1. Faculty of Biology; Moscow State University; Vorobiovy gory 1/12 Moscow 119992 Russia
2. Kamchatka Branch of Pacific Institute of Geography FEB RAS; Pr. Rybakov 19-a Petropavlovsk-Kamchatsky 683024 Russia
3. Sea Mammal Research Unit; Scottish Oceans Institute; University of St Andrews; St Andrews Fife KY168LB Scotland
4. Commander Islands Nature and Biosphere Reserve; Gagarina 4 Nikolskoye Kamchatsky krai 684500 Russia
5. Whale and Dolphin Conservation; Park House, Allington Park Bridport Dorset, DT65DD United Kingdom