Linguistic laws are not the law in chimpanzee sexual solicitation gestures.

Two language laws have been identified as manifestations of universal principles of animal behaviour, both acting on the organisation of numerous vocal and behavioural communicative systems. Zipf's law of brevity describes a negative relationship between behavioural length and frequency of behaviour. Menzerath's law defines a negative correlation between the number of behaviours in a sequence and average length of the behaviour composing it. Both laws have been linked with the information-theoretic principle of compression, which tends to minimise code length. We investigate the presence of these two laws in the repertoire of chimpanzee sexual solicitation gestures. We find that chimpanzee solicitation gestures do not follow either Zipf's law of brevity or Menzerath's law consistently. For the second time in ape gestural communication, evidence supporting Zipf's law of brevity was absent, and, here, the presence of Menzerath's law appears individually driven. Ape gesture does not appear to manifest a principle of compression or pressure for efficiency that has been previously proposed to be universal. Importantly, the same signals were shown to adhere to these laws when used in a different behavioural context; highlighting that signallers consider signalling efficiency broadly, and diverse factors play important roles in shaping investment in signal production.

Global Commercial and Sexual Exploitation of Children

The term commercial sexual exploitation of children (CSEC) refers to the for-profit sexual exploitation of children and youth through buying, trading, or selling sexual acts. CSEC is a subset of children and youth who are victims of human trafficking or trafficking in persons (TIP). The Stockholm Declaration defines CSEC as a form of coercion and violence against children that amounts to forced labor and a contemporary form of slavery; there are many forms of CSEC, including child prostitution, child marriage, early marriage, forced marriage, temporary marriage, mail-order brides, child labor, child servitude, domestic servitude, begging, massage, sex tourism, child pornography, online streaming of sexual abuse, sexual extortion of children, and sexual solicitation of children. Not all experiences of sexual servitude are globally recognized. It is critical to explore the concepts of race, inequality, power, culture, and globalization and how they impact the commercial sexual exploitation of children.

Online Child Abuse and Neglect

The past two decades have seen the development, diversification, and intensification of information and communication technologies. The result is that society now has unlimited opportunity for communication and access to information. Despite the multitude of benefits, the Internet has propagated new ways to both sexually victimize and exploit children and youth in an online environment and through multiple formats including sexting, child luring and sexual solicitation, and child sexual abuse images online. This chapter explores each of these forms of child exploitation and concludes by outlining the signs and impact of online abuse.