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Wild capture fisheries produce 90 million tonnes of food each year and have the potential to provide sustainable livelihoods for nearly 40 million people around the world (http://www.fao.org/3/a-i5555e.pdf). After decades of overfishing since industrialization, many global fish stocks have recovered, a change brought about through effective management. We provide a synthetic overview of three approaches that managers use to sustain stocks: regulating catch and fishing mortality, regulating effort and regulating spatial access. Within each of these approaches, we describe common restrictions, how they alter incentives to change fishing behaviour, and the resultant ecological, economic and community‐level outcomes. For each approach, we present prominent case‐studies that illustrate behaviour and the corresponding performance. These case‐studies show that sustaining target stocks requires a hard limit on fishing mortality under most conditions, but that additional measures are required to generate economic benefits. Different systems for allocation allow stakeholder communities to strike a locally acceptable balance between profitability and employment.

Marine protected areas (MPAs) have become a widely used tool for marine conservation and fisheries management. In coastal areas, it has become clear that the success of MPAs, and the achievement of sustainable fishery production, requires a combination of effective management and conservation frameworks, maintenance of decent fisheries livelihoods, and a governance system that allows for effective participation of coastal communities, fishing people, and other ocean users in considering, designing and implementing MPAs. These ingredients are crucial to provide the social sustainability needed to achieve ecological sustainability, and in particular, to reconcile fisheries and marine conservation objectives, in light of the United Nations Sustainable Development Goals and Aichi targets of the Convention on Biological Diversity (CBD). Since its inception in 1962, the series of World Parks Congresses (WPC) has focused on protected areas, in both terrestrial and marine domains. The 2014 WPC in Sydney reinforced the apparent movement, started at the Durban WPC of 2003, towards recognition of social and economic issues related to MPAs, including the importance of food security and livelihoods, and the crucial nature of interactions between MPAs and fisheries. Many discussions at the 2014 WPC focused on these human dimensions of MPAs, and the need to incorporate them into MPA decision-making. This article examines the process and outcomes of the 2014 WPC, with emphasis on the role of people (in particular, fishers) in marine conservation, and particularly in coastal MPAs. In doing so, the article examines the process of producing a Marine Statement at the end of the WPC, as a component of the final ‘Promise of Sydney’ declaration. That process led to a range of concerns including (i) issues over transparency and inclusiveness in the statement's development, and (ii) content issues focused on representation of the social and economic conclusions, and advocacy of a specific MPA target for no-take areas. The article focuses on potential strategies for moving constructively beyond the still existing tensions between environment- and people-focused conservation and development. Copyright © 2016 John Wiley & Sons, Ltd.

Long-term and well-managed marine protected areas (MPAs) can, under the right circumstances, contribute to biodiversity conservation and fisheries management, thus contributing to food security and sustainable livelihoods. This article emphasizes (1) the potential utility of MPAs as a fisheries management tool, (2) the costs and benefits of MPAs for fishing communities, and (3) the foundations of good governance and management processes for creating effective MPAs with a dual fisheries and conservation mandate. This article highlights case studies from numerous regions of the world that demonstrate practical and often successful solutions in bridging the divide between MPA management and fisheries sustainability, with a focus on small-scale coastal fisheries in order to emphasize lessons learned. To be an effective fisheries management tool, MPAs should be embedded in broader fisheries management and conservation plans. MPAs are unlikely to generate benefits if implemented in isolation. The spatial and temporal distribution of benefits and costs needs to be taken into account since proximal fishery-dependent communities may experience higher fishing costs over the short and long-term while the fisheries benefits from MPAs may only accrue over the long-term. Key lessons for effectively bridging the divide between biodiversity conservation and fisheries sustainability goals in the context of MPAs include: creating spaces and processes for engagement, incorporating fisheries in MPA design and MPAs into fisheries management, engaging fishers in management, recognizing rights and tenure, coordinating between agencies and clarifying roles, combining no-take-areas with other fisheries management actions, addressing the balance of costs and benefits to fishers, making a long-term commitment, creating a collaborative network of stakeholders, taking multiple pressures into account, managing adaptively, recognizing and addressing trade-offs, and matching good governance with effective management and enforcement. © 2014 The Authors. Aquatic Conservation: Marine and Freshwater Ecosystems published by John Wiley & Sons, Ltd.

Children are heavy users of the Internet and prior studies have shown that many of them lack a good understanding of the risks of doing so and how to avoid them. This study examined if the cross-age teaching zone (CATZ) intervention could help children acquire important knowledge of online risks and safety. It allowed older students to act as CATZ tutors to design and deliver a lesson to younger schoolmates (tutees), using content material about online risks and safety provided by adults. Students in Year 6 (mean age = 11.5 years) were randomly assigned to act as either CATZ tutors (n = 100) or age-matched controls (n = 46) and students in Year 4 (mean age = 9.5 years) acted as either CATZ tutees (n = 117) or age-matched controls (n = 28) (total N = 291). CATZ tutors, but not matched controls scored significantly higher on objective measures of knowledge of both online risks and safety, and CATZ tutees, but not matched controls did so for online safety. Effect sizes were moderate or large. CATZ was highly acceptable to participants. The results suggest that CATZ is a viable way to help school students learn about online dangers and how to avoid them.

The past 10–15 years have seen important extensions of the mortar method, a technique for joining dissimilar grids popularized by the domain decomposition community, to the more general problem of contact and impact interactions in finite element analysis. This development has taken place largely in response to several long-standing problems in computational contact mechanics: lack of robustness in solution of the nonlinear and nonsmooth equations of evolution; degradation of spatial convergence rates in problems involving nonconforming meshes on interfaces; lack of a variationally consistent technique for stress recovery on interfaces; and so on. This survey paper summarizes some of the major steps in development of mortar contact formulations. It begins with a basic summary of the mortaring idea in the context of tied contact, it discusses key concepts required for the extension of these methods to large deformation, large sliding formulations of contact-impact, and it previews new results where lessons learned from mortar contact formulations can be extended to a much broader class of interface mechanics applications, considering in particular enriched interface formulations and embedded interface approaches to fluid–structure interaction.

A new technique for treating the mechanical interactions of overlapping finite element meshes is proposed. Numerous names have been applied to related approaches, here we refer to such techniques as embedded mesh methods. Such methods are useful for numerous applications e.g., fluid-solid interaction with a superposed meshed solid on an Eulerian background fluid grid or solid-solid interaction with a superposed meshed particle on a matrix background mesh etc. In this work we consider the interaction of two elastic domains: one mesh is the foreground and defines the surface of interaction, the other is a background mesh and is often a grid. We first employ a classical mortar type approach [see Baaijens (Int J Numer Methods Eng 35:743---761, 2001)] to impose constraints on the interface. It turns out that this approach will work well except in special cases. In fact, many related approaches can exhibit mesh locking under certain conditions. This motivates the proposed version of Nitsche's method which is shown to eliminate the locking phenomenon in example problems.

This paper serves as an investigation into the response of the NASA space shuttle wing in the event of a debris impact during launch. The explicit finite element method is used to model the leading edge of the shuttle wing and the event of impact with a piece of a material from the shuttle's external tank. The results will be utilised by the Impact Penetration Sensor System (IPSS) to help characterise the signal received by the system in the event of an actual impact. Numerical results are validated by experiments done at the Southwest Research Institute (SwRI).