Good morning, I am trying to gather information about the time that some odontocetes and mysticetes spend at sea surface between diving behaviours as a part of one of my thesis chapters. It is proving very diffucult to find such information for all cetacean species - even hunting literature that goes back more than 50 years, so If you have data like this, know of publications that do, or could refer me to people who might, I would really appreciate it if you emailed me with any leads. I thank you for your time and advice, Blanca Morales GuerreroPhd. Student in Dr. Karina Acevedo-Whitehouse's labQuerétaro (México)blanca_morales_guerrero@hotmail.com