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- Genetic diversity in the American elephantfish (Chimaeriformes: Callorhinchus callorynchus) and among its congenersPublication . Erk, Cornelia Pia; Concha, Francisco J.; Awruch, Cynthia; Finucci, Brittany; Cristiani, Franco; Guzmán‐Castellanos, Ana B.; Silva, Charlene da; Veríssimo, AnaUnderstanding genetic population structure and connectivity is essential for effective species-specific management and conservation strategies. The American elephantfish Callorhinchus callorynchus is targeted and retained as incidental catch in commercial and recreational fisheries in Chile and Argentina. Its wide-ranging distribution across southern South America may require transnational co-operation to ensure sustainable use, but its current population structure is not known. In this work, we analysed the levels of genetic diversity and differentiation within C. callorynchus in South America using two mitochondrial markers, the control region (CR) and the cytochrome oxidase subunit I gene (CO1). Moreover, we assessed levels of genetic diversity within, and divergence among, the three extant callorhinchids (genus Callorhinchus), a group that exhibits allopatric geographical distributions in the southern hemisphere. Overall, sequence analyses of the mitochondrial CR and the CO1 revealed extremely low levels of sequence variation both within and among Callorhinchus species. Genetic homogeneity was found throughout the range of C. callorynchus coupled to low-frequency haplotype sharing across spatially distant locations in Chile and Argentina, suggesting gene flow along the South American coast. Moreover, our analyses supported a scenario of recent population expansion of the species in South America. Given the absence of dispersive eggs or juvenile stages in chondrichthyans, gene flow is mainly mediated by actively swimming adults. Based on the available data, gene flow in callorhinchids appears to occur along continuous coastal regions, with deep oceanic waters serving as strong barriers. Findings here provide an important baseline for future research on dispersal and gene flow in holocephalans.
- Human branding in political marketing: a systematic literature review and agenda for future researchPublication . Soares, Vitor Reis; Rodriguez y Rodriguez, Martius Vicente; Montalvão, Sérgio de Sousa; Martins Rodrigues, Maria Carolina; Oliveira, Antonio Batista da SilvaWhen Speed, Butler, and Collins introduced the theory of human brands into the field of political marketing, the topic garnered increasing interest from researchers. As a result of this growing academic attention, it became essential to update key concepts and clarify emerging terminologies in order to advance the conceptual and theoretical understanding of this evolving literature. To address this need, we conducted a systematic literature review (SLR) to identify the theories, research contexts, characteristics, and methodological approaches explored within the domain. Through this review, we modernized fundamental concepts such as authority, authenticity, humanization, and positioning. Furthermore, building on the theory of political brands and contributions related to human brands, we propose a basic definition of the human brand in politics. As the first SLR in this area, this paper serves as both a guide for marketing professionals developing human brands and a resource for researchers. It provides guidance on conducting an SLR and highlights future research directions, presenting a forward-looking agenda with 16 potential avenues for addressing existing gaps in the field.