Rain, recreation and risk: Human activity and ecological disturbance create seasonal risk landscapes for the prey of an ambush predator.

Predation risk and prey responses exhibit fluctuations in space and time. Seasonal ecological disturbances can alter landscape structure and permeability to influence predator activity and efficacy, creating predictable patterns of risk for prey (seasonal risk landscapes). This may create corresponding seasonal shifts in antipredator behaviour, mediated by species ecology and trade-offs between risk and resources. Yet, how human recreation interacts with seasonal risk landscapes and antipredator behaviour remains understudied. In South Florida, we investigated the impact of a seasonal ecological disturbance, specifically flooding, which is inversely related to human activity, on interactions between Florida panthers (Puma concolor coryi) and white-tailed deer (Odocoileus virginianus). We hypothesized that human activity and ecological disturbances would interact with panther-deer ecology, resulting in the emergence of two distinct seasonal landscapes of predation risk and the corresponding antipredator responses. We conducted camera trap surveys across southwestern Florida to collect detection data on humans, panthers and deer. We analysed the influence of human site use and flooding on deer and panther detection probability, co-occurrence and diel activity during the flooded and dry seasons. Flooding led to decreased panther detections and increased deer detections, resulting in reduced deer-panther co-occurrence during the flooded season. Panthers exhibited increased nocturnality and reduced diel activity overlap with deer in areas with higher human activity. Supporting our hypothesis, panthers' avoidance of human recreation and flooding created distinct risk schedules for deer, driving their antipredator behaviour. Deer utilized flooded areas to spatially offset predation risk during the flooded season while increasing diurnal activity in response to human recreation during the dry season. We highlight the importance of understanding how competing risks and ecological disturbances influence predator and prey behaviour, leading to the generation of seasonal risk landscapes and antipredator responses. We emphasize the role of cyclical ecological disturbances in shaping dynamic predator-prey interactions. Furthermore, we highlight how human recreation may function as a 'temporal human shield,' altering seasonal risk landscapes and antipredator responses to reduce encounter rates between predators and prey.

Deer movement and resource selection during Hurricane Irma: implications for extreme climatic events and wildlife.

Extreme climatic events (ECEs) are increasing in frequency and intensity and this necessitates understanding their influence on organisms. Animal behaviour may mitigate the effects of ECEs, but field studies are rare because ECEs are infrequent and unpredictable. Hurricane Irma made landfall in southwestern Florida where we were monitoring white-tailed deer (Odocoileus virginianus seminolus) with GPS collars. We report on an opportunistic case study of behavioural responses exhibited by a large mammal during an ECE, mitigation strategies for reducing the severity of the ECE effects, and the demographic effect of the ECE based on known-fate of individual animals. Deer altered resource selection by selecting higher elevation pine and hardwood forests and avoiding marshes. Most deer left their home ranges during Hurricane Irma, and the probability of leaving was inversely related to home range area. Movement rates increased the day of the storm, and no mortality was attributed to Hurricane Irma. We suggest deer mobility and refuge habitat allowed deer to behaviourally mitigate the negative effects of the storm, and ultimately, aid in survival. Our work contributes to the small but growing body of literature linking behavioural responses exhibited during ECEs to survival, which cumulatively will provide insight for predictions of a species resilience to ECEs and improve our understanding of how behavioural traits offset the negative impacts of global climate change.

Body parts and the market place: insights from Thomistic philosophy.

With rare exceptions, Roman Catholic moral theologians condemn the sale of human organs for transplantation. Yet, such criticism, while rhetorically powerful, often oversimplifies complex issues. Arguments for the prohibition of a market in human organs may, therefore, depend on a single premise, or a cluster of dubious and allied premises, which when examined cannot hold. In what follows, I will examine the ways in which such arguments are configured. For example, Thomas Aquinas' (1224-1274) understandings of embodiment and moral uses of the body are usually interpreted as, and cited in support of, foreclosing a market in human organs. Aquinas' principle of totality requires that one preserve the wholeness of the human body. In approaching Aquinas' texts, I will assume the role of a revisionist who takes seriously his core commitments, while at the same time indicating that one can further develop his understanding of the body in ways which are supportive of the sale of human organs while remaining in conformity with the author's core concerns. Such considerations will provide significant grounds for concluding that a market in human organs for transplantation appreciates the embodied nature of the human person, respects the body and its parts as personal, rather than as mere things, is consistent with acknowledging God's dominion over our lives and bodies, and constitutes an appropriate utilization of God's gifts to us. Moreover, such a market would likely create significant opportunities charitably to help others, to enhance human dignity and to protect against the serious dehumanization of current national bureaucratic procedures for organ donation.