Dear colleagues: It is my pleasure to announce the next publication of the book: Cetaceans: Evolution, Behavior and Conservation. Nova Science Publishers, Inc. ISBN: 978-1-53614-998-2 https://novapublishers.com/shop/cetaceans-evolution-behavior-and-conservatio... Thanks to Nova for this new opportunity to publish with them. All the authors of this book have been collaborating for years on a binomial between fieldwork and mathematical analysis. Science is interdisciplinary and I would like to thank all the authors for their confidence in allowing me to help them with my mathematical approaches. I would also like to thank Bruno Díaz for his kind foreword. Many Regards, -- *********************************************************************** Daniel Patón Domínguez Numerical Ecology. Ecology Unit Department of Plant Biology, Ecology and Earth Sciences Faculty of Sciences. University of Extremadura Avda. Elvas s/n 06071 Badajoz (Spain) http://unex.academia.edu/DanielPatonDominguez https://www.researchgate.net/profile/Daniel_Paton/ http://sites.google.com/site/numericalecologyuex/home https://es.linkedin.com/in/daniel-patón-domínguez-787546106 ***********************************************************************