Juvenile social play predicts adult reproductive success in male bottlenose dolphins.

For over a century, the evolution of animal play has sparked scientific curiosity. The prevalence of social play in juvenile mammals suggests that play is a beneficial behavior, potentially contributing to individual fitness. Yet evidence from wild animals supporting the long-hypothesized link between juvenile social play, adult behavior, and fitness remains limited. In Western Australia, adult male bottlenose dolphins (Tursiops aduncus) form multilevel alliances that are crucial for their reproductive success. A key adult mating behavior involves allied males using joint action to herd individual females. Juveniles of both sexes invest significant time in play that resembles adult herding-taking turns in mature male (actor) and female (receiver) roles. Using a 32-y dataset of individual-level association patterns, paternity success, and behavioral observations, we show that juvenile males with stronger social bonds are significantly more likely to engage in joint action when play-herding in actor roles. Juvenile males also monopolized the actor role and produced an adult male herding vocalization ("pops") when playing with females. Notably, males who spent more time playing in the actor role as juveniles achieved more paternities as adults. These findings not only reveal that play behavior provides male dolphins with mating skill practice years before they sexually mature but also demonstrate in a wild animal population that juvenile social play predicts adult reproductive success.

In pop pursuit: social bond strength predicts vocal synchrony during cooperative mate guarding in bottlenose dolphins.

Vocal communication is an emblematic feature of group-living animals, used to share information and strengthen social bonds. Vocalizations are also used to coordinate group-level behaviours in many taxa, but little is known of the factors that may influence vocal behaviour during cooperative acts. Allied male Indo-Pacific bottlenose dolphins (Tursiops aduncus) use the 'pop' vocalization as a coercive signal when working together to herd single oestrous females. Using long-term association and acoustic data, we examined the influence of social and non-social factors on pop use by allied male dolphins in this context. Neither pop rate nor pop bout duration were influenced by any of the factors examined. However, allied males with stronger social bonds engaged in higher rates of vocal synchrony; whereby they actively matched the timing of their pop production. Hence, social bond strength influenced pop use in a cooperative context, suggesting dual functions of pop use: to induce the female to remain close, and to promote social bond maintenance and cooperation among males. This article is part of the theme issue 'The power of sound: unravelling how acoustic communication shapes group dynamics'.

Revisiting large complex ventral hernia repair: multimodal hybrid technique deploying preoperative Botulinum Toxin A injection, laparoscopic anterior components separation and open mesh repair.

In the past, various techniques had been described to repair large complex ventral hernias. Laparoscopic technique of components separation showed low complication rates and better overall outcome. Recently, Botulinum Toxin A (BTA) has shown benefit in achieving tension-free repair. We describe here our multimodal technique combining BTA injection, laparoscopic anterior components separation (LACS) and open mesh repair. Ten consecutive cases performed over 3 years were studied. A standardised technique was used with a reasonably short learning curve. Patients who generally fit for general anaesthesia were offered surgery after detailed preoperative imaging work up and informed consent. Demographic details, preoperative risk stratification, intraoperative and postoperative outcomes were recorded and analysed. A structured step by step management strategy was adopted. Total ten (n = 10) cases with median age of 42.5 years (range 28-76 years), male to female ratio of 8:2 and median BMI of 32.6 were included. Three patients had pre-existing stomas. Median diameter of hernial defect was 10 cm, IQR 4.8 cm and range of 6-20 cm. No intraoperative or immediate complications were observed. Median hospital stay was 6 days. Two seromas (20%) and two return to theatre (20%) were observed. One recurrence (10%) was observed after median follow-up of 32 months. No 90-day mortality was recorded. Multimodal technique of BTA injection, LACS and midline mesh repair is a reproducible, safe and effective option to repair large complex ventral hernias.

Efficacy and safety of thermobalancing therapy with Dr Allen's Device for chronic low back pain: A randomised controlled trial.

BACKGROUND: Lumbar disc herniation and non-specific low back pain are common conditions that seriously affect patients' health-related quality of life (HRQoL). Although empirical evidence has demonstrated that novel Thermobalancing therapy and Dr Allen's Device can relieve chronic low back pain, there have been no randomised controlled trials for these indications. AIM: To evaluate the efficacy of Dr Allen's Device in lumbar disc herniation (LDH) and non-specific low back pain (NSLBP). METHODS: A randomised clinical trial was conducted investigating 55 patients with chronic low back pain due to LDH (n = 28) or NSLBP (n = 27), out of which 15 were randomly assigned to the control group and 40 were assigned to the treatment group. The intervention was treatment with Dr Allen's Device for 3 mo. Changes in HRQoL were assessed using the Numerical Pain Rating Scale and the Japanese Orthopedic Association Back Pain Questionnaire. RESULTS: Thermobalancing therapy with Dr Allen's Device showed a significant reduction in pain in the treatment group (P < 0.001), with no recorded adverse effects. Both pain assessment scales showed a significant improvement in patients' perception of pain indicating improvement in HRQoL. CONCLUSION: The out-of-hospital use of Thermobalancing therapy with Dr Allen's Device for Low Back Treatment relieves chronic low back pain significantly and without adverse effects, improves the level of activity and HRQoL among patients with LDH and NSLBP. This study demonstrates the importance of this safe first-line therapy that can be used for effective at-home management of chronic low back pain.