P. Duncan results 179
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Behavioral Response of Oyster Valve Gape to Ecological Conditions in an Intermittently Closed EstuaryNARA Subscribed
Low-inflow estuaries are highly variable and productive habitats. Organisms in these systems must cope with constantly changing conditions. This study investigates the continuous response of oysters to environmental stimuli in a small, low-inflow, estuary, Los Peñasquitos Lagoon (LPL), in San Diego, California, USA. The oysters were placed on a mooring at near-surface and near-bottom locations and instrumented with noninvasive...
Quantifying the Viscoelastic Properties of Pancreatic Tissue: A Comparative Study of Human, Porcine and Engineered HydrogelNARA Subscribed
Pancreatoduodenectomy (PD) is among the most complex abdominal procedures, with a leak from the pancreatic anastomosis (postoperative pancreatic fistula, POPF) continuing to be a major source of morbidity and mortality. The mechanical characteristics of the pancreas, particularly tissue texture, are closely linked to POPF risk, yet remain poorly defined, limiting the accuracy of currently available training models. This study...
Reef fishes are a cornerstone of Seychelles’ Blue Economy, but their abundance is not static in space and time. To test whether monsoon season and the associated ocean temperature change drive variations in abundant reef fish assemblages, Baited Remote Underwater Video Systems (BRUVS) were used around Frégate Island, Seychelles. Overall, 30 BRUVS were deployed at 10 sites shortly after both the North-West (NW) and South-East (...
What delays naturalization? how planting effort, traits and cold tolerance influence the lag phase in woody horticultural speciesNARA Subscribed
Horticulture is a major source of plant invasions in urban areas. There is often a delay, known as the lag phase, between the introduction of a non-native species and its establishment in the wild. Understanding the factors driving the lag phase and how it varies among species is key to predicting future plant naturalizations. In this study, we analyzed nursery and naturalization records of 128 naturalized tree and shrub speci...
Some invasive species threaten native species because they possess traits to which natives are evolutionarily naïve. In Australia, many predators have been severely impacted by the introduction of cane toads, which produce toxins that native species have never encountered. Torresian crows, however, have been observed consuming cane toads safely by avoiding their toxin glands, suggesting learned behavioural adaptations. To inve...
Interpretable deep learning reveals spatiotemporal MRI features of brain aging that align with neurodegenerationNARA Subscribed
Cortical thinning and atrophy are hallmarks of brain aging that have been characterized using magnetic resonance imaging (MRI). Brain aging involves many neuroanatomic features whose effects on brain structure remain unexplored. To address this challenge, we trained interpretable deep neural networks (DNNs) to estimate brain age (BA) from T 1 -weighted ( T 1 w) MRI. By identifying MRI features unapparent to humans, DNNs can fi...
Alzheimer’s disease (AD) disproportionately affects women and carriers of the apolipoprotein E ε4 allele (APOE4), yet little is known about how sex and APOE interact to influence white matter (WM) integrity during disease progression. We integrated diffusion MRI and matched blood transcriptomic data to investigate these interactions and their underlying biological mechanisms. WM microstructure was quantified using diffusion te...
Key message New wheat- Ae. mutica introgression lines will deliver new genetic variation for hexaploid wheat breeding and provide new information on the distribution of homoeologous recombination between wheat and Ae. mutica . Abstract Aegilops mutica Boiss. (2n = 2 × = 14, TT) is a wild relative of wheat that has been underutilised as a source of genetic variation for hexaploid wheat Triticum aestivum L. (2n = 6 × = 42; AABBD...
Predicting the progression of MCI and Alzheimer’s disease on structural brain integrity and other features with machine learningNARA Subscribed
Machine learning (ML) on structural MRI data shows high potential for classifying Alzheimer’s disease (AD) progression, but the specific contribution of brain regions, demographics, and proteinopathy remains unclear. Using Alzheimer’s Disease Neuroimaging Initiative (ADNI) data, we applied an extreme gradient-boosting algorithm and SHAP (SHapley Additive exPlanations) values to classify cognitively normal (CN) older adults, th...
Environmental heterogeneity is especially important in determining the distribution and spatial management of marine mammals. Intra-annual changes in distribution exhibited by highly mobile species such as baleen whales, however, present a challenge to traditional area-based management measures which should be accounted for in the designations, but these data are typically lacking. In the present study, we investigated the sea...
Grapevine leafroll disease (GLD) affects grapevines worldwide. The primary causal agent of GLD is grapevine leafroll-associated virus 3 (GLRaV-3), which spreads to uninfected grapevines via mealybugs and soft-scale insects. Pseudococcus calceolariae (Hemiptera: Pseudococcidae) is a mealybug vector of GLRaV-3 in New Zealand. P. calceolariae also colonizes clovers ( Trifolium spp.) growing naturally as vineyard ground cover. Sep...