scholarly journals When should cuckolded males care for extra-pair offspring?

2012 ◽  
Vol 279 (1739) ◽  
pp. 2877-2882 ◽  
Author(s):  
Jannis Liedtke ◽  
Lutz Fromhage

In socially monogamous species with bi-parental care, males suffer reduced reproductive success if their mate engages in extra-pair copulations (EPCs). One might therefore expect that males should refuse to care for a brood if they can detect that an EPC has occurred. Here, we use a game-theory model to study male brood care in the face of EPCs in a cooperatively breeding species in which offspring help to raise their (half-) siblings in their parents' next breeding attempt. We show that under certain conditions males are selected to care even for broods completely unrelated to themselves. This counterintuitive result arises through a form of pseudo-reciprocity, whereby surviving extra-pair offspring, when helping to rear their younger half-siblings, can more than compensate for the cost incurred by the male that raised them. We argue that similar effects may not be limited to cooperative breeders, but may arise in various contexts in which cooperation between (half-) siblings occurs.

2012 ◽  
Vol 279 (1736) ◽  
pp. 2151-2156 ◽  
Author(s):  
Dieter Lukas ◽  
Tim Clutton-Brock

Comparative studies of social insects and birds show that the evolution of cooperative and eusocial breeding systems has been confined to species where females mate completely or almost exclusively with a single male, indicating that high levels of average kinship between group members are necessary for the evolution of reproductive altruism. In this paper, we show that in mammals, the evolution of cooperative breeding has been restricted to socially monogamous species which currently represent 5 per cent of all mammalian species. Since extra-pair paternity is relatively uncommon in socially monogamous and cooperatively breeding mammals, our analyses support the suggestion that high levels of average kinship between group members have played an important role in the evolution of cooperative breeding in non-human mammals, as well as in birds and insects.


Coronaviruses ◽  
2021 ◽  
Vol 01 ◽  
Author(s):  
Gaurav Dhiman

: In this letter, the psychological impact of COVID-19 on cancer infected patients is discussed. Cancer is a serious health-related problem in the human body nowadays. The 2019 pandemic of coronavirus disease has developed into an unheard-of pandemic. Given the havoc wreaked by this pathogen worldwide, many countries have implemented a severe, legally enforced method of social distancing, in the form of a lockdown. Unless adequate preventive measures are taken, the cost of the pandemic and subsequent lockdown can prove to be irreparable. The obvious consequences of this lockout, such as the escalating levels of unemployment, imminent economic crisis, and extreme food scarcity faced by the sudden unemployed migrant labour population, have been widely reported. Cancer patients are a highly vulnerable group even during non-pandemic periods, often presenting late in the course of their illness, without the services required to avail recommended care. The incidence of psychological complications and emotional distress is considerably higher than in the general population, and the trauma of both the pandemic and subsequent lockdown contributes significantly to their mental trauma. This analysis is geared at solving the challenges faced by cancer patients in the face of this pandemic and subsequent lockdown, with a look at potential solutions that can be enforced.


2014 ◽  
Vol 652 (1) ◽  
pp. 206-221
Author(s):  
Anton Harber

Two decades of contestation over the nature and extent of transformation in the South African news media have left a sector different in substantive ways from the apartheid inheritance but still patchy in its capacity to fill the democratic ideal. Change came fast to a newly open broadcasting sector, but has faltered in recent years, particularly in a public broadcaster troubled by political interference and poor management. The potential of online media to provide much greater media access has been hindered by the cost of bandwidth. Community media has grown but struggled to survive financially. Print media has been aggressive in investigative exposé, but financial cutbacks have damaged routine daily coverage. In the face of this, the government has turned its attention to the print sector, demanding greater—but vaguely defined—transformation and threatened legislation. This has met strong resistance.


2014 ◽  
Vol 108 (1) ◽  
pp. 1-40 ◽  
Author(s):  
Nico Krisch

The consensual structure of the international legal order, with its strong emphasis on the sovereign equality of states, has always been somewhat precarious. In different waves over the centuries, it has been attacked for its incongruence with the realities of inequality in international politics, for its tension with ideals of democracy and human rights, and for standing in the way of more effective problem solving in the international community. While surprisingly resilient in the face of such challenges, the consensual structure has seen renewed attacks in recent years. In the 1990s, those attacks were mainly “moral” in character. They were related to the liberal turn in international law, and some of them, under the banner of human rights, aimed at weakening principles of nonintervention and immunity. Others, starting from the idea of an emerging “international community,” questioned the prevailing contractual models of international law and emphasized the rise of norms and processes reflecting community values rather than individual state interests. Since the beginning of the new millennium, the focus has shifted, and attacks are more often framed in terms of effectiveness or global public goods. Classical international law is regarded as increasingly incapable of providing much-needed solutions for the challenges of a globalized world; as countries become ever more interdependent and vulnerable to global challenges, an order that safeguards states’ freedoms at the cost of common policies is often seen as anachronistic. According to this view, what is needed—and what we are likely to see—is a turn to nonconsensual lawmaking mechanisms, especially through powerful international institutions with majoritarian voting rules.


eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Brendan Cornwell ◽  
Katrina Armstrong ◽  
Nia S Walker ◽  
Marilla Lippert ◽  
Victor Nestor ◽  
...  

