Cost-effective scat-detection dogs: unleashing a powerful new tool for international mammalian conservation biology

Recently, detection dogs have been utilized to collect fecal samples from cryptic and rare mammals. Despite the great promise of this technique for conservation biology, its broader application has been limited by the high cost (tens to hundreds of thousands of dollars) and logistical challenges of employing a scat-detection dog team while conducting international, collaborative research. Through an international collaboration of primatologists and the Chinese Ministry of Public Security, we trained and used a detection dog to find scat from three species of unhabituated, free-ranging primates, for less than $3,000. We collected 137 non-human primate fecal samples that we confirmed by sequencing taxonomically informative genetic markers. Our detection dog team had a 92% accuracy rate, significantly outperforming our human-only team. Our results demonstrate that detection dogs can locate fecal samples from unhabituated primates with variable diets, locomotion, and grouping patterns, despite challenging field conditions. We provide a model for in-country training, while also building local capacity for conservation and genetic monitoring. Unlike previous efforts, our approach will allow for the wide adoption of scat-detection dogs in international conservation biology

Evaluating cortical bone porosity using Hr-Pqct

This work aims to evaluate cortical porosity through a high-resolution peripheral quantitative micro-tomography in a group of 47 patients. All patients, in vivo, were subjected to the medical care protocol of the University Hospital Clementino Fraga, 020-213. Patients were women aged from 37 to 82 years old, who did not present fractures in their lower and upper limbs, all of them showing good health. During screening, they were required to have normal BMD (as determined by DXA; T-score ≥ 1.0) and no low-trauma fractures history. The exclusion criteria for all the individuals enrolled in this control study include, for example, alcoholism, chronic drug use, and chronic gastrointestinal disease. Male patients ranging from 42 to 79 years old presented the same health issues as women group. Results showed an increase in the amount of pores on the cortical bone of the evaluated patients over time; however, this increase was also observed in pore diameter, as well as a decrease in the border between the cortical and trabecular bone, indicating a deterioration in cortical bone quality over the years