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Sexual dimorphism includes external morphological differences between sexes. In caridean shrimps, the established characteristics for sexing individuals are the presence or absence of an appendix masculina in males and the position of the male/female gonopores. Shrimps of the genus Synalpheus are an exception because males lack appendices masculinae on the second pleopods. Synalpheus males can be distinguished from females by...
Mitonuclear discordance—evolutionary discrepancies between mitochondrial and nuclear DNA phylogenies—can arise from various factors, including introgression, incomplete lineage sorting, recent or ancient demographic fluctuations, sex‐biased dispersal asymmetries, among others. Understanding this phenomenon is crucial for accurately reconstructing evolutionary histories, as failing to account for discordance can lead to misinte...
Sex and age predict habitat selection in the world’s most geographically extensive lion populationNARA Subscribed
Conservation of large carnivore populations requires effective management strategies that promote landscape-scale protection and genetic connectivity. Pivotal to the success of these strategies is sufficient evidence, including quantifying the processes that govern species distribution. We used telemetry data from 63 lions from the Kavango-Zambezi Transfrontier Conservation Area (KAZA TFCA) in southern Africa to analyze inter-...
Validation of a new acoustic telemetry transmitter for the study of predation events in small fishesNARA Subscribed
Acoustic telemetry has emerged as an important tool for studying the movement and behavior of aquatic animals. Predation‐sensing acoustic transmitters combine the functions of typical acoustic transmitters with the added ability to identify the predation of tagged animals. The objective of this paper was to assess the performance of a newly miniaturized acid‐based predation‐sensing acoustic transmitter (Innovasea V3D; 0.33 g i...
Synergistic effects of plasma S100B and MRI measures of cerebrovascular disease on cognition in older adultsNARA Subscribed
There is growing interest in studying vascular contributions to cognitive impairment and dementia (VCID) and developing biomarkers to identify at-risk individuals. A combination of biofluid and neuroimaging markers may better profile early stage VCID than individual measures. Here, we tested this possibility focusing on plasma levels of S100 calcium-binding protein B (S100B), which has been linked with blood–brain-barrier (BBB...
Mechanical and poroelastic behavior of porous tuff under drained and undrained conditionsNARA Subscribed
A series of drained and undrained water-saturated constant mean-stress tests were performed to investigate the strength, elasticity, and poroelastic response of a water-saturated high porosity nonwelded tuff. Drained strengths are found to increase with increasing effective confining pressures. Elastic moduli increase with increasing mean stress. Undrained strengths are small due to development of high pore pressures that gene...
The zoonotic bacterium Coxiella (C.) burnetii can be excreted by infected goats through birth products and milk. The detection of C. burnetii DNA in the mammary gland tissue of infected dairy goats and intermittent milk shedders has been reported, but confirmation of C. burnetii bacteria in the udder remained pending. The pathogen caused abortions in a 152-head dairy goat herd, resulting in the vaccination against C. burnetii...
Regional differences in the link between water exchange rate across the blood–brain barrier and cognitive performance in normal agingNARA Subscribed
The blood–brain barrier (BBB) undergoes functional changes with aging which may contribute to cognitive decline. A novel, diffusion prepared arterial spin labeling-based MRI technique can measure the rate of water exchange across the BBB ( k w ) and may thus be sensitive to age-related alterations in water exchange at the BBB. However, studies investigating relationships between k w and cognition have reported different direct...
Genomic analysis of Bornean geckos (Gekkonidae: Cyrtodactylus ) reveals need for updated taxonomyNARA Subscribed
Using molecular genetic data, recognised diversity within the gecko genus Cyrtodactylus has more than doubled, with many lineages that were once thought to be wide‐ranging being delimited into multiple independent species. On the Southeast Asian island of Borneo, there has been a recent renewed focus on reptile taxonomy, as genetic data have demonstrated a high amount of unrecognised biodiversity. We herein advance this taxono...
Intraspecific variation in mycorrhizal response is much larger than ecological literature suggestsNARA Subscribed
Mycorrhizal response is the most common metric for characterizing how much benefit a plant derives from mycorrhizal symbiosis. Traditionally, ecologists have used these metrics to generalize benefit from mycorrhizal symbiosis in plant species, ignoring the potential for plant intraspecific trait variation to alter the outcome of the mutualism. In order for mean trait values to be useful as a functional trait to describe a spec...