Climate change is dramatically changing ecosystem composition and productivity, leading scientists to consider the best approaches to map natural resistance and foster ecosystem resilience in the face of these changes. Here we present results from a large-scale experimental assessment of coral bleaching resistance, a critical trait for coral population persistence as oceans warm, in 221 colonies of the coral Acropora hyacinthus across 37 reefs in Palau. We find that bleaching resistant individuals inhabit most reefs but are found more often in warmer microhabitats. Our survey also found wide variation in symbiont concentration among colonies, and that colonies with lower symbiont load tended to be more bleaching resistant. By contrast, our data show that low symbiont load comes at the cost of lower growth rate, a tradeoff that may operate widely among corals across environments. Corals with high bleaching resistance have been suggested as a source for habitat restoration or selective breeding in order to increase coral reef resilience to climate change. Our maps show where these resilience corals can be found, but the existence of tradeoffs with heat resistance may suggest caution in unilateral use of this one trait in restoration.


Author(s):  
Ping Lin ◽  
K. Selçuk Candan

The cost of creating and maintaining software and hardware infrastructures for delivering web services led to a notable trend toward the use of application service providers (ASPs) and, more generally, distributed application hosting services (DAHSs). The emergence of enabling technologies, such as J2EE and .NET, has contributed to the acceleration of this trend. DAHSs rent out Internet presence, computation power, and data storage space to clients with infrastructural needs. Consequently, they are cheap and effective outsourcing solutions for achieving increased service availability and scalability in the face of surges in demand. However, ASPs and DAHSs operate within the complex, multi-tiered, and open Internet environment and, hence, they introduce many security challenges that have to be addressed effectively to convince customers that outsourcing their IT needs is a viable alternative to deploying complex infrastructures locally. In this chapter, we provide an overview of typical security challenges faced by DAHSs, introduce dominant security mechanisms available at the different tiers in the information management hierarchy, and discuss open challenges


2020 ◽  
Vol 54 (6) ◽  
pp. 108-113
Author(s):  
Sarah Freeman ◽  
Jake Gentle ◽  
Tim Conway

AbstractAs wind generation becomes more prevalent, it is critical that these resources remain secure and, perhaps more significantly, resilient in the face of cyberattacks. Additionally, the remote locations of offshore wind assets increase the cost associated with responding to cyber incidents. Existing risk assessment techniques, such as consequence prioritization and MITRE ATT&CK, can be used by the wind industry to identify potential impacts from cyberattacks. This perspective can then inform cybersecurity investment strategies for greatest impact.


Author(s):  
Aaron Rock-Singer

The late 19th century saw the rise of a new textual object: Islamic print media. Whether journals, magazines, or books, these texts were self-consciously religious and reflected broader shifts in technology, literacy, and religious authority. Islamic print media was distinct from previous mediums for transmitting Islamic knowledge by its basic technological component: rather than a manuscript that must be copied by hand (and is thus produced in response to demand from particular purchasers), the cost of print media was bound up primarily in the original production process and erred on the side of greater, rather than lesser, diffusion. Over the past nearly century and a half, a still wider array of forms of Islamic print media have emerged, ranging from journals to magazines to short pocket-sized pamphlets. The rise and spread of Islamic print media was part and parcel of a broader shift in authority in Muslim-majority societies. It was a time of the decisive passing of an old order of urban notables by which prominent religious, economic, and military chiefs served as mediators between ruler and ruled. In its stead, new bureaucratic elites, often the product of state educational institutions, emerged as key participants in constituting a broader public sphere. In this context, the scholarly elite split between those who derived their authority primarily from association with modernizing states and others who sought to preserve the traditional independence of the ulama. It was a time during which Sufi orders struggled to retain their historic mediating function and declined in the face of an increasing powerful state (and the seizure of Islamic endowments controlled by these orders), as well as the rise of mass political movements. It was a time during which modernizing states laid increasing claim to the daily lives of its citizens through education, employment, and incarceration. It was also a time of rising literacy, which opened up new opportunities for scholars and lay men and women alike to define Islam for a broader audience. Crucially for those interested in affecting change, it was a time of popular protests across the Middle East and South Asia. Islamic print media was both a key technology and a central site of contestation in the midst of these momentous transformations. It would be used by lay persons who sought to challenge the old scholarly elite, as well as by these elites to retain or reconstitute their authority in radically different political, cultural, and religious circumstances. At the heart of the battle over Islamic print media was a basic question of authority: Who should be able to speak in the name of Islam? To what extent could Islamic print media producers take financial considerations into account? Should they include advertising, and if so, what kind of products were religiously legitimate? How should one treat an Islamic journal or magazine—was it a holy object or everyday ephemera? How was it similar to and different from non-Islamic print media? These tensions and questions, present in other forms of Islamic media today, would never be fully resolved.


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