These are the proceedings of the 2021 Joint American Association of Zoo Veterinarians and European Association of Zoo and Wildlife Veterinarians Conference.

In this issue of Veterinary Clinics: Exotic Animal Practice, Guest Editor Alexander M. Reiter brings his considerable expertise to the topic of sedation and anesthesia of zoological companion animals. Top experts in the field cover key topics such as sedation and anesthesia in fish, amphibians, chelonians, lizards, snakes, and more. Provides in-depth, clinical reviews on sedation and anesthesia of zoological companion animals, providing actionable insights for clinical practice. Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field; Authors synthesize and distill the latest research and practice guidelines to create these timely topic-based reviews. Contains 15 relevant, practice-oriented topics including drug delivery and safety considerations; nerve blocks in zoological companion animals; and more.

This book constitutes the proceedings of the First IAPR International Conference on Discrete Geometry and Mathematical Morphology, DGMM 2021, which was held during May 24-27, 2021, in Uppsala, Sweden. The conference was created by joining the International Conference on Discrete Geometry for computer Imagery, DGCI, with the International Symposium on Mathematical Morphology, ISMM. The 36 papers included in this volume were carefully reviewed and selected from 59 submissions. They were organized in topical sections as follows: applications in image processing, computer vision, and pattern recognition; discrete and combinatorial topology; discrete geometry - models, transforms, visualization; discrete tomography and inverse problems; hierarchical and graph-based models, analysis and segmentation; learning-based approaches to mathematical morphology; multivariate and PDE-based mathematical morphology, morphological filtering. The book also contains 3 invited keynote papers.