The Role of Touch in Select Social Interactions of Atlantic Spotted Dolphin (\u3ci\u3eStenella frontalis\u3c/i\u3e) and Indo-Pacific Bottlenose Dolphin (\u3ci\u3eTursiops aduncus\u3c/i\u3e)

In this descriptive study, the potentially communicative functions of non-vocal behaviors produced by two species of dolphin, Atlantic spotted (Stenella frontalis) and Indo-Pacific bottlenose (Tursiops aduncus), were examined in the context of three focal events: depart (one or more dolphins depart company of others), join (two or more dolphins come together), and contact (dolphin makes contact with another using a part of its body). These particular events were chosen because they involve interactions between dolphins and so provide an opportunity to examine possible precursors or antecedents to specific social behaviors. Non-vocal behaviors occurring before and/or after these focal events were documented and analyzed in an attempt to determine if certain behaviors were consistently associated with the departure (depart) or arrival (join) of another dolphin, or with physical contact (contact) between dolphins in each species. Touch behaviors were found to be significantly related to each of the three focal events so were examined in further detail. Overall, in comparing species, the Indo-Pacific bottlenose and Atlantic spotted dolphins in this descriptive study exhibited more similarities than differences in their use of touch behaviors in potentially communicative situations across five broad behavioral contexts. However, a difference in the use of touch behaviors produced before departing or after joining a conspecific was noted. Specifically, the spotted dolphins were more likely to use contact after joining than before departing, whereas the bottlenose dolphins were equally likely to use contact in both situations

Play in Wild and Captive Cetaceans

Although play behavior is difficult to define, it has been abundantly documented in the cetaceanliterature. Play behavior is prevalent among the various taxa and is exhibited by individuals of all ageclasses. However, it is often difficult to follow individuals, observe underwater behavior, and obtainmultiple sightings of individuals when investigating free-ranging populations. Captive studies allowfor the systematic manipulation of variables and the collection of detailed data with regard toindividuals, age, and gender by being able to observe behavior both at the surface and underwater.Pooling information from both wild and captive studies of play allows for more robust theories,conclusions and understanding. In this paper, we provide a review of play behavior in both wild andcaptive cetacean populations as a first step toward a more complete understanding of the significanceof cetacean play

Play in Wild and Captive Cetaceans

Although play behavior is difficult to define, it has been abundantly documented in the cetaceanliterature. Play behavior is prevalent among the various taxa and is exhibited by individuals of all ageclasses. However, it is often difficult to follow individuals, observe underwater behavior, and obtainmultiple sightings of individuals when investigating free-ranging populations. Captive studies allowfor the systematic manipulation of variables and the collection of detailed data with regard toindividuals, age, and gender by being able to observe behavior both at the surface and underwater.Pooling information from both wild and captive studies of play allows for more robust theories,conclusions and understanding. In this paper, we provide a review of play behavior in both wild andcaptive cetacean populations as a first step toward a more complete understanding of the significanceof cetacean play

A Comparison of Pectoral Fin Contact Behaviour for Three Distinct Dolphin Populations

Tactile exchanges involving the pectoral fin have been documented in a variety of dolphin species. Several functions (e.g., social, hygienic) have been offered as possible explanations for when and why dolphins exchange pectoral fin contacts. In this study, we compared pectoral fin contact between dolphin dyads from three distinct dolphin populations: two groups of wild dolphins; Atlantic spotted dolphins (Stenella frontalis) from The Bahamas and Indo-Pacific bottlenose dolphins (Tursiops aduncus) from around Mikura Island, Japan; and one group of captive bottlenose dolphins (Tursiops truncatus) residing at the Roatan Institute for Marine Sciences, Anthony\u27s Key Resort. A number of similarities were observed between the captive and wild groups, including; rates of pectoral fin contact, which dolphin initiated contact, posture preference, and same-sex rubbing partner preference. Unlike their wild counterparts, however, dolphins in the captive study group engaged in petting and rubbing at equal rates, females were more likely to contact males, males assumed the various rubbing roles more frequently than females, and calves and juveniles were more likely to be involved in pectoral fin contact exchanges. These results suggest that some aspects of pectoral fin contact behaviour might be common to many dolphin species, whereas other aspects could be species specific, or could be the result of differing environmental and social conditions

Role of Peers in Cultural Innovation and Cultural Transmission: Evidence from the Play of Dolphin Calves

Observations of the spontaneous play behaviors of a group of captive bottlenose dolphins ( Tursiops truncatus ) revealed that each individual calf’s play became more complex with increasing age, suggesting that dolphin play may facilitate the ontogeny and maintenance of flexible problem solving skills. If this is so, play may have evolved to help young dolphins learn to adapt to novel situations. Novel play behaviors were more likely to be produced by dolphin calves than by adults, demonstrating that calves were the main source of innovative play behaviors in the group. Calves were also more likely to imitate novel play behaviors first produced by another dolphin, suggesting that calves contribute significantly to the spread of novel behaviors within a group. All in all, these data suggest that peers may be important catalysts for both cultural innovation and cultural transmission, and that the opportunity to interact with peers may enhance the effect play has on the emergence of flexible problem solving skills

Paediatric COVID-19 mortality: a database analysis of the impact of health resource disparity

Background The impact of the COVID-19 pandemic on paediatric populations varied between high-income countries (HICs) versus low-income to middle-income countries (LMICs). We sought to investigate differences in paediatric clinical outcomes and identify factors contributing to disparity between countries.Methods The International Severe Acute Respiratory and Emerging Infections Consortium (ISARIC) COVID-19 database was queried to include children under 19 years of age admitted to hospital from January 2020 to April 2021 with suspected or confirmed COVID-19 diagnosis. Univariate and multivariable analysis of contributing factors for mortality were assessed by country group (HICs vs LMICs) as defined by the World Bank criteria.Results A total of 12 860 children (3819 from 21 HICs and 9041 from 15 LMICs) participated in this study. Of these, 8961 were laboratory-confirmed and 3899 suspected COVID-19 cases. About 52% of LMICs children were black, and more than 40% were infants and adolescent. Overall in-hospital mortality rate (95% CI) was 3.3% [=(3.0% to 3.6%), higher in LMICs than HICs (4.0% (3.6% to 4.4%) and 1.7% (1.3% to 2.1%), respectively). There were significant differences between country income groups in intervention profile, with higher use of antibiotics, antivirals, corticosteroids, prone positioning, high flow nasal cannula, non-invasive and invasive mechanical ventilation in HICs. Out of the 439 mechanically ventilated children, mortality occurred in 106 (24.1%) subjects, which was higher in LMICs than HICs (89 (43.6%) vs 17 (7.2%) respectively). Pre-existing infectious comorbidities (tuberculosis and HIV) and some complications (bacterial pneumonia, acute respiratory distress syndrome and myocarditis) were significantly higher in LMICs compared with HICs. On multivariable analysis, LMIC as country income group was associated with increased risk of mortality (adjusted HR 4.73 (3.16 to 7.10)).Conclusion Mortality and morbidities were higher in LMICs than HICs, and it may be attributable to differences in patient demographics, complications and access to supportive and treatment modalities