There is a new publication on education on marine mammal tours. The reference is
Lueck, M. (2015). Education on marine mammal tours – But what do tourists want to learn? Ocean & Coastal Management, 103, 25-33. doi:http://dx.doi.org/10.1016/j.ocecoaman.2014.11.002
Ocean & Coastal Management generously offers the opportunity to download the article until 6th January 2015, free of charge, from the following link:
http://authors.elsevier.com/a/1Q2mg3RKK-PiW1