Graham Ryan results 55
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Aim To assess phylogeographic structure, phylogenetic diversity and historical diversification processes in ammotrechid camel spiders from the Baja California Peninsula. Location Baja California Sur, Mexico. Time Period Miocene to Pleistocene. Major Taxa Studied Ammotrechid camel spiders (Solifugae: Ammotrechidae). Methods We conducted the first phylogeographic analysis of Baja California Sur ammotrechid camel spiders using mi...
Who knows poo? Inaccuracy of scat identifications in the field necessitates genetic confirmation of scat donorsNARA Subscribed
Non-invasive sampling using faeces can provide valuable ecological information on rare and elusive species, for example histological diet analyses. However, inaccurate field identifications can prejudice our understanding of carnivore ecology. We assessed the accuracy of field identifications for scats collected (2014–2016) across the Greater Limpopo Transfrontier Conservation Area, in southern Africa, that were putatively ide...
DNA methylation-based surrogate markers of C-reactive protein and their associations with health-related traitsNARA Subscribed
Several methylation-based surrogate markers of C-reactive protein ( mCRP ) have been proposed and used to assess the risk of age-related phenotypes and construct novel ageing markers. We aimed to (i) assess the variance in plasma CRP explained by several mCRP markers; (ii) compare their associations with three health-related traits: mortality, body mass index (BMI), and PCGrimAge ; and (iii) assess the stability of CRP and mCR...
The Toxicology Investigators Consortium 2024 Annual ReportNARA Subscribed
Cheetah (Acinonyx jubatus) diet in the wild-prey-depleted, but livestock-abundant, Limpopo National Park, MozambiqueNARA Subscribed
Understanding carnivore resource use, particularly in regions with depleted wild-prey and abundance of livestock that characterise much of their remaining habitat, is crucial to their effective conservation and management. We assessed cheetah ( Acinonyx jubatus ) diet in the prey-depleted, but livestock-abundant, Limpopo National Park (LNP, Mozambique), using scats genetically confirmed to be from cheetah. Cheetah consumed mai...
Global Marine Flyways Identified for Long‐Distance Migrating Seabirds From Tracking DataNARA Subscribed
Aim To identify the broad‐scale oceanic migration routes (‘marine flyways’) used by multiple pelagic, long‐distance migratory seabirds based on a global compilation of tracking data. Location Global. Time Period 1989–2023. Major Taxa Studied Seabirds (Families: Phaethontidae, Hydrobatidae, Diomedeidae, Procellariidae, Laridae and Stercorariidae). Methods We collated a comprehensive global tracking dataset that included the mig...
Seagrass wasting disease prevalence and lesion area increase with invertebrate grazing across the northeastern PacificNARA Subscribed
Disease is a key driver of community and ecosystem structure, especially when it strikes foundation species. In the widespread marine foundation species eelgrass ( Zostera marina ), outbreaks of wasting disease have caused large‐scale meadow collapse in the past, and the causative pathogen, Labyrinthula zosterae , is commonly found in meadows globally. Research to date has mainly focused on abiotic environmental drivers of sea...
The Toxicology Investigators Consortium 2023 Annual ReportNARA Subscribed
Scared of the dark? Nychthemeral sociality in territorial black wildebeest (Connnochaetes gnou) bullsNARA Subscribed
The degree of prey sociality reflects trade-offs between predation risk, and competition for mates and resources. Consequently, the degree of sociality is predicted to differ spatiotemporally. Variations in nychthemeral sociality are, however, understudied. We assessed the activity of solitary, territorial black wildebeest bulls ( Connochaetes gnou ) over rutting and non-rutting seasons. We predicted that solitary bulls would...
Attempts to geochemically distinguish between metamorphic-hydrothermal systems that form orogenic gold deposits and both reduced and oxidized magmatic-hydrothermal systems using isotopes or metal associations have proven ambiguous, particularly for orogenic gold and reduced intrusion-related gold systems. The absence of conclusive geochemical discriminators and the overlap in geologic characteristics have led to gold deposit m...
The Toxicology Investigators Consortium 2022 Annual ReportNARA Subscribed