R. Madden results 66
· Newest (Page 1/3, per page 25)
Author: R. Madden ×Clear All Filters
Search Results
Integrating Lab‐ and Field‐Based Approaches to Decipher Individuals' Response to Anthropogenic ChangeNARA Subscribed
The global expansion of human activities increasingly exposes wild animals to novel, potentially threatening conditions. Consistent behavioural responses to perceived risk may be detrimental to wildlife, either by limiting foraging opportunities or by overexposing them to lethal hazards. We examine the relationship between risk responses, movement patterns and survival in fan‐tailed ravens ( Corvus rhipidurus ) inhabiting Isra...
Associations of alternative cannabis product use and poly-use with subsequent illicit drug use initiation during adolescenceNARA Subscribed
Rationale Specific cannabis products may differentially increase risk of initiating non-cannabis illicit drug use during adolescence. Objective To determine whether ever- and poly-use of smoked, vaporized, edible, concentrate, or blunt cannabis products are associated with subsequent initiation of non-cannabis illicit drug use. Methods High school students from Los Angeles completed in-classroom surveys. The analytic sample (...
Marine protected areas (MPAs) globally serve conservation and fisheries management goals, generating positive effects in some marine ecosystems. Surf zones and sandy beaches, critical ecotones bridging land and sea, play a pivotal role in the life cycles of numerous fish species and serve as prime areas for subsistence and recreational fishing. Despite their significance, these areas remain understudied when evaluating the eff...
Short‐term resilience to climate‐induced temperature increases for equatorial sea turtle populationsNARA Subscribed
Projection models are being increasingly used to manage threatened taxa by estimating their responses to climate change. Sea turtles are particularly susceptible to climate change as they have temperature‐dependent sex determination and increased sand temperatures on nesting beaches could result in the ‘feminisation’ of hatchling sex ratios for some populations. This study modelled likely long‐term trends in sand temperatures...
Operational sex ratio estimated from drone surveys for a species threatened by climate warmingNARA Subscribed
Rising sand temperatures resulting from climate warming may cause the ‘feminization’ of sea turtle populations, which have temperature-dependent sex determination. In July and October 2021, we conducted surveys using a drone (also referred to as an unmanned aerial vehicle or UAV) and shore-based observations to assess the operational sex ratio (OSR) (number of males and females in breeding condition) for green turtles ( Chelon...
Modeling total predation to avoid perverse outcomes from cat control in a data‐poor island ecosystemNARA Subscribed
Data‐hungry, complex ecosystem models are often used to predict the consequences of threatened species management, including perverse outcomes. Unfortunately, this approach is impractical in the many systems that have insufficient data to parameterize ecosystem interactions or reliably calibrate or validate such models. We devised a different approach composed of a minimum realistic model that guides decisions in data‐ and res...
Prolonging survival in good health is a fundamental societal goal. However, the leading determinants of disability-free survival in healthy older people have not been well established. Data from ASPREE, a bi-national placebo-controlled trial of aspirin with 4.7 years median follow-up, was analysed. At enrolment, participants were healthy and without prior cardiovascular events, dementia or persistent physical disability. Disab...
Most of Earth's terrestrial carbon is stored in the soil and can be released as carbon dioxide (CO 2 ) when disturbed. Although humans are known to exacerbate soil CO 2 emissions through land‐use change, we know little about the global carbon footprint of invasive species. We predict the soil area disturbed and resulting CO 2 emissions from wild pigs ( Sus scrofa ), a pervasive human‐spread vertebrate that uproots soil. We do...
An introduction to decision science for conservationNARA Subscribed
Biodiversity conservation decisions are difficult, especially when they involve differing values, complex multidimensional objectives, scarce resources, urgency, and considerable uncertainty. Decision science embodies a theory about how to make difficult decisions and an extensive array of frameworks and tools that make that theory practical. We sought to improve conceptual clarity and practical application of decision science...