This volume is based on an open call for new knowledge (from across all disiciplines) relevant for the conservation and management of marine mammals in the North Atlantic. 

Volume 11, Sightings Surveys in the North Atlantic: 30 years of counting whales, contains a series of articles presenting results from the North Atlantic Survey Series (NASS). This is a series of internationally coordinated cetacean surveys conducted in the North Atlantic in 1987, 1989, 1995, 2001, 2007 and 2015. The volume also includes articles dealing with other surveys done in the North Atlantic in the period 1987-2016, as well as a technical note on new instrumentation and an overview table of the best available abundance estimates for cetacean species in the North Atlantic.

Scientific Editors: Geneviève Desportes, Rikke Guldborg Hansen and Daniel Pike.

Series Editor: Fern Wickson.

Cover picture credits:
Platform setup: Troels Jacobsen, PolarImages (upper left)
Data reporting: Marine and Freshwater Research Institute, Iceland (top middle)
Aerial survey team: Carsten Egevang, Greenland Institute of Natural Resources (top right)
Narwhal aerial view: Carsten Egevang, Greenland Institute of Natural Resources (bottom left)
Binoculars: Christophe Pampoulie (bottom middle)
Long-finned pilot whale: Geneviève Desportes (bottom right)

Scientific Editors: Christina Lockyer, Aleta Hohn, Robert EA Stewart, Rod Hobbs, and Mario Acquarone

Series Editor: Jill Prewitt

© Cover photos: Barbara Stewart

Scientific Editors: Robert EA Stewart, Kit Kovacs, Mario Acquarone 

Series Editor: Jill Prewitt

Scientific Editors: Geneviève Desportes, Arne Bjørge, Aqqalu Rosing-Asvid and Gordon T Waring

Series Editor: Mario Acquarone

Cover Photos: Aqqalu Rosing-Asvid, Mario Acquarone and Arne Bjørge

Scientific Editors: Christina Lockyer and Daniel Pike

Series Editor: Mario Acquarone

Cover Photo: Lars Witting

Scientific Editors: Tore Haug, Mike Hammill, Droplaug Ólafsdóttir

Series Editors: Daniel G Pike and Mario Acquarone

Cover Photo: Mike Hammill 

Scientific Editors: Tore Haug, Geneviève Desportes, Gísli A Víkingsson, Lars Witting

Series Editor: Daniel G Pike

Scientific Editors: Mads Peter Heide-Jørgensen and Øystein Wiig

Series Editor: Daniel G Pike

Scientific Editors: Geneviève Desportes and Gary McClelland

Series Editor: Daniel G Pike

Scientific Editors: Gísli A Víkingsson and Finn O Kapel

Series Editor: Daniel G Pike

Scientific Editors: Mads Peter Heide-Jørgensen and Christian Lydersen

Series Editor: Sidsel Grønvik