the role of power and interests at the local level if RLOs are to be engaged as meaningful actors in humanitarian assistance